Komatsu Utility PC12R-8 Series Shop Manual
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Komatsu Utility PC12R-8 Series Shop Manual

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Summary of Contents for Komatsu Utility PC12R-8 Series

  • Page 3 CONTENTS 10 STRUCTURE AND FUNCTION ..........10-1 20 TESTING AND ADJUSTING .
  • Page 4 00-2 PC12R-8 PC15R-8...
  • Page 5 The affected pages are indicated by the use of the following marks. It is requested that necessary ac- Mark Indication Action required tions be taken to these pages according to table below. Page to be newly Replace Page to be replaced Discard Page to be delete Pages having no marks are those previously revised...
  • Page 6 Time of Time of Time of Time of Time of Mark Page Mark Page Mark Page Mark Page Mark Page revision revision revision revision revision 30-11 30-68 30-12 30-69 30-13 30-70 30-14 30-71 30-15 30-72 30-16 30-73 30-17 30-74 30-18 30-75 30-19 30-76...
  • Page 7 Proper service and repair is extremely important for the safe operation of your machine. The service and repair techniques recommended by Komatsu Utility and describe in this manual are both effective and safe methods of operation. Some of these operations require the use of tools specially designed by Komatsu Utility for the purpose.
  • Page 8 13. Before starting work, remove the leads from the 24. Take sure when removing or installing tracks. battery. Always remove the lead from the negative When removing the track, the track separates ( ± ) terminal first. suddenly, so never let anyone stand at either end of the track.
  • Page 9 This section gives the judgement standards when inspecting disassembled parts. NOTICE The specifications contained in this shop manual are subject to change at any time and without any notice. Contact your Komatsu Utility distributor for the latest information. 00-5 PC12R-8 PC15R-8...
  • Page 10 DISTRIBUTION AND UPDATING Special safety precautions are ne- Any additions, amendments or other changes will cessary when performing be sent to Komatsu Utility distributors. work. Get the most up-to-date information before you start any work. Safety Extra special safety precautions...
  • Page 11 HOISTING INSTRUCTIONS HOISTING INSTRUCTIONS ing, and a serious accident can result. Heavy parts (25 kg or more) must be lifted Hooks have maximum strength at the middle with a hoist etc. In the Disassembly and As- portion. sembly section, every part weighing 25 kg or more is clearly indicated with the symbol 1.
  • Page 12 STANDARD TIGHTENING TORQUE STANDARD TIGHTENING TORQUE The following charts give the standard tightening torques of bolts and nuts. Exceptions are given in sections of «Dis- assembly and Assembly». 1. STANDARD TIGHTENING TORQUE OF BOLTS AND NUT Width across flat (mm) Thread diameter Pitch of of bolts...
  • Page 13 - 12 20w5 78.5w19.6 20w5 196.2w49 COATING MATERIALS The recommended coating materials prescribed in Komatsu Utility Shop Manuals are listed below: Nomenclature Code Applications Loctite 222 Used for low resistance locking of screws, check nuts and adjustment nuts. To prevent the loosening of bolts, nuts and plugs and the leakage of oil. Used for...
  • Page 14 ELECTRIC WIRE CODE CABLE ELECTRIC WIRE CODE In the wiring diagrams various colours and symbols are employed to indicate the thickness of wires. This wire code table will help you understand WIRING DIAGRAMS. Example: R -N 1.5 indicates a cable having a nominal number 1.5 and red coating with black stripe. CLASSIFICATION BY THICKNESS Copper wire Nominal...
  • Page 15 WEIGHT TABLE This weight table is a guide for use when transporting or handling components. Unit: kg Machine model PC12R-8 PC15R-8 From serial no. F31605- F22426- Engine assembly (dry) Engine Engine support Power train Pump Radiator - exchanger Revolving frame Cabin Canopy Seat support...
  • Page 16 TABLE OF OIL AND COOLANT QUANTITIES < AMBIENT TEMPERATURE CAPACITY ( KIND OF RESERVOIR ±20 ±10 30ëC FLUID Specified Refill SAE 10W SAE 20W-20 Crankcase sump SAE 30 SAE 40 SAE 10W Hydraulic circuit Final drive SAE 10W (each) Fuel tank Ð...
  • Page 17 GROUP...

  • Page 19: Table Of Contents

    STRUCTURE AND FUNCTION Power train Control valve PC12R-8..........2 PC15R-8 .
  • Page 20 POWER TRAIN PC12R-8 RKP00010 1. Swing motor 6. Swivel joint 2. Swing circle 7. Travel motor 3. Track shoe idler 8. Engine 4. Control valve 9. Hydraulic pump 5. Travel increment valve (optional) 10-2 PC12R-8 PC15R-8...
  • Page 21 PC15R-8 RKP00020 1. Swing motor 6. Swivel joint 2. Swing circle 7. Travel motor 3. Track shoe idler 8. Engine 4. Control valve 9. Hydraulic pump 5. Travel increment valve 10-3 PC12R-8 PC15R-8...
  • Page 22 SWING CIRCLE Sezione B -B Section B - B Sezione A - A Section A - A Sezione C - C Section C - C Sezione D- D RKP00510 Section D - D 1. Outer race 2. Ball bearing 3. Inner race 4.
  • Page 23 SWING MOTOR RKP00940 Safety valve SPECIFICATIONS: Displacement: 195 cc/rev. a - T Port - To hydraulic tank b - B Port - From control valve (B2 Port) c - A Port - From control valve (A2 Port) 10-5 PC12R-8 PC15R-8...

  • Page 24: Final Drive

    FINAL DRIVE The figure represent PC12R-8) RKP00800 1. Crankcase SPECIFICATIONS 2. N . 2 reduction gear PC12R-8 3. N . 1 reduction gear Reduction ratio: 1 ± 31.77 4. N . 1 sun gear PC15R-8 5. Cover Reduction ratio: 1 ± 37.22 6.

  • Page 25: Track Frame And Recoil Spring

    TRACK FRAME AND RECOIL SPRING For steel shoe Sezione A - A RKP00550 Section A - A 1. Track frame 6. Guard 2. Upper idler 7. Final drive 3. Sprocket 8. Track shoe idler 4. Lower idler 9. Recoil spring 5.

  • Page 26: Rubber Shoe

    For rubber shoe Sezione A - A RKP00560 Section A - A 1. Track frame 5. Track shoe idler 2. Upper idler 6. Shoe 3. Sprocket 7. Final drive 4. Lower idler 8. Grease nipple 10-8 PC12R-8 PC15R-8...
  • Page 27 VARIABLE GAUGE TRACK FRAME AND RECOIL SPRING RKP11340 Sezione A - A Section A - A 1. Track frame 7. Variable gauge track 2. Upper idler 8. Variable gauge track cylinder 3. Sprocket 9. Final drive 4. Lower idler 10. Track shoe idler 5.

  • Page 28: Rubber Shoe

    CARRIER ROLLER For steel shoe RKP00030 For rubber shoe RKP00040 1. Bearing 4. Roller 2. Spacer 5. Shaft 3. Seal 6. Snap ring 10-10 PC12R-8 PC15R-8...
  • Page 29 STEEL SHOE RKP00050 1. Link shoe 5. Bushing 2. Shoe 6. Master pin 3. Cotter pin 7. Master housing 4. Pin 10-11 PC12R-8 PC15R-8...
  • Page 30 PAGE INTENTIONALLY LEFT BLANK 10-12 PC12R-8 PC15R-8...

  • Page 31: Hydraulic System Pc12R-8

    HYDRAULIC SYSTEM PC12R-8 1. Bucket cylinder 2. Arm cylinder 3. Boom cylinder 4. Boom swing cylinder 5. Cutting shovel solenoid valve 6. Servocontrol solenoid valve 7. R.H. PPC valve 8. Oil cooler 9. L.H. PPC valve 10. Hydraulic pump 11. Hydraulic tank 12.
  • Page 32 PAGE INTENTIONALLY LEFT BLANK 10-14 PC12R-8 PC15R-8...

  • Page 33: Hydraulic System Pc15R-8

    HYDRAULIC SYSTEM PC15R-8 1. Bucket cylinder 2. Arm cylinder 3. Boom cylinder 4. Boom swing cylinder 5. Cutting shovel solenoid valve 6. Servocontrol solenoid valve 7. R.H. PPC valve 8. Oil cooler 9. L.H. PPC valve 10. Hydraulic pump 11. Hydraulic tank 12.
  • Page 34 PAGE INTENTIONALLY LEFT BLANK 10-16 PC12R-8 PC15R-8...

  • Page 35: Hydraulic Circuit Diagram Pc12R-8

    HYDRAULIC CIRCUIT DIAGRAM PC12R-8 L.H. PPC valve R.H. PPC valve 100 mesh 100 mesh Open R.H. swing Close arm L.H. swing Lower Open Raise Curled boom bucket boom bucket Swing Left 30 kg/cm Cylinder block Additional equipment 0,35 Swing Right Accumulator Swing motor Boom...
  • Page 36 PAGE INTENTIONALLY LEFT BLANK 10-18 PC12R-8 PC15R-8...

  • Page 37: (With Travel Increment)

    HYDRAULIC CIRCUIT DIAGRAM PC12R-8 MISTRAL (with travel increment) L.H. PPC valve R.H. PPC valve 100 mesh 100 mesh Open Raise R.H. swing Close arm L.H. swing Curled Lower Open boom bucket boom bucket Swing Left 30 kg/cm Cylinder block Additional equipment Swing Right...
  • Page 38 PAGE INTENTIONALLY LEFT BLANK 10-20 PC12R-8 PC15R-8...

  • Page 39: Hydraulic Circuit Diagram (Equipment)

    HYDRAULIC CIRCUIT DIAGRAM PC12R-8 HS (with variable gauge undercarriage) R.H. PPC valve L.H. PPC valve 100 mesh 100 mesh R.H. swing Open Close arm L.H. swing Raise Curled Lower Open boom bucket boom bucket Swing Left 30 kg/cm Cylinder block Additional equipment 0,35...
  • Page 40 PAGE INTENTIONALLY LEFT BLANK 10-22 PC12R-8 PC15R-8...
  • Page 41 HYDRAULIC CIRCUIT DIAGRAM PC12R-8 MISTRAL HS (with variable gauge undercarriage and travel increment) R.H. PPC valve L.H. PPC valve 100 mesh 100 mesh Curled Lower Open Raise R.H. swing Open Close arm L.H. swing bucket boom bucket boom Swing Left 30 kg/cm Cylinder block Additional...
  • Page 42 PAGE INTENTIONALLY LEFT BLANK 10-24 PC12R-8 PC15R-8...
  • Page 43 HYDRAULIC CIRCUIT DIAGRAM PC15R-8 L.H. PPC valve R.H. PPC valve 100 mesh 100 mesh R.H. swing Close arm L.H. swing Open Curled Lower Open Raise bucket boom bucket boom Swing Left 30 kg/cm Cylinder block Additional equipment Swing Right Swing motor Oil cooler Boom swing...
  • Page 44 PAGE INTENTIONALLY LEFT BLANK 10-26 PC12R-8 PC15R-8...
  • Page 45 HYDRAULIC CIRCUIT DIAGRAM PC15R-8 HS (with variable gauge undercarriage) L.H. PPC valve R.H. PPC valve 100 mesh 100 mesh Raise R.H. swing Open Close arm L.H. swing Curled Lower Open boom bucket boom bucket Swing Left 30 kg/cm Cylinder block Additional equipment Swing...
  • Page 46 HYDRAULIC CIRCUIT DIAGRAM Equipment line Standard Additional equipment PPC valve Hammer Control valve Hydraulic tank RKP11361 Optional Additional equipment PPC valve Control valve Hydraulic tank Additional equipment control valve L.H. port R.H. port RKP11371 10-28 PC12R-8 PC15R-8...

  • Page 47: Hydraulic Pump

    HYDRAULIC PUMP PC12R-8 Delivery Suction ( P3 ) ( P2 ) ( P1 ) Rotation View Z RKP00831 a - S Port - From hydraulic tank SPECIFICATIONS b - P3 Port - To control valve (Pi1 Port) Type: 1Px110/1Px0.45/1Px0.30 c - P2 Port - To control valve (P2 Port) Theorical displacement: 11+4.5+3.0 cc/rev d - P1 Port...
  • Page 48 PC15R-8 View X Vista X RKP00060 P1 P2 RKP00320 a - P1 Port - To control valve (P Port) SPECIFICATIONS b - P2 Port - To control valve (Pi1 Port) Type: PVK - OB - 16 c - PLS Port - From control valve (LS Port) Displacement: 16 cc+2.75 cc...
  • Page 49 Sezione A - A Section A - A RKP00070 1. Input shaft 8. Spring 2. Rocker pin 9. Adjustment screw 3. Adjustment screw 10. Joint 4. Swash plate 11. Control piston 5. Piston 12. Sliding shoe 6. Cylinder block 13. Adjustment screw 7.
  • Page 50 1. Operation . This pump has the functions of load response con- trol and constant horsepower control. There are nine pistons (2) assembled inside cylin- der block (1), and the face is in contact with valve plate (3). Suction port A and discharge port B are provided in valve plate (3).
  • Page 51 . If the discharge pressure rises further, the angle of swash plate (4) becomes smaller. When this hap- pens, the length of the arm applying total piston for- ce F1 is reduced from a to a', so a larger force F1 is needed for the angle of swash plate (4).

  • Page 52: Control Valve

    CONTROL VALVE PC12R-8 PC12R-8 MISTRAL (with travel increment) Pb1 Pb2 A1 P2 A3 A4 A5 A6 A7 A8 RKP00122 10-34 PC12R-8 PC15R-8...
  • Page 53 A1 Port - To arm cylinder (Head side) A2 Port - To swing motor (A Port) A3 Port - To swivel joint (D Port) A4 Port - To swivel joint (C Port) A5 Port - To boom cylinder (Bottom side) A6 Port - To bucket cylinder (Bottom side) A7 Port...

  • Page 54: Control Valve

    CONTROL VALVE PC12R-8 HS (with variable gauge undercarriage) PC12R-8 MISTRAL HS (with variable gauge undercarriage and travel increment) Pb1 Pb2 A1 P2 A3 A4 A5 A6 A7 A8 RKP00122 10-36 PC12R-8 PC15R-8...
  • Page 55 A1 Port - To arm cylinder (Head side) A2 Port - To swing motor (A Port) A3 Port - To swivel joint (5 Port) A4 Port - To swivel joint (6 Port) A5 Port - To boom cylinder (Bottom side) A6 Port - To bucket cylinder (Bottom side) A7 Port...
  • Page 56 Sezione A - A RKP00130 Section A - A 1. Suction valve (Boom lower) 2. Suction valve (Boom L.H. swing) 3. Suction valve (Boom raise) 4. Suction valve (Arm close) 5. Safety valve 10-38 PC12R-8 PC15R-8...
  • Page 57 Sezione B - B RKP00140 Section B - B 1. Spool (Arm) 6. Spool (Bucket) 2. Spool (Swing) 7. Spool (Blade) 3. Spool (L.H. travel) 8. Spool (Boom swing) 4. Spool (R.H. travel) 9. Main relief valve 5. Spool (Boom) 10-39 PC12R-8 PC15R-8...
  • Page 58 Sezione C - C Section C - C RKP00150 1. Check valve REDUCING PRESSURE COMPENSATION VALVE 2. Unload valve 10. Blade 11. Bucket FLOW COMPENSATION VALVE 12. Boom 3. Arm 13. L.H. travel 4. L.H. travel 14. R.H. travel 5. R.H. travel 15.
  • Page 59 Sezione D- D Sezione E- E Section E - E Section D - D Sezione F- F Sezione G- G Section F - F RKP00160 Section G - G 1. Check valve 8. Suction valve 2. Cooler check valve 9. Reducing pressure compensation valve 3.
  • Page 60 Sezione H - H Sezione J - J Section H - H Section J - J Sezione K - K Sezione L - L Section K - K Section L - L RKP00170 TRAVEL VALVE BUCKET VALVE 1. Spool 10. Spool 2.
  • Page 61 Sezione M - M Section M - M Sezione N - N Sezione O - O RKP00180 Section N - N Section O - O BOOM SWING AND HAMMER VALVE 1. Spool (Boom swing) 4. Plug 2. Suction valve 5. Cover 3.

  • Page 62: Clss

    CLSS 1. OUTLINE FEATURES The term "CLSS" stands for the "Closed Center Load Sensing System" which has the following features. a) Fine-controllability not affected by loads. b) Controllability enabling digging even in the control mode. c) Complex operability ensured by flow distribution determined according to the opening areas of spools during complex operation.
  • Page 63 2. BASIC PRINCIPLE 1) Flow control of unload valve . The unload valve maintains LS differential pressure DP which is differential pressure between the pump di- scharge pressure P and the LS pressure P at the outlet port of control valve (actuator load pressure) at a con- stant level.
  • Page 64 2) Pressure compensation control . Valves (pressure compensation valves) are installed at the inlet port side of the spools of the control valves to balance the loads. When the actuators are complex-operated, the pressure differences DP at the upstream (inlet) and downstream (outlet) are made equal by these valves.
  • Page 65 3. Funzionamento per ogni circuito e valvola SCHEMA IDRAULICO E NOME DELLE VALVOLE 1. Unload valve: (LS pressure+19.6 (LS+20 kg/cm 2. Safety valve: 186 bar (190 kg/cm Hammer 3. Pressure compensation valve 4. Suction valve 5. Main relief valve: Boom 206 bar (210 kg/cm swing 6.
  • Page 66 1. Unload valve FUNCTION 1) In the case of fixed pump system, the Unload valve has functions included variable pump and LS valve of varia- ble pump system. . When the control valve is at HOLD, pump discharge amount Q is released to the tank circuit. .
  • Page 67 2) When control valve is operated, pump discharge pressure P is set to LS pressure P +19,6 bar (20 kg/cm To actuator RKP00361 OPERATION Control valve operated . When the control valve is operated, LS pressure is generated and acts on area S3 at the right end of spool (1).
  • Page 68 3) Engine speed sensing function . All the pump discharge amount Q flows through the orifice (3) of spool (1). On the fixed pump system, the relation between engine speed and pump di- scharge amount Q is in proportion. Therefore when engine speed is high, pump discharge amount is much, and little pump discharge amount flows at engine speed low.
  • Page 69 2. Introduction of LS pressure FUNCTION . The LS pressure is the actuator load pressure at the outlet port end of the control valve. . It actually reduces pump pressure P at reducing valve (3) of the pressure compensation valve to the same pres- sure as actuation circuit pressure A, and sends it to the LS circuit P .
  • Page 70 RKP00621 2) Boom swing, blade valve . As a result, pump pressure P is reduced at notch . When boom swing spool (1) is operated, pump d, becomes the actuator circuit pressure, and is pressure P is reduced by reducing valve (3) (in sent to LS circuit P the same way as in item 1), and is sent to the LS The boom swing and blade valves are different...
  • Page 71 (PA) RKP00631 3) Hammer valve . When hammer spool (6) is operated, pump pressu- re P flows through flow control valve (2), passage e, and notch a in hammer spool (6) to actuator cir- cuit A. . At the same time, actuator circuit pressure P pas- ses through check valve (8) and is interconnected with the LS circuit P...
  • Page 72 3. LS bypass plug FUNCTION . It releases the residual pressure of LS pressure P . It makes the speed of the rise in pressure of LS pressure P more gentle. In addition, with this discarded throt- tled flow, it creates a pressure loss in the throttled flow of the spool and increases the stability by lowering the effective LS differential pressure.
  • Page 73 4. Pressure compensation valve FUNCTION . During compound operations, if the load pressure becomes lower than the other actuator and the oil flow tries to increase, compensation is received. (When this happens, the other actuator being used for compound operation (right side) is at a higher load than the actuator on this side (left side)).
  • Page 74 5. Area ratio of pressure compensation valve FUNCTION . The pressure compensation valve determines the compensation characteristics by carrying out fine adjustment of the area ratio (S1/S2) between area S2 of reducing valve (1) and area S1 of flow control valve (2) to match the characteristics of each actuator.
  • Page 75 6. Throttling LS introduction of pressure compensation valve FUNCTION . If the other actuator is relieved during compound operations, LS introduction throttle b of reducing valve (1) di- vides the flow and sends more oil to the side receiving compensation. Side receiving Side providing compensation...
  • Page 76 7. L.H., R.H. travel junction circuit FUNCTION . To compensate for any difference in the oil flow in the left and right travel circuits when travelling in a straight line, the junction circuit opens when the left and right travel spools are operated. In this way, the flow of oil to the left and right travel motors is almost the same when travelling in a straight line, so there is no travel deviation.
  • Page 77 LEFT TRAVEL RIGHT TRAVEL RKP00432 Steering when travelling . When travelling in a straight line, if left travel spool (1L) is returned to the neutral position and the stee- ring is operated, a difference (AR>AL) is genera- ted in the load pressure of left and right travel ac- tuator circuits P and P , and LS pressure P...
  • Page 78 8. Servocontrol reducing valve FUNCTION . This valve set servocontrol pressure to 29.5 bar (30 kg/cm To servocontrol solenoid valve Gear pump RKP00641 OPERATION . The discharge pressure from the gear pump ente- ring chamber A acts on the bottom of valve (1). The gear pump discharge pressure is set to 29.5 bar (30 kg/cm 10-60...
  • Page 79 PAGE INTENTIONALLY LEFT BLANK 10-61 PC12R-8 PC15R-8...
  • Page 80 CONTROL VALVE PC15R-8 Pb1 Pb2 B1 B2 B3 B4 B5 B6 B7 B8 RKP00192 10-62 PC12R-8 PC15R-8...
  • Page 81 A1 Port - To arm cylinder (Head side) A2 Port - To swing motor (A Port) A3 Port - To swivel joint (D Port) A4 Port - To swivel joint (C Port) A5 Port - To boom cylinder (Bottom side) A6 Port - To bucket cylinder (Bottom side) A7 Port...
  • Page 82 PC15R-8 HS (with variable gauge undercarriage) Pb1 Pb2 B1 B2 B3 B4 B5 B6 B7 B8 RKP00192 10-64 PC12R-8 PC15R-8...
  • Page 83 A1 Port - To arm cylinder (Head side) A2 Port - To swing motor (A Port) A3 Port - To swivel joint (5 Port) A4 Port - To swivel joint (6 Port) A5 Port - To boom cylinder (Bottom side) A6 Port - To bucket cylinder (Bottom side) A7 Port...
  • Page 84 Sezione A - A Section A - A RKP00200 1. Suction valve (Boom lower) 2. Suction valve (Boom L.H. swing) 3. Suction valve (Boom raise) 4. Suction valve (Arm close) 5. Safety valve 10-66 PC12R-8 PC15R-8...
  • Page 85 Sezione B - B RKP00210 Section B - B 1. Spool (Arm) 6. Spool (Bucket) 2. Spool (Swing) 7. Spool (Blade) 3. Spool (L.H. travel) 8. Spool (Boom swing) 4. Spool (R.H. travel) 9. Main relief valve 5. Spool (Boom) 10-67 PC12R-8 PC15R-8...
  • Page 86 Sezione C - C Section C - C RKP00220 1. Check valve 10. Spool (Hammer) 2. Unload valve REDUCING PRESSURE COMPENSATION VALVE FLOW COMPENSATION VALVE 11. Blade 3. Arm 12. Bucket 4. Swing 13. Boom 5. L.H. travel 14. R.H. travel 6.
  • Page 87 Sezione E- E Sezione D- D Section D - D Section E - E Sezione F- F Section F - F Sezione G- G Section G - G RKP00230 1. Check valve SWING VALVE 2. Cooler check valve 12. Spool 3.
  • Page 88 Sezione H - H Sezione J - J Section H - H Section J - J Sezione K - K Sezione L - L Section L - L RKP00240 Section K - K TRAVEL VALVE BUCKET VALVE 1. Spool 10. Spool 2.
  • Page 89 Sezione M-M Section M - M Sezione N-N Sezione O-O Section N - N Section O - O RKP00250 BOOM SWING AND HAMMER VALVE 1. Spool (Boom swing) 4. Plug 2. Suction valve 5. Cover 3. Spool (Hammer) 6. Reducing valve (Servocontrol) 10-71 PC12R-8 PC15R-8...

  • Page 90: Clss

    CLSS 1. OUTLINE FEATURES The term "CLSS" stand for the "Closed Center Load Sensing System" which has the following features. a) Fine-controllability not affected by loads. b) Controllability enabling digging even in the fine control mode. c) Complex operability ensured by flow distribution determined according to the opening areas of spools during complex operation.
  • Page 91 2. BASIC PRINCIPLE 1) Control of pump swash plate angle . The pump swash plate angle (pump discharge amount) is so controlled that the LS differential pressure DP which is the difference between the pump discharge pressure P and the LS pressure P at the outlet port of the control valve (actuator load pressure), is maintained at a constant level.
  • Page 92 2) Pressure compensation control . Valves (pressure compensation valves) are installed at the inlet port side of the spools of the control valves to balance the loads. When the actuators are complex-operated, the pressure differences DP at the upstream (inlet) and downstream (outlet) are made equal by these valves.
  • Page 93 3. Funzionamento per ogni circuito e valvola SCHEMA IDRAULICO E NOME DELLE VALVOLE 1. Unload valve LS+19.6 (LS+20 kg/cm 2. Safety valve: 206 bar (210 kg/cm 3. Pressure compensation val- Hammer 4. Suction valve 5. Main relief valve: 235 bar (240 kg/cm Boom swing 6.
  • Page 94 1. Unload valve FUNCTION 1) When the control valve is at HOLD, pump discharge amount Q discharged by the minimum swash plate angle is released to the tank circuit. When this happens, pump discharge pressure P is set to 19.6 bar (20 ) by spring (2) inside the valve.
  • Page 95 2) During fine control of the control valve, when the demand flow for the actuator is within the amount discharged by the minimum swash plate angle of the pump, pump discharge pressure P is set to LS pressure +19.6 bar (20 kg/cm When the difference in pressure between pump discharge pressure P and LS pressure P...
  • Page 96 3) When the control valve is being operated and the demand flow for the actuator becomes greater than the pump discharge from the minimum swash plate angle, the flow of the oil out, to tank circuit T is shut off, and all of pump discharge amount Q flows to the actuator circuit.
  • Page 97 2. Introduction of LS pressure FUNCTION . The LS pressure is the actuator load pressure at the outlet port end of the control valve. . It actually reduces pump pressure P at reducing valve (3) of the pressure compensation valve to the same pres- sure as actuation circuit pressure A, and sends it to the LS circuit P .
  • Page 98 RKP00620 2) Boom swing, blade valve . When boom swing spool (1) is operated, pump . As a result, pump pressure P is reduced at notch pressure P is reduced by reducing valve (3) (in d, becomes the actuator circuit pressure, and is the same way as in item 1), and is sent to the LS sent to LS circuit P circuit P...
  • Page 99 (PA) RKP00630 3) Hammer valve . When breaker spool (6) is operated, pump pressure flows through flow control valve (2), passage e, and notch a in hammer spool (6) to actuator circuit . At the same time, actuator circuit pressure P pas- ses through check valve (8) and is interconnected with the LS circuit P...
  • Page 100 LS by-pass plug FUNCTION . It releases the residual pressure of LS pressure P . It makes the speed of the rise in pressure of LS pressure P more gentle. In addition, with this discharge throt- tled flow, it creates a pressure loss in the throttled flow of the spool or shuttle valve, and increases the stability by lowering the effective LS differential pressure.
  • Page 101 4. Pressure compensation valve FUNCTION . During compound operations, if the load pressure becomes lower than the other actuator and the oil flow tries to increase, compensation is received. (When this happens, the other actuator being used for compound operation (right side) is at a higher load than the actuator on this side (left side)).
  • Page 102 5. Area ratio of pressure compensation valve FUNCTION . The pressure compensation valve determines the compensation characteristics by carrying out fine adjustment of the area ratio (S2/S1) between area S2 of reducing valve (1) and area S1 of flow control valve (2) to match the characteristics of each actuator.
  • Page 103 6. Throttling LS introduction of pressure compensation valve FUNCTION . In the other actuator is relieved during compound operations, LS introduction throttle b of reducing valve (1) di- vides the flow and sends more oil to the side receiving compensation. Side receiving Side providing compensation...
  • Page 104 7. L.H., R.H. travel junction circuit FUNCTION . To compensate for any difference in the oil flow in the left and right travel circuits when travelling in a straight line, the junction circuit opens when the left and right travel spools are operated. In this way, the flow of oil to the left and right travel motors is almost the same when travelling in a straight line, so there is no travel deviation.
  • Page 105 LEFT TRAVEL RIGHT TRAVEL RKP00433 Steering when travelling . When travelling in a straight line, if left travel spool (1L) is returned to the neutral position and the stee- ring is operated, a difference (AR>AL) is genera- ted in the load pressure of left and right travel ac- tuator circuits P and P , and LS pressure P...
  • Page 106 8. Servocontrol reducing valve FUNCTION . This valve set servocontrol pressure to 29.5 bar (30 kg/cm To servocontrol solenoid valve Gear pump RKP00641 OPERATION . The discharge pressure from the gear pump ente- ring chamber A acts on the bottom of valve (1). The gear pump discharge pressure is set to 29.5 bar (30 kg/cm 10-88...

  • Page 107: Swivel Joint

    SWIVEL JOINT PC12R-8 Section A - A Sezione A - A RKP00261 Section B - B Sezione B - B 1. Shaft f Port - To blade cylinder (Boom side) 2. Seal g Port - Not used 3. Body A Port - From control valve (B4 Port) 4.

  • Page 108: Pc12R-8 Mistral (With Travel Increment)

    PC12R-8 MISTRAL (with travel increment) PC15R-8 Section A - A Sezione A - A RKP00261 Section B - B Sezione B - B 1. Shaft f Port - To blade cylinder (Bottom side) 2. Seal g Port - To travel motor (PS Port) 3.

  • Page 109: Pc12R-8 Hs

    PC12R-8 HS (with variable gauge undercarriage) PC12R-8 MISTRAL HS (with travel increment and variable gauge undercarriage) PC15R-8 HS (with variable gauge undercarriage) Section A - A Sezione A - A RKP11330 6 Port - From control valve (A4 Port) 7 Port - From control valve (B3 Port) 8 Port - From EV3 solenoid valve (A Port)

  • Page 110: Travel Motor

    TRAVEL MOTOR PC12R-8 Sezione A - A RKP00861 Section A - A 1. Valve plate R.H. motor 2. Cylinder T1 Port - Not used 3. Piston P1 Port - To swivel joint (a Port) 4. Shoe P2 Port - To swivel joint (c Port) 5.

  • Page 111: Pc12R-8

    PC12R-8 (with travel increment) PC15R-8 Section A - A Sezione A - A RKP00872 10-93 PC12R-8 PC15R-8...
  • Page 112 Section C - C Sezione B - B Sezione C - C Section B - B RKP00882 1. Valve plate R.H. motor 2. Piston T1 Port - Not used 3. Shoe P1 Port - From swivel joint (a Port) 4. Swash plate P2 Port - From swivel joint (c Port) 5.

  • Page 113: Cylinders

    CYLINDERS BOOM RKP00290 1. Head side bushing 5. Washer 9. Piston ring 2. Bottom side bushing 6. Cylinder 10. Wear ring 3. Piston rod 7. Ring 11. Piston 4. Head 8. Spacer 12. Nut RKP00300 1. Head side bushing 5. Washer 9.
  • Page 114 BUCKET RKP00310 1. Head side bushing 5. Washer 9. Piston 2. Bottom side bushing 6. Cylinder 10. Nut 3. Piston rod 7. Piston ring 4. Head 8. Wear ring BOOM SWING RKP04660 1. Head side bushing 5. Washer 9. Piston 2.
  • Page 115 BLADE (PC12R-8) RKP00310 1. Head side bushing 5. Wear ring 9. Wear ring 2. Bottom side bushing 6. Washer 10. Piston 3. Piston rod 7. Cylinder 11. Nut 4. Head 8. Piston ring BLADE (PC15R) RKP04660 1. Head side bushing 5.

  • Page 116: Variable Gauge Undercarriage

    VARIABLE GAUGE UNDERCARRIAGE RKP11300 1. Head side bushing 5. Washer 9. Piston 2. Bottom side bushing 6. Cylinder 10. Nut 3. Piston rod 7. Piston ring 4. Head 8. Wear ring PC12R-8 Boom Variable Cylinder Bucket Boon swing Blade gauge with canopy with cabin undercarriage...

  • Page 117: Valve Control

    VALVE CONTROL The figure represent PC15R-8) RKP01050 Position of control levers 1. Blade control lever 2. L.H. PPC valve Raise boom 3. L.H. safety lock lever Lower boom 4. Servocontrol feed unit Open bucket 5. Work equipment control pedal Curl bucket 6.

  • Page 118: Accumulator

    ACCUMULATOR RKP00700 TECHNICAL DATA FUNCTION . An elastic rubber bag (1) containing nitrogen is fit- Servocontrol feed unit ted inside the accumulator to maintain oil pressure Nominal volume: 0.35 in the circuit to which the accumulator is connec- Pre-loading: ted. Working pressure: 35 ±...

  • Page 119: Ppc Valve

    PPC VALVE Left Only HS versions RKP11601 4 Port - To control valve (Pa1 Port) FUNCTION 3 Port - To control valve (Pb2 Port) 1 Port: R.H. swing 2 Port - To control valve (Pb1 Port) 2 Port: Close arm P Port - From EV1 solenoid valve (A Port) 3 Port: L.H.
  • Page 120 Right RKP11610 P Port - From EV1 solenoid valve (A Port) FUNCTION 1 Port - To control valve (Pa6 Port) 1 Port: Curl bucket T Port - To hydraulic tank 2 Port: Lower boom 4 Port - To control valve (Pa5 Port) 3 Port: Open bucket 3 Port - To control valve (Pb6 Port)
  • Page 121 PPC VALVE (hammer, cutting shovel) 100 Mesh RKP00950 Front machine Sezione A - A RKP00960 a. T Port - To hydraulic tank 1. Spool b. P Port From control valve (Pi2 Port) 2. Adjusting spring (internal) P1 Port - Hammer control: Not used 3.
  • Page 122 FUNCTION 1. At neutral Ports A and B of the control valve and ports P1 and P2 of the PPC valve are connected to drain cham- ber D through fine control hole f in spool (1). (Fig. 1) Control valve RKP00971 Fig.
  • Page 123 3. During fine control (when the lever is returned) When lever (5) starts to be returned, spool (1) is pushed up by the force of centering spring (3) and the pressure at port P1. When this happens, fine control hole f is connected to drain chamber D and the pressure oil at port P1 is released.

  • Page 124: Solenoid Valve

    SOLENOID VALVE SERVOCONTROL PC12R-8 PC12R-8 HS RKP00850 a. T Port - To hydraulic tank b. P Port - From control valve (Pi2 Port) c. A Port - To PPC valves (P Port) 1. EV1 Servocontrol 10-106 PC12R-8 PC15R-8...
  • Page 125 SERVOCONTROL PC12R-8 MISTRAL - PC12R-8 MISTRAL HS PC15R-8 - PC15R-8 HS ] UP TO SERIAL NUMBER: PC12R-8 - N. F31768 PC15R-8 - Në F22588 RKP00810 a. S Port - To accumulator 1. EV1 Servocontrol b. A Port - To PPC valves (P Port) 2.
  • Page 126 SERVOCONTROL PC12R-8 MISTRAL - PC12R-8 MISTRAL HS PC15R-8 - PC15R-8 HS ] FROM SERIAL NUMBER: PC12R-8 - N. F31769 PC15R-8 - Në F225889 RKP11590 a. S Port - To accumulator 1. EV1 Servocontrol b. A Port - To PPC valves (P Port) 2.
  • Page 127 VARIABLE GAUGE UNDERCARRIAGE SERVOCONTROL (FOR VERSION HS) RKP11310 a. P Port - Dal distributore (B7 Port) 1. EV3 solenoid valve (optional equipment L.H. side) b. B Port - To swivel joint (2 Port) c. A Port - To swivel joint (8 Port) 10-109 PC12R-8 PC15R-8...

  • Page 128: Safety Valve

    SAFETY VALVE BLADE (with variable gauge undercarriage) RKP11320 a. C2 Port - To blade cylinder (Bottom side) b. V2 Port - From swivel joint (3 Port) c. C1 Port - From swivel joint (8 Port) 10-110 PC12R-8 PC15R-8...

  • Page 129: Cutting Shovel Control Valve

    CUTTING SHOVEL CONTROL VALVE RKP11320 a. T Port - From control valve (A9 Port) b. P Port - To hydraulic tank c. A Port - To attachment (Left side) d. B Port - To attachment (Right side) e. a Port - From PPC valve (Hammer) (P2 Port) f.
  • Page 130 PAGE INTENTIONALLY LEFT BLANK 10-112 PC12R-8 PC15R-8...

  • Page 131: Electrical Circuit Diagram

    ELECTRICAL CIRCUIT DIAGRAM 10 microF A1.5 A1.5 A1.5 A1.5 B-R1 B-R1 SPIA CANDELETTE M0.8 N0.8 S-N1.5 G0.8 LIVELLO GASOLIO R1.5 ACC. B-N0.8 OFFACC R-C1 R-C1 MAX TEMPERATURA H O C-N0.8 H-R1 R0.8 L-R1 L-B1 SPIA ALTERNATORE S0.8 PRESSIONE OLIO R0.8 L-G0.8 A2.5 Z-G2.5...
  • Page 133 GROUP...
  • Page 135 TESTING AND ADJUSTMENTS Normal or standard technical data ....2 Control and regulation of the pressures in the hydraulic circuits (PC15R-8) ......40 Special tools .

  • Page 136: Normal Or Standard Technical Data

    NORMAL OR STANDARD TECHNICAL DATA . FOR THE ENGINE Machine model PC12R-8 Engine 3D68E-N3FA Standard Permissible Check item Test Condition Unit value value High idling 2620w25 Ð Engine speed Low idling 1390w25 Ð Rated speed 2450 Ð At sudden acceleration Max.
  • Page 137 . FOR THE ENGINE PC15R-8 3D68E-N3FB Standard Permissible value value 2780w25 Ð 1390w25 Ð 2600 Ð Max. 7.0 Max. 0.7 0.20 Ð 0.20 Ð 33w1 26w1 (250) (250) Max. 120ë Max. 120ë 14w1 Ð 10±15 Ð 20-3 PC12R-8 PC15R-8...
  • Page 138 . FOR THE MACHINE Machine model PC12R-8 Classifi- Standard Permissible Check item Test Condition Unit cation value value Hydraulic oil temperature: 45 ± 55ëC Cooling circuit: in correct range Engine speed with Engine oil pressure: in correct range one pump at max. pressure Bucket circuit: max.
  • Page 139 . FOR THE MACHINE PC15R-8 Standard Permissible value value < < 65 ± 85 65 ± 85 65 ± 85 65 ± 85 50 ± 70 17 ± 23 70 ± 100 50 ± 70 Max. 5 Max. 8 Max. 10 Max.
  • Page 140 . FOR THE MACHINE Machine model PC12R-8 Classifi- Standard Permissible Check item Test Condition Unit cation value value Boom lever 1.7 ± 2.3 Arm lever 1.7 ± 2.3 Engine speed: high idling Hydraulic oil temperature: 45 ± 55ëC Instrument coupling at centre Bucket lever 1.7 ±...
  • Page 141 . FOR THE MACHINE PC15R-8 Valore Valore Normale Ammesso 1.7 ± 2.3 1.7 ± 2.3 1.7 ± 2.3 1.7 ± 2.3 5.5 ± 7.5 2.5 ± 3.5 1.7 ± 2.3 6 ± 8 5 ± 7 20 ± 30 26 ± 35 210 ±...
  • Page 142 . FOR THE MACHINE Machine model PC12R-8 Classifi- Standard Permissible Check item Test Condition Unit cation value value Work equipment at max. reach Max. 80 Braking angle (Degree) RKP01840 (17ë) (Max. 20ë) No load in bucket Engine speed: high idling Hydraulic oil temperature: 45 ±...
  • Page 143 . FOR THE MACHINE PC15R-8 Standard Permissible value value Max. 84 (18ë) (Max. 21ë) 1.6 ± 2.0 2.8 ± 3.9 32.0 Max. 36.0 Max. 360 (75ë) (Max. 90ë) 20-9 PC12R-8 PC15R-8...
  • Page 144 . FOR THE MACHINE Machine model PC12R-8 Classifi- Standard Permissible Check item Test Condition Unit cation value value Engine speed: high idling Hydraulic oil temperature: 45 ± 55ëC Internal leakage from Max. 1000 Swing lock: engaged swing motor Measure the leakage Pressurize circuit.
  • Page 145 . FOR THE MACHINE PC15R-8 Standard Permissible value value Max. 1000 28.0 28w3 14.0 14w2 34.0 34w4 17.0 17w2 Max. 500 Max. 550 20-11 PC12R-8 PC15R-8...
  • Page 146 . FOR THE MACHINE Machine model PC12R-8 Classifi- Standard Permissible Check item Test Condition Unit cation value value Measuring posture Hydraulic drift of Max. 200 Max. 240 travel motors RKP02000 Engine stopped. Hydraulic oil temperature: 45 ± 55ëC. Machine parked on sloping ground. Measure the drift after 5 minutes Engine speed: high idling Leakage of travel motor...
  • Page 147 . FOR THE MACHINE PC15R-8 Standard Permissible value value Max. 200 Max. 240 Max. 75 Max. 90 Max. 300 Max. 340 Max. 300 Max. 350 Max. 20 Max. 30 Max. 20 Max. 33 Max. 20 Max. 30 Max. 20 Max. 33 Max.
  • Page 148 . FOR THE MACHINE Machine model PC12R-8 Classifi- Standard Permissible Check item Test Condition Unit cation value value Blade (measure the downward RKP01870 Max. 20 Max. 30 movement of the edge of the blade) Engine stopped Hydraulic oil temperature: 45 ± 55ëC Raise the blade to its maximum height and measure the height of the edge from the ground.
  • Page 149 . FOR THE MACHINE PC15R-8 Standard Permissible value value Max. 20 Max. 30 Max. 5 Max. 5 Max. 5 20-15 PC12R-8 PC15R-8...
  • Page 150 . FOR THE MACHINE Machine model PC12R-8 Classifi- Standard Permissible Check item Test Condition Unit cation value value Measuring posture Canopy Canopy Boom 1.6 ± 2.4 Cabin Cabin .... Bucket teeth on the ground Canopy Canopy RKP01820 1.6 ± 2.4 Engine speed: high idling Cylinder fully extended Cabin...
  • Page 151 . FOR THE MACHINE PC15R-8 Standard Permissible value value Canopy Canopy 1.6 ± 2.4 Cabin Cabin .... Canopy Canopy 1.6 ± 2.4 Cabin Cabin .... 2.0 ± 3.0 2.0 ± 3.0 1.8 ± 2.6 1.6 ± 2.4 5.2 ± 7.2 4.8 ±...
  • Page 152 . FOR THE MACHINE Machine model PC12R-8 Classifi- Standard Permissible Check item Test Condition Unit cation value value Measuring posture Boom Max. 2 Max. 2 RKP01910 Engine speed: low idling Hydraulic oil temperature: 45 ± 55ëC With the work equipment fully extended, lower the boom and measure the time ta- ken to raise the machine from when the bucket reaches the ground.
  • Page 153 . FOR THE MACHINE PC15R-8 Standard Permissible value value Max. 2 Max. 2 Max. 2 Max. 2 Max. 2 Max. 2 Max. 1 Max. 1 20-19 PC12R-8 PC15R-8...
  • Page 154 . FOR THE MACHINE Machine model PC12R-8 Classifi- Standard Permissible Check item Test Condition Unit cation value value Theoretical flow /rev Motor speed 2450 Gear pump P1 Test pressure kg/cm Nominal capacity /min Theoretical flow /rev Motor speed 2450 Gear pump P2 Test pressure kg/cm Nominal capacity...
  • Page 155 . FOR THE MACHINE PC15R-8 Standard Permissible value value Ð Ð Ð Ð Ð Ð Ð Ð 2.75 2600 Ð Ð Ð Ð Ð Ð Ð Ð 20-21 PC12R-8 PC15R-8...
  • Page 156 Machine model PC15R-8 Delivery piston pump P1 Classifi- cation Pump speed: 2600 rpm Hydraulic oil temperature: 45 ± 55ëC 107.8 bar 44 /min Maximum delivery 107.8 bar 32 /min 107.8 bar 39 /min 205.8 bar 18 /min 205.8 bar 28 /min Maximum delivery 205.8 bar...

  • Page 157: Special Tools

    TESTING AND ADJUSTMENTS SPECIAL TOOLS SPECIAL TOOLS Measurement check points Symbol Code Name Q.ty Remarks Commercially Valve clearance Feeler gauge Ð available ATR800090 Compression gauge 0-70 kg/cm Compression pressure ATR800130 Adapter Ð ATR800070 Multi-scale tachometer 20 - 4000 rpm Engine speed ATR800060 Stroboscopic tachometer 6 - 30000 rpm...
  • Page 158 PAGE INTENTIONALLY LEFT BLANK 20-24 PC12R-8 PC15R-8...

  • Page 159: Checking The Engine Speed

    TESTING AND ADJUSTMENTS CHECKING THE ENGINE SPEED CHECKING THE ENGINE SPEED When checking the engine rpm , always be very ca- reful not to touch parts that reach high temperatures and not to get entangled in rotating elements. H Check the engine speed after the following conditions have been reached: Temperature of engine cooling water: 68 ±...

  • Page 160: Adjustment Of Valve Clearance

    TESTING AND ADJUSTMENTS ADJUSTMENT OF VALVE CLEARANCE ADJUSTMENT OF VALVE CLEARANCE Adjust the clearance between valve and rockers to the following values: Unit: mm Suction valves Exhaust valves With engine cold 0.20 0.20 1 - Remove the valve cover. 2 - Rotate the drive shaft in the normal direction of rota- tion, until the N .

  • Page 161: Measurement Of The Compression Pressure

    TESTING AND ADJUSTMENTS MEASUREMENT OF THE COMPRESSION PRESSURE MEASUREMENT OF THE COMPRESSION PRESSURE While measuring the compression, take care not to get entangled in the cooling fan, the alternator belt, or in other rotating parts. Check all cylinders. H Test conditions: Engine: at working temperature.
  • Page 162 CONTROL AND ADJUSTMENT OF THE TESTING AND ADJUSTMENTS TENSION OF THE FAN BELT CONTROL AND ADJUSTMENT OF THE TENSION OF THE FAN BELT 1. Checking the tension 1 - Depress the belt (1) at the centre of the section between the alternator (2) and the pulley (3) that drives the water pump.

  • Page 163: Control And Adjustment Of The Injection Timing

    TESTING AND ADJUSTMENTS CONTROL AND ADJUSTMENT OF THE INJECTION TIMING CONTROL AND ADJUSTMENT OF THE INJECTION TIMING H Check the injection timing of the N .1 cylinder by means of the N .1 union of the injection pump. H The cylinders are numbered 1-2-3 counting from the flywheel side.
  • Page 164 TESTING AND ADJUSTMENTS CONTROL AND ADJUSTMENT OF THE INJECTION TIMING 1. Method "A" (Pump separated) 6 - Rotate the injection pump (5) towards the outside or towards the motor, after having loosened the pump (6) retaining nuts. To DELAY the injection, rotate the pump (5) to- wards the outside.

  • Page 165: Control And Adjustment Of The Accelerator Stroke

    TESTING AND ADJUSTMENTS CONTROL AND ADJUSTMENT OF THE ACCELERATOR STROKE CONTROL AND ADJUSTMENT OF THE ACCELERATOR STROKE H Test conditions: Engine: Switched off, but at working temperature. Working equipment: resting on the ground 1 - Remove the top hood (1). RKPA0100 2 - Push the accelerator lever (2) to the end of its stroke in "minimum"...
  • Page 166 ADJUSTMENT OF THE STROKE OF THE TESTING AND ADJUSTMENTS BLADE COMMAND LEVER ADJUSTMENT OF THE STROKE OF THE BLADE COMMAND LEVER H Test conditions: Engine: switched off. Working equipment: resting on the ground. The adjustment, carried out on the power train, is aimed at restoring the position of the command lever, keeping the neutral position of the valve block spool.

  • Page 167: Control And Adjustment Of The Stroke Of

    CONTROL AND ADJUSTMENT OF THE STROKE TESTING AND ADJUSTMENTS OF THE TRAVEL LEVER CONTROL AND ADJUSTMENT OF THE STROKE OF THE TRAVEL LEVER H Test conditions: Engine: switched off. Working equipment: resting on the ground. 1 - Only for machines with a canopy. Remove the rubber mat (1) to gain access to the lever stroke lock-screws.

  • Page 168: Centering Adjustment Of The Boom Swing

    CENTERING ADJUSTMENT OF THE TESTING AND ADJUSTMENTS BOOM SWING COMMAND PEDAL CENTERING ADJUSTMENT OF THE BOOM SWING COMMAND PEDAL H Test conditions: Engine: switched off Working equipment: resting on the ground. 1 - Raise the rubber mat (1) on the right-hand side of the machine.

  • Page 169: Adjustment Of The Rubber Pad And Safety Microswitch For Servo-Control Engagement

    ADJUSTMENT OF THE RUBBER PAD AND SAFETY TESTING AND ADJUSTMENTS MICROSWITCH FOR SERVO-CONTROL ENGAGEMENT ADJUSTMENT OF THE RUBBER PAD AND SAFETY MICROSWITCH FOR SERVO-CONTROL ENGAGEMENT Adjustment of rubber pad H Test conditions: Engine: switched off. Working equipment: resting on the ground. 1 - Remove the grip (1) from the servo-control engage- ment lever, take off the arm-rest (2), and remove the protective cover (3).

  • Page 170: Control And Adjustment Of The Track-Shoe Tension

    TESTING AND ADJUSTMENTS CONTROL AND ADJUSTMENT OF THE TRACK-SHOE TENSION CONTROL AND ADJUSTMENT OF THE TRACK-SHOE TENSION 1. Test H Test conditions: Solid, flat ground. Working equipment: resting on the ground. 1 - Only for machines with rubber track-shoes Move the machine backwards and forwards until the track-shoe joint is uppermost and halfway bet- 100 ÷...

  • Page 171: Control And Regulation Of Pressure In The

    CONTROL AND REGULATION OF PRESSURE TESTING AND ADJUSTMENTS IN THE HYDRAULIC CIRCUITS (PC12R) CONTROL AND REGULATION OF PRESSURE IN THE HYDRAULIC CIRCUITS (PC12R) H Test conditions: PRESSURES IN THE CIRCUITS AND IN THE TANK») and put the safety-engagement levers into Engine: at working temperature.
  • Page 172 CONTROL AND REGULATION OF PRESSURE TESTING AND ADJUSTMENTS IN THE HYDRAULIC CIRCUITS (PC12R) 1. Control of operating pressure (unloading valve) 1 - Remove the plug (1) of pump P1 and mount a pressure adapter. 2 - Connect a pressure gauge E1 (60 bar). 3 - Start the engine and bring it up to high idling with all levers in neutral position.
  • Page 173 CONTROL AND REGULATION OF PRESSURE TESTING AND ADJUSTMENTS IN THE HYDRAULIC CIRCUITS (PC12R) Valve adjustment H The unloading valve cannot be re-adjusted, only sub- stituted. 1. Adjustment of the main relief valve If the pressures measured for the working equipment and machine travel do not fall within normal values, adjust the main relief valve (1) as follows: 1 - Remove the lower casing (2).

  • Page 174: Control And Regulation Of The Pressures In The Hydraulic Circuits (Pc15R-8)

    CONTROL AND REGULATION OF THE PRESSURES TESTING AND ADJUSTMENTS IN THE HYDRAULIC CIRCUITS (PC15R) CONTROL AND REGULATION OF THE PRESSURES IN THE HYDRAULIC CIRCUITS (PC15R) H Test conditions: circuits (see «ELIMINATION OF THE RESIDUAL PRESSURES IN THE CIRCUITS AND IN THE Engine: at working temperature.
  • Page 175 CONTROL AND REGULATION OF THE PRESSURES TESTING AND ADJUSTMENTS IN THE HYDRAULIC CIRCUITS (PC15R) 1. Control of operating pressure (unloading valve) 1 - Remove the plug (1) of pump P1 and mount a pressure adapter. 2 - Connect a pressure gauge E1 (60 bar). 3 - Start the engine and bring it up to high idling with all levers in neutral position.
  • Page 176 CONTROL AND REGULATION OF THE PRESSURES TESTING AND ADJUSTMENTS IN THE HYDRAULIC CIRCUITS (PC15R) Valve adjustment H The unloading valve cannot be re-adjusted, only sub- stituted. 1. Adjustment of the main relief valve If the pressures measured for the working equipment and machine travel do not fall within normal values, adjust the main relief valve (1) as follows: 1 - Remove the lower casing (2).

  • Page 177: Control And Regulation Of The Ls Differential Pressure And Adjustment Of The Ls Valve

    CONTROL AND REGULATION OF THE LS DIFFERENTIAL TESTING AND ADJUSTMENTS PRESSURE AND ADJUSTMENT OF THE LS VALVE CONTROL AND REGULATION OF THE LS DIFFERENTIAL PRESSURE AND ADJUSTMENT OF THE LS VALVE Test 1. Test method with differential pressure gauge E3 1 - Remove the plugs (1) and (2) and mount two pres- sure adapters.
  • Page 178 CONTROL AND REGULATION OF THE LS DIFFERENTIAL TESTING AND ADJUSTMENTS PRESSURE AND ADJUSTMENT OF THE LS VALVE LS valve adjustment If the DP value is not the one indicated, adjust the LS valve (3) as follows: 1 - Disconnect the tube (4). 2 - Loosen the lock nut (5) and turn the adjusting screw (6).

  • Page 179: Regulation Of The Pc Valve

    TESTING AND ADJUSTMENTS REGULATION OF THE PC VALVE REGULATION OF THE PC VALVE H If the engine speed decreases when an increase in pressure or delivery is requested, or when the speed of the working equipment is low, even though the en- gine speed, the delivery pressure and the LS differen- tial pressure are all normal, the PC valve (1) should be regulated as follows:...

  • Page 180: Control And Regulation Of The Servo-Control

    CONTROL AND REGULATION OF THE TESTING AND ADJUSTMENTS SERVO-CONTROL POWER SUPPLY (PC12R) CONTROL AND REGULATION OF THE SERVO-CONTROL POWER SUPPLY (PC12R) H Test conditions: Engine: at working temperature. Hydraulic oil temperature: 45 ± 55 ëC. Before removing the cap to measure the pressure, release the residual pressures from the circuits (See «ELIMINATION OF RESIDUAL PRESSURES OF THE CIRCUIT AND THE TANK») and put the sa-...

  • Page 181: Control And Regulation Of The Servo-Control

    CONTROL AND REGULATION OF THE TESTING AND ADJUSTMENTS SERVO-CONTROL POWER SUPPLY (PC15R) CONTROL AND REGULATION OF THE SERVO-CONTROL POWER SUPPLY (PC15R) H Test conditions: Engine: at working temperature. Hydraulic oil temperature: 45 ± 55 ëC. Before removing the cap to measure the pressure, release the residual pressures from the circuits (See «ELIMINATION OF RESIDUAL PRESSURES OF THE CIRCUIT AND THE TANK») and put the sa-...

  • Page 182: Elimination Of Residual Pressures - Pressurisation

    ELIMINATION OF RESIDUAL PRESSURES - TESTING AND ADJUSTMENTS PRESSURISATION OF THE TANK ELIMINATION OF RESIDUAL PRESSURES - PRESSURISATION OF THE TANK 1. Elimination of pressures from the hydraulic cir- cuits. 1 - Rest the working equipment on the ground and stop the engine.

  • Page 183: Bleeding Air From The Hydraulic Circuits

    TESTING AND ADJUSTMENTS BLEEDING AIR FROM THE HYDRAULIC CIRCUITS BLEEDING AIR FROM THE HYDRAULIC CIRCUITS Sequence of operations or procedures for bleeding the air Procedures for bleeding air Bleeding air Bleeding Bleeding air Bleeding air Starting Pressuris- Starting from pumps air from from swing from travel...
  • Page 184 TESTING AND ADJUSTMENTS BLEEDING AIR FROM THE HYDRAULIC CIRCUITS 2. Bleeding air from the cylinders BOOM CYLINDER 1 - Start the engine and let it run at low idling for about 5 minutes. 2 - Lower and raise the boom 4-5 times. H Lower and raise the piston of the boom up to about 100 mm of the end of its stroke.
  • Page 185 CONTROL OF HYDRAULIC DRIFTS - TESTING AND ADJUSTMENTS ANALYSIS OF THE CAUSES OF A DRIFT CONTROL OF HYDRAULIC DRIFTS - ANALYSIS OF THE CAUSES OF A DRIFT H Test conditions: Machine: in the conditions indicated in the NOR- MAL TECHNICAL DATA. Engine: at working temperature.
  • Page 186 CONTROL OF HYDRAULIC DRIFTS - TESTING AND ADJUSTMENTS ANALYSIS OF THE CAUSES OF A DRIFT 2. Arm test 1 - Position the machine with the arm completely extended and with the bucket teeth on the ground. 2 - Stop the engine and release the residual hy- draulic pressures.
  • Page 187 CONTROL OF HYDRAULIC DRIFTS - TESTING AND ADJUSTMENTS ANALYSIS OF THE CAUSES OF A DRIFT 3. Bucket test 1 - Position the machine with the arm vertical and the bucket resting on the ground in a horizontal position. Put a weight in the bucket, or fill it with earth.
  • Page 188 CONTROL OF HYDRAULIC DRIFTS - TESTING AND ADJUSTMENTS ANALYSIS OF THE CAUSES OF A DRIFT 4. Boom swing test 1 - Position the machine with the boom, arm and bucket raised and with the revolving frame tur- ned 135ë to the left. 2 - Stop the engine and release the residual hy- draulic pressures.
  • Page 189 CONTROL OF HYDRAULIC DRIFTS - TESTING AND ADJUSTMENTS ANALYSIS OF THE CAUSES OF A DRIFT 5. Blade test 1 - Position the machine with the arm resting ver- tically on the ground and with the bucket re- sting on its back. 2 - Raise the blade completely and support it on a centrally-positioned block.
  • Page 190 CONTROL OF HYDRAULIC DRIFTS - TESTING AND ADJUSTMENTS ANALYSIS OF THE CAUSES OF A DRIFT 3 - Disconnect the hoses (1) and (2) from the mo- tor and plug them to prevent entry of impuri- ties. Attach provisional tubes to the motor to catch any oil leakages.
  • Page 191 CHECKING FOR ANY LEAKAGES INSIDE TESTING AND ADJUSTMENTS THE WORKING EQUIPMENT CYLINDERS CHECKING FOR ANY LEAKAGES INSIDE THE WORKING EQUIPMENT CYLINDERS H Test conditions: POSITION FOR THE BOOM TEST Engine: at working temperature. Hydraulic oil: 45 ± 55 ëC. 1 - Fully extend the rod of the cylinder to be checked and stop the engine.
  • Page 192 CHECKING FOR ANY LEAKAGES INSIDE TESTING AND ADJUSTMENTS THE SWING MOTOR CHECKING FOR ANY LEAKAGES INSIDE THE SWING MOTOR H Test conditions: Engine: at working temperature. Hydraulic oil: 45 ± 55ëC. Turret: locked in place with the swing-locking pin. 1 - Disconnect the drainage tube (1) of the motor (2) and plug it.

  • Page 193: Methods For Testing For Leakages Inside The Swivel Joint

    METHODS FOR TESTING FOR LEAKAGES TESTING AND ADJUSTMENTS INSIDE THE SWIVEL JOINT METHODS FOR TESTING FOR LEAKAGES INSIDE THE SWIVEL JOINT H Test conditions: PC12R-8 Engine: at working temperature. Hydraulic oil: 45 ± 55ëC. 1. Functionality test 1 - When a lower actuator (blade, travel motor, travel increment) is found to be defective, one of the possible causes of failure is the swivel joint.
  • Page 194 METHODS FOR TESTING FOR LEAKAGES TESTING AND ADJUSTMENTS INSIDE THE SWIVEL JOINT PC12R-8 HS RKP11380 TABLE B Symbol Line to be controlled (under pressure) Adjacent line (possible leakages) Sym. Blade cylinder, head side - Rise Travel motor to the left - Reverse Variable gauge undercarriage Bottom side - Draining Open...
  • Page 195 METHODS FOR TESTING FOR LEAKAGES TESTING AND ADJUSTMENTS INSIDE THE SWIVEL JOINT PC12R-8 MISTRAL HS PC15R-8 HS RKP11380 TABLE C Symbol Line to be controlled (under pressure) Adjacent line (possible leakages) Sym. Blade cylinder, head side - Rise Draining Variable gauge undercarriage Bottom side - Travel motor to the left - Reverse Open Blade cylinder, head side - Rise...
  • Page 196 METHODS FOR TESTING FOR LEAKAGES TESTING AND ADJUSTMENTS INSIDE THE SWIVEL JOINT PC12R-8 MISTRAL PC15R-8 G Increment of travel speed F Blade cylinder, base side - Descent E Blade cylinder, head side - Rise D Travel motor to the left - Forward C Travel motor to the right - Forward B Travel motor to the left - Reverse A Travel motor to the right - Reverse...
  • Page 197 METHODS FOR TESTING FOR LEAKAGES TESTING AND ADJUSTMENTS INSIDE THE SWIVEL JOINT PC12R-8 (with travel increment) - PC15R-8 3 - Disconnect from the relative actuators the tubes that correspond to the lines adjacent to the one being checked. Plug the disconnected tubes to prevent entry of impurities.
  • Page 199 GROUP...
  • Page 201 REMOVAL AND INSTALLATION HOW TO READ THE MANUAL..... . . 3 HYDRAULIC OIL TANK Removal ..........24 PRECAUTIONS TO BE TAKEN WHILE WORKING 4 Installation.
  • Page 202 SWING CIRCLE ARM CYLINDER Removal ......... . . 43 Removal .

  • Page 203: How To Read The Manual

    REMOVAL AND INSTALLATION HOW TO READ THE MANUAL HOW TO READ THE MANUAL 1. Removal and Installation of the groups (1) The procedures and information needed to carry out the work of removing or Installing units or groups are given in the removal procedure. The sequence of operations is not repeated in the installation procedure. (2) Information needed for installation is marked with the symbol .

  • Page 204: Precautions To Be Taken While Working

    REMOVAL AND INSTALLATION PRECAUTIONS TO BE TAKEN WHILE WORKING PRECAUTIONS TO BE TAKEN WHILE WORKING H When dismantling or installing a part, always take the following general precautions. 1. Precautions for removal operations If not otherwise indicated, lower the work equipment until it rests on the ground. If the coolant liquid contains an anti-freeze substance, follow the instructions given for drainage.

  • Page 205: Special Tools

    REMOVAL AND INSTALLATION SPECIAL TOOLS SPECIAL TOOLS Nature of work Symbol Code Description Q.ty Notes Removal - installation ATR200460 Equipment For master pin of steel track shoe Disassembly - assembly Removal - installation ATR200720 Equipment recoil spring recoil spring Equipment for disassembly ATR200620 All cylinders - assembly cylinders...
  • Page 206 REMOVAL AND INSTALLATION SPECIAL TOOLS SPECIAL TOOLS Nature of work Symbol Code Description Q.ty Notes Bushing for piston é 50 Bushing for piston é 55 Disassembly - assembly Assembling cylinders piston - cylinder ATR201190 Bushing for piston é 60 ATR201200 Bushing for piston é...
  • Page 207 REMOVAL AND INSTALLATION STARTER MOTOR REMOVAL OF THE STARTER MOTOR Disconnect the negative terminal cable (-) from the battery. 1 - Tip up the seat (1) and take out the toolbox (2). RKPA0480 2 - Disconnect the electric wiring (4) from the starter mo- tor (3).

  • Page 208: Alternator

    REMOVAL AND INSTALLATION ALTERNATOR REMOVAL OF THE ALTERNATOR Disconnect the negative terminal cable (-) from the battery. 1 - Tip up the seat (1) and take out the toolbox (2). RKPA0480 2 - Disconnect the connector (3). RKPA0500 3 - Loosen and take out the screws (4) and (5). 4 - Remove the alternator (6).

  • Page 209: Pump Group

    REMOVAL AND INSTALLATION PUMP GROUP REMOVAL OF THE PUMP GROUP Disconnect the negative terminal cable (-) from the battery. 1 - Remove the suction filter group (1) and the suppor- ting bracket (2). RKPA0520 2 - Close the filter cock (3). 3 - Remove the fuel return tubes (4) from the injection nozzles.

  • Page 210: Injection Nozzles

    REMOVAL AND INSTALLATION INJECTION NOZZLES REMOVAL OF THE INJECTION NOZZLES 1 - Remove the suction filter (1) and the supporting brac- ket (2). RKPA0520 2 - Remove the high-pressure pipes (3) and the fuel re- turn tubes (4). 3 - Remove the complete injection nozzles (5). RKPA0550 INSTALLATION OF THE INJECTION NOZZLES...
  • Page 211 REMOVAL AND INSTALLATION CYLINDER HEAD REMOVAL OF THE CYLINDER HEAD Disconnect the negative terminal cable (-) from the battery. H Drain the engine coolant. Coolant: Approx. 3.2 1 - Remove the engine hood (1), the expansion chamber (2) and the relative supporting bracket. 2 - Remove the complete air filter (3) together with its support.

  • Page 212: Cylinder Head

    REMOVAL AND INSTALLATION CYLINDER HEAD 8 - Remove the fan cover (13) and disconnect the fan- cooling conveyor (14) from the radiator (15). 9 - Disconnect the engine coolant tubes (16) and (17) from the pump. RKPA0590 10 - Remove the right-hand rear panel (18). 11 - Remove the oil-cooler (19) and put it to one side.
  • Page 213 REMOVAL AND INSTALLATION CYLINDER HEAD 17 - Remove the high-pressure pipes (29). 18 - Disconnect the glow plug supply cable (30). 19 - Remove the valve tappet cover (31). RKPA0551 20 - Remove the rocker-arm shaft (32). H Loosen the lock nuts and unscrew the valve tap- pets by 2-3 turns.
  • Page 214 REMOVAL AND INSTALLATION CYLINDER HEAD INSTALLATION OF THE CYLINDER HEAD To install, reverse the removal procedure. 1 - Fill up the cooling circuit. Coolant: approx. 3.2 2 - Start the engine to circulate the liquid through all cir- cuits. Stop the engine and check the level. H Only for machines with cab heating Make sure that the heating cock is open.

  • Page 215: Removal

    REMOVAL AND INSTALLATION OIL COOLER REMOVAL OF THE OIL COOLER Completely lower the working equipment until it is re- sting on the ground and stop the engine. Release all residual pressures from the circuits and the tank. (For details, see «20. CONTROLS AND AD- JUSTMENTS»).
  • Page 216 REMOVAL AND INSTALLATION RADIATOR REMOVAL OF THE RADIATOR Completely lower the working equipment until it is re- sting on the ground and stop the engine. Release all residual pressures from the circuits and the tank. (For details, see «20. CONTROLS AND AD- JUSTMENTS»).

  • Page 217: Engine Hood

    REMOVAL AND INSTALLATION ENGINE HOOD REMOVAL OF THE ENGINE HOOD Completely lower the working equipment until it is re- sting on the ground and stop the engine. 1 - Block the engine hood (1) in its raised position, take out the screws (2) that fasten the hinge (3) to the fra- me and remove the hood.

  • Page 218: Cab And Canopy

    REMOVAL AND INSTALLATION CAB AND CANOPY REMOVAL OF CAB AND CANOPY Completely lower the working equipment until it is re- sting on the ground and stop the engine and take out the ignition key. 1. Removal of the canopy 1 - Attach the canopy (1) to some hoisting tackle. 2 - Loosen and remove the screws (2) and (3).

  • Page 219: Installation

    REMOVAL AND INSTALLATION CAB AND CANOPY 5 - Remove the rear shelf (9). RKPA0690 6 - Attach the cab (10) to some hoisting tackle. 7 - Loosen and remove the front and rear screws (11) and nuts (12). 8 - Remove the cab (10). RKPB5970 INSTALLATION OF CANOPY AND CAB...
  • Page 220 REMOVAL AND INSTALLATION HEATING FAN REMOVAL OF THE HEATING FAN Completely lower the working equipment until it is re- sting on the ground and stop the engine and take out the ignition key. H Drain the engine coolant. Coolant: approx. 3.2 1 - Disconnect the connector (1).
  • Page 221 REMOVAL AND INSTALLATION REAR COUNTERWEIGHT REMOVAL OF THE REAR COUNTERWEIGHT Completely lower the working equipment until it is re- sting on the ground and stop the engine. 1 - Remove the rear side grills (1) and (2). 2 - Remove the hood fastener (3). 3 - Loosen the counterweight screws (4) to eliminate the tightening torque.

  • Page 222: Top Cover And Side Panels

    REMOVAL AND INSTALLATION TOP COVER AND SIDE PANELS REMOVAL OF THE TOP COVER AND SIDE PANELS Completely lower the working equipment until it is re- sting on the ground, stop the engine and take out the ignition key. 1. Top cover 1 - Remove the arm-rests (1).

  • Page 223: Installation

    REMOVAL AND INSTALLATION TOP COVER AND SIDE PANELS 7 - Take out the screws and partially raise the casing (10), disconnect the ignition key and dashboard il- lumination connectors (11) and (12). 8 - Lift off the casing (10) by raising it from the front. RKPA0780 2.

  • Page 224: Hydraulic Oil Tank

    REMOVAL AND INSTALLATION HYDRAULIC OIL TANK REMOVAL OF THE HYDRAULIC OIL TANK Completely lower the working equipment until it is re- sting on the ground and stop the engine. Release all residual pressures from the circuits and the tank. (For details, see «20. CONTROLS AND AD- JUSTMENTS»).

  • Page 225: Installation

    REMOVAL AND INSTALLATION HYDRAULIC OIL TANK 8 - Tip up the seat and remove the toolbox. Disconnect the drainage tubes (13) and (14) from the tank. RKPA0840 9 - Take out the screws (15) and remove the tank (16). Tank: 16 kg RKPA0850 INSTALLATION OF THE HYDRAULIC OIL TANK To install, reverse the removal procedure.
  • Page 226 REMOVAL AND INSTALLATION HYDRAULIC OIL TANK H Carefully check the condition of the O-ring seal. 1 - Fill up the hydraulic oil to its maximum level. Hydraulic oil: approx. 22 2 - Start the engine at low idling to circulate the oil throu- ghout the system.

  • Page 227: Fuel Tank

    REMOVAL AND INSTALLATION FUEL TANK REMOVAL OF THE FUEL TANK Completely lower the working equipment until it is re- sting on the ground and stop the engine. H Drain the fuel. Fuel: max. 20 1 - Remove the engine hood (1) and the right-hand side panel (2).

  • Page 228: Engine-Pump Group

    REMOVAL AND INSTALLATION ENGINE-PUMP GROUP REMOVAL OF THE ENGINE-PUMP GROUP Completely lower the working equipment until it is re- sting on the ground and stop the engine. Release all residual pressures from the circuits and the tank. (For details, see «20. CONTROLS AND AD- JUSTMENTS»).
  • Page 229 REMOVAL AND INSTALLATION ENGINE-PUMP GROUP 6 - Remove the tail-pipe (10), and clamps (11) screwed onto the flywheel cover, the suction filter (12) and the muffler (13). 7 - Disconnect the fuel supply and return tubes (14) and (15) from the fuel filter. H Plug the tubes to prevent entry of impurities.

  • Page 230: Installation

    REMOVAL AND INSTALLATION ENGINE-PUMP GROUP INSTALLATION OF THE ENGINE-PUMP GROUP To install, reverse the removal procedure. Muffler screws and nuts: 23 ± 29 Nm H Adjust the accelerator stroke. (For details, see «20. CONTROLS AND ADJUSTMENTS»). Vibration-damping nuts: ....Nm 1 - Fill the tank with hydraulic oil up to the maximum le- vel.

  • Page 231: Installation

    REMOVAL AND INSTALLATION PUMP REMOVAL OF THE PUMP Lower the working equipment until it is resting on the ground and stop the engine. Release all residual pressures from the circuits and the tank. (For details, see «20. CONTROLS AND AD- JUSTMENTS»).

  • Page 232: Engine-Pump Coupling

    REMOVAL AND INSTALLATION ENGINE-PUMP COUPLING REMOVAL OF ENGINE-PUMP COUPLING Lower the working equipment until it is resting on the ground and stop the engine. 1 - Remove the pump. (For details, see «REMOVAL OF THE PUMP»). 2 - Remove the flywheel cover (1). (8 screws). 3 - Take out the screws (2) and remove the coupling (3).
  • Page 233 REMOVAL AND INSTALLATION CONTROL VALVE REMOVAL OF THE CONTROL VALVE Lower the working equipment until it is resting on the ground and stop the engine. Release all residual pressures from all circuits and from the tank. (For details, see «20. CONTROLS AND ADJUSTMENTS»).

  • Page 234: Control Valve

    REMOVAL AND INSTALLATION CONTROL VALVE 9 - Put a sling around the control valve group and con- nect it to some hoisting tackle. H Adjust the length of the cables to balance the group. 10 - Take out the screws (15) and remove the control val- ve group complete with its support.

  • Page 235: Right-Hand Ppc Valve

    REMOVAL AND INSTALLATION RIGHT-HAND PPC VALVE (BOOM-BUCKET) REMOVAL OF RIGHT-HAND PPC VALVE (BOOM-BUCKET) Lower the working equipment until it is resting on the ground, stop the engine and remove the ignition key. Release all residual pressures from all circuits and from the tank.
  • Page 236 REMOVAL AND INSTALLATION LEFT-HAND PPC VALVE (ARM-BUCKET) REMOVAL OF LEFT-HAND PPC VALVE (ARM-BUCKET) Lower the working equipment until it is resting on the ground, stop the engine and remove the ignition key. Release all residual pressures from all circuits and from the tank.

  • Page 237: Servocontrol Solenoid Group (Pc12R)

    SERVOCONTROL SOLENOID GROUP REMOVAL AND INSTALLATION (PC12R without travel increment) REMOVAL OF THE SERVOCONTROL SOLENOID GROUP (PC12R without travel increment) Lower the working equipment until it is resting on the ground, and stop the engine. Release all residual pressures from all circuits and from the tank.

  • Page 238: (Pc12R With Travel Increment - Pc15R)

    SERVO-CONTROL SOLENOID GROUP REMOVAL AND INSTALLATION (PC12R with travel increment - PC15R) REMOVAL OF THE SERVO-CONTROL SOLENOID GROUP (PC12R with travel increment - PC15R) Lower the working equipment until it is resting on the ground, stop the engine and remove the ignition key. Release all residual pressures from all circuits and from the tank.

  • Page 239: Swivel Joint

    REMOVAL AND INSTALLATION SWIVEL JOINT REMOVAL OF THE SWIVEL JOINT Lower the working equipment until it is resting on the ground, and stop the engine. Release all residual pressures from all circuits and from the tank. (For details, see «20. CONTROLS AND ADJUSTMENTS»).

  • Page 240: Swing Motor

    REMOVAL AND INSTALLATION SWING MOTOR REMOVAL OF THE SWING MOTOR Insert the turret-locking device and lower the working equipment until it is resting on the ground. Stop the engine. Release all residual pressures from all circuits and from the tank. (For details, see «20. CONTROLS AND ADJUSTMENTS»).
  • Page 241 REMOVAL AND INSTALLATION REVOLVING FRAME REMOVAL OF THE REVOLVING FRAME Lower the working equipment until it is resting on the ground, and stop the engine. Release all residual pressures from all circuits and from the tank. (For details, see «20. CONTROLS AND ADJUSTMENTS»).

  • Page 242: Revolving Frame

    REMOVAL AND INSTALLATION REVOLVING FRAME 15 - Loosen and remove the two turret screws (7) left in position for safety. 16 - Remove the evolving frame. Complete turret: 620 kg INSTALLATION OF THE REVOLVING FRAME To install, reverse the removal procedure. Turret screws: Loctite 262 Turret screws: 66w7 Nm 1 - Refill the hydraulic tank.

  • Page 243: Removal

    REMOVAL AND INSTALLATION SWING CIRCLE REMOVAL OF THE SWING CIRCLE 1 - Remove the evolving frame (For details, see «REMO- VAL OF THE REVOLVING FRAME»). 2 - Take out the screws (1) that secure the swing circle (2). 3 - Remove the swing circle (2). Swing circle: 20 kg RKPA1170 INSTALLATION OF THE...

  • Page 244: Removal

    REMOVAL AND INSTALLATION TRAVEL MOTOR REMOVAL OF THE TRAVEL MOTOR Lower the working equipment until it is resting on the ground, and stop the engine. Release all residual pressures from all circuits and from the tank. (For details, see «20. CONTROLS AND ADJUSTMENTS»).

  • Page 245: Removal

    REMOVAL AND INSTALLATION RUBBER TRACK SHOES REMOVAL OF RUBBER TRACK SHOES 1 - Rotate the turret by 90ë to the side of the track-shoe to be removed and rest the back of the bucket on the ground with the arm perpendicular to the ground. 2 - Slowly loosen the grease nipple (1) to let out the grea- se and release the tension of the track-shoe (2).

  • Page 246: Removal

    REMOVAL AND INSTALLATION TRACK-SHOES REMOVAL OF TRACK-SHOES 1 - Rotate the track-shoe until the connecting pin (1) is above the horizontal axis of the idler (2). 2 - Slowly loosen the grease nipple to let out the grease and release the tension of the track-shoe. The grease contained in the idler cylinder is under pressure and could seriously injure the Operator.

  • Page 247: Sprocket Wheel

    REMOVAL AND INSTALLATION SPROCKET WHEEL REMOVAL OF THE SPROCKET WHEEL 1 - Remove the track-shoe. (For details, see «REMOVAL OF TRACK-SHOES»). 2 - Rotate the turret 90ë away from the side of the wheel to be removed. 3 - Push down with the boom perpendicular to the ground and raise the lower track-frame.
  • Page 248 REMOVAL AND INSTALLATION COMPLETE FINAL DRIVE REMOVAL OF THE COMPLETE FINAL DRIVE PC12R-8 1 - Remove the sprocket wheel (For details, see «REMO- VAL OF THE SPROCKET WHEEL»). 2 - Disconnect the tubes (1) from the travel motor. Plug the tubes and the motor fittings to prevent entry of im- purities.
  • Page 249 REMOVAL AND INSTALLATION FINAL DRIVE DISASSEMBLY OF THE FINAL DRIVE RKP05400 1 - After taking off the caps (1) and draining the oil from the final drive, remove the snap ring (2) and shoulder that secure the outer cover (3). RKPA1690 2 - Insert a socket wrench into the cavity (1) of the oil-re- filler cap.
  • Page 250 REMOVAL AND INSTALLATION FINAL DRIVE 3 - Take the O-ring (5) off the housing (4). RKPA1710 4 - Extract the no. 1 planetary gear (or sun-gear) (6). RKPA1720 5 - Extract the planetary carrier (7) from the no. 1 plane- tary gear.
  • Page 251 REMOVAL AND INSTALLATION FINAL DRIVE 7 - Using a puller, take out the four planetary groups (9) of the no. 2 planetary gear. NOTE. Note down the assembly side. RKPA1750 8 - Remove the snap ring (10) from the hydraulic motor seating (11).
  • Page 252 REMOVAL AND INSTALLATION FINAL DRIVE 11 - Remove the first half-seal (13) from the hydraulic mo- tor (11). RKPA1790 12 - Remove the second half-seal (13) from the housing (4). RKPA1800 13 - Remove the spacer (14) from the housing (4). NOTE.
  • Page 253 REMOVAL AND INSTALLATION FINAL DRIVE 15 - Using the tool D4 and a puller, remove the bearing (16) from the housing (4). RKPA1830 NOTES CONCERNING RE-ASSEMBLY 1 - Important points When commencing re-assembly of the final drive, there are a few fundamental rules to be observed: If any gears are damaged, a new complete final drive must be fitted.
  • Page 254 REMOVAL AND INSTALLATION FINAL DRIVE ASSEMBLY OF THE FINAL DRIVE 1 - Position the bearing (16) inside the housing (4). H For PC12R-8 MISTRAL and PC15R-8 Mount the bearing with groove "A" facing up. RKPA1841 2 - Using the tool D4 and a press, push the bearing (16) home in the housing (4).
  • Page 255 REMOVAL AND INSTALLATION FINAL DRIVE 5 - Mount the first half-seal (13) on the tool D2. RKPA1880 6 - Assemble the first half-seal (13) on the housing (4). RKPA1890 7 - Repeat the operation of point 5 for the second half- seal (13) and assemble it on the hydraulic motor (11).
  • Page 256 REMOVAL AND INSTALLATION FINAL DRIVE 9 - Position the housing (4) with the bearing (16) suppor- ted by the tool D3. Position the hydraulic motor (11) and use a press to push it into the housing (4). RKPA1920 10 - Position the centering ring (12) on the hydraulic motor (11) and, using a press and a push rod, press it home.
  • Page 257 REMOVAL AND INSTALLATION FINAL DRIVE 13 - Use the tool D1 and a press to push the differential gear (9) home on the pins of the hydraulic motor. RKPA1950 14 - Mount the snap rings (8). RKPA1740 15 - Install the planetary carrier (7) of the no. 1 planetary gear.
  • Page 258 REMOVAL AND INSTALLATION FINAL DRIVE 17 - Install the O-ring (5) in the housing. RKPA1980 18 - Position the cover (3) and press it home. RKPA1990 19 - Mount the snap ring (2). RKPA2000 20 - Fill up, mount the caps (1) complete with seals, and tighten them.

  • Page 259: Installation

    REMOVAL AND INSTALLATION IDLER AND RECOIL SPRING ASSEMBLY REMOVAL OF IDLER AND RECOIL SPRING ASSEMBLY Rubber track-shoes 1 - Remove the track-shoe (For details, see «REMOVAL OF RUBBER TRACK-SHOES). 2 - Pull the idler (2) and the cylinder (3) out of the lower track-frame (1).
  • Page 260 REMOVAL AND INSTALLATION IDLER DISASSEMBLY OF THE IDLER H When dismantling the idlers, all seals must be substi- tuted. H Remove the cap (1) and drain the oil. Quantity of oil: approx. 20 cc. RKPA1241 1 - Only for steel track-shoes Disconnect the group (3) from the supports (2).

  • Page 261: Disassembly

    REMOVAL AND INSTALLATION SPRING RECOIL AND THRUST CYLINDER GROUPS DISASSEMBLY AND ASSEMBLY OF THE SPRING RECOIL AND THRUST CYLINDER GROUPS 1 - Spring recoil group H First inject grease to remove the piston. Disassembly 1 - Place the group (1) beneath a press on which the tool B1 is mounted.

  • Page 262: Track Rollers

    REMOVAL AND INSTALLATION TRACK ROLLERS REMOVAL OF THE TRACK ROLLERS 1 - Slowly loosen the grease nipple (1) to let out the grea- se and release tension in the track-shoe. The grease contained in the cylinder is under pressure and could seriously injure the Opera- tor.

  • Page 263: Boom Cylinder

    REMOVAL AND INSTALLATION BOOM CYLINDER REMOVAL OF BOOM CYLINDER Fully extend the arm and open the bucket complete- ly. Lower the equipment until it rests on the ground. 1 - Remove the protection (1) and the relative shoes. 2 - Stop the engine, release the pressures in the cylinder by moving the right-hand PPC valve lever several ti- mes.

  • Page 264: Arm Cylinder

    REMOVAL AND INSTALLATION ARM CYLINDER REMOVAL OF THE ARM CYLINDER Completely open the front equipment. Make the ne- cessary movements to rest the bucket teeth on the ground with the arm supported on a block «A». 1 - Stop the engine and release the pressures from the cylinder by moving the left-hand PPC valve lever se- veral times.

  • Page 265: Bucket Cylinder

    REMOVAL AND INSTALLATION BUCKET CYLINDER REMOVAL OF THE BUCKET CYLINDER Completely open the front equipment. Make the ne- cessary movements to rest the bucket teeth on the ground with the arm supported on a block «A». 1 - Stop the engine and release the pressures from the cylinder (1) by moving the right-hand PPC valve lever several times.

  • Page 266: Boom Swing Cylinder

    REMOVAL AND INSTALLATION BOOM SWING CYLINDER REMOVAL OF THE BOOM SWING CYLINDER Lower the working equipment to the ground with all safety devices engaged. Rest the back of the bucket on the ground with the arm in a vertical position. 1 - Stop the engine and move the command pedal seve- ral times to release residual pressures.

  • Page 267: Blade Cylinder

    REMOVAL AND INSTALLATION BLADE CYLINDER REMOVAL OF THE BLADE CYLINDER Lower the working equipment to the ground with all safety devices engaged. Rest the back of the bucket on the ground with the arm in a vertical position. 1 - Remove the protection (1). H Place a supporting block «A»...

  • Page 268: Working Equipment Cylinders

    REMOVAL AND INSTALLATION WORKING EQUIPMENT CYLINDERS DISASSEMBLY OF THE WORKING EQUIPMENT CYLINDERS 1 - Take off the guard rings (1) from both sides of the cy- linder and from the piston rod. H Make sure that the tube unions are not plugged. RKP05230 2 - Place the cylinder (2) on the apparatus C1.
  • Page 269 REMOVAL AND INSTALLATION WORKING EQUIPMENT CYLINDERS 5 - Raise the cylinder and hook the piston rod to the mo- bile group of the tool C1. 6 - Extract the piston rod group (4) from the cylinder. 7 - Remove the cylinder (2) and the piston rod group. RKPA1420 8 - Lock the complete piston rod (4) onto the apparatus 9 - Attach the socket wrench C6 to the lock nut (5) of the...
  • Page 270 REMOVAL AND INSTALLATION WORKING EQUIPMENT CYLINDERS ASSEMBLY OF THE WORKING EQUIPMENT CYLINDERS H Take great care not to damage the seal and the sli- ding surfaces. H Prepare each individual component before commen- cing the final assembly. 1. Assembly of the cylinder head 1 - Position the guard ring (7) and, using a press and the push rod C7, press it home in the head (3).
  • Page 271 REMOVAL AND INSTALLATION WORKING EQUIPMENT CYLINDERS 2. Piston assembly 1 - Using the tool C8, mount the piston seal. Mount in se- quence the rubber ring (13), the outer seal (14) and the anti-extrusion rings (15). 13 14 15 RKPA1460 2 - Mount the guide ring (16).
  • Page 272 REMOVAL AND INSTALLATION WORKING EQUIPMENT CYLINDERS 6 - For the boom cylinders. Boom Blade (PC15R) Mount the brake bushing (21). H For the boom cylinder for the PC12R, also mount 21 22 the spacer (22). H Carefully check the orientation of the chamfer on the brake bushing.
  • Page 273 REMOVAL AND INSTALLATION WORKING EQUIPMENT CYLINDERS 3 - Lubricate the threading and the first part of the cylin- der (2). Cylinder: ASL800050 4 - Mount the two halves of the tool C11, adapted to the diameter, onto the mouthpiece of the cylinder (2). RKPA1510 5 - Mount the piston rod group (4) onto the tool C1 and raise the mobile part up to the end of its stroke.

  • Page 274: Upper Working Equipment

    REMOVAL AND INSTALLATION UPPER WORKING EQUIPMENT REMOVAL OF THE UPPER WORKING EQUIPMENT Fully extend the arm and open the bucket complete- ly. Lower the equipment until it rests on the ground. 1 - Remove the protection (1) and the relative shoes (2). RKPA1291 2 - Stop the engine, release the pressures in the cylinder by moving the PPC valve lever several times.
  • Page 275 REMOVAL AND INSTALLATION UPPER WORKING EQUIPMENT 9 - Disconnect the connector (6) that supplies current to the working spotlight (7), and pull off the power sup- ply cable to the boom. 10- Remove the working spotlight (7) complete with its bracket.
  • Page 276 REMOVAL AND INSTALLATION BUCKET REMOVAL OF THE BUCKET Position the bucket on the ground on a flat surface, and resting on its back. 1 - Take out the safety pin (1) and remove the connecting pin (2) between the bucket (3) and the tie-rods (4). 2 - Take out the safety pin (5) and remove the pin (6) that connects the bucket (3) to the arm (7).

  • Page 277: Arm

    REMOVAL AND INSTALLATION REMOVAL OF THE ARM 1 - Remove the bucket. (For details, see «REMOVAL OF THE BUCKET»). 2 - Remove the bucket cylinder. (For details, see «RE- MOVAL OF THE BUCKET CYLINDER»). 3 - If the machine is designed for the application of optio- nal front working equipment, disengage the tubes (1) from the arm (2) brackets.
  • Page 278 REMOVAL AND INSTALLATION 9 - Stop the engine. 10 - Connect the arm (6) to some hoisting tackle and apply a slight tension to the cable. 11 - Take out the pin (10). 12 - Remove the arm (6). Arm: PC12R: 23 kg PC15R: 25 kg Arm: PC12R: 36 kg PC15R: 38 kg...

  • Page 279: Boom

    REMOVAL AND INSTALLATION BOOM REMOVAL OF THE BOOM Disconnect the negative terminal cable (-) from the battery. 1 - Remove the arm. (For details, see «REMOVAL OF THE ARM»). 2 - Remove the arm cylinder. (For details, see «REMO- VAL OF THE ARM CYLINDER»). 3 - Remove the protection (1) and the relative sliding shoes.
  • Page 280 REMOVAL AND INSTALLATION BOOM 13 - Slide off the boom the tubes (9) of the arm, bucket and attachment cylinders and the cable that supplies current to the working spotlight. 14 - Connect the boom (10) to some hoisting tackle, using the hole provided and apply a slight tension to the ca- bles.

  • Page 281: Boom Swing Support

    REMOVAL AND INSTALLATION BOOM SWING SUPPORT REMOVAL OF THE BOOM SWING SUPPORT Extend the working equipment completely and rest it on the ground. 1 - Remove the front working equipment. (For details, see «REMOVAL OF THE UPPER WORKING EQUIP- MENT»). 2 - Remove the boom cylinder.

  • Page 282: Removal

    REMOVAL AND INSTALLATION BLADE REMOVAL OF THE BLADE 1 - Rotate the turret 90ë and rest the working equipment on the ground. 2 - Disconnect the cylinder from the blade. (For details, see «REMOVAL OF THE BLADE CYLINDER»). 3 - Attach the blade to some hoisting tackle, using the la- teral holes provided (1) and the cylinder attachment (2).
  • Page 283 GROUP...
  • Page 285 STANDARD MAINTENANCE Swing circle..........2 Swivel joint.

  • Page 286: Swing Circle

    SWING CIRCLE 66w7 Nm (6.7w0.7 kgm) 66w7 Nm with Loctite 262 (6.7w0.7 kgm) with Loctite 262 RKP00540 Unit: mm Check item Criteria Remedy Standard clearance Clearance limit Axial bearing clearance Replace Backlash between pinion 0.1 ± 0.5 and swing circle toothing 40-2 PC12R-8 PC15R-8...

  • Page 287: Track Frame And Recoil Spring

    TRACK FRAME AND RECOIL SPRING RKP02020 Unit: mm Check item Criteria Remedy Item Standard size Repair limit Build up by welding Track frame Vertical width of idler guide Build up by Idler support welding or replace Build up by Track frame welding Horizontal width of idler guide...

  • Page 288: Variable Gauge Track Frame And Recoil Spring

    VARIABLE GAUGE TRACK FRAME AND RECOIL SPRING RKP11341 Unit: mm Check item Criteria Remedy Item Standard size Repair limit Build up by welding Track frame Vertical width of idler guide Build up by Idler support welding or replace Build up by Track frame welding Horizontal width of...

  • Page 289: Idler

    IDLER RKP00690 Unit: mm Check item Criteria Remedy Standard size Repair limit Outer diameter of track shoe guide 259.5 Outer diameter of tread Build up by welding or replace Width of track shoe guide Total width Width of tread 18.5 21.5 Tolerance Standard...

  • Page 290: Final Drive

    FINAL DRIVE 37w1.9 Nm 8 ± 12 Nm 75 Nm with Loctite 262 RKP00820 Unit: mm Check item Criteria Remedy Standard clearance Clearance limit Backlash between N planetary gear and housing 0.15 0.35 Backlash between N 0.15 0.35 planetary gear and housing Replace Backlash between .

  • Page 291: Sprocket

    SPROCKET 75 Nm with Loctite 262 RKP00570 Unit: mm Check item Criteria Remedy Standard size Tolerance Repair limit Wear at roots of sprocket teeth ± 2 Wear at tips of Build up by w1.5 sprocket teeth solder or replace Face width at tips of Ð...

  • Page 292: Track Roller

    TRACK ROLLER 75 Nm with Loctite 262 RKP00031 Unit: mm Check item Criteria Remedy Standard size Repair limit Outer diameter of thread Build up by Outer diameter solder or of protusion replace Width of thread Width of protusion Tolerance Standard Standard Interference size...

  • Page 293: Track Shoe

    TRACK SHOE STEEL SHOE RKP00051 Unit: mm Check item Criteria Remedy Standard size Repair limit Replace pin Link pitch and bushing or complete link Grouser height Link height Outer diameter of bushing Tolerance Standard Interference Standard size interference limit Interference between Shaft Hole regular pin and link...
  • Page 294 RUBBER SHOE Sezione B - B Section B - B Sezione A - A Section A - A RKP00330 Unit: mm Check item Criteria Remedy Standard size Repair limit Wear of lug height 23 (25) Widht of sprocket treads Replace Standard size Tolerance Repair limit...

  • Page 295: Hydraulic Pump

    HYDRAULIC PUMP PC12R-8 68.6 Nm (7 kgm) View Z Vista Z 48 Nm RKP00910 (4.9 kgm) 40-11 PC12R-8 PC15R-8...
  • Page 296 PC15R-8 30.4w2.9 Nm (3.1w0.3 kgm) 63.7w4.9 Nm (6.5w0.5 kgm) 57.9w6.9 Nm View Z Vista Z (5.9w0.7 kgm) RKP00061 40-12 PC12R-8 PC15R-8...

  • Page 297: Control Valve

    CONTROL VALVE PC12R-8 31.9w2.5 Nm 11.3w1.5 Nm (3.25w0.25 kgm) (1.15w0.15 kgm) 11.3w1.5 Nm 11.3w1.5 Nm (1.15w0.15 kgm) (1.15w0.15 kgm) RKP00121 40-13 PC12R-8 PC15R-8...
  • Page 298 44.1w4.9 Nm (4.5w0.5 kgm) 44.1w4.9 Nm (4.5w0.5 kgm) Sezione A - A Section A - A RKP00131 40-14 PC12R-8 PC15R-8...
  • Page 299 8.3w1.5 Nm (0.85w0.15 kgm) 8.3w1.5 Nm (0.85w0.15 kgm) Sezione B - B Section B - B RKP00141 Unit: mm Check item Criteria Remedy Standard size Repair limit When Free length Installed Installed Free Installed Spool return spring damage or x é.D. length load length...
  • Page 300 1.5w0.2 Nm (0.15w0.02 kgm) 53w5.9 Nm (5.4w0.6 kgm) 139.7w22.1 Nm (14.25w2.25 kgm) 139.7w22.1 Nm (14.25w2.25 kgm) Section C - C Sezione C - C RKP00151 Unit: mm Check item Criteria Remedy Standard size Repair limit Free length Installed Installed Free Installed Spool return spring (hammer) x é.D.
  • Page 301 22.1w2.5 Nm 147.1w9.8 Nm 53.9w4.9 Nm (2.25w0.25 kgm) (15w1 kgm) (5.5w0.5 kgm) Sezione E - E Sezione F -F Section E - E Section F - F 22.1w2.5 Nm (2.25w0.25 kgm) Sezione J - J Section J - J RKP00470 Unit: mm Check item Criteria...
  • Page 302 39.2w4.9 Nm 22.1w2.5 Nm (4w0.5 kgm) (2.25w0.25 kgm) Section O - O Section N - N Sezione N - N Sezione O - O RKP00251 Unit: mm Check item Criteria Remedy Standard size Repair limit When damage or Free length Installed Installed Free...
  • Page 303 PC15R-8 11.3w1.5 Nm 31.9w2.5 Nm (1.15w0.15 kgm) (3.25w0.25 kgm) 11.3w1.5 Nm 11.3w1.5 Nm (1.15w0.15 kgm) (1.15w0.15 kgm) RKP00191 40-19 PC12R-8 PC15R-8...
  • Page 304 44.1w4.9 Nm (4.5w0.5 kgm) 44.1w4.9 Nm (4.5w0.5 kgm) Section A - A Sezione A - A RKP00201 40-20 PC12R-8 PC15R-8...
  • Page 305 8.3w1.5 Nm (0.85w0.15 kgm) 8.3w1.5 Nm (0.85w0.15 kgm) Sezione B - B Section B - B RKP00211 Unit: mm Check item Criteria Remedy Standard size Repair limit Free length Installed Installed Free Installed When Spool return spring x é.D. length load length load...
  • Page 306 1.5w0.2 Nm (0.15w0.02 kgm) 53.9w5.9 Nm (5.4w0.6 kgm) 139.7w22.1 Nm (14.25w2.25 kgm) 139.7w22.1 Nm (14.25w2.25 kgm) Section C - C Sezione C - C RKP00221 Unit: mm Check item Criteria Remedy Standard size Repair limit Free length Installed Installed Free Installed Spool return spring (hammer) x é.D.
  • Page 307 147.1w9.8 Nm 53.9w4.9 Nm 22.1w2.5 Nm (15w1 kgm) (5.5w0.5 kgm) (2.25w0.25 kgm) Sezione E - E Section F - F Sezione F - F Section E - E 22.1w2.5 Nm (2.25w0.25 kgm) Section J - J Sezione J - J RKP00490 Unit: mm Check item...
  • Page 308 39.2w4.9 Nm 22.1w2.5 Nm (4w0.5 kgm) (2.25w0.25 kgm) Sezione N - N Sezione O - O Section N - N Section O - O RKP00480 Unit: mm Check item Criteria Remedy Standard size Repair limit When damage or Free length Installed Installed Free...

  • Page 309: Swivel Joint (Variable Gauge Undercarriage)

    SWIVEL JOINT RKP00500 Unit: mm Check item Criteria Remedy Standard size Standard clearance Clearance limit Clearance between Replace rotor and shaft 0.055 ± 0.085 0.090 40-25 PC12R-8 PC15R-8...
  • Page 310 SWIVEL JOINT For variable gauge undercarriage RKP11331 Unit: mm Check item Criteria Remedy Standard size Standard clearance Clearance limit Clearance between Replace rotor and shaft ± ± 40-26 PC12R-8 PC15R-8...

  • Page 311: Swing Motor

    SWING MOTOR 120 Nm (12.2 kgm) 98 Nm 3.9 Nm (10 kgm) (0.39 kgm) 3.9 Nm (0.39 kgm) RKP00900 Section A - A Sezione A - A Unit: mm Check item Criteria Remedy Standard size Repair limit When damage or Free length Installed Installed...

  • Page 312: Travel Motor

    TRAVEL MOTOR PC12R-8 157w8 Nm 2.5w0.5 Nm 27w2.5 Nm 37w1.9 Nm Sezione A - A Section A - A RKP00891 40-28 PC12R-8 PC15R-8...
  • Page 313 Unit: mm Check item Criteria Remedy Standard clearance Clearance limit Clearance between piston and cylinder 0.009±0.014 0.04 Replace Clearance between shoe 0.03±0.15 and piston Standard size Repair limit When damage or Free Installed Installed Free Installed deformation Cylinder block spring length length load...

  • Page 314: Pc12R-8 Mistral

    PC12R-8 MISTRAL PC12R-8 MISTRAL HS PC15R-8 PC15R-8 HS 15.2w0.8 Nm 2.5w0.5 Nm 37w1.9 Nm 27w2.5 Nm 157w8 Nm 2.5w0.5 Nm 10w1 Nm 2.5w0.5 Nm Section A - A Sezione A - A 40-30 PC12R-8 PC15R-8...
  • Page 315 ......37 Nm 37w2.5 Nm Sezione B - B Section B - B Section C - C Sezione C - C RKP00883 Unit: mm Check item Criteria Remedy Standard clearance Clearance limit Clearance between 0.009±0.014 0.04 piston and cylinder Replace 0.009±0.014 0.04...
  • Page 316 HAMMER RKP01710 Unit: mm Check item Criteria Remedy Standard size Repair limit Free length Installed Installed Free Installed Centering spring x é.D. length load length load Replace 124.5 N 100.0 N 33.9x15.3 28.4 Ð (12.7 kg) (10.2 kg) 16.7 N 13.7 N Metering spring 22.7x8.1...
  • Page 317 PAGE INTENTIONALLY LEFT BLANK 40-33 PC12R-8 PC15R-8...

  • Page 318: Cylinders

    CYLINDERS PC12R-8 Boom: 245w24.5 Nm (Wrench size: 30 mm) Boom: 412w41.2 Nm Arm: 324w32.4 Nm (Wrench size: 32 mm) Arm: 392w39.2 Nm Bucket: 324w32.4 Nm (Wrench size: 32 mm) Bucket: 392w39.2 Nm Boom swing: 343w34.3 Nm (Wrench size: 32 mm) Boom swing: 441w44.1 Nm Blade:...
  • Page 319 CYLINDERS PC15R-8 Loctite 262 Boom: 441w44.1 Nm Boom: 324w32.4 Nm (Wrench size: 32 mm) Arm: 412w41.2 Nm Arm: 412w41.2 Nm (Wrench size: 32 mm) Bucket: 392w39.2 Nm Bucket: 324w32.4 Nm (Wrench size: 32 mm) Boom swing: 441w44.1 Nm Boom swing: 324w32.4 Nm (Wrench size: 32 mm) Blade: 539w53.9 Nm...

  • Page 320: Work Equipment

    WORK EQUIPMENT PC12R-8 RKP01560 Sezione C - C Section C - C Sezione A - A Sezione B - B Section A - A Section B - B Sezione D - D Sezione F - F Section D - D Sezione E - E Section E - E Section F - F...
  • Page 321 Sezione H - H Sezione I - I Sezione J - J Section J - J Section H - H Section I - I Section G - G Sezione G - G Sezione K - K Section K - K Section L - L Section M - M Sezione L - L...
  • Page 322 WORK EQUIPMENT PC15R-8 RKP01560 Sezione C - C Section C - C Sezione A - A Sezione B - B Section A - A Section B - B Sezione D - D Sezione F - F Section D - D Sezione E - E Section E - E Section F - F...
  • Page 323 Sezione H - H Sezione I - I Section J - J Sezione J - J Section I - I Section H - H Sezione G - G Section G - G Sezione K - K Sezione L - L Sezione M - M Section M - M Section K - K...

This manual is also suitable for:

Pc15r-8 seriesPc12r-8 mistralPc12r-8 mistral hsPc15r-8Pc15r-8 hs

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