Komatsu PC58UU-3 Shop Manual
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Komatsu PC58UU-3 Shop Manual

Komatsu PC58UU-3 Shop Manual

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Table of Contents

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MACHINE MODEL
PC58UU-3
• This shop manual may contain attachiments and optional equipment that are not available in your
area. Please consult your local Komatsu distributor for those items you may require.
Materials and specifications are subject to change without notice.
• PC58UU-3 mounts the 4D88E-3G and 4D88E-5XBB engine.
For details of the engine, see the 68E-88E Series Engine Shop Manual.
© 2004
All Rights Reserved
Printed in Japan 08-04(02)
SERIAL NUMBER
20001 and up
SEBM023907
00-1
(7)

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Summary of Contents for Komatsu PC58UU-3

  • Page 1 20001 and up • This shop manual may contain attachiments and optional equipment that are not available in your area. Please consult your local Komatsu distributor for those items you may require. Materials and specifications are subject to change without notice.
  • Page 2 CONTENTS No. of page GENERAL ........................... 01-1 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD ......................... 10-1 TESTING AND ADJUSTING ................20-1 DISASSEMBLY AND ASSEMBLY ..............30-1 OTHERS ..........................90-1 00-2 PC58UU-3...
  • Page 3 10-30 10-72 10-112 20-15 01-9-1 10-31 10-73 10-113 20-101 01-10 10-32 10-74 10-115 20-102 01-11 10-33 10-75 10-116 20-103 01-11-1 10-34 10-76 10-117 20-104 01-12 10-35 10-77 10-118 20-105 01-13 10-36 10-78 10-119 20-106 10-37 10-79 10-120 20-106-1 00-2-1 PC58UU-3...
  • Page 4 20-248 20-531 20-619 20-338 20-205 20-249 20-532 20-620 20-339 20-206 20-250 20-533 20-340 20-207 20-251 20-534 20-341 30-1 20-208 20-252 20-535 20-342 30-2 20-209 20-253 20-343 20-536 30-3 20-210 20-254 20-344 20-537 30-4 20-211 20-345 20-538 20-255 30-5 00-2-2 PC58UU-3...
  • Page 5 30-20 30-21 30-22 30-23 30-24 30-25 30-26 30-27 30-28 30-29 30-30 30-31 30-32 30-33 30-34 30-35 30-36 30-37 30-38 30-39 30-40 30-41 30-42 30-43 30-44 30-45 30-46 30-47 30-48 30-49 30-50 30-51 30-52 30-53 30-54 30-55 30-56 30-57 00-2-3 PC58UU-3...
  • Page 6 Proper service and repair is extremely important for safe machine operation. The service and repair techniques recommended by Komatsu and described in this manual are both effective and safe. Some of these techniques require the use of tools specially designed by Komatsu for the specific purpose.
  • Page 7 SAFETY SAFETY NOTICE PRECAUTIONS DURING WORK 19.Be sure to assemble all parts again in their origi- nal places. 11. When removing the oil filler cap, drain plug or Replace any damaged parts with new parts. hydraulic pressure measuring plugs, loosen •...
  • Page 8 FOREWORD GENERAL FOREWORD GENERAL This shop manual has been prepared as an aid to improve the quality of repairs by giving the serviceman an accurate understanding of the product and by showing him the correct way to perform repairs and make judge- ments.
  • Page 9 DISTRIBUTION AND UPDATING Any additions, amendments or other changes will be Symbol Item Remarks sent to KOMATSU distributors. Get the most up-to- date information before you start any work. Special safety precautions Safety are necessary when per- forming the work.
  • Page 10 FOREWORD HOISTING INSTRUCTIONS HOISTING INSTRUCTIONS HOISTING Slinging near the edge of the hook may cause k Heavy parts (25 kg or more) must be lifted the rope to slip off the hook during hoisting, and a serious accident can result. Hooks have max- with a hoist, etc.
  • Page 11 FOREWORD METHOD OF DISASSEMBLING, CONNECTING PUSH-PULL TYPE COUPLER METHOD OF DISASSEMBLING, CONNECTING PUSH-PULL TYPE COUPLER k Before carrying out the following work, release Type 1 the residual pressure from the hydraulic tank. For details, see TESTING AND ADJUSTING, Releasing residual pressure from hydraulic tank.
  • Page 12 FOREWORD METHOD OF DISASSEMBLING, CONNECTING PUSH-PULL TYPE COUPLER Type 2 Type 3 1) Hold the mouthpiece of the tightening portion 1) Hold the mouthpiece of the tightening portion and push body (2) in straight until sliding pre- and push body (2) in straight until sliding pre- vention ring (1) contacts contact surface a of vention ring (1) contacts contact surface a of the hexagonal portion at the male end.
  • Page 13 The recommended coating materials such as adhesives, gasket sealants and greases used for disassembly and assembly are listed below. For coating materials not listed below, use the equivalent of products shown in this list. Category Komatsu code Part No. Q'ty Container Main applications, featuresr •...
  • Page 14 FOREWORD COATING MATERIALS Category Komatsu code Part No. Q'ty Container Main applications, featuresr • Used as lubricant for sliding portion LM-G 09940-00051 60 g (to prevent from squeaking). Molybdenum • Used to prevent seizure or scuffling disulphide of the thread when press fitting or...
  • Page 15 FOREWORD STANDARD TIGHTENING TORQUE STANDARD TIGHTENING TORQUE STANDARD TIGHTENING TORQUE TABLE (WHEN USING TORQUE WRENCH) In the case of metric nuts and bolts for which there is no special instruction, tighten to the torque given in the table below. Tightening torque Thread diameter Width across of bolt...
  • Page 16 FOREWORD STANDARD TIGHTENING TORQUE TABLE OF TIGHTENING TORQUES FOR SPLIT FLANGE BOLTS In the case of split flange bolts for which there is no special instruction, tighten to the torque given in the table below. Thread diameter Width across flat Tightening torque 59 –...
  • Page 17 FOREWORD STANDARD TIGHTENING TORQUE TIGHTENING TORQUE FOR 102 ENGINE SERIES 1) BOLT AND NUTS Use these torques for bolts and nuts (unit: mm) of Cummins Engine. Thread diameter Tightening torque 10 0 2 1.02 0 0.20 24 0 4 2.45 0 0.41 43 0 6 4.38 0 0.61 77 0 12...
  • Page 18 FOREWORD ELECTRIC WIRE CODE ELECTRIC WIRE CODE In the wiring diagrams, various colors and symbols are employed to indicate the thickness of wires. This wire code table will help you understand WIRING DIAGRAMS. Example: 5WB indicates a cable having a nominal number 5 and white coating with black stripe. CLASSIFICATION BY THICKNESS Copper wire Current...
  • Page 19 FOREWORD CONVERSION TABLE CONVERSION TABLE METHOD OF USING THE CONVERSION TABLE The Conversion Table in this section is provided to enable simple conversion of figures. For details of the method of using the Conversion Table, see the example given below. EXAMPLE •...
  • Page 20 FOREWORD CONVERSION TABLE Millimeters to Inches 1 mm = 0.03937 in 0.039 0.079 0.118 0.157 0.197 0.236 0.276 0.315 0.354 0.394 0.433 0.472 0.512 0.551 0.591 0.630 0.669 0.709 0.748 0.787 0.827 0.866 0.906 0.945 0.984 1.024 1.063 1.102 1.142 1.181 1.220 1.260...
  • Page 21 FOREWORD CONVERSION TABLE Liter to U.S. Gallon 1l = 0.2642 U.S. Gal 0.264 0.528 0.793 1.057 1.321 1.585 1.849 2.113 2.378 2.642 2.906 3.170 3.434 3.698 3.963 4.227 4.491 4.755 5.019 5.283 5.548 5.812 6.076 6.340 6.604 6.869 7.133 7.397 7.661 7.925 8.189...
  • Page 22 FOREWORD CONVERSION TABLE kgm to ft. lb 1 kgm = 7.233 ft. lb 14.5 21.7 28.9 36.2 43.4 50.6 57.9 65.1 72.3 79.6 86.8 94.0 101.3 108.5 115.7 123.0 130.2 137.4 144.7 151.9 159.1 166.4 173.6 180.8 188.1 195.3 202.5 209.8 217.0 224.2...
  • Page 23 FOREWORD CONVERSION TABLE kg/cm to lb/in 1kg/cm = 14.2233 lb/in 14.2 28.4 42.7 56.9 71.1 85.3 99.6 113.8 128.0 142.2 156.5 170.7 184.9 199.1 213.4 227.6 241.8 256.0 270.2 284.5 298.7 312.9 327.1 341.4 355.6 369.8 384.0 398.3 412.5 426.7 440.9 455.1 469.4...
  • Page 24 FOREWORD CONVERSION TABLE Temperature Fahrenheit-Centigrade Conversion ; a simple way to convert a Fahrenheit temperature reading into a Cen- tigrade temperature reading or vice versa is to enter the accompanying table in the center or boldface col- umn of figures. These figures refer to the temperature in either Fahrenheit or Centigrade degrees.
  • Page 25 FOREWORD UNITS UNITS In this manual, the measuring units are indicated with Internatinal System of units (SI). As for reference, conventionally used Gravitational System of units are indicated in parentheses { Example: N {kg} Nm {kgm} MPa {kg/cm kPa {mmH kPa {mmHg} kW/rpm {HP/rpm} g/kWh {g/HPh}...

  • Page 26: Table Of Contents

    01 GENERAL GENERAL ASSEMBLY DRAWING....01- 2 WORK EQUIPMENT RANGE DRAWING..01- 3 SPECIFICATIONS ........... 01- 4 WEIGHT TABLE..........01-11 LIST OF LUBRICANTS AND COOLANT..01-13 01-1 PC58UU-3...

  • Page 27: General Assembly Drawing

    GENERAL GENERAL ASSEMBLY DRAWING GENERAL ASSEMBLY DRAWING PC58UU-3 Item Unit Road liner shoe spec Rubber shoe spec City pad shoe spec Canopy spec 5,330 5,230 5,280 Operating weight Cab spec 5,390 5,290 5,340 Bucket capacity (SAE) m³ 0.22 4D88E-3G Engine model —...

  • Page 28: Work Equipment Range Drawing

    GENERAL WORK EQUIPMENT RANGE DRAWING WORK EQUIPMENT RANGE DRAWING Unit: mm Machine Model PC58UU-3 Max. digging reach 5,660 Max. digging depth 4,000 Max. digging height 6,330 Max. vertical wall depth 2,900 Max. dumping height 4,600 Min. swing radius of work equip-...

  • Page 29: Specifications

    GENERAL SPECIFICATIONS SPECIFICATIONS Machine Model PC58UU-3 Serial Number 20001 – 22000 Specifications Canopy specification Cab specification Buket capacity (SAE) m³ 0.22 0.22 Operating weight 5,230 [5,330] 5,290 [5,390] Max. digging depth 4,000 4,000 Max. vertical wall depth 2,900 2,900 Max. digging reach...
  • Page 30 GENERAL SPECIFICATIONS Machine Model PC58UU-3 Serial Number 20001 – 22000 Specifications Canopy specification Cab specification Model 4D88E-3G Type 4-cycle, water cooled, vertical, direct injection No. of cylinders-bore x stroke 4-88 x 90 Piston displacement {cc} 2.189 {2,189} Flywheel horsepower 29.4/2,400 {40/2, 400}...
  • Page 31 GENERAL SPECIFICATIONS Machine Model PC58UU-3 Serial Number 20001 – 22000 Specifications Canopy specification Cab specification Type Reciprocating piston φ 95 Cylinder (inside diameter) φ 55 Diameter of piston rod Stroke Max. distance between pins 2,133 Min. distance between pins 1,238...
  • Page 32 GENERAL SPECIFICATIONS Machine Model PC58UU-3 Serial Number 22001 and up Specifications Canopy specification Cab specification Buket capacity (SAE) 0.22 0.22 Operating weight 5,230 [5,330] 5,290 [5,390] Max. digging depth 4,000 4,000 Max. vertical wall depth 2,900 2,900 Max. digging reach...
  • Page 33 GENERAL SPECIFICATIONS Machine Model PC58UU-3 Serial Number 22001 – 22300 Specifications Canopy specification Cab specification Model 4D88E-5XBB Type 4-cycle, water cooled, vertical, direct injection No. of cylinders-bore x stroke 4 – 88 x 90 l {cc} Piston displacement 2.189 {2,189}...
  • Page 34 GENERAL SPECIFICATIONS Machine Model PC58UU-3 Serial Number 22301 and up Specifications Canopy specification Cab specification Model 4D88E-5XBB Type 4-cycle, water cooled, vertical, direct injection No. of cylinders-bore x stroke 4 – 88 x 90 l {cc} Piston displacement 2.189 {2,189}...
  • Page 35 GENERAL SPECIFICATIONS Machine Model PC58UU-3 22001 and up Serial Number Specifications Canopy specification Cab specification Type Reciprocating piston Cylinder (inside diameter) Diameter of piston rod Stroke Max. distance between pins 2,133 Min. distance between pins 1,238 Type Reciprocating piston Cylinder (inside diameter)

  • Page 36: Weight Table

    WEIGHT TABLE WEIGHT TABLE k This mass list is for reference in handling or transporting these components. Unit: kg Machine model PC58UU-3 Serial Number 20001 – 22000 22001 – 22300 Engine assembly (without water or oil) • Engine (without water or oil) •...
  • Page 37 GENERAL WEIGHT TABLE Unit: kg Machine model PC58UU-3 Serial Number 22301 and up Engine assembly (without water or oil) • Engine (without water or oil) • Engine mount • PTO • Hydraulic pump Cooling assembly • Radiator • Oil cooler...
  • Page 38 GENERAL WEIGHT TABLE Unit: kg Machine model PC58UU-3 Serial Number 20001 – 22000 22001 and up Boom assembly • 1st boom • 2nd boom • 3rd bracket • Sub-link Arm assembly Bucket link assembly Bucket assembly (with 680 mm-with side cutter)

  • Page 39: List Of Lubricants And Coolant

    Grease system Grease Hyper white grease — — Cooling system Coolant Add antifreeze — *1. Serial No.: 20001 – 22000 *2. Serial No.: 22001 and up *3. Serial No.: 20001 – 22300 *4. Serial No.: 22301 and up 01-13 PC58UU-3...
  • Page 40 TRAVEL PPC VALVE ........10-77 PPC VALVE ............10-81 HYDRAULIC CYLINDER ........10-90 SOLENOID VALVE .........10-93 MULTI CONTROL VALVE ......10-98-1 WORK EQUIPMENT ........10-99 AIR CONDITIONING PIPING .......10-105 ENGINE CONTROL ........10-106 ELECTRICAL CONTROL SYSTEM ..... 10-108 ELECTRICAL SYSTEM ........ 10-115 MONITOR SYSTEM ........10-133 10-1 PC58UU-3...

  • Page 41: Pto

    STRUCTURE, FUNCTION AND MAINTENANCE STANDARD Boss 2. Spring pin 3. Rubber 4. Cover 5. Hydraulic pump 10-2 PC58UU-3...

  • Page 42: Cooling System

    Vacuum valve cracking pressure : 9. Oil cooler outlet -4.9 kPa {-0.05 kg/cm²} 10. Oil cooler inlet 11. Drain valve Oil cooler Core type : SF-4 Fin pitch : 4.5/2 mm Total heat dissipation surface : 3.77 m² 10-3 PC58UU-3...

  • Page 43: Power Train

    8. Control pump (for pilot control) 3. Swing motor 9. Center swivel joint 4. Travel motor 10. 2-speed travel changeover solenoid valve 5. Engine 11. Swing machinery 6. Hydraulic pump (for travel and work equip- 12. Swing circle ment) 10-4 PC58UU-3...

  • Page 44: Swing Circle

    3. Greasing to swing circle pinion Reduction ratio : 90/10 = 9.0 4. Outer race Grease : G2-LI (ALBANIA EP-2) 5. Inner race 6. Ball 7. Seal a. Inner race soft zone position b. Outer race soft zone position 10-5 PC58UU-3...

  • Page 45: Swing Machinery

    4. No. 2 sun gear (number of teeth: 22) 5. Ring gear (number of teeth: 86) 6. No. 2 planetary gear (number of teeth: 32) Swing machinery case 8. Swing pinion (number of teeth: 10) 9. Taper roller bearing 10-6 PC58UU-3...
  • Page 46 0.07 ~ 0.21 — pinion Backlash between swing 0.19 ~ 0.87 pinion and swing circle Standard size Tolerance Repair limit Wear on swing pinion col- Apply hardchrome lar’s contact surface against plating recondition, 51.8 oil seal or replace - 0.074 10-7 PC58UU-3...

  • Page 47: Track Frame, Idler Cushion

    STRUCTURE, FUNCTION AND MAINTENANCE STANDARD TRACK FRAME, IDLER CUSHION TRACK FRAME, IDLER CUSHION Serial No.: 20001 – 22300 10-8 PC58UU-3...
  • Page 48 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD TRACK FRAME, IDLER CUSHION Serial No.: 22301 and up 10-8-1 PC58UU-3...
  • Page 49 10. Track shoe 11. Idler cushion 11a. Support 11b. Plate 11c. Cover 11d. Rod 11e. Cylinder 11f. Recoil spring 11g. Rear support 11h. Nut 11j. Grease fitting Idler guard (road liner specification, steel shoe specification) Holding bracket for shipping 10-9 PC58UU-3...

  • Page 50: Idler

    Standard clearance Clearance limit Side clearance of idler (on one side) 0.25 Standard size Repair limit Tread wall thickness Rebuild or (at center of tread) replace 10.3 — Oil capacity 20 cc (Engine oil : EO 30-CD) — 10-10 PC58UU-3...

  • Page 51: Track Roller

    Track roller side clear- ance (on one side) 0.17 - 0.40 0.81 Standard size Repair limit Tread wall thickness Rebuild or (at center of tread) replace 26.5 22.5 — Oil capacity 135 cc (Gear oil : GO 140) — 10-11 PC58UU-3...

  • Page 52: Carrier Roller

    Interference between Shaft Hole roller and bearing +0.018 -0.031 - ø — -0.013 -0.012 0.012 Standard size Repair limit Rebuild or Tread wall thickness replace — Grease capacity 30 cc (Grease : ALBANIA EP-2) — 10-12 PC58UU-3...

  • Page 53: Sprocket

    +1.0 diameter ø ø 380.37 -2.0 Wear on addendum ø ø 423.99 diameter -3.0 Rebuild or replace Wear on addendum width — Wear on tooth bottom +0.5 width -1.0 Tooth bottom wall thick- +0.492 75.185 69.0 ness -1.075 10-13 PC58UU-3...

  • Page 54: Track Shoe

    STRUCTURE, FUNCTION AND MAINTENANCE STANDARD TRACK SHOE TRACK SHOE ROAD LINER AND TRIPLE GROUSER SHOE Serial No.: 20001 – 22300 1. Road liner shoe 2. Triple grouser shoe 10-14 PC58UU-3...
  • Page 55 18.075 12.075 replace be press fit) Standard size Turned limit Repair limit Reverse or Bushing wall thickness replace 6.05 4.55 3.05 Tightening torque for shoe 140 ± 20 Nm {14 ± 2 kgm} Retighten bolt 10-15 PC58UU-3...
  • Page 56 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD TRACK SHOE Serial No.: 22301 and up *1. Triple grouser shoe *2. Road liner 10-15-1 PC58UU-3...
  • Page 57 Height of • Triple or replace grouser • Road liner Replace Repair by over- Thickness of • Triple laying welding grouser or replace Tightening torque of shoe 137 ± 19.6 Nm {14 ± 2 kgm} Retighten bolt 10-15-2 PC58UU-3...
  • Page 58 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD TRACK SHOE TRIPLE GROUSER SHOE Unit: mm Check item Criteria Remedy Standard size Repair limit Grouser height Plate thickness Grouser base length Rebuild or replace Grouser edge length 10-16 PC58UU-3...
  • Page 59 RUBBER SHOE Serial No.: 20001 – 22300 Unit: mm Check item Criteria Remedy Standard size Repair limit Wear of lug height Wear of roller guard Replace Standard size Tolerance Repair limit Wear of sprocket meshing portion ± 0.5 10-17 PC58UU-3...
  • Page 60 TRACK SHOE Serial No.: 22301 and up Unit: mm Check item Criteria Remedy Standard size Repair limit Wear of lug height Wear of roller guide Replace Wear of meshing parts of – 3 sprocket Wear of roller tread height 10-17-1 PC58UU-3...

  • Page 61: Hydraulic Equipment Layout Drawing

    5. Oil cooler 14. Offset cylinder 6. Hydraulic pump 15. Boom cylinder 7. Center swivel joint 16. Blade cylinder 8. R.H. work equipment PPC valve 17. Offset PPC valve 9. L.H. work equipment PPC valve 18. 5-spool solenoid valv 10-18 PC58UU-3...

  • Page 62: Hydraulic Tank And Filter

    38 ± 15 kPa {0.39 ± 0.15 kg/cm²} 6. Suction strainer Vacuum valve cracking pressure : Oil filler cap 0 ~ 5 kPa {0 ~ 0.05 kg/cm²} Bypass valve set pressure : 103 ± 19.6 kPa {1.05 ± 0.2 kg/cm²} 10-19 PC58UU-3...

  • Page 63: Hydraulic Pump

    • This pump has a double pump to control the 2. Tandem gear pump (For swing, blade + pilot) pump absorption torque by sensing the engine speed and a tandem gear pump for swing and blade + pilot. 10-20 PC58UU-3...
  • Page 64 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD HYDRAULIC PUMP 3. Case Cylinder block 4. Rocker cam Valve plate 5. Shoe Spring (in servo piston) 6. Piston 10. Servo piston 11. Ball (for rocker cam supporting) 10-21 PC58UU-3...
  • Page 65 The piston (6) moves in the axial direction rel- atively in each cylinder of the cylinder block (7). • The cylinder block (7) rotates relatively while sealing pressurized oil against the valve plate (8), and the plane is designed to balance the oil pressure properly. 10-22 PC58UU-3...
  • Page 66 0. And the pump comes to stop absorbing or discharging oil, i.e., the pump stops. (However, the swash plate angle never comes to 0 practically.) In other words, the swash plate angle α • and the pump delivery are in the propor- tional relations. 10-23 PC58UU-3...
  • Page 67 (8). The 2 long oval ports of valve plate (8) are equivalent to the 2 discharge ports of the pump, thus the pump operates as a dou- ble pump. 10-24 PC58UU-3...
  • Page 68 /min) = 9.6 kW [13.0 PS] + 6.60 kW [9.0 PS] = 16.2 kW [22.0 PS] The average of the oil flow on both sides is l l l l l l l l lowered from 50.0 /min to 25.0 /min (by 50%). 10-25 PC58UU-3...
  • Page 69 PAVE: Pump average pressure port PE: Control piston pressure point PEPC: EPC main pressure input port Lock nut Piston EPC valve Plug Seat 11. Sleeve Spring Plug 12. Spool Spool Lever 13. Washer Sleeve 10. Spool 14. Spring 10-26 PC58UU-3...
  • Page 70 When the metering differential pressure is high (When the engine speed is high), the LS pressure is set a little high. When the metering differential pressure is low (When the engine speed is low), the LS pressure is set a little low. 10-27 PC58UU-3...
  • Page 71 (about 100%). • If the X command current sent to the EPC valve increased, relationship between the PAVE pump average pres- sure and Q pump discharge is translated in proportion to the pressing force of the EPC valve solenoid. 10-28 PC58UU-3...

  • Page 72: Control Valve

    P1: From main pump (variable pump) PLS1: L.H. travel LS pressure P2: From main pump (variable pump) PLS2: R.H. travel LS pressure P3: From main pump (gear pump) PLS3: Work equipment LS pressure PI: From boom RAISE PPC valve 10-29 PC58UU-3...
  • Page 73 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD CONTROL VALVE 10-30 PC58UU-3...
  • Page 74 20. Spool (arm) 9. Suction valve (offset head) 21. Spool (bucket) 10. Suction valve (bucket head) 22. Spool (offset) 11. Suction valve (arm head) 23. Spool (blade) 12. Suction valve (boom head) 24. Spool (swing) 25. Unload valve 10-31 PC58UU-3...
  • Page 75 10. Swing relief valve (for gear pump) 11. Plug (boom assist valve) The above F and R means the following valves: 12. Pressure compensation valve R (offset) F: Flow control valve 13. Pressure compensation valve R ( R: Pressure reducing valve 10-32 PC58UU-3...
  • Page 76 22. Pressure compensation valve R (boom) 10. LS bypass plug (LS2) 11. Spool (pump merge-divider valve) The above F and R means the following valves: 12. Unload valve F: Flow control valve 13. Check valve R: Pressure reducing valve 10-33 PC58UU-3...
  • Page 77 22. Plug (boom assist valve) 10. Check valve 11. Suction valve The above F and R means the following valves: 12. Pressure compensation valve R (bucket) F: Flow control valve 13. Pressure compensation valve F (offset) R: Pressure reducing valve 10-34 PC58UU-3...
  • Page 78 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD CONTROL VALVE Spool (swing) 2. Swing relief valve (for gear pump) 3. Safety valve 4. Pressure bleeding plug 10-35 PC58UU-3...
  • Page 79 (arm, bucket, blade) {0.20 kg} {0.16 kg} Check valve spring 1.96 N 1.57 N 21.9 x 5.0 15.8 — (boom) {0.20 kg} {0.16 kg} Check valve spring 2.26 N 1.77 N 16.4 x 7.50 9.90 — (boom) {0.23} {0.18 kg} 10-36 PC58UU-3...

  • Page 80: Clss

    Saving of energy by variable pump control Configuration • The CLSS consists of a variable displacement piston pump, a control valve and actuators. • The pump body consists of a main pump, a PC valve and LS valve. 10-37 PC58UU-3...
  • Page 81 When the set pressure is raised (when the actua- tor load pressure is low), the pump swash plate angle will move in the direction of minimum. For the detail of the operation, see the paragraph of "Hydraulic Pump". 10-38 PC58UU-3...
  • Page 82 (inlet) and the downstream (outlet) of each valve becomes constant irrespective of load (pressure). So, the flow from the pump is distributed (compensated) in proportion to the opening areas S1 and S2 of each valve being operated. 10-39 PC58UU-3...
  • Page 83 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD CLSS EACH FUNCTION AND OPERATION OF EACH VALVE Hydraulic circuit diagram and valve names 10-40 PC58UU-3...
  • Page 84 9. Check valve 10. Lift check valve Set pressure : 0.14 MPa {1.40 kg/cm²} 11. Cooler bypass valve Set pressure : 0.39 MPa {4.0 kg/cm²} 12. Swing relief valve (for gear pump) Set pressure : 21.6 MPa {220 kg/cm²} 10-41 PC58UU-3...
  • Page 85 {25.0 kg/cm²}, the spool (1) will move toward the right side and the pump circuit PP1 and PP2 will interconnect to the tank circuit T through the drill hole. • Therefore, the pump discharge pressure PP1 and PP2 are set to 2.45 MPa {25.0 kg/cm²}. 10-42 PC58UU-3...
  • Page 86 PLS1 and PLS2: LS circuit (pressure) PLS1, PLS2 and the pump discharge pres- PP1 and PP2 : Pump circuit (pressure) sure PP1, PP2 increases because the open- : Tank circuit ing area of the control valve spool is small. 10-43 PC58UU-3...
  • Page 87 (2) pushes the spool to the left side. • As a result, the pump circuit PP1, PP2 and the tank circuit T are interrupted, and the pump delivery Q1 and Q2 are completely flown to the actuator circuit. 10-44 PC58UU-3...
  • Page 88 : Tank circuit larly, it is set in the separate mode by the pump merge-divider valve. Accordingly, each unload valve on the PP1 and PP2 sides oper- ates according to the respective opening ratios of right and left travel spools. 10-45 PC58UU-3...
  • Page 89 As the pressure reducing valve (3) moves to the right, the pump discharge pressure PP3 is reduced due to pressure loss at notch c and is led to the LS circuit PLS3 and to the spring chamber PLS’. 10-46 PC58UU-3...
  • Page 90 LS differential pressure for higher safety. Operation • Pressurized oil in the LS circuit PLS flows from the filter a to the tank circuit T through orifice b. 10-47 PC58UU-3...
  • Page 91 (1) and the flow control valve (2) to the left side. • The flow control valve (2) throttles the open- ing area between the pump circuit PP and the spool upstream PPA and causes a pressure loss between PP and PPA. 10-48 PC58UU-3...
  • Page 92 • When the ratio is less than 1.00 : The expression PP - PPB < PLS - PA (= A) can be held, and the flow is distributed more than the spool opening area ratio. 10-49 PC58UU-3...
  • Page 93 PLSB is set to PLS through the b LS intro- duction throttle of pressure compensation valve (1). Since PLS is connected through the LS bypass plug (4) to the T tank circuit, some pressure is lost in the b LS introduction throttle (PLS < PLSB). 10-50 PC58UU-3...
  • Page 94 The bridge circuits PA of the control valves in both travel circuits are connected to each other by the junction circuit L. If a difference is made in the flow between both travel motors, it is corrected to reduce the travel deviation. 10-51 PC58UU-3...
  • Page 95 PA travel actuator circuits (Left A > Right A). • At this time, the main pump is in the separate mode and the oil flow in both travel motors changes according to the open area of the spool. 10-52 PC58UU-3...
  • Page 97 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD CLSS SWING AND BLADE VALVE Structure • The swing and blade sections are the open center valve of the gear pump. The blade sec- tion is arranged in tandem in the rear of the swing section. 10-54 PC58UU-3...
  • Page 98 B7 port. • If the blade spool is pulled to move the spool to the right, oil flows in the A7 port. • The load check valve has A port and B port, one each, in its spool. 10-55 PC58UU-3...
  • Page 99 BR port signals. of the swing motor (The highest pressure is output to the BR port of the swing motor). • The arm and swing control valves are con- nected to each other by the internal pilot path. 10-56 PC58UU-3...
  • Page 100 (excluding the swing PPC pressure) is applied to the a port, the c output port of the pump merge-divider valve is con- nected through the spool (1) to the d spring chamber and the PPC pressure is used as the seal drain pressure. 10-57 PC58UU-3...
  • Page 101 PP1, PP2, and PP3 pump pressures. • At this time, the PLS1, PLS2 and PLS3 LS pressures are separated, too. The pump pres- sure is output as the PLS output pressure to the pump LS valve. 10-58 PC58UU-3...
  • Page 102 PPC pressure is not applied to the pump merge-divider valve but is drained because the logic valve is switched. • At neutral, pressure PP1 and PP2 are merged because spring force is stronger that travel PPC spool pressing force. 10-59 PC58UU-3...
  • Page 103 If the machine swings, the swing starting pressure rises higher than the main circuit pressure and moves the c spool in the b boom assist valve spool to the left to supply oil from the gear pump to the main pump. 10-60 PC58UU-3...

  • Page 104: Center Swivel Joint

    T: To hydraulic tank T1: From travel motor drain port Rotor 3. Slipper seal 2. Shaft 4. Cover Unit: mm Check item Criteria Remedy Standard size Standard Clearance Clearance limit Clearance between rotor Replace and shaft ø 0.055 - 0.085 0.090 10-61 PC58UU-3...

  • Page 105: Travel Motor

    STRUCTURE, FUNCTION AND MAINTENANCE STANDARD TRAVEL MOTOR TRAVEL MOTOR A: From travel control valve B: From travel control valve D: To hydraulic tank P: From travel 2nd speed selector solenoid valve 10-62 PC58UU-3...
  • Page 106 12. Drive gear 24. Check valve 25. End cover SPECIFICATION Type : GMO6VN Theoretical delivery (Hi) : 15.3 cm³/rev {15.3 cc/rev} (Lo) : 26.4 cm³/rev {26.4 cc/rev} Speed change pressure : 1.96 - 4.41 MPa{20-45 kg/cm²} Reduction ratio : 57.9 10-63 PC58UU-3...
  • Page 107 (2). • To change the travel speed, the pressurized oil in the control chamber a is sent to the reg- ulator piston (3) to maximize or minimize the angle of the swash plate (1). 10-64 PC58UU-3...
  • Page 108 Then, the main pressurized oil from the cylin- der c chamber pushes the swash plate (7) in the direction to maximize the swash plate angle and the motor capacity is increased to the maximum for slow speed travel. 10-65 PC58UU-3...
  • Page 109 (6) in the left direction. • Then, the swash plate (7) is pressed in the direction to minimize the swash plate angle, and the motor capacity is minimized for high speed travel. 10-66 PC58UU-3...
  • Page 110 Since the PA and E ports are connected to each other at this time, too, the pressurized oil moves the parking brake piston (4) to release the parking brake. 10-67 PC58UU-3...
  • Page 111 PA and MA ports are opened to prevent cavi- pressure on the inlet side are balanced with tation. the pressure in the MB port on the outlet side and the outlet circuit is closed to control the speed according to the pump discharge. 10-68 PC58UU-3...
  • Page 112 (3) and disc (4) is lost and right. the plate (3) and disc (4) are separated to As a result, plate (3) and disc (4) are pressed release the brake. against each other and the brake works. 10-69 PC58UU-3...

  • Page 113: Swing Motor

    Theoretical delivery: 16.1 cc/rev To tank Rated speed: 2,100 rpm MA: From control valve Rated flow capacity: 33.8 /min MB: From control valve Safety valve set pressure: 20.6 MPa {210 kg/cm²} Suction valve cracking pressure: 0.044 MPa {0.45 kg/cm²} 10-70 PC58UU-3...
  • Page 114 1.96 N 1.47 N 12.6 x 6.5 10.5 — deformations {0.2 kg} {0.15 kg} are found 3.43 N 2.55 N Valve return spring 13.0 x 6.5 — {0.35 kg {0.26 kg} 10-71 PC58UU-3...
  • Page 115 The resultant of this torque [T = Σ (F3 x ri)] • rotates the cylinder block (5) through the pis- ton. • Since the cylinder block (5) is coupled with the output shaft by means of spline, the out- put shaft revolves to transmit the torque. 10-72 PC58UU-3...
  • Page 116 While the safety valve is operating, the oil relieved from the safety valve and the oil from the S port are supplied through the CB check valve to the MB port to prevent cavita- tion at the MB port. 10-73 PC58UU-3...
  • Page 117 (13). Accordingly, the brake pis- the brake spring (13). Accordingly, the brake ton (12) moves down and the disc (14) and piston presses the disc (14) and plate (15) to plate (15) are separated to release the brake. apply the brake. 10-74 PC58UU-3...
  • Page 118 B port but flows into the C path. Since the oil path is throttled by the orifice (ø 0.4) of the hydraulic timer valve (16), however, the oil in the a chamber flows at a very low rate. Accordingly, the swing brake delays working for a certain time. 10-75 PC58UU-3...
  • Page 119 (3) because the passage through which the oil escapes to the S port is throttled with the ball (2). • So, the relief pressure will rise slowly from P1 to P2 until the seat (1) comes to the sleeve (5). 10-76 PC58UU-3...

  • Page 120: Travel Ppc Valve

    STRUCTURE, FUNCTION AND MAINTENANCE STANDARD TRAVEL PPC VALVE TRAVEL PPC VALVE P : From main pump P3: R.H. reverse P1: L.H. reverse P4: R.H. forward P2: L.H. forward T : To tank 10-77 PC58UU-3...
  • Page 121 16.7 N 13.7 N 26.56 x 8.15 24.9 — deformations {1.7 kg} {1.40 kg} are found 146.4 N 117.7 N Centering spring 52.06 x 15.5 30.25 — {14.94 kg {12.0 kg} 10-78 PC58UU-3...
  • Page 122 • As a result, the operation valve spool moves to the position where the pressure of chamber A (the same as P1 port pressure) is balanced against the force of the operation valve spool return spring. 10-79 PC58UU-3...
  • Page 123 A via port P1 to push the operation valve spool. • Return oil from chamber B is conducted from port P2 to the drain chamber D via fine control hole f'. 10-80 PC58UU-3...

  • Page 124: Ppc Valve

    FOR WORK EQUIPMENT AND SWING P : From PPC lock valve P3: Left; Swing to left/Right; Bucket CURL P1: Left; Arm OUT/Right; Boom LOWER P4: Left; Swing to right/Right; Bucket DUMP P2: Left; Arm IN/Right; Boom RAISE T : To tank 10-81 PC58UU-3...
  • Page 125 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD PPC VALVE Spool 5. Disk 9. Retainer 2. Metering spring 6. Nut (for linking the lever) 10. Body 3. Centering spring Joint 11. Filter 4. Piston 8. Plate 10-82 PC58UU-3...
  • Page 126 Centering spring 17.7 N 14.1 N 42.5 x15.5 34.0 — are found (for P1 and P2 ports) {1.8 kg {1.44 kg} 16.7 N 13.3 N Metering spring 26.5 x 8.20 24.9 — {1.70 kg} {1.36 kg} 10-83 PC58UU-3...
  • Page 127 As a result, the operation valve spool is moved up to the position where pressure in chamber A (the same pressure level as that on port P1) and force of the operation valve spool return spring is balanced. 10-84 PC58UU-3...
  • Page 128 A via port P1 to push the operation valve spool. • Return oil from chamber B is conducted from port P2 to drain chamber D via the fine con- trol hole f’. 10-85 PC58UU-3...
  • Page 129 FOR SERVICE 1. Spool 2. Metering spring 3. Centering spring 4. Piston 5. Lever 6. Plate 7. Retainer 8. Body 9. Filter P : From main pump P1: To service valve P2: To service valve T : To tank 10-86 PC58UU-3...
  • Page 130 125 N 100 N 33.9 x 15.3 28.4 — deformations {12.7 kg} {10.2 kg} are found 16.7 N 13.3 N Metering spring 22.7 x 8.10 22.0 — {1.70 kg} {1.36 kg} 10-87 PC58UU-3...
  • Page 131 • As a result, the operation valve spool moves to the position where pressure of chamber A (the same as port P1 pressure) is balanced against the force of the operation valve spool return spring. 10-88 PC58UU-3...
  • Page 132 A via port P1 to push the operation valve spool. • Return oil from chamber B is conducted from port P2 to the drain chamber D via the fine con- trol hole f'. 10-89 PC58UU-3...

  • Page 133: Hydraulic Cylinder

    STRUCTURE, FUNCTION AND MAINTENANCE STANDARD HYDRAULIC CYLINDER HYDRAULIC CYLINDER BOOM CYLINDER ARM CYLINDER BUCKET CYLINDER 10-90 PC58UU-3...
  • Page 134 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD HYDRAULIC CYLINDER OFFSET CYLINDER BLADE CYLINDER 10-91 PC58UU-3...
  • Page 135 1.42 ± 0.14 kNm {145 ± 14.5 kgm} (width across flats 55mm) tightening torque Offset 1.42 ± 0.14 kNm {145 ± 14.5 kgm} (width across flats 55mm) Blade 1.42 ± 0.14 kNm {145 ± 14.5 kgm} (width across flats 55mm) 10-92 PC58UU-3...

  • Page 136: Solenoid Valve

    STRUCTURE, FUNCTION AND MAINTENANCE STANDARD SOLENOID VALVE SOLENOID VALVE 10-93 PC58UU-3...
  • Page 137 11. Return spring 12. Guide 13. Valve spool 14. Push pin 15. Coil (proportional type) Check valve 16. Plug 17. Spring 18. Ball Control relief valve 19. Adjustment screw 20. Shim 21. Locknut 22. Return spring 23. Valve spool 10-94 PC58UU-3...
  • Page 138 As a result, pilot oil pressure is conducted from port A through the spool (2) and port B up the actuator. At the same time, port T is closed, thereby blocking flow of oil to the hydraulic oil tank. 10-95 PC58UU-3...
  • Page 139 As a result, port A is closed, thereby stopping flow of oil pressure from PPC valve to the opera- tion valve. At the same time, oil from the operation valve is conducted to port B through port T and finally drained to the tank. 10-96 PC58UU-3...
  • Page 140 (1) and pressure on port B may be balanced. • Circuit pressure between PPC valve and oper- ation valve is , as seen above, adjusted in pro- portion to the magnitude of the signal current. 10-97 PC58UU-3...
  • Page 141 A port pushes spool (1) and its reaction force compresses spring (2) to move the spool (1) to the right and open the A and T ports to relieve the oil. Set pressure: 2.9 MPa {30 kg/cm²} 10-98 PC58UU-3...

  • Page 142: Multi Control Valve

    STRUCTURE, FUNCTION AND MAINTENANCE STANDARD MULTI CONTROL VALVE MULTI CONTROL VALVE (1) JIS pattern (2) J/D pattern Operation pattern selection drawing (The port names correspond to the symbols in the drawing). 10-98-1 PC58UU-3...

  • Page 143: Work Equipment

    STRUCTURE, FUNCTION AND MAINTENANCE STANDARD WORK EQUIPMENT WORK EQUIPMENT 10-99 PC58UU-3...
  • Page 144 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD WORK EQUIPMENT 10-100 PC58UU-3...
  • Page 145 -0.230 -0.065 bushing Clearance between arm and -0.170 -0.012 ø45 bucket mounting pin and 0.105 - 0.218 -0.230 -0.065 bushing Clearance between blade and -0.025 +0.142 ø35 track frame mounting pin and 0.105 - 0.229 -0.087 +0.080 bushing 10-101 PC58UU-3...
  • Page 146 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD WORK EQUIPMENT DIMENSION OF WORK EQUIPMENT 1. Arm 10-102 PC58UU-3...
  • Page 147 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD WORK EQUIPMENT Unit: mm PC58UU-3 Tolerance Standard Measuring position size Shaft Hole -0.025 -0.100 — ø50 -0.064 Arm side 66.5 Cylinder head side -0.5 -0.025 +0.100 — ø50 -0.064 -0.5 Boom side -1.0 -0.5 Arm side -1.0...
  • Page 148 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD WORK EQUIPMENT 2. Bucket Unit: mm PC58UU-3 Measuring position Standard size Tolerance — 246.9 ±0.5 — ±0.5 — 736.3 — — — — — — 30° — — 30° — — 13.5 — — —...

  • Page 149: Air Conditioning Piping

    AIR CONDITIONING PIPING Hot water take-off piping 2. Hot water return piping 3. Refrigerant piping 4. Receiver dryer 5. Condenser 6. Air conditioner compressor Air conditioner unit 8. Duct A: Inner air circulation hole B: Hot air/cold air spurting hole 10-105 PC58UU-3...

  • Page 150: Engine Control

    11. Fuel adjust dial 12. Fuel adjust motor 13. One-touch deceleration switch 14. One-touch deceleration pilot lamp 15. Fuel adjust motor relay (for drive) 16. Fuel adjust motor relay (for acceleration) 17. Fuel adjust motor relay (for deceleration) 10-106 PC58UU-3...
  • Page 151 (11). ENGINE STOP • If you shift the starter switch (2) to the OFF position, the engine stop solenoid (4) drives the governor stop lever to the STOP position to stop the engine. 10-107 PC58UU-3...

  • Page 152: Electrical Control System

    STRUCTURE, FUNCTION AND MAINTENANCE STANDARD ELECTRICAL CONTROL SYSTEM ELECTRICAL CONTROL SYSTEM OVERALL SYSTEM DIAGRAM 10-108 PC58UU-3...
  • Page 153 27. Offset potentiometer 28. Arm potentiometer 29. Reset terminal 30. Engine 31. Engine speed sensor 32. Main pump 32a.Servo valve 32b.LS valve 32c.PC valve 33. Control valve 33a.Merged valve 34. Travel PPC oil pressure switch 35. Travel alarm 10-109 PC58UU-3...
  • Page 154 5. Emergency pump driving switch 6. Resistor 7. TVC-EPC valve 8. Main pump 8a. Servo valve 8b. LS valve 8c. PC valve 9. Engine speed sensor 10. Engine 11. Control valve 11a.Work equipment control valve 11b.Merged valve 11c.Travel control valve 10-110 PC58UU-3...
  • Page 155 If normal operation of the pump becomes unavailable due to failure of the controller, fix the situation temporarily and resume opera- tion by operating the emergency pump drive switch. (1) In normal operation. (2) When a failure occurs. 10-111 PC58UU-3...
  • Page 156 (2). d. Solenoid valve driving signal • The controller senses that the travel lever is e. Travel PPC oil pressure switch signal operated and then sends the signal to the travel Travel alarm actuation signal alarm to sound. 10-112 PC58UU-3...
  • Page 157 9. L.H. PPC valve equipment operation lever. 10. R.H. PPC valve 11. Travel PPC valve 12. Offset PPC valve 13. Engine 14. Main pump Input/output signal a. Controller power supply b. Solenoid power supply c. Solenoid valve driving signal 10-113 PC58UU-3...

  • Page 159: Electrical System

    Cancelling function Reset function Depth-from-ground-surface display function Depth measurement system Electrical system Depth-from-datum-plane display function Automatic boom/arm stop system Height setup function Boom end cushioning Arm end cushioning Error code display/alarm function Self-test function Error code memory function 10-115 PC58UU-3...
  • Page 160 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD ELECTRICAL SYSTEM SYSTEM DIAGRAM 10-116 PC58UU-3...
  • Page 161 Reset power supply 21. PPC lock switch x. Reset signal (side) 22. Neutral engine start relay (for PPC lock) y. Reset signal (forward) 23. PPC lock solenoid valve 24. Engine 25. Main pump 26. Control valve 26a.Merged valve 10-117 PC58UU-3...
  • Page 162 In this case, work equipment, swing and travel operation can be resumed by turning on the emergency work equipment operation switch. 10-118 PC58UU-3...
  • Page 163 B. Emergency stop/alarm point B1: 50 mm B2: 50 mm C. Stop/alarm point C1: 200 mm C2: 150 mm D. Reduction start point D1: 700 mm E. Emergency stop zone F. Stop zone G. Reduction zone H. Safety zone 10-119 PC58UU-3...
  • Page 164 PPC valve. Thus, every operation using the PPC circuit will be disabled. # When this function has been turned on, you need to resort to the cancel function for the recovery. See the "Cancel Function" in Section 10-120 PC58UU-3...
  • Page 165 # The emergency work equipment operation switch (S) is an auto-return type. Namely, if you move your hand off the switch in the "In emergency (2)" position, it will automatically return to the "Normal (1)" position. 10-121 PC58UU-3...
  • Page 166 • This function can also be used for correct- ing the stop position when an optional narrower or wider bucket is used. 10-122 PC58UU-3...
  • Page 167 The system will display an application error code on the depth indicator to urge the operator to retry the reset function. # For detailed procedures for resetting, refer to the "Checkups and Adjustment" section. 10-123 PC58UU-3...
  • Page 168 If the bucket is in any other position, discrep- ancy (E) can result from the displayed and actual depth. If you select the Depth-from-Datum-Plane Dis- play Function, this function will be cancelled. 10-124 PC58UU-3...
  • Page 169 D : Depth from the datum plane. Ya : Depth from the boom foot to the ground level (constant) Yb : Depth from the boom foot to any datum plane selected Yc : Depth from the boom foot to the measurement level 10-125 PC58UU-3...
  • Page 170 B: Setup angle C: Operation possible zone D: Operation impossible zone • Shift the mode switch to the “Height”. • Turn the setup switch to the “CLEAR” posi- tion, then make sure that the indicator lamp is turned off. 10-126 PC58UU-3...
  • Page 171 2. Error code memory function • If the advanced system has any trouble, it executes the self-diagnosis and stores the error code. • For further information on the display, reset, etc., refer to the "Checkups and Adjustment" section. 10-127 PC58UU-3...
  • Page 172 Turning OFF pressure: 294±49.0 kPa {3.0±0.5 kg/cm²} Operation • Five switches of this type are attached to the operation valves. These switches sense accuation of respective accuators by the pressure of the PPC valve, and send the signal to the controller. 10-128 PC58UU-3...
  • Page 173 CONTROLLER Model selection table Set/clear selection table CN-G2, 37P CN-G2, 27P CN-G2, 7P CN-G2, 16P CN-G2, 2P CN-G2, 38P PC58UU-3 Clear Attachment selection table CN-G1, 17P CN-G1, 11P CN-G2, 17P Deceleration motor installation signal Standard arm CN-G2, 6P Long arm...
  • Page 174 Governor motor relay (for deceleration) Output TVC solenoid valve Output — Swing and travel alarm Output Arm crane relay Output Governor motor relay (for drive) Output PPC lock solenoid valve Output Acceleration signal Input Auto-deceleration signal Input — — 10-130 PC58UU-3...
  • Page 175 • Using the resistance value of the variable resistor, potentiometers send angle data to the controller by converting the supply volt- age (5V) into signal voltage according to the angle of the work equipment. 10-131 PC58UU-3...
  • Page 176 "ON". Boom RAISE stop EPC valve Arm IN stop EPC valve Offset left stop solenoid valve PPC lock solenoid valve 2nd speed travel selector solenoid valve (See the "(EPC) solenoid valve".) "See the Monitor panel". 10-132 PC58UU-3...

  • Page 177: Monitor System

    MONITOR SYSTEM MONITOR SYSTEM • This system monitors the machine status using sensors installed on various parts of the machine, processes the monitoring data and displays the current machine status on the panel for the operator to view. 10-133 PC58UU-3...
  • Page 178 Strobe Input Charge volume Input — Electric system signal Input GND (CWT.) — Serial lock Input Start signal Input Preheat Input Coolant temperature Input Caution Input Fuel level Input Alarm buzzer Output Serial data Input Nighttime lighting Input 10-134 PC58UU-3...
  • Page 179 When normal: Goes off. When below When abnormal: Lights up. specified (If trouble occurs while engine is running, buzzer Engine oil pressure sounds.) pressure 49 kPa (0.5 kg/cm²) ! For display and operation method marked with !, see "Advanced system" section. 10-135 PC58UU-3...
  • Page 180 3. Thermistor Function • The coolant temperature sensor is installed to the engine cylinder block. It senses the tem- perature change as a resistor change of the thermistor (3) and sends a temperature signal to the monitor panel. 10-136 PC58UU-3...
  • Page 181 The fuel level sensor is installed to the fuel tank. The float (1) moves up and down according to the fuel level. The float (1) oper- ates the variable resistor (4) through the arm (2) and sends a signal to the monitor panel. 10-137 PC58UU-3...
  • Page 183 When checking the engine coolant level, always wait for the water to cool down. If the radiator cap is removed when the water is still hot, the water will spurt out and causes burns. Be careful not to get caught in the fan, fan belt, or other rotating parts. 20-1 PC58UU-3...
  • Page 184 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR ENGINE STANDARD VALUE TABLE FOR ENGINE Serial No.: 20001 – 22000 Applicable model PC58UU-3 Engine 4D88E-3GB Standard value for new Item Measurement conditions Unit Service limit value machine High idling 2,550 ± 50 —...
  • Page 185 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR ENGINE Serial No.: 22001 and up Applicable model PC58UU-3 Engine 4D88E-5XBB Standard value for Item Measurement conditions Unit Service limit value new machine High idling 2,590 ± 50 — Engine Speed Low idling 1,200 ±...
  • Page 186 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR CHASSIS STANDARD VALUE TABLE FOR CHASSIS Applicable Model PC58UU-3 Cate- Standard value Service limit Item Measurement Conditions Unit gory for new machine value • Hydraulic oil temperature: 45 - 55°C At 1-pump relief Min.
  • Page 187 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR CHASSIS Applicable Model PC58UU-3 Cate- Standard value Service limit Item Measurement Conditions Unit gory for new machine value 15.7 ± 2.94 15.7 ± 2.94 Boom control lever {1.6 ± 0.3} {1.6 ± 0.3} 15.7 ±...
  • Page 188 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR CHASSIS Applicable Model PC58UU-3 Cate- Standard value Service limit Item Measurement Conditions Unit gory for new machine value Overrun when stop- Deg. 30 ± 5 Max. 40 ping swing • Engine at full throttle •...
  • Page 189 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR CHASSIS Applicable Model PC58UU-3 Cate- Standard value Service limit Item Measurement Conditions Unit gory for new machine value 28.8 ± 2 28.8 ± 4 (26.7 ± 2) (26.7 ± 4) Travel speed Sec.
  • Page 190 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR CHASSIS Applicable Model PC58UU-3 Cate- Standard value Service limit Item Measurement Conditions Unit gory for new machine value Total work equipment (hydraulic drift Max. 300 Max. 450 at tip of bucket teeth) Boom cylinder (amount of Max.
  • Page 191 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR CHASSIS Applicable Model PC58UU-3 Cate- Standard value Service limit Item Measurement Conditions Unit gory for new machine value 3.7 ± 0.4 Max. 4.3 Offset cylinder fully retracted ↕ Fully extended 3.7 ± 0.4 Max.
  • Page 192 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR CHASSIS Applicable Model PC58UU-3 Cate- Standard value Service limit Item Measurement Conditions Unit gory for new machine value Bucket Max. 1 • Engine at low idling • Hydraulic oil temperature: 45 - 55°C •...
  • Page 193 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR CHASSIS Applicable Model PC58UU-3 Cate- Standard value Service limit Item Measurement Conditions Unit gory for new machine value • Hydraulic oil temperature: 45 - 55°C l l l l • Engine at rated speed...
  • Page 194 If the condition is within the range shown in the switch OFF . table below, it is normal. 2) Insert T-adapter 4.9 ~ 5.1V Between Boom potenti- Measure 3) Turn starting ometer voltage switch ON. Between 0.5 ~ 0.9V 4) Raise boom to stroke end. 20-11 PC58UU-3...
  • Page 195 If the condition is within the range shown in the 1) Turn starting table below, it is normal. switch OFF . 2) Disconnect Ω Boom RAISE stop Measure Between F11(male) ~ F11(female) 3 ~ 15 connector. EPC valve resistance Ω Between F11 ~ chassis Min. 1M 20-12 PC58UU-3...
  • Page 196 OFF . 2) Disconnect When pedal is in Ω connector. Min. 1M (Male) neutral Travel speed rais- Measure When pedal is Ω Max. 1 ing switch resistance pressed (Male) Ω — Min. 1M ~ chassis 20-13 PC58UU-3...
  • Page 197 Check and cau- tion section Charge level Lamp ON Max. 5V Start engine. Lamp OFF 10 ~15V Preheating Lamp ON 10 ~15V Stop engine. Lamp OFF Max. 1V Electric system Lamp ON 8 ~15V — Lamp OFF Max. 1V 20-14 PC58UU-3...
  • Page 198 While engine is running (½ throttle or higher) 1) Start engine. Between 13.5 ~ 14.5V alternator L Measure Alternator If battery is deteriorated or machine is used in voltage terminal ~ cold district, voltage may not rise for a while chassis after engine is started. 20-15 PC58UU-3...
  • Page 200 Releasing residual pressure from hydraulic circuit ..................20-128 Releasing residual pressure from hydraulic tank ..................20-128 Pressurizing hydraulic tank ......................... 20-128 Resetting procedure of electric system and check of its operation ............. 20-129 Procedure for replacing potentiometer......................20-142 Procedure for testing diode ......................... 20-143 20-101 PC58UU-3...

  • Page 201: Tools For Testing, Adjusting, And Troubleshooting

    799-601-9030 For DT3 • 799-601-9040 For DT4 • 799-601-9050 Adapter For DT6 • 799-601-9010 For DTM2 • 799-601-9170 For DT8B • 799-601-9120 For DT12B • 6 799-601-9350 Adapter For DRC23-40 Measuring wear of sprocket 796-127-1140 Wear gauge • 20-102 PC58UU-3...

  • Page 202: Measuring Engine Speed

    For the pumps to be relieved, see the STAN- 2. Install oil pressure gauge C1 (2.5 MPa {25 kg/ DARD VALUES TABLE. 3. Run the engine and measure the oil pressure at low idling and high idling. 20-103 PC58UU-3...

  • Page 203: Measuring Compression Pressure

    For details. see DISSASSEMBLY AND ASSEMBLY, Removal of nozzle holder assem- bly. 4. Install adapter D2 to the nozzle holder mounting part and connect compression gauge D1. Serial No.: 22001 and up 20-104 PC58UU-3...

  • Page 204: Adjusting Valve Clearance

    (3) and turn adjustment screw (4) to the degree that tool E will be move lightly, then tighten locknut (5). Locknut: 25.48 ± 2.94Nm{2.6 ± 0.3kgm} # After tightening the locknut, check valve clear- ance a again. 20-105 PC58UU-3...

  • Page 205: Testing And Adjusting Fuel Injection Timing

    (3). • Since the injection timing is earlier than the standard, loosen injection pump mounting nuts (4) and lean the pump toward the engine. a Adjust until the timing mark is matched to the given injection timing mark. 20-106 PC58UU-3...
  • Page 206 1. Befor romoving fuel injection pump (2), remove the cover in front of the timing gear case and make match marks on the meshing parts of pump drive gear (3) and idle gear (4). 20-106-1 PC58UU-3...
  • Page 207 2.5 mm while the fuel injection pump unit is driven with a motor. Actual injection angle i is measured for each fuel injection pump and recorded on the pump body. 20-106-2 PC58UU-3...

  • Page 208: Testing And Adjusting Alternator Belt Tension

    4. Tighten adjustment bolt (2) and alternator mount- 3. Using a bar, etc., move alternator outward to ing bolt (1) in order. adjust the belt tension. 4. Tighten adjustment bolt (2) and alternator mount- ing bolt (1) in order. 20-107 PC58UU-3...

  • Page 209: Adjusting Fuel Control Linkage

    (1) against stopper (6) on the FULL side. 6) Retighten nuts (3) and (4). 7) Start the engine and check that it runs at the specified speed. Serial No.: 20001 – 22000 Serial No.: 22001 – 20-107-1 PC58UU-3...

  • Page 210: Measuring Exhaust Color

    The pressure of the air supply should be less than 1.47 MPa {15 kg/cm²}. 3) Connect the power cord to the AC socket. When connecting the cord, check that the power switch of the smoke meter is OFF. 20-108 PC58UU-3...

  • Page 211: Testing Clearance Of Swing Circle Bearing

    If the dial gauge does not indicate At this time, the front part of the upper structure zero, repeat Steps 2 – 5. lowers and the rear part rises. 3. Set the dial gauge to the zero point. 20-108-1 PC58UU-3...

  • Page 212: Checking Wear Of Sprocket

    # If the wave shape of the sprocket is above the wear limit line: It is possible to continue to use the sprocket. # If the wave shape of the sprocket has reached the wear limit line: Replace the sprocket with a new part. 20-109 PC58UU-3...

  • Page 213: Testing And Adjusting Track Shoe Tension

    2) To check that the track shoe tension is nor- mal, run the engine at low idling and move the machine forward by the length of track on the ground and stop slowly. 3) Test the track shoe tension again. If it is still abnormal, adjust again. 20-110 PC58UU-3...

  • Page 214: Adjusting Brade Control Lever

    4. Loosen and retract stopper bolts (1) to the end. 5. Move blade control lever (2) to the front and rear stroke ends and adjust stopper bolts (3) so that they will come in contact with blade control lever at each stroke end, then tighten the locknuts. 20-111 PC58UU-3...

  • Page 215: Testing And Adjusting Hydraulic Pressure In Work Equipment, Swing, And Travel Circuits

    2) Run the engine at full throttle and relieve the travel pump and measure the oil pres- sure at this time. Put block against the grouser of the track shoe or put block between the sprocket and frame to lock the track shoe. 20-112 PC58UU-3...
  • Page 216 3) Run the engine at full throttle and relieve the swing circuit and blade circuit and mea- sure the oil pressure at this time. Stop swinging securely by using the work equipment. Move the blade cylinder to the stroke end. 20-113 PC58UU-3...

  • Page 217: Testing And Adjusting Ls Differential Pressure

    # Use and oil pressure gauge having the minimum division of 0.98 MPa {10 kg/ cm²}. 3) Run the engine at full throttle and measure the pump discharge pressure under the condition in above. # Read the gauge pointer correctly from its front side. 20-114 PC58UU-3...

  • Page 218: Adjusting Pc Valve

    # When loosening or tightening the lock- adjusting. nut, secure adjustment screw (4) with a spanner so that it will not be dragged. 2. After adjusting, tighten locknut (1). Locknut: 27.4 ~ 34.3 Nm {2.8 ~ 3.5 kgm} 20-115 PC58UU-3...

  • Page 219: Testing And Adjusting Hydraulic Pressure In Control Pump Circuit

    2. Install nipple C2 and oil pressure gauge C1 (5.9 MPa {60 kg.cm²}). 3. Run the engine at full throttle and set the con- trol lever in neutral and measure the oil pres- sure. 20-116 PC58UU-3...

  • Page 220: Measuring Solenoid Valve Output Pressure

    # The pressure in hose (2) can also be mea- sured on the travel motor side. # If the output pressure is measured when the boom is raised or the arm is moved IN to the stroke end, it is lower than the normal value. 20-117 PC58UU-3...
  • Page 221 5) Boom RAISE stop EPC valve: Perform the boom RAISE operation. # Perform the offset LEFT stop, arm IN stop, and boom RAISE stop operations in the safety region where the interfer- ence prevention function does not work. 20-118 PC58UU-3...

  • Page 222: Measuring Ppc Valve Output Pressure

    # For the hose to be disconnected, see hydraulic circuit diagram on the next page. 2. Install nipple C4 (including the O-ring and plug) and C3 (including O-ring), then install oil pres- sure gauge C1 (5.9 MPa {60 kg/cm²}). 20-119 PC58UU-3...
  • Page 223 MEASURING PPC VALVE OUTPUT PRESSURE TESTING AND ADJUSTING ADJUSTING PC VALVE PPC VALVE AND SWING HOLDING BRAKE CIRCUIT 20-120 PC58UU-3...

  • Page 224: Adjusting Ppc Valve

    3. Run the engine at full throttle and perform the [LEFT swing] and [RIGHT swing] operations and measure the inlet pressure. # The standard values are the same as those in the control circuit (when the control lever is moved to the stroke end). 20-121 PC58UU-3...

  • Page 225: Testing And Adjusting Travel Deviation

    2) Travel for 10m, then measure dimension a for the next 20m when traveling with the engine at full throttle. # Measure at full throttle. # Install an oil pressure gauge and mea- sure the pump discharge pressure at the same time. 20-122 PC58UU-3...
  • Page 226 2. Insert hexagonal wrench (Width across flats: 4 mm) in adjustment plug (1) or (2). # Insert hexagonal wrench securely. 3. Loosen locknut (3) with the hexagonal wrench inserted. # Before adjusting, mark the position of the locknut with paint. 20-123 PC58UU-3...

  • Page 227: Measuring Oil Leakage From Work Equipment Cylinder

    Boom cylinder: Hose (1) • Arm cylinder: Hose (2) • Bucket cylinder: Hose (3) • Offset cylinder: Hose (4) Take care not to disconnect the hose from the cylinder bottom. MEASURING POSITION OF BOOM CYLINDER MEASURING POSITION OF ARM AND BUCKET 20-124 PC58UU-3...
  • Page 228 # Boom cylinder: RAISE operation Arm cylinder: IN operation Bucket cylinder: CURL operation Offset cylinder: LEFT offset operation 4. After 30 seconds, measure the quantity of oil leaking in 1 minute. 20-125 PC58UU-3...

  • Page 229: Bleeding Air From Each Part

    8.8 ± 1 Nm {0.9 ± 0.1 kg/cm²} # Caution for starting engine After the above work, run the engine at low idling for about 10 minutes. After that, keep engine speed at middle range or below for about 1 hour. 20-126 PC58UU-3...
  • Page 230 2) Pressurize the hydraulic tank. For details, see Pressurizing Hydraulic Tank. 3. Bleeding air from swing motor 1) Run the engine at slow speed and swing to the left 3 times. 2) Swing to the right 3 times. 20-127 PC58UU-3...

  • Page 231: Releasing Residual Pressure From Hydraulic Circuit

    Lower the work equipment to the ground and stop the engine. 2. Loosen the oil filler cap or oil filler plug of the hydraulic tank gradually to release the residual pressure from the tank. 20-128 PC58UU-3...

  • Page 232: Resetting Procedure Of Electric System And Check Of Its Operation

    6 Reset Reset automatic automatic stop Error Error stop output output signal signal Automatic Automatic stop position stop position is in specified is in specified range range Move bucket to right and left to check automatic stop position 20-129 PC58UU-3...
  • Page 233 Wiring Connector Connector No. Tape color Type of plug harness color : Power Without color source Female tape (12V) Without color : Resetting 1 Yellow/White Male tape : Resetting 2 Yellow Green/White Male 20-130 PC58UU-3...
  • Page 234 # The reset power source terminal (1) is a female plug (red wiring harness) and the input reset terminal (2) is a male plug (yellow/white wiring harness with- out tape). 20-131 PC58UU-3...
  • Page 235 OFF position with the error code left dis- played and the starting switch is turned to the ON position again, the currently saved input signal is deleted. Accordingly, remove the all factors of the error code, then reset securely. 20-132 PC58UU-3...
  • Page 236 Check that the potentiometer case input signal (voltage) is in the standard range. # For standard range, see 1) above. # The boom potentiometer cannot be adjusted with the rod. They must be controlled with the controller. 20-133 PC58UU-3...
  • Page 237 L between the tip of the bucket teeth and the cab is within specified range. Specified value: 260 -- 300 mm After carrying out the automatic stop, if the bucket is not horizontal, make it hor- izontal, then carry out the measure- ment. 20-134 PC58UU-3...
  • Page 238 7) When the starting switch is turned ON again, the resetting operation is completed. 8) After finishing the operation, tape the reset terminals to their original positions. 3) Turn the starting switch OFF and stop the engine, then turn the starting switch ON again. 20-135 PC58UU-3...
  • Page 239 7) When the starting switch is turned ON again, the resetting operation is completed. 8) After finishing the operation, tape the reset terminals to their original positions. 3) Turn the starting switch OFF and stop the engine, then turn the starting switch ON again. 20-136 PC58UU-3...
  • Page 240 # If the above resetting operation causes any problem with normal operations, carry out the resetting operation again from "1. Reset potentiometer input signal". # If an abnormality display appears during the resetting operation, remove all the causes, then reset the system properly. 20-137 PC58UU-3...
  • Page 241 (yellow/white wiring harness without tape). 8) Repeat Steps 3) to 5). 9) Turn the starting switch OFF , the ON again to complete the resetting operation. 10) After finishing the operation, tape the reset terminals to their original positions. 20-138 PC58UU-3...
  • Page 242 Check that the depth display changes to [0.0] when this is done. ii) Lower the bucket to the ground and check that the depth display changes to [1.0]. iii) Turn the setting switch to the CLEAR position to cancel the setting. 20-139 PC58UU-3...
  • Page 243 Lower the boom, then run the engine at full throttle and operate the lever fully to raise the boom, and check that it stops at the original position. iii) Turn the setting switch to the CLEAR position to cancel the setting. 20-140 PC58UU-3...
  • Page 244 6) When the starting switch is turned ON again, the resetting operation is completed. # Run the engine at full throttle, carry out the automatic stop and check stopping distance L. 7) After finishing the operation, tape the reset terminals to their original position. 20-141 PC58UU-3...

  • Page 245: Procedure For Replacing Potentiometer

    Remove potentiometers (1), (2), and (3) from the potentiometers, referring to "Procedure the work equipment and install new ones. for resetting input and output signals of electric system". • Boom potentiometer: (1) • Arm potentiometer: (2) • Offset potentiometer: (3) 20-142 PC58UU-3...

  • Page 246: Procedure For Testing Diode

    (Note). • The value is 0 or near 0: Short circuit inside diode. Note) If the diode is a silicon diode, the tester indicates a value between 400 and 600. Testers of certain kinds indicate 0.4 - 0.6. 20-143 PC58UU-3...
  • Page 248 METHOD OF USING JUDGEMENT TABLE....................20-258 METHOD OF USING TROUBLESHOOTING CHARTS ................20-259 TROUBLESHOOTING OF ELECTRICAL SYSTEM (E-MODE) ..............20-301 TROUBLESHOOTING OF TRANSMISSION CONTROLLER SYSTEM (F-MODE)........20-401 TROUBLESHOOTING OF HYDRAULIC MECHANICAL SYSTEM (H-MODE).......... 20-501 TROUBLESHOOTING OF MAIN MONITOR SYSTEM (M-MODE)............20-601 20-201 PC58UU-3...

  • Page 249: Troubleshooting Points To Remember

    To prevent a repeat failure, 2) Check for andy external oil leakage from the always investigate problem piping or hydraulic equipment. occurred and then remove or repair the cause. 20-202 PC58UU-3...

  • Page 250: Sequence Of Events In Troubleshooting

    TROUBLESHOOTING SEQUENCE OF EVENTS IN TROUBLESHOOTING SEQUENCE OF EVENTS IN TROUBLESHOOTING 20-203 PC58UU-3...
  • Page 251 The pins of the male and female connectors are in contact at the crimped terminal or sol- dered portion, but if there is excessive force brought to bear on the wiring, the plating at the joint will peel and cause improper con- nection or breakage. 20-204 PC58UU-3...
  • Page 252 If there is oil or water in the compressed air, the contacts will become even dirtier, so remove the oil and water from the compressed air completely before clean- ing with compressed air. 20-205 PC58UU-3...
  • Page 253 If the machine is left disassembled for a long time, it is particularly easy for im- proper contact to occur, so always cover the connector. 20-206 PC58UU-3...
  • Page 254 Since the DT 8-pole and 12-pole DT type con- nectors have 2 latches respectively, push them in until they click 2 times. 1. Male connector, 2. Female connector • Normal locking state (Horizontal): a, b, d • Incomplete locking state (Diagonal): c 20-207 PC58UU-3...
  • Page 255 After drying, leave the wiring harness discon- nected and carry out a continuity test to check for any short circuits between pins caused by water. After completely drying the connector, blow it with contact restorer and reas- semble. 20-208 PC58UU-3...
  • Page 256 4) When carrying out troubleshooting of circuits (measuring the voltage, resistance, continuity, or current), move the related wiring and connectors several times and check that there is no change in the reading of the tester. If there is any change, there is probably defective contact in that circuit. 20-209 PC58UU-3...
  • Page 257 If an oil cleaning device is used, it is possible to filter out the dirt that has collected during storage, so this is an even more effective method. 20-210 PC58UU-3...
  • Page 258 The oil cleaning equipment is used to remove the ultrafine (about 3µ) particles that the filter built into the hydraulic equipment cannot remove, so it is an extremely effective device. 20-211 PC58UU-3...

  • Page 259: Checks Before Troubleshooting

    Check, repair or above) (If the battery charge is low, the voltage may be 13.5 - 14.5 V replace approximately. 25V immediately after charging) 25. Sound of actuation of battery relay (when starting switch — Replace is turned ON/OFF) 20-212 PC58UU-3...

  • Page 261: Connector Types And Mounting Locations

    Fuel level sensor — For driving work equipment in emer- Outside optional power source gency PPC lock solenoid KES0 Washer tank — Travel speed solenoid Yazaki Horn LEFT offset stop solenoid Fusible link Arm IN stop EPC valve KES1 Alternator 20-214 PC58UU-3...
  • Page 262 (T-)F1 Terminal Starting switch (T-)F2 Terminal Starting switch (T-)F3 Terminal Starting switch (T-)F4 Terminal Starting switch (T-)F5 Terminal Starting switch (T-)F6 Terminal Starting switch (T-)M1 Terminal Battery (+) (T-)M2 Terminal Starting motor (B) (T-)M3 Terminal Starting motor (S) 20-215 PC58UU-3...
  • Page 263 — For driving work equipment in emer- Outside optional power source gency PPC lock solenoid KES0 Washer tank — Travel speed solenoid Yazaki Horn LEFT offset stop solenoid Fusible link SUMI Arm IN stop EPC valve Alternator TOMO 20-215-1 PC58UU-3...
  • Page 264 Starting switch (T-)M1 Terminal Battery (+) (T-)M2 Terminal Starting motor (B) (T-)M3 Terminal Starting motor (S) (T-)M4 Terminal Alternator (B) (T-)M5 Terminal Engine oil pressure switch (T-)M6 Terminal Air heater (T-)F7 Terminal Pump drive switch in emergency — 20-215-2 PC58UU-3...

  • Page 265: Connector Arrangement Diagram

    TROUBLESHOOTING CONNECTOR ARRANGEMENT DIAGRAM CONNECTOR ARRANGEMENT DIAGRAM Serial No.: 20001 — 22000 20-216 PC58UU-3...
  • Page 266 TROUBLESHOOTING CONNECTOR ARRANGEMENT DIAGRAM 20-217 PC58UU-3...
  • Page 267 TROUBLESHOOTING CONNECTOR ARRANGEMENT DIAGRAM 20-218 PC58UU-3...
  • Page 268 TROUBLESHOOTING CONNECTOR ARRANGEMENT DIAGRAM Serial No.: 22001 and up 20-218-2 PC58UU-3...
  • Page 269 TROUBLESHOOTING CONNECTOR ARRANGEMENT DIAGRAM 20-218-3 PC58UU-3...
  • Page 270 TROUBLESHOOTING CONNECTOR ARRANGEMENT DIAGRAM 20-218-4 PC58UU-3...

  • Page 271: Connection Table For Connector Pin Numbers

    • Quantity: 20 • Quantity: 20 • Terminal part no.: 79A-222-3380 • Terminal part no.: 79A-222-3410 • Electric wire size: 2.0 • Electric wire size: 2.0 — — • Grommet: red • Grommet: red • Quantity: 20 • Quantity: 20 20-219 PC58UU-3...
  • Page 272 Part No. 799-601-7050 Part No.: 08055- 10681 Part No.: Part No.: 08055- 10691 799-601-7060 Part No.: 08055-10881 Part No.: 08055- 10891 799-601-7310 Part No.: 08055- 11281 Part No.: 08055- 11291 799-601-7070 Part No.: 08055- 11481 Part No.: 08055-11491 20-220 PC58UU-3...
  • Page 273 • Quantity: 20 • Quantity: 20 • Terminal part no.: • Terminal part no.: • Electric wire size: 1.25 • Electric wire size: 1.25 — — • Grommet: red • Grommet: red • Quantity: 20 • Quantity: 20 20-221 PC58UU-3...
  • Page 274 Part No.: 08056-00181 799-601-7080 799-601-7090 Part No.: 08056-00271 Part No.: 08056-00281 799-601-7110 Part No.: 08056-00371 Part No.: 08056-00381 799-601-7120 Part No.: 08056-00471 Part No.: 08056-00481 799-601-7130 Part No.: 08056-00671 Part No.: 08056-00681 799-601-7340 Part No.: 08056-00871 Part No.: 08056-00881 20-222 PC58UU-3...
  • Page 275 Male (female housing) Female (male housing) Part No. 799-601-7140 Part No.: 08056-10871 Part No.: 08056-10881 799-601-7150 (white) Part No.: 08056-11071 Part No.: 08056-11081 799-601-7350 (white) Part No.: 08056-11271 Part No.: 08056-11281 799-601-7330 (white) Part No.: 08056-11671 Part No.: 08056-11681 20-223 PC58UU-3...
  • Page 276 CONNECTION TABLE FOR CONNECTOR PIN NUMBERS S-type connector T-adapter Male (female housing) Female (male housing) pins Part No. — (blue) — — 799-601-7160 (blue) Part No.: 08056-11272 Part No.: 08056-11282 799-601-7170 (blue) Part No.: 08056-11672 Part No.: 08056-11682 20-224 PC58UU-3...
  • Page 277 Housing part No.: 79A-222-2620 Housing part No.: 79A-222-2610 Qty.: 5 Qty.: 5 799-601-2950 Housing part No.: 79A-222-2660 Housing part No.: 79A-222-2650 Qty.: 5 Qty.: 5 799-601-2720 Housing part No.: 79A-222-2710 Housing part No.: 79A-222-2690 Qty.: 2 Qty.: 2 20-225 PC58UU-3...
  • Page 278 Housing part No.: 79A-222-2730 Housing part No.: 79A-222-2720 Qty.: 2 Qty.: 2 799-601-2740 Housing part No.: 79A-222-2750 Housing part No.: 79A-222-2740 Qty.: 2 Qty.: 2 Housing part No.: 79A-222-2770 Housing part No.: 79A-222-2760 — Qty.: 50 Qty.: 50 20-226 PC58UU-3...
  • Page 279 Housing part No.: 79A-222-3430 — Qty.: 5 799-601-7190 Housing part No.: 79A-222-3440 — Qty.: 5 799-601-7210 Housing part No.: 79A-222-3450 — Qty.: 5 799-601-7220 Housing part No.: 79A-222-3460 — Qty.: 5 #Terminal part No.: 79A-222-3470 (no relation with number of pins) 20-227 PC58UU-3...
  • Page 280 AMPO70-type connector No. of T-adapter pins Male (female housing) Female (male housing) Part No. 799-601-7510 — Part No.: 08195-10210 799-601-7520 — Part No.: 08195-12210 799-601-7530 — Part No.: 08195-14210 799-601-7540 — Part No.: 08195-18210 799-601-7550 — Part No.: 08195-20210 20-228 PC58UU-3...
  • Page 281 — — — PA type connector No. of T-adapter pins Male (female housing) Female (male housing) Part No. — — Bendix MS connector No. of T-adapter pins Male (female housing) Female (male housing) Part No. 799-601-3460 — — 20-229 PC58UU-3...
  • Page 282 08027-10270 (black) — Part No.: 08027-10310 Part No.: 08027-10360 — Part No.: 08027-10410 (natural color) Part No.: 08027-10460 (natural color) 08027-10420 (black) 08027-10470 (black) — Part No.: 08027-10610 (natural color) Part No.: 08027-10660 (natural color) 08027-10620 (black) 08027-10670 (black) 20-230 PC58UU-3...
  • Page 283 TROUBLESHOOTING CONNECTION TABLE FOR CONNECTOR PIN NUMBERS KES 1 (Automobile) connector No. of T-adapter pins Male (female housing) Female (male housing) Part No. — Part No.: 08027-10810 (natural color) Part No.: 08027-10860 (natural color) 08027-10820 (black) 08027-10870 (black) 20-231 PC58UU-3...
  • Page 284 TROUBLESHOOTING CONNECTION TABLE FOR CONNECTOR PIN NUMBERS Connector for relay (socket type) No. of T-adapter pins Male (female housing) Female (male housing) Part No. 799-601-7360 — — 799-601-7370 — — 20-232 PC58UU-3...
  • Page 285 TROUBLESHOOTING CONNECTION TABLE FOR CONNECTOR PIN NUMBERS F-type connector No. of T-adapter pins Male (female housing) Female (male housing) Part No. — — — 20-233 PC58UU-3...
  • Page 286 Pin (male terminal) Pin (female terminal) Part No.: 08191-21201, 08191-12202, Part No.: 08191-24101, 08191-24102 08191-21205, 08191-12206 08191-24105, 08191-24106 18-14 799-601-9220 Pin (female terminal) Pin (male terminal) Part No.: 08191-22201, 08191-22202, Part No.: 08191-23101, 08191-23102, 08191-22205, 08191-22206 08191-23105, 08191-23106 20-234 PC58UU-3...
  • Page 287 Part No.: 08191-32201, 08191-32202 Part No.: 08191-33101, 08191-33102 Pin (male terminal) Pin (female terminal) Part No.: 08191-41201, 08191-42202 Part No.: 08191-44101, 08191-44102 18-21 799-601-9240 Pin (female terminal) Pin (male terminal) Part No.: 08191-42201, 08191-42202 Part No.: 08191-43101, 08191-43102 20-235 PC58UU-3...
  • Page 288 Pin (male terminal) Pin (female terminal) Part No.: 08191-61201, 08191-62202 Part No.: 08191-64101, 08191-64102 08191-61205, 08191-62206 08191-64105, 08191-64106 24-16 799-601-9260 Pin (female terminal) Pin (male terminal) Part No.: 08191-62201, 08191-62202, Part No.: 08191-63101, 08191-63102, 08191-62205, 08191-62206 08191-63105, 08191-63106 20-236 PC58UU-3...
  • Page 289 81203, 08191-81204, 08191-81205, 08191- 84103, 08191-84104, 08191-84105, 08191- 81206 84106 24-22 799-601-9280 Pin (female terminal) Pin (male terminal) Part No.: 08191-82201, 08191-82202, 08191- Part No.: 08191-83101, 08191-83102, 08191- 82203, 08191-82204, 08191-82205, 08191- 83103, 08191-83104, 08191-83105, 08191- 82206 83106 20-237 PC58UU-3...
  • Page 290 Pin (male terminal) Pin (female terminal) Part No.: 08191-91203, 08191-91204, Part No.: 08191-94103, 08191-94104, 08191-91205, 08191-91206 08191-94105, 08191-94106 24-31 799-601-9290 Pin (female terminal) Pin (male terminal) Part No.: 08191-92203, 08191-92204, Part No.: 08191-93103, 08191-93104, 08191-92205, 08191-92206 08191-93105, 08191-93106 20-238 PC58UU-3...
  • Page 291 799-601-9040 Part No.: 08192-14200 (normal type) Part No.: 08192-14100 (normal type) 08192-24200 (fine wire type) 08192-24100 (fine wire type) 799-601-9050 Part No.: 08192-16200 (normal type) Part No.: 08192-16100 (normal type) 08192-26200 (fine wire type) 08192-26100 (fine wire type) 20-239 PC58UU-3...
  • Page 292 Part No.: 08192-1820! (normal type) Part No.: 08192-1810!(normal type) 08192-2820! (fine wire type) 08192-2810!(fine wire type) 12Gr: 799-601-9110 12B: 799-601-9120 12G: 799-601-9130 12Br: 799-601-9140 Part No.: 08192-1920! (normal type) Part No.: 08192-1910!(normal type) 08192-2920! (fine wire type) 08192-2910! (fine wire type) 20-240 PC58UU-3...
  • Page 293 Part No.: 08192 - 31200 (contact size #12) Part No.: 08192 - 31100 (contact size #12) 08192 - 41200 (contact size #8) 08192 - 41100 (contact size #8) 08192 - 51200 (contact size #4) 08192 - 51100 (contact size #4) 20-241 PC58UU-3...

  • Page 294: T-Adapter - Boxes And T-Adapter Table

    799-601-2830 DLI 799-601-2840 Extension cable 799-601-2850 Case 799-601-7010 X Q Q Q 799-601-7020 X Q Q Q 799-601-7030 X Q Q Q 799-601-7040 X Q Q Q 799-601-7050 SWP Q Q Q 799-601-7060 SWP 799-601-7310 SWP 799-601-7070 SWP 20-241-1 PC58UU-3...
  • Page 295 799-601-9030 DT 799-601-9040 DT 799-601-9050 DT 799-601-9060 DT 8P-Gray 799-601-9070 DT 8P-Black 799-601-9080 DT 8P-Green 799-601-9090 DT 8P-Brown 799-601-9110 DT 12P-Gray 799-601-9120 DT 12P-Black 799-601-9130 DT 12P-Green 799-601-9140 DT 12P-Brown 799-601-9210 HD30 18-8 799-601-9220 HD30 18-14 799-601-9230 HD30 18-20 20-241-2 PC58UU-3...
  • Page 296 799-601-9280 HD30 24-23 799-601-9290 HD30 24-31 799-601-9310 Plate For HD30 799-601-9320 Box for measurement For DT, HD 799-601-9330 Case 799-601-9340 Case 799-601-9350 DEUTSCH 799-601-9360 DEUTSCH 799-601-9410 For NE, G sensor For fuel, boost 799-601-9420 pressure 799-601-9430 PVC socket 20-241-3 PC58UU-3...

  • Page 297: Explanations Of Control Mechanism Of Electrical System

    (height, depth, offset), displaying of the depth, and one-touch deceleration. • Input/Output signal system for monitor and controller 20-242 PC58UU-3...
  • Page 298 [61] is diagnosed and reset, the controller is set in the normal mode and the error code display goes off. Even if there is any abnormality in the other than monitored inputs, error code is not displayed. Some input and output signals are checked with the [monitoring function]. 20-243 PC58UU-3...
  • Page 299 • Depth indicator displays [0.0] • (ground level). Push up machine body with work equip- ment. • Displayed depth increases from [0.1]. • All segments go OFF . • All segments go OFF . Turn OFF starting switch. 20-244 PC58UU-3...
  • Page 300 EXPLANATIONS OF CONTROL MECHANISM OF TROUBLESHOOTING ELECTRICAL SYSTEM POSITIONS OF WORK EQUIPMENT • Operation steps (Front of operator's • Operation step cab) • Operation steps (Side of operator's cab) 20-245 PC58UU-3...
  • Page 301 [UP] is displayed. • Example of depth of 2.5 m Display of depth Display of depth Display from ground level from datum plane Above ground level Above datum plane Ground level Datum plane Below ground level Below datum plane 20-246 PC58UU-3...
  • Page 302 • The buzzer sounds for about 1 second and the monitor and gauge segments light up for about 3 seconds, then all the segments, except the engine oil pressure and battery charge level, go off. 20-247 PC58UU-3...
  • Page 303 [CLEAR]) position, the code is displayed. • For the contents of display, see [Error codes list]. 4) To turn off the function of displaying saved error codes, perform the operation of 2) above again or turn the starting switch to the OFF position. 20-248 PC58UU-3...
  • Page 304 Note that although the [monitoring function] is not available for the above reason, the control- ler does not have a trouble. 2. Controller 1) Normal display: The green lamp in the side win- dow lights up. 2) Side window: Green lamp blinks. 20-249 PC58UU-3...
  • Page 305 While the code of [00] is displayed, if the switch is set to the [CLEAR] position, [60] is displayed again. 4) To go out of the monitoring mode, perform the operation of 2) above again or turn the starting switch to the OFF position. 20-250 PC58UU-3...
  • Page 306 Distance of work equipment edge from front of cab If [21] is displayed, distance is 21 cm. If [F .F] is Height of work equipment edge displayed, distance is longer than 100 cm. Distance of work equipment edge from side of cab 20-251 PC58UU-3...
  • Page 307 LEFT offset stop solenoid PPC main pressure lock solenoid (When LEFT offset is stopped) (When main pressure lock is reset) ON/OFF input/output Travel speed raising solenoid (When travel speed is raised) " 1 ~ " 3 , see the following page. 20-252 PC58UU-3...
  • Page 308 Accordingly, you cannot check that they are working nor- mally. When they can change the display of data to the display of code, however, they are judged nor- mal. 20-253 PC58UU-3...
  • Page 309 # The items in the thick frames are displayed singly. # If an error code in the range from 01 ~ 1F is displayed, reset the system referring to [Procedure for reset- ting electric system and checking its operation]. 20-254 PC58UU-3...
  • Page 310 EPC + Pump TVC trouble + 54 Sensor • When rotation sensor wire to controller is disconnected/shorted Potentiometer • Setting range of output voltage (Standard arm) Boom: 0.69 - 4.31 V Arm : 0.82 - 4.18 V Offset: 1.73 - 3.57 V 20-255 PC58UU-3...
  • Page 311 Accelerator motor drive + 74 age trouble relay trouble Valve open: When work equipment enters in emergency stop area Source voltage over-range: Above 17.68 V, below 8.58 V Sensor source voltage over-range: Above 5.45 V, below 4.78 V 20-256 PC58UU-3...
  • Page 312 Controller: Turns on LED (Green) lamp when normal code is displayed. • Electric system caution lamp: Goes off. • Alarm buzzer: Does not sound. # The display by the controller indicates the condition of the LED (Green) lamp on the side window. 20-257 PC58UU-3...

  • Page 313: Method Of Using Judgement Table

    (side face of controller) of the monitor panel. Judgement: If error code 41 is being displayed ....go to troubleshooting E-5 of electrical system If no error code is displayed, and the offset mode cannot be used ....go to troubleshooting H-14 of hydraulic system 20-258 PC58UU-3...

  • Page 314: Method Of Using Troubleshooting Charts

    When carrying out troubleshooting, see this chart for details of the connector pin num- ber and location for inspection and measurement of the wiring connector CNOO appearing in the troubleshooting flow chart for each failure mode (problem). 20-259 PC58UU-3...
  • Page 315 • Disconnect G2. Repair or ing harness between G2 3( ~ 4) replace (female) normal? (female) ~ M9 (female) Ω • 2,100 ~ 2,500 or between G2 (female) ~ M9 (female) Defective controller Replace E-1 Related electrical circuit diagram 20-260 PC58UU-3...
  • Page 316 E-26 Depth cannot be set to 0 or height cannot be set ................20-356 a Before carrying out troubleshooting, check that all the related connectors are properly inserted. a Always connect any disconnected connectors before going on to the next step. 20-301 PC58UU-3...
  • Page 317 3) Defective controller 1) Short circuit of (+) side of relay coil with chassis 2) Disconnection in (+) side of relay coil Motor drive relay (accelerator) system 3) Disconnection in relay coil or short circuit of it 4) Defective controller 20-302 PC58UU-3...
  • Page 318 1) Turns off output to motor drive relay, accelerator Engine cannot be controlled (cannot be relay, decelerator and relay. accelerated or decelerated). Resistance of relay coil: 80 – 120 z a Trouble is detected only while power is turned 20-303 PC58UU-3...
  • Page 319 1) Disconnection in one of wiring harnesses (Clock, Data, Strobe) between moni- tor and controller 2) No output in one of wiring harnesses (Clock, Data, Strobe) between monitor and controller 3) Defective controller (Broken completely) Monitor communication system 20-304 PC58UU-3...
  • Page 320 3) When controller is troubled: Controller stops out- 3) All work equipment, swing, and travel putting signals to all electronic devices which the operations are impossible (Blade 3) Turns ON LED on the side of the con- controller controls. operates normally, however). troller 20-305 PC58UU-3...
  • Page 321 While work equipment lock lever is set to LOCK position, work equipment moves Troubleshooting code when abnormal display is given E-19 E-11 E-12 a1: [EE] is displayed on monitor panel but display unit of controller is turned off. a2: When error code [61] is not displayed 20-306 PC58UU-3...
  • Page 322 TROUBLESHOOTING E-MODE Self-diagnostic display (Abnormal display) H-10 H-11 H-13 — H-41 — H-41 — H-41 — — — M-11 — M-15 — E-25 E-26 E-24 — — 20-307 PC58UU-3...

  • Page 323: Judgment Table For Machine Control

    Engine cannot be controlled (cannot be accelerated or decelerated). Blade speed or power is low Hydraulic drift of blade is large Troubleshooting code when abnormal display is given E-11 E-12 E-1 E-2 E-3 E-4 E-5 E-6 E-7 E-8 20-308 PC58UU-3...
  • Page 324 Self-diagnostic display Items checked in (Abnormal display) monitoring mode — — E-15 H-10 H-11 H-12 H-13 H-14 H-15 H-16 H-17 H-18 H-19 H-20 H-21 H-22 H-23 H-24 H-25 E-17 H-26 H-27 E-9 E-10 — E-13 E-14 E-15 E-16 — 20-309 PC58UU-3...

  • Page 325: E-Mode Related Electrical Circuit Diagram

    TROUBLESHOOTING E-MODE E-MODE RELATED ELECTRICAL CIRCUIT DIAGRAM 20-310 PC58UU-3...

  • Page 326: Pump Controller

    TROUBLESHOOTING E-MODE PUMP CONTROLLER 20-311 PC58UU-3...

  • Page 327: Engine Controller

    TROUBLESHOOTING E-MODE ENGINE CONTROLLER Serial No.: 20001 – 22000 20-312 PC58UU-3...
  • Page 328 TROUBLESHOOTING E-MODE Serial No.: 22001 and up 20-312-1 PC58UU-3...

  • Page 329: Precautions For Troubleshooting Controller System

    # The bucket is still in the interference area in the LEFT offset direction. If it is offset by about 50 mm to the right, it can be operated. 20-313 PC58UU-3...
  • Page 330 2) When a connector is disconnected and a T-adapter is inserted for troubleshooting or when the T- adapter is removed and the connector is connected again, the service code is not displayed or the monitor displays normally again. 20-314 PC58UU-3...
  • Page 331 (+) wiring harness]. Accordingly, if error code [41] is displayed, never turn on the reset switch but perform troubleshooting first. • Diodes related to each solenoid Related diodes Error code Troubled system PPC lock solenoid LEFT offset stop solenoid Boom RAISE EPC solenoid Arm IN EPC solenoid 20-315 PC58UU-3...

  • Page 332: Error Code [24] (Trouble In Engine Speed Sensor System) Is Displayed

    • Disconnect G2. ness between G2 (female) replace – (40) normal? • 2,100 – 2,500 z (40) – M9 (female) (2) or between G2 (female) (39) – M9 (female) (1) Defective controller Replace E-1 Related electrical circuit diagram 20-316 PC58UU-3...

  • Page 333: Error Code [31] (Trouble In Boom Potentiometer System) Is Displayed

    Repair or ness between G1 (female) replace (21), (22) – M14 (female) (A), Table 1 M14 (male) Resistance Between 4 – 6 kz (A) – (C) Between 0.2 – 7 kz (B) – (A) E-2 Related electrical circuit diagram 20-317 PC58UU-3...

  • Page 334: Error Code [32] (Trouble In Arm Potentiometer System) Is Displayed

    Repair or ness between G1 (female) replace (21), (22) – W4 (female) (A), Table 1 W4 (male) Resistance Between 4 – 6 kz (A) – (C) Between 0.2 – 7 kz (B) – (A) E-3 Related electrical circuit diagram 20-318 PC58UU-3...

  • Page 335: Error Code [34] (Trouble In Offset Potentiometer System) Is Displayed

    Repair or ness between G1 (female) replace (21), (22) – W3 (female) (A), Table 1 W3 (male) Resistance Between 4 – 6 kz (A) – (C) Between 0.2 – 7 kz (B) – (A) E-4 Related electrical circuit diagram 20-319 PC58UU-3...

  • Page 336: Error Code [41] (Trouble In Ppc Lock Solenoid System) Is Displayed

    Note: If an ordinary tester is set in the diode range, the voltage of the battery in itself is indicated. When a har- ness containing a diode is checked with this tester, [if this voltage does not change, there is not continu- ity], and [if this voltage changes, there is continuity]. E-5 Related electrical circuit diagram 20-320 PC58UU-3...

  • Page 337: Error Code [42] (Trouble In Left Offset Stop Solenoid System) Is Displayed

    Note: If an ordinary tester is set in the diode range, the voltage of the battery in itself is indicated. When a har- ness containing a diode is checked with this tester, [if this voltage does not change, there is not continu- ity], and [if this voltage changes, there is continuity]. E-6 Related electrical circuit diagram 20-321 PC58UU-3...

  • Page 338: Error Code [48] (Trouble In Traveling Accelerator Solenoid System) Is Displayed

    • Turn starting switch OFF lated from chassis ground? tive contact, or short circuit • Disconnect G3 with chassis ground in wiring harness between G3 (female) (3) – F8 (female) (1) Defective controller Replace E-7 Related electrical circuit diagram 20-322 PC58UU-3...

  • Page 339: Error Code [51] (Trouble In Boom Raise Stop Solenoid System) Is Displayed

    Note: If an ordinary tester is set in the diode range, the voltage of the battery in itself is indicated. When a har- ness containing a diode is checked with this tester, [if this voltage does not change, there is not continu- ity], and [if this voltage changes, there is continuity]. E-8 Related electrical circuit diagram 20-323 PC58UU-3...

  • Page 340: Error Code [52] (Trouble In Arm In Stop Solenoid System) Is Displayed

    Note: If an ordinary tester is set in the diode range, the voltage of the battery in itself is indicated. When a har- ness containing a diode is checked with this tester, [if this voltage does not change, there is not continu- ity], and[if this voltage changes, there is continuity]. E-9 Related electrical circuit diagram 20-324 PC58UU-3...

  • Page 341: Error Code [54] (Trouble In Tvc-Epc Solenoid System) Is Displayed

    Min. 1Mz ing harness insulated from chassis replace ness between G3 (female) • Turn starting switch OFF ground? (23) – M11 (female) (2) • Disconnect G3 and M11 Defective controller Replace E-10 Related electrical circuit diagram 20-325 PC58UU-3...

  • Page 342: Error Code [62] (Trouble In Controller Power Source System) Is Displayed

    • Turn starting switch ON and (23) and chassis ground normal? Disconnection or defective contact in wiring harness Repair or between G3 (female) (2), replace (12), (22) – fuse (5) – starting switch E-11 Related electrical circuit diagram 20-326 PC58UU-3...

  • Page 343: Error Code [64] (Trouble In Sensor Power Source System) Is Displayed

    G3 (1), (11) – bat- replace • Turn starting switch ON chassis ground normal? tery Disconnection or defective contact in wiring harness between G1 (female) (22) – Replace M14 (female) (C), W4 (female) (A), W3 (female) (C) E-12 Related electrical circuit diagram 20-327 PC58UU-3...

  • Page 344: Error Code [71] (Motor Drive Relay (Accelerator)) Is Displayed

    Min. 1 M z replace (female) (25) – chassis normal? between G3 (female) (25) – • Turn starting switch OFF. R4 (female) (1) • Disconnect G3 and R4. Defective controller Replace E-13 Related electrical circuit diagram 20-328 PC58UU-3...

  • Page 345: Error Code [72] (Motor Drive Relay (Decelerator)) Is Displayed

    Min. 1 Mz replace (female) (35) – chassis normal? between G3 (female) (35) – • Turn starting switch OFF. R3 (female) (1) • Disconnect G3 and R3. Defective controller Replace E-14 Related electrical circuit diagram 20-329 PC58UU-3...

  • Page 346: Error Code [74] (Motor Drive Relay (Decelerator)) Is Displayed

    Min. 1 Mz replace (female) (18) - chassis normal? between G3 (female) (18) – • Turn starting switch OFF. R5 (female) (1) • Disconnect G3 and R5. Defective controller Replace E-15 Related electrical circuit diagram 20-330 PC58UU-3...

  • Page 347: Error Code [78] (Abnormality In Motor Stall System) Is Displayed

    Between G3 (19), (39) – (23): When dial is operated, is each input Defective motor (signal sys- Replace 10 - 16 V signal normal? tem) • When dial is decreased: Between G3 (29) – (23): 10 – 16 V Defective controller Replace 20-331 PC58UU-3...
  • Page 348 TROUBLESHOOTING E-16 E-16 Related electrical circuit diagram 20-332 PC58UU-3...

  • Page 349: Error Code [Ee] (Fault In Controller) Is Displayed

    Disconnection or defective contact in wiring harness between fuse No. 5 – CN- G3 (1), (11), (22) Broken fuse FU4 Replace fuse Replace con- Defective controller troller E-17 a) Related electrical circuit diagram (Fault in controller) 20-333 PC58UU-3...

  • Page 350: B) When Communication System Between Controller And Monitor Panel Is Troubled

    (12) (wiring harness side) – harness between CN-F27 (2), (8), chassis: 6 – 10 V (12) - CN-G2 (9), (18), (19) Replace moni- Defective monitor panel tor panel E-17 b) Related electrical circuit diagram (Fault in controller) 20-334 PC58UU-3...

  • Page 351: Defective Engine Control System

    • Turn starting switch OFF. mal? (female) (6) – G3 (female) • Disconnect F22 and G3. (29) Is voltage between each terminal of accelerator motor and chassis as Defective accelerator motor Replace shown in Table 1? Defective controller Replace 20-335 PC58UU-3...
  • Page 352 Decelerate engine. Max. 1 V Insert T-adapter. Between F22 (6) – chassis Turn starting switch ON. Accelerate engine. Max. 1 V Insert T-adapter. Turn starting switch ON. Decelerate engine. 10 – 16V Insert T-adapter. E-18 Related electrical circuit diagram 20-336 PC58UU-3...

  • Page 353: (Abnormal Speed Or Insufficient Stroke Of Cable)

    • Turn starting switch OFF. (female) (6) – G3 (female) • Disconnect F22 and G3. (29) Is voltage between each terminal of accelerator motor and chassis as Defective accelerator motor Replace shown in Table 1? Defective controller Replace 20-337 PC58UU-3...

  • Page 354: C) One-Touch Decelerator Does Not Operate

    Bending or interference of Disconnect cable from motor Does fuel control cable move fuel control cable linkage or Repair or and rotate it with hand. smoothly? defective operation of gover- replace nor lever Insufficient accelerator motor Replace torque 20-338 PC58UU-3...

  • Page 355: When Starting Switch Is Turned To Start Position, Engine Does Not Start

    Is voltage between safety relay terminal 10 – 15 V B and chassis ground normal? To 13 on next page To 11 on next page To 14 on next page To 10 on next page To 12 on next page 20-339 PC58UU-3...
  • Page 356 • Max. 1z Repair or contact in wiring harness Is voltage between M15 (female) (4) • Disconnect R1 between M15 (female) (4) – replace and chassis ground normal? • Turn starting switch OFF chassis ground Defective safety relay Replace 20-340 PC58UU-3...
  • Page 357 TROUBLESHOOTING E-19 E-19 a) Related electrical circuit diagram 20-341 PC58UU-3...
  • Page 358 • Starting switch START: 10 – 15 V B and chassis ground normal? To 13 on next page To 11 on next page To 14 on next page To 10 on next page To 12 on next page 20-342 PC58UU-3...
  • Page 359 • Max. 1z Repair or contact in wiring harness Is voltage between M35 (female) (5) • Disconnect R1 between M35 (female) (5) – replace and chassis ground normal? • Turn starting switch OFF chassis ground Defective safety relay Replace 20-343 PC58UU-3...
  • Page 360 TROUBLESHOOTING E-19 E-19 a) Related electrical circuit diagram 20-344 PC58UU-3...

  • Page 361: B) Engine Stop Solenoid System

    Between M16 (1) – Between R1 (1) – (2) 1.0 ± 0.5 sec. – chassis ground chassis ground HOLD coil Between M12 (2) Between R3(female) Between M16 (4) – — – chassis ground – chassis ground chassis ground 20-345 PC58UU-3...
  • Page 362 Is voltage between M16 (1) – (2) as Defective timer Replace shown in table? Disconnection or defective contact in wiring harness Repair or replace between R1 (female) (1), (2) – M16 (female) (1), (2) E-19 b) Related electrical circuit diagram 20-346 PC58UU-3...

  • Page 363: When Starting Switch Is Turned To Off Position, Engine Does Not Stop

    Is voltage between M13 (2) and chassis Defective starting switch Replace OFF: 0 V ground normal? Remove solenoid and turn in Does stop solenoid operate normally? Defective stop solenoid Replace ON and OFF repeatedly Repair or Defective governor replace E-20 Related electrical circuit diagram 20-347 PC58UU-3...
  • Page 364 Is voltage between M13 (2) and chassis Defective starting switch Replace OFF: 0 V ground normal? Remove solenoid and turn Does stop solenoid operate normally? Defective stop solenoid Replace in ON and OFF repeatedly Repair or Defective governor replace E-20 Related electrical circuit diagram 20-348 PC58UU-3...

  • Page 365: When Traveling Accelerator Pedal Is Pressed, Travel Speed Does Not Rise

    • Turn starting switch OFF Defective controller Replace solenoid normal? • Disconnect F8 Disconnection or defective contact in wiring harness Repair or between travel speed accel- replace eration switch – F19 (1) – chassis ground E-21 Related electrical circuit diagram 20-349 PC58UU-3...

  • Page 366: When Traveling Accelerator Pedal Is Released, Travel Speed Does Not Lower From Raised Level

    Min. 1 Mz switch normal? tor switch • Turn starting switch OFF. • Disconnect switch terminal Short circuit with power source in wiring harness Repair or between G3 (female) (27) – replace F8 (female) (2) E-22 Related electrical circuit diagram 20-350 PC58UU-3...

  • Page 367: When Work Equipment Lock Lever Is Set To Free Position, Work Equipment Does Not Move

    • Disconnect G3 and R2. tact in wiring harness Repair or replace and R2 (female) (3) normal? • Measure on G3 side in diode between R2 (female) (38) – range R2 (female) (3) To 10 on next page 20-351 PC58UU-3...
  • Page 368 Repair or • Turn starting switch OFF replace and F7 (female) (2) normal? between R2 (female) (5) – F7 • Disconnect R2 and F7 (female) (2) Defective controller Replace E-23 Related electrical circuit diagram 20-352 PC58UU-3...

  • Page 369: After Work Equipment Lock Lever Is Locked, Work Equipment Still Moves

    Defective controller Replace chassis ground normal? switch ON • Set PPC lock switch to FREE Short circuit with power source in wiring harness Repair or between G3 (female) (38) – replace F7 (female) (2) E-24 Related Electrical Circuit Diagram 20-353 PC58UU-3...

  • Page 370: System Cannot Be Initialized

    In this monitoring mode, SET and CLEAR of the set switch are used to change the data display to the code display. Accordingly, the normal operation cannot be judged by the bit. Instead, judge that the operation is normal when the code is displayed. 20-354 PC58UU-3...
  • Page 371 TROUBLESHOOTING E-25 E-25 Related electrical circuit diagram 20-355 PC58UU-3...

  • Page 372: Depth Cannot Be Set To 0 Or Height Cannot Be Set

    In this monitoring mode, SET and CLEAR of the set switch are used to change the data display to the code display. Accordingly, the normal operation cannot be judged by the bit. Instead, judge that the operation is normal when the code is displayed. E-26 Related electrical circuit diagram 20-356 PC58UU-3...
  • Page 373 F-2 Controller does not display [26 (3)] (Traveling accelerator switch)............20-403 a Before carrying out troubleshooting, check that all the related connectors are properly inserted. a Always connect any disconnected connectors before going on to the next step. 20-401 PC58UU-3...
  • Page 374 Is resistance between F18 (2) – chassis • Turn starting switch OFF. Defective fuse (3) Replace ground normal? • Disconnect F18. Disconnection or defective Replace wiring contact in wiring harness harness between F18 (1) – G3 (9) F-1 Related electrical circuit diagram 20-402 PC58UU-3...
  • Page 375 • Disconnect switch terminal. switch – chassis ground Disconnection or defective Replace wiring contact in wiring harness harness between traveling accelerator switch – G1 (5) F-2 Related electrical circuit diagram 20-403 PC58UU-3...
  • Page 376 H-17 Hydraulic drift of offset boom is large ..................20-534 a) Hydraulic drift of offset boom to left is large ............... 20-534 b) Hydraulic drift of offset boom to right is large..............20-534 H-18 Time lag is large (Engine speed is low) ..................20-535 20-501 PC58UU-3...

  • Page 377: H-Mode

    H-40 Monitor panel displays error code [61] and boom RAISE, arm IN, and LEFT offset operations stop just before interference..................20-559 H-41 Machine does not stop boom RAISE, arm IN, and LEFT offset operations automatically but interferes ......................20-559 20-502 PC58UU-3...

  • Page 379: Table Of Failure Modes And Causes

    Fine controllability of blade is poor or response is low Monitor panel displays error code [61] and all operations stop just before interference Prevention of interference Machine does not stop boom RAISE, arm IN, and LEFT offset operations auto- matically but interferes 20-504 PC58UU-3...
  • Page 380 G G G G G H-30 G G G G H-31 H-32 G G G H-33 H-34 G G G G G G G G H-35 H-36 H-37 H-38 H-39 G G G H-40 G G G H-41 20-505 PC58UU-3...

  • Page 381: Speed Or Power Of Work Equipment (Including Blade), Travel, And Swing Systems Is Low

    Speed or power of work equipment (including blade), travel, and swing systems is low Cause Remedy Go to related troubleshoot- Is suction strainer clogged? — ing in H-6 ~ 9, 21, 28, and 36 Clogged of suction strainer Clean or replace (Suction trouble of pump) 20-506 PC58UU-3...

  • Page 382: B) Speed Or Power Of Work Equipment (Excluding Blade), Travel, And Swing Systems Is Low

    H-6 ~ 9 and 21 When travel relief pressure is adjusted or relief valve is replaced, is trouble repaired? Defective main relief valve Adjust or replace Adjust or Does unload valve move smoothly? Defective unload valve replace Go to troubleshooting No. 3 20-507 PC58UU-3...

  • Page 383: D) Speed Or Power Of Swing And Blade Systems Is Low

    — ing in H-21 and 36 When hose is disconnected from Go to related troubleshoot- valve outlet and plug is installed — ing in H-21 and 36 instead, is relief pressure normal? Repair or Defective swivel joint replace 20-508 PC58UU-3...

  • Page 384: F) Speed Or Power Of Work Equipment (Excluding Blade) Is Low

    PPC Replace pressure is normal g) Speed or power of travel and swing systems is low Carry out troubleshooting in b) above. # If the PPC main pressure is lower than in b) above, this trouble can occur. 20-509 PC58UU-3...

  • Page 385: There Is Excessive Drop In Engine Speed Or Engine Stalls

    Does monitor display error code [54] to indicate defective TVC? Is TVC connector connected? Defective connection Repair Defective TVC-EPC valve Replace (Solenoid valve) When engine speed changes, does Repair or Defective controller TVC current change? replace To next page 20-510 PC58UU-3...
  • Page 386 When EPC valve TVC is replaced, is Carry out troubleshooting — trouble repaired? No. 11 Repair or Defective EPC valve replace When pump assembly is replaced, is Defective engine system — trouble repaired? Repair or Defective pump or servo replace 20-511 PC58UU-3...

  • Page 387: Two Or More Of Work Equipment (Boom, Arm, Bucket, And Offset), Travel, Swing, And Blade Systems Do Not Move

    • When oil flows out of main pump but does not flow out of gear pump and pilot pump Coupling or spline between main Defective gear pump Replace pump and gear pump is damaged. Defective coupling or spline Replace 20-512 PC58UU-3...

  • Page 388: B) Work Equipment (Excluding Blade), Travel, And Swing Systems Do Not Move

    When gear pump circuit relief valve Go to related troubleshoot- is adjusted or replaced, is travel — ing in H-29 and 37 repaired? Defective gear pump circuit Adjust or relief valve replace 20-513 PC58UU-3...

  • Page 389: E) Travel And Blade Systems Do Not Move

    Go to related troubleshoot- — ing in H-10 ~ 137 Go to related troubleshoot- Is PPC pressure normal at only 1 — part? ing in H-10 ~ 13 Defective PPC circuit check Replace valve at part where pres- sure is normal 20-514 PC58UU-3...

  • Page 390: Abnormal Noise Generated (From Around Pump)

    Repair or Defective inside of pump replace Check again Operate and check condi- Is hydraulic tank cap clogged? (as condition tion for a while changes) Negative pressure in tank Clean or replace caused by clogging of cap 20-515 PC58UU-3...

  • Page 391: Fine Controllability Is Poor Or Response Is Low

    Repair or Is orifice of piston pump clogged? replace piston Clogging of orifice of pis- Clean ton pump When LS valve is adjusted, is trouble Repair or Defective LS valve repaired? replace Improper adjustment of LS Adjust valve 20-516 PC58UU-3...

  • Page 392: Boom Speed Or Power Is Low (Other Work Equipment Is Normal)

    • 2.94 - 0.1 kg/cm²} Defective boom RAISE PPC Repair or Is PPC valve output pressure normal? • Run engine at full throttle valve replace • Measure at solenoid valve inlet Defective boom RAISE EPC Repair or valve replace 20-517 PC58UU-3...

  • Page 393: B) Boom Lower Speed Or Power Is Low

    When PPC hose of control valve is (Move arm OUT and LOWER replaced with arm OUT hose, is trou- Go to troubleshooting No. 3 — boom) ble repaired? (Return hose immedi- ately after checking.) Defective boom LOWER PPC Repair or valve replace 20-518 PC58UU-3...

  • Page 394: Arm In Speed Or Power Is Low

    Are PPC pressure inlet of solenoid - 0.1 Repair or valve and PPC valve output pressure Defective arm IN PPC valve kg/cm²} replace normal? • Run engine at full throttle Repair or Defective arm IN EPC valve replace 20-519 PC58UU-3...

  • Page 395: B) Arm Out Speed Or Power Is Low

    When PPC hose of control valve is (LOWER boom and move arm replaced with boom LOWER hose, is Go to troubleshooting No. 3 — OUT) trouble repaired? (Return hose imme- diately after checking.) Defective arm OUT PPC Repair or valve replace 20-520 PC58UU-3...

  • Page 396: Bucket Curl Speed Or Power Is Low

    When PPC hose of control valve is (Move arm IN and CURL replaced with arm IN hose, is trouble Go to troubleshooting No. 3 — bucket) repaired? (Return hose immediately after checking.) Defective bucket CURL PPC Repair or valve replace 20-521 PC58UU-3...

  • Page 397: B) Bucket Dump Speed Or Power Is Low

    When PPC hose of control valve is (Move arm OUT and DUMP replaced with arm OUT hose, is trou- Go to troubleshooting No. 3 — bucket) ble repaired? (Return hose immedi- ately after checking.) Defective bucket DUMP PPC Repair or valve replace 20-522 PC58UU-3...

  • Page 398: Offset Left Speed Or Power Is Low

    (Return hose imme- diately after checking.) Defective bucket DUMP PPC Repair or valve replace Defective offset LEFT PPC Repair or Is PPC valve output pressure normal? valve replace Defective offset LEFT sole- Repair or noid valve replace 20-523 PC58UU-3...

  • Page 399: B) Offset Right Speed Or Power Is Low

    When PPC hose of control valve is (DUMP bucket and move replaced with bucket DUMP hose, is Go to troubleshooting No. 3 — RIGHT offset cylinder) trouble repaired? (Return hose imme- diately after checking.) Defective offset RIGHT PPC Repair or valve replace 20-524 PC58UU-3...

  • Page 400: Boom Does Not Raise

    Go to troubleshooting No. 2 — RIGHT offset cylinder) repaired? (Return hose immediately after checking.) Defective boom RAISE PPC Repair or Is PPC valve output pressure normal? valve replace Defective boom RAISE sole- Repair or noid valve replace 20-525 PC58UU-3...

  • Page 401: B) Boom Does Not Lower

    When PPC hose of control valve is (Move arm OUT and LOWER replaced with arm IN hose, is trouble Go to troubleshooting No. 2 — boom) repaired? (Return hose immediately after checking.) Defective boom LOWER PPC valve 20-526 PC58UU-3...

  • Page 402: A) Arm Does Not Move

    +0.5 MPa {30 kg/cm²} • 2.94 Defective arm IN PPC Repair or -0.1 noid valve and PPC valve out- valve replace • Run engine at full throttle. put pressure normal? Defective arm IN EPC Repair or valve replace 20-527 PC58UU-3...

  • Page 403: B)Arm Does Not Move Out

    When PPC hose of control valve is replaced with boom (Lower boom and move arm Defective arm OUT Repair or LOWER hose, is trouble out) PPC valve replace repaired? (Return hose immediately after checking.) Go to troubleshoot- — ing No. 2 20-528 PC58UU-3...

  • Page 404: Bucket Does Not Curl

    Go to troubleshoot- PPC pressure at PCC pressure hose, is trouble repaired? — ing No. 2 inlet of control valve is above (Return hose 2.45 MPa {25 kg/cm²}. immediately after checking.) Defective bucket Repair or CURL PPC valve replace 20-529 PC58UU-3...

  • Page 405: B) Bucket Does Not Dump

    When PPC hose of control valve is replaced with arm OUT (Move arm out and dump Go to troubleshoot- hose, is trouble repaired? — bucket) ing No. 2 (Return hose immediately after checking.) Defective bucket Repair or DUMP PPC valve replace 20-530 PC58UU-3...

  • Page 406: A) Offset Boom Does Not Move

    CURL hose, is trouble — boom to left) ing No. 2 repaired? (Return hose immediately after checking.) Is PPC valve output pressure Defective offset LEFT Repair or normal? PPC valve replace Defective offset LEFT Repair or solenoid valve replace 20-531 PC58UU-3...

  • Page 407: B) Offset Boom Does Not Move To Right

    (Dump bucket and move offset Go to troubleshoot- DUMP hose, is trouble — boom to right) ing No. 2 repaired? (Return hose immediately after checking.) Repair or Defective offset replace RIGHT PPC valve 20-532 PC58UU-3...

  • Page 408: Hydraulic Drift Of Boom Is Large

    When centralized safety valve is replaced, is trouble repaired? Defective centralized Replace safety valve Defective oiltight- If suction valve is replaced with Repair or ness of control valve blind plug, is travel repaired? replace spool Defective suction Repair or valve replace 20-533 PC58UU-3...

  • Page 409: Hydraulic Drift Of Bucket Is Large

    Replace valve b) Hydraulic drift of offset boom to right is large Cause Remedy Is leakage from hydraulic cylin- Defective cylinder Repair or der normal? piston packing replace Defective oiltight- Repair or ness of control valve replace spool 20-534 PC58UU-3...

  • Page 410: Time Lag Is Large (Engine Speed Is Low)

    Arm IN Boom RAISE + Arm OUT Arm OUT Boom RAISE Boom RAISE + Bucket CURL Arm OUT Bucket CURL Arm OUT + Bucket DUMP Arm OUT Bucket CURL Boom LOWER + Arm OUT Arm OUT Boom LOWER 20-535 PC58UU-3...

  • Page 411: Travel Deviation Is Large

    Defective operation of Adjust, Does pressure compensation valve pressure compensation repair, or move smoothly? valve replace To next To next To next page page page 20-536 PC58UU-3...

  • Page 412: B) Travel Deviation Is Large When Machine Starting (But Normal During Ordinary Travel)

    Repair or Defective swivel joint replace Repair or Does travel motor counterbal- Defective counterbal- replace ance valve operate smoothly? ance valve Go to troubleshoot- — ing No. 5 in (a) above 20-537 PC58UU-3...

  • Page 413: Travel Speed Or Power Is Low (Work Equipment, Swing, And Blade Operations Are Normal)

    Defective unload valve smoothly? replace Large leakage from Repair or travel motor or swivel replace joint When PPC circuit check valve is Repair or Defective PPC valve replaced, is travel speed normal? replace Defective PPC circuit Replace check valve 20-538 PC58UU-3...

  • Page 414: Machine Cannot Be Steered Sharply Or Steering Force Is Insufficient

    Defective counterbal- When check valve of main ance valve of travel Repair or relief circuit is replaced, is trou- motor or defective replace ble repaired? swivel joint Defective check valve Repair or replace of main relief circuit 20-539 PC58UU-3...

  • Page 415: Travel Speed Does Not Change

    OFF: 0 MPa {0 kg/cm²} tor solenoid valve normal? valve or trouble in elec- • Run engine at full throttle tric system caused by defective traveling accelerator switch Defective travel motor Repair or or piston of 2nd gear replace speed changeover valve 20-540 PC58UU-3...

  • Page 416: Machine Does Not Travel

    When PPC hose is replaced with boom PPC pressure Defective PPC circuit Repair or boom hose on control valve side, check valve replace (Restore original state does PPC pressure rise? immediately after checking). Repair or Defective PPC valve replace 20-541 PC58UU-3...
  • Page 417 Example: When checking function of b is lost • Normal operations: "Left forward", "Left forward + Right forward", "Left forward + Right reverse" • Operations which may be abnormal: "Left reverse", "Right forward", "Right reverse", "Left reverse + Right forward", "Left reverse + Right reverse" 20-542 PC58UU-3...

  • Page 418: Overrun Of Travel Is Large

    Repair or Defective check valve move smoothly? replace Defective travel motor Repair or (motor unit) replace H-26 Travel hydraulic drift is large Cause Remedy Defective parking brake of travel motor Repair or or defective parking replace brake valve 20-543 PC58UU-3...

  • Page 419: Fine Controllability Or Response Is Low

    Repair or pressure compensation move smoothly? replace valve Defective operation of Repair or Does spool move smoothly? spool replace When PPC valve is replaced, is Repair or Defective travel motor trouble repaired? replace Repair or Defective PPC replace 20-544 PC58UU-3...

  • Page 420: Swing Speed Or Power Is Low

    Defective operation of Repair or Does spool move smoothly? spool replace Repair or Defective swing motor replace When swing PPC line throttle is cleaned, is trouble repaired? Clogging of throttle Clean To next To next page page 20-545 PC58UU-3...
  • Page 421 Adjust or Defective safety valves replace — When check valve and suction Go to troubleshooting valve of swing motor are replaced, No. 6 is trouble repaired? Defective check valve Repair or and suction valve replace 20-546 PC58UU-3...

  • Page 422: B) Swing Speed Or Power Is Low In Either Direction

    Defective check valve of Replace swing brake circuit When check valve and suction Go to troubleshooting valve of swing motor are replaced, — No. 4 is trouble repaired? Defective check valve Repair or and suction valve replace 20-547 PC58UU-3...

  • Page 423: Machine Does Not Swing (Work Equipment, Travel, And Blade Operations Are Normal)

    Defective operation of Repair or Does spool move smoothly? spool replace Repair or Defective swing motor replace When swing PPC line throttle is cleaned, is trouble repaired? Clogging of throttle Clean To next To next page page 20-548 PC58UU-3...
  • Page 424 Adjust or Defective safety valve replace When check valve and suction Go to troubleshooting valve of swing motor are replaced, — No. 6 is trouble repaired? Defective check valve Repair or and suction valve replace 20-549 PC58UU-3...

  • Page 425: B) Machine Does Not Swing In Both Directions

    Defective check valve of Replace swing brake circuit When check valve and suction Go to troubleshooting valve of swing motor are replaced, — No. 3 is trouble repaired? Defective check valve Repair or and suction valve replace 20-550 PC58UU-3...

  • Page 426: Swing Acceleration Is Low

    Carry out troubleshoot- valve is replaced, is trouble ing in H-28 and H-35 repaired? Defective swing motor Replace safety valve b) Swing acceleration is low in either direction Cause Remedy Carry out trouble- shooting in H-28 (b) and H-35 20-551 PC58UU-3...

  • Page 427: Overrun Of Swing Is Large

    Defective PPC valve valve, swing PPC line throttle, and replace swing PPC circuit throttle are cleaned, is trouble repaired? Clogging of swing PPC Repair or slow return valve, swing replace PPC line throttle, and swing PPC circuit throttle 20-552 PC58UU-3...

  • Page 428: Large Shock Is Made When Machine Stops Swinging

    Repair or Is foreign matter drained from swing machinery? valve of control valve replace Defective swing Repair or machinery replace H-34 Swing hydraulic drift is large Cause Remedy Defective swing parking Repair or brake (Clogging of replace hydraulic timer) 20-553 PC58UU-3...

  • Page 429: Fine Controllability Or Response Of Swing Is Low

    • Swing slow return valve (Adapter of PPC pressure inlet of control valve) • Swing PPC line throttle • Swing brake reset line throttle Replace the hoses at operation pattern change point in inspection window of left "2 deck (Restore original state immediately after checking). 20-554 PC58UU-3...

  • Page 430: Blade Speed Or Power Is Low (Work Equipment, Travel, And Swing Operations Are Normal)

    Carry out troubleshoot- ing in H-38 (Hydraulic • Max. 45 mm/15 min Is hydraulic drift normal? — drift of blade is exces- sive) Leakage inside control valve (through clear- Repair or ance between swing replace valve and blade valve) 20-555 PC58UU-3...

  • Page 431: Blade Does Not Move (Work Equipment, Travel, And Swing Operations Are Normal)

    Flattened or deformed hose Replace Carry out H-38 (Hydraulic drift of blade is excessive) If trouble is not repaired by H-38 Leakage inside control valve Repair or (through clearance between replace swing valve and blade valve) 20-556 PC58UU-3...

  • Page 432: B) Blade Does Not Lower

    Flattened or deformed hose Replace Blade cannot be lowered below ground level to lift machine body Carry out troubleshooting in Repair or H-36 (Blade speed or power replace is low) 20-557 PC58UU-3...

  • Page 433: Hydraulic Drift Of Blade Is Excessive

    Looseness of fitting parts of Repair or spool spring replace Defective operation of check Repair or Is hydraulic drift excessive? valve in spool or clogging of replace drilled hole of spool Carry out troubleshooting in H-38 (Hydraulic drift of blade is excessive) 20-558 PC58UU-3...

  • Page 434: Monitor Panel Displays Error Code [61] And Boom Raise, Arm In, And Left Offset Operations Stop Just Before Interference

    # If this trouble occurs, the trouble in h-39 occurs, too. Cause Remedy Defective operation of PPC Does PPC lock solenoid valve move Repair or lock solenoid valve (It does smoothly? replace not return) Defective controller Replace 20-559 PC58UU-3...
  • Page 436 Travel alarm does not sound ....................... 20-619 b) When machine stops, alarm does not stop ................. 20-619 a Before carrying out troubleshooting, check that all the related connectors are properly inserted. a Always connect any disconnected connectors before going on to the next step. 20-601 PC58UU-3...

  • Page 437: Electric Circuit Diagram Of Machine Monitor System

    TROUBLESHOOTING M-MODE Electric circuit diagram of machine monitor system Serial No.: 20001 – 22000 20-602 PC58UU-3...
  • Page 438 TROUBLESHOOTING M-MODE Serial No.: 22001 and up 20-602-1 PC58UU-3...

  • Page 439: When Starting Switch Is Turned To The On Position, Nothing Is Displayed (Segments Do Not Light Up For 3 Seconds)

    F27 (female) (1) – harness fuse 5 M-1 Related electrical circuit diagram M-2 When starting switch is turned to ON position, all segments light up but do not go off after 3 seconds Cause Remedy Defective monitor panel Replace 20-603 PC58UU-3...

  • Page 440: When Starting Switch Is Turned To On Position, Some Items Do Not Light Up For All Segment Light-Up Period Of 3 Seconds

    Go to M-4 — breakage. Broken bulb Replace Engine oil pressure caution lamp does not light up Cause Remedy • Check bulb visually for Is any wire in the lamp broken? Go to M-5 — breakage. Broken bulb Replace 20-604 PC58UU-3...

  • Page 441: When Starting Switch Is Turned To On Position (With Engine Stopped), Charge Level Caution Lamp Does Not Light Up

    • 13.5 – 14.5 V and chassis ground normal? Disconnection in wiring har- Repair or ness between F27 (female) replace wiring (10) – alternator terminal L harness M-4 Related electrical circuit diagram Serial No.: 20001 – 22000 Serial No.: 22001 and up 20-605 PC58UU-3...

  • Page 442: When Starting Switch Is Turned To On Position (With Engine Stopped), Engine Oil Pressure Caution Lamp Does Not Light Up

    F27 (female) Is continuity between F27 (female) (9) • Turn starting switch OFF. replace wiring (9) – T-M5 and (3), (4) normal? • Disconnect F27. harness (wiring harness side) Defective monitor panel Replace M-5 Related electrical circuit diagram 20-606 PC58UU-3...

  • Page 443: Engine Preheating Pilot Lamp Does Not Light Up While Engine Is Preheated

    Is F27 (female) (9) insulated from chas- • Turn starting switch OFF. in wiring harness between replace wiring sis ground? • Disconnect F27 and T-M5. F27 (female) (9) – T-M5 harness Defective monitor panel Replace M-7 Related electrical circuit diagram 20-607 PC58UU-3...

  • Page 444: Charge Level Caution Lamp Lights Up While Engine Is Running

    • Start engine. Is voltage between F27 (female) (10) in wiring harness between replace wiring • 13.5 – 14.5 V and (3), (4) normal? F27 (female) – alternator harness terminal L Defective monitor panel Replace M-8 Related electrical circuit diagram 20-608 PC58UU-3...
  • Page 445 Is voltage between F27 (female) (10) • Start engine. in wiring harness between replace wiring • 13.5 – 14.5 V and (3), (4) normal? F27 (female) – alternator harness terminal L Defective monitor panel Replace M-8 Related electrical circuit diagram 20-608-1 PC58UU-3...

  • Page 446: Engine Water Temperature Gauge (Coolant Temperature Gauge) Indicates Abnormally

    • Short F27 (6) to (3) and (4). replace wiring at last? M10 (female) (2) – chassis • See Note 1). harness ground Defective monitor panel Replace Note 1) If normal, gauge rises 1 level by 1 at intervals of about 2 seconds. 20-608-2 PC58UU-3...

  • Page 447: B) After Engine Is Started, Temperature Rises Immediatelytemperature Reaches

    • Disconnect F27. Repair or in wiring harness between • Resistance Min. 1 kz. and (3), (4) normal? replace F27 (female) (6) – M10 (female) (1) Defective monitor panel Replace M-9 a), b), and c) Related electrical circuit diagram 20-609 PC58UU-3...

  • Page 448: Fuel Level Gauge Indicates Abnormally

    Do all segments of fuel level gauge go • Turn the starting switch ON. replace wiring between F27 (female) (7) – off? • Wait for 1 minute harness M1 (female) (1) Replace Defective monitor panel 20-610 PC58UU-3...

  • Page 449: C) Fuel Level Gauge Does Not Indicate Full While Fuel Tank Is Full

    • Start engine Is voltage between F27 (3), (4) and replace wiring between F27 (female) (3), (4) • Max. 0.1 V chassis ground normal? harness – chassis ground Replace Defective monitor panel M-10 Related electrical circuit diagram 20-611 PC58UU-3...

  • Page 450: Alarm Buzzer Operates Abnormally

    • Turn the starting switch ON. When F27 is disconnected, does Repair or F27 (female) (15) – F14 replace • Disconnect F27. buzzer stop sounding? (female) (1) Defective monitor panel Replace M-11 a) and b) Related electrical circuit diagram 20-612 PC58UU-3...

  • Page 451: Alarm Buzzer Sounds For 7 Seconds And Electric System Caution Lamp Blinks While Emergency Work Equipment Operation Switch Is Not Turned On

    (1) and (2) as shown in Table 1? Contact with power Repair or source wiring harness in replace wiring harness between G3 (female) (30) - F25 (female) (1) Table 1 Emergency work equipment operation switch ON (RAISE) OFF (LOWER) M-12 Related Electrical Circuit Diagram 20-613 PC58UU-3...

  • Page 452: Service Meter Does Not Operate While Engine Is Running

    Is voltage between F27 (female) (10) Repair or in wiring harness between • 13.5 – 14.5 V and (3), (4) normal? replace F27 (female) (10) – alternator terminal L Defective monitor panel Replace M-13 a), b) Related electrical circuit diagram 20-614 PC58UU-3...
  • Page 453 Is voltage between F27 (female) (10) Repair or in wiring harness between replace • 13.5 – 14.5 V and (3), (4) normal? F27 (female) (10) – alternator terminal L Replace Defective monitor panel M-13 a), b) Related electrical circuit diagram 20-614-1 PC58UU-3...

  • Page 454: Lamps For Night Work Do Not Light Up

    F16 (female) (3) • 10 – 15 V Breakage of bulb for night Replace work (inside monitor panel) b) Lamp for service meter does not light up Cause Remedy Defective monitor panel Replace M-14 a), b) Related electrical circuit diagram 20-615 PC58UU-3...

  • Page 455: Electric System Caution Lamp Does Not Go Off (Controller Does Not Display Any Error Code And Operation Is Normal)

    When G2 (female) (8) is connected to Repair or contact in wiring harness • Turn starting switch ON. chassis ground, does caution lamp go replace wiring between F27 (female) (11) – off? harness G2 (female) (8) Defective controller Replace M-15 Related electrical circuit diagram 20-616 PC58UU-3...
  • Page 456 Is there continuity between F15 (male) contact in wiring harness Repair or • Disconnect F20. replace (3) and chassis ground? between F15 (female) (3) – • Set heater switch to Hi. F20 (female) (2) See troubleshooting for — heater 20-617 PC58UU-3...
  • Page 457 TROUBLESHOOTING M-16 M-16 Related electrical circuit diagram 20-618 PC58UU-3...

  • Page 458: Travel Alarm Does Not Sound Or Does Not Stop Sounding

    • Turn starting switch ON. When connector T1 is disconnected, Repair or source in wiring harness replace • Set travel lever in neutral. does alarm stop? between T1 (female) (1) – T2 (female) (2) Defective pressure switch Replace 20-619 PC58UU-3...
  • Page 459 TROUBLESHOOTING M-17 M-17 Related electrical circuit diagram 20-620 PC58UU-3...
  • Page 460 ASSEMBLY OF WORK EQUIPMENT VALVE (NOTES) ........30-58 30-1 PC58UU-3...

  • Page 461: Method Of Using Manual

    3. Listing of special tools For details of the description, part number, and quantity of any tools (A1, etc.) that appear in the operation procedure, see the SPECIAL TOOL LIST later in this section. 30-2 PC58UU-3...

  • Page 462: Precautions When Performing Operation

    B. Split flange type hoses and tubes C. If the part is not under hydraulic pressure, the following corks can be used: Dimensions Nominal Part Number number 07049-00608 07049-00811 07049-01012 07049-01215 07049-01418 11.5 07049-01620 13.5 07049-01822 07049-02025 07049-02228 18.5 07049-02430 07049-02734 22.5 30-3 PC58UU-3...
  • Page 463 When changing the oil in the hydraulic tank, or when removing the piston pump or piston pump piping, always bleed the air before starting the engine to prevent seizure of the pump. For details, see TESTING AND ADJUSTING, Bleeding air from piston pump. 30-4 PC58UU-3...
  • Page 464 If the engine is run at high speed from the start, or the cylinders are operated to the end of the stroke, the air inside the cylinder will cause damage to the piston packing. After repair or long storage, follow the same procedure. 30-5 PC58UU-3...
  • Page 466 Press fit of carrier roller oil seal • 790-101-5021 Grip of carrier roller assembly • 01010-50816 Bolt 790-101-5001 Push tool KIT (A) • 790-101-5081 Plate Press fit of carrier roller cap • 790-101-5021 Grip • 01010-50816 Bolt 30-7 PC58UU-3...
  • Page 467 2nd boom cylinder 6 790-720-1000 Expander Installation of piston ring 796-720-1660 Band 1st boom and blade cylinder 07281-01159 Clamp 796-720-1670 Band 2nd boom cylinder 07281-01279 Clamp 796-720-1650 Band Arm and offset cylinder 07281-01029 Clamp 796-720-1640 Band Bucket cylinder 07281-00909 Clamp 30-8 PC58UU-3...
  • Page 468 Washer 791-112-1180 790-101-2102 Puller (30-ton) 790-101-1102 Hydraulic pump 799-703-1200 Service tool KIT 799-703-1100 Vacuum pump (100V) Fill of air 799-703-1110 Vacuum pump (220V) For overseas market conditioner gas 799-703-1120 Vacuum pump (240V) For overseas market 799-703-1400 Leak tester 30-9 PC58UU-3...
  • Page 469 2. Loosen the rear cover (3) mounting bolt. Loosen the fuel air bleed hose clamp inside the cover and remove the hose. Remove the fuel tank cap and remove the cover (3). 30-10 PC58UU-3...

  • Page 470: Engine And Work Equipment Pump Assembly

    When antifreeze is used in the coolant, handle it as a hazardous liquid in accor- dance with all local laws and safety regu- lations. Hydraulic oil: Approx. 56 l l l l Coolant: Approx. 8 l l l l 30-11 PC58UU-3...
  • Page 471 (24) mounting bolt and remove the fan. 13. Disconnect the electrical harness and remove the connectors and harnesses from the work equipment pump solenoid (29), the engine speed sensor (30), the fuel pump, the stop motor, the air heater, the oil pressure gauge, etc. 30-12 PC58UU-3...
  • Page 472 Remove the rear view mirror. side nuts and the mounting nuts. Canopy assembly: 164 kg 16. Remove the clamp and fuel hose (37). Discon- nect the hose below the fuel pump (38). 19. Remove the Left side cover (41). 30-13 PC58UU-3...
  • Page 473 22. Disconnect each harness from the starting motor (46). 25. Use the eyebolts and lift the engine pump assembly (51) to remove the 4 nuts of the mount (52), then lift the engine pump assem- bly away. Engine pump assembly: 230 kg 30-14 PC58UU-3...
  • Page 474 5. Lift the canopy mounting frame (33) and set it in position. Attach it with 4 bolts and tighten the bolts to the specified torque. 4 Frame : 60 kg 30-15 PC58UU-3...
  • Page 475 4 bolts (Be careful not to drop the spacers.). and the engine ground cable (28) to the Connect the upper hose (25) to the engine engine pump assembly. pump assembly and tighten the clamp to the specified torque. 30-16 PC58UU-3...
  • Page 476 14. Install the air cleaner brackets (55) and (56) and then install the air cleaner (54) to the engine pump assembly. 17. Install the controller (39), its cover (57) and the alternator cover (31) onto the engine pump assembly. 30-17 PC58UU-3...
  • Page 477 Start the engine. Turn the work equip- ment to the right. Lower the bucket com- pletely to the ground in front of the blade and stop the engine. 30-18 PC58UU-3...
  • Page 478 Install the clamp on the engine pump assembly. Install the tank cap and attach the cover (3) with the bolt to the engine pump assembly. 30-19 PC58UU-3...

  • Page 479: Removal

    (4) with a sling, remove parts mounted on the floor and the parts to be left the 11 mounting bolts and then lower the canopy. because they are mounted on the revolving 4 Canopy assembly: 164 kg frame. 30-20 PC58UU-3...

  • Page 480: Center Swivel Joint Assembly

    (20) from the right and left PPC valves used for operating the work equip- ment (the quick coupler). WARNING! Be careful. Avoid injury from the cutting edges of the color bands wound around the hoses. 30-21 PC58UU-3...
  • Page 481 Pre- pare a stable pedestal high enough so that the parts on the lower surface of the floor and below will not be damaged. Floor assembly: 110 kg 30-22 PC58UU-3...
  • Page 482 4 hoses including (36) and (37) from the travel motor and those on the opposite side as well. 18. Remove 4 mounting bolts (41) from the cen- ter swivel joint (40) and then remove the swivel joint (40). Swivel joint: 19.5 kg approx. 30-23 PC58UU-3...
  • Page 483 Attach the eyebolts at two places each on the front section of the floor and on the operator’s seat mounting bracket. Lift them with the lifting tools and install them at the specified positions. 4 Floor assembly: 110 kg 30-24 PC58UU-3...
  • Page 484 8. Connect the blade control cable (21) to the bracket (23) and tighten the nut. Install the turnbuckle (22) on the control lever and install the roll pin and the beta pin in the turnbuckle by inserting them. 30-25 PC58UU-3...
  • Page 485 13. Install the cover (28) on which the fuel oil filler tighten the mounting bolt by applying the port is provided. Install the left handrail (29) specified torque. Install the floor mat. with the cover (30). Canopy assembly: 164 kg 30-26 PC58UU-3...
  • Page 486 Bring the work equipment to the mini- mum turning position and stop the engine. Loosen and tighten the hydraulic tank cap (42) to release any existing pres- sure so that pressure, with a full tank, will be applied. 30-27 PC58UU-3...

  • Page 487: Removal

    2. Disconnect five hoses including the left right swing hose (4) from above the swing motor (3). Disconnect the hose from the front below the boom foot. Attach male or female plugs to the removed hoses and nipples. 30-28 PC58UU-3...

  • Page 488: Installation

    After removing the swing motor, try to and in full operation to check if the swing prevent foreign matter from entering the system is normal. motor. 2. Connect the five hoses including the hoses (4) from the swing motor (3). 30-29 PC58UU-3...

  • Page 489: Revolving Frame Assembly

    (2) with a lifting strap. Remove the 11 bolts and lift the canopy away. Canopy assembly: 164 kg 4. Remove the cover (9) below the boom foot, the rear cover (10), the foot pin cover (11) and 2 grease nipples (12) in this order. 30-30 PC58UU-3...
  • Page 490 Remove the bracket (24) from the work equip- onto it. Cut off the binding bands holding the ment hose. electrical harness (17). Remove the harness from the bracket and move the harness toward the boom top. 30-31 PC58UU-3...
  • Page 491 (33) and lift the cylinder assembly away. Cylinder assembly: 70 kg 11. Lift the work equipment assembly tempo- rarily, install tool V1 to the boom foot pin (28) and pull out the pin. Work equipment assembly: 900 kg 30-32 PC58UU-3...
  • Page 492 15. Disconnect the lubrication hose (34) from the frame assembly away. swing circle and remove the nipple (35). Revolving frame assembly: 2,200 kg approx. 16. Remove the right and left bolts from the mounting bracket (37) and remove the engine hood (36). 30-33 PC58UU-3...
  • Page 493 Then, swing circle outer race (39), and temporarily install the hoses (32). secure all bolts. Boom cylinder assembly: 70 kg Mounting bolts: Grease the LT-2. Tighten the bolts permanently when the machine can be moved. 30-34 PC58UU-3...
  • Page 494 Coat the pin sliding surface with LM-P bracket (24) for the work equipment hose. during reassembly. Use hyper white grease, and refill the grease until the dust seals at both ends are full. Change the position of boom foot section, and add the grease. 30-35 PC58UU-3...
  • Page 495 16. Install cover (5), front cover (4)(horn), and right side cover (6). 13. Install separation cover (14) at the side of bat- tery, and install the rubber seals. Plug har- ness connector (13) into socket (potentiometer sensor for the work equip- ment). 30-36 PC58UU-3...
  • Page 496 18. Position the engine hood (36) and install bolts of right and left bracket (37) to secure the hood, 19. Remove cap (40) from the hydraulic tank, check and fill the oil, as required. Connect the negative (-) battery cable (41) to the battery terminal. 30-37 PC58UU-3...

  • Page 497: Removal

    Threads of mounting bolts: cle assembly. Grease the LT-2. Swing circle assembly: Approx. 72 kg Mounting bolt: 98 to 122.6 Nm (10 to 12.5 kgm) Grease the internal gear with plenty of G2-L1. Point 3 is the machine body front side. 30-38 PC58UU-3...

  • Page 498: Removal

    3. Insert steel pipes in spaces between the rub- ber shoes (2) and rollers, then rotate the sprocket in the reverse direction. If the rubber shoe is raised from the idler by the steel pipes, slide the shoe off sideways. Rubber shoe assembly: 222 kg 30-39 PC58UU-3...

  • Page 499: Road Liner Iron Shoe Assembly

    If it is difficult to release the road liner shoe (3), move the machine forward and backward to release the shoe. 30-40 PC58UU-3...

  • Page 500: Installation

    2. Install the seal, align the pin hole, and install master pin (1) using tool R. Dust seal and each end of master pin: Grease the G2-LI. 30-41 PC58UU-3...

  • Page 501: Swing Machinery Assembly

    (8), and remove 3 shafts from carrier (3). Remove shaft (8) first, then remove the pin from the shaft. 2. Remove No. 1 sun gear (2) and No. 1 plane- tary gear carrier assembly (3). 30-42 PC58UU-3...
  • Page 502 8. Remove 2 spacers (20). assembly (10). Remove 3 snap rings (14) using snap ring pliers. Then, remove 3 thrust 9. Remove output shaft assembly (21) using washers (15), 3 needle bearings, 3 thrust push tool washers, and thrust plate (17). 30-43 PC58UU-3...

  • Page 503: Assembly

    10. Remove bearing inner race (22) from shaft (23), and remove seal (24). 11. Remove bearing inner race (25) from case assembly (26). 12. Remove bearing outer race (27) from case (28). 13. Remove bearing outer race (29), and remove oil seal (30). 30-44 PC58UU-3...
  • Page 504 Press-fit bearing inner race (25) using tool F5. Press-fitting pressure: 5.0 to 13.33 kN (0.51 to 1.36 tons) Press-fit the bearing inner race gradually by rotating the case. 30-45 PC58UU-3...
  • Page 505 (15)(total 3 needle bearings). Using snap ring pliers, install 3 snap rings (14) to complete carrier assembly (10). Use new snap rings only. Do not open the opening more than 7 mm when installing the snap ring. 30-46 PC58UU-3...
  • Page 506 Refill the oil until it reaches the top sur- face of No. 1 planetary gear snap ring. 13. Install swing motor assembly (1), and tighten the 5 mounting bolts to the specified torque. Tightening torque of bolts: 98 to 123 Nm (10 to 12.5 kgm) 30-47 PC58UU-3...
  • Page 507 3. Remove spacer (4), and remove 4 plugs (6) from shaft (5). Also, remove one similar plug from the head of shaft (5). 6. Remove one O-ring (10) and 8 slipper seals (11) from the inside of rotor (7). 30-48 PC58UU-3...

  • Page 508: Center Swivel Joint Assembly

    Use a plastic hammer or equivlent, and slightly tap the shaft to insert it into the rotor. Take care not to damage the O- ring. 3. Install 15 nipples (9) on shaft (5) and rotor (7). 30-49 PC58UU-3...

  • Page 509: Idler Cushion Assembly

    (11), O-ring (12) and ring (13) from cylinder compressed by a large force. This is a (10). dangerous operation if the tool is set incorrectly. Compress the recoil spring until you can loosen the nut. Spring compression force: 26.9 kN (274.8 kg) 30-50 PC58UU-3...
  • Page 510 2. Attach spring (6) and bracket (5) to the cylin- der and set it on the press table. Rubber shoe Road liner, Iron shoe 42.4 {4,326} 26.9 {2,748} Assemble the cylinder so that the lock bolt is fastened from above. 30-51 PC58UU-3...

  • Page 511: Assembly

    After tightening the valve, confirm that degreasing thoroughly. the grease fitting faces the outer side of Apply engine oil (EO30-CD) to the sliding the machine body. surface of the floating seal, making sure that there are no contaminants. 30-52 PC58UU-3...
  • Page 512 4. Install the O-ring on shaft (5), then install it in the support (6). Insert the lock bolt for the Mounting bolt: apply LT-2 shaft and tighten it to the specified torque. Mounting bolt: apply LT-2 Mounting bolt: 90.8 Nm (10.0-12.5 kgm) Install cover (1). 30-53 PC58UU-3...

  • Page 513: Installation Of Track Roller Assembly

    163.5 Nm (16.7 kgm) or lower. 3. Install floating seal (4) to collars (1) and (2) using tool L4. Clean the O-ring and the contacting sur- face of the O-ring, and let them dry thor- oughly after degreasing. 30-54 PC58UU-3...

  • Page 514: Installation Of Carrier Roller Assembly

    4. Press fit cap (1) using tool L7. Cap press fit depth a: 10 mm 2. Press fit dust seal (4) onto roller (6) using tool L6. Fill roller (7) with grease. Grease in the roller: 30 cc (Albania EP-2 or equivalent) 30-55 PC58UU-3...

  • Page 515: Installation Of Hydraulic Cylinder Assembly

    6. Install wear ring (7). Take care not to widen the abutment joint 3. Secure dust seal (12) using snap ring (11). of the ring too much. Install rod packing (13), then install O-ring (10) and backup ring/O-ring (9). 30-56 PC58UU-3...
  • Page 516 1.42 ± 0.14 kNm {145 ± 14.5 kgm} Thoroughly bleed air during the first oper- ation after assembling the cylinder. For the first 3 to 5 strokes, do not relieve both extending and retracting sides of the cyl- inder at the strokes end. 30-57 PC58UU-3...

  • Page 517: Assembly Of Work Equipment Valve (Notes)

    (42), seal (43), sleeve (44), O-ring (45), ring (46), O-ring (47). Main relief valve (14): 49 - 58.8 Nm {5 - 6 kgm} Twelve suction safety valves (12) and suction valves (15): 39.2 - 49 Nm {4 - 5 kgm} 30-58 PC58UU-3...
  • Page 518 (76), seal (77), sleeve (78), O-ring (79), hours after tightening the plugs. ring (80), O-ring (81). Make sure that the spool is assembled in the correct direction. Plug screw: Loctite (No. 638) Plug: 14.7 - 19.6 Nm {1.5 - 2.0 kgm} 30-59 PC58UU-3...
  • Page 519 1.3 - 1.7 Nm {0.13 - 0.17 kgm} 9. Tighten the mounting bolt of valve cover (27) and stud bolt (29) and the nut to valve block (28) to the specified torque. Bolt and nut: 29.4 - 34.3 Nm {3 - 3.5 kgm} 30-60 PC58UU-3...
  • Page 520 ELECTRICAL CIRCUIT DIAGRAM (1/2) Serial No.: 20424 – 22000......90-11 ELECTRICAL CIRCUIT DIAGRAM (2/2) Serial No.: 20424 – 22000......90-13 ELECTRICAL CIRCUIT DIAGRAM (1/2) Serial No.: 22001 and up......90-15 ELECTRICAL CIRCUIT DIAGRAM (2/2) Serial No.: 22001 and up......90-17 90-1 PC58UU-3...
  • Page 521 HYDRAULIC CIRCUIT DIAGRAM 1: For Serial No. 22001 and up 90-3 PC58UU-3...

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