Komatsu PC130-7 Shop Manual
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Komatsu PC130-7 Shop Manual

2004
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MACHINE MODEL
PC130-7
• 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.
• PC130-7 mounts the SAA4D95LE-3 engine.
For details of the engine, see the 95-3 Series Engine Shop Manual.
© 2004
All Rights Reserved
Printed in Japan 04-04(02)
SERIAL NUMBER
70001 and up
SEBM036301
00-1
(1)

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Summary of Contents for Komatsu PC130-7

  • Page 1 70001 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 AND FUNCTION ..............10-1 TESTING AND ADJUSTING ...............20-1 DISASSEMBLY AND ASSEMBLY ......To be issued next time MAINTENANCE STANDARD ..............40-1 OTHERS ........................90-1 00-2 PC130-7...
  • Page 3 10-39 10-81 10-122 20-8 01-9 10-40 10-82 10-124 20-9 10-41 10-83 10-125 20-10 10-1 10-42 10-84 10-126 20-11 10-2 10-43 10-85 10-127 20-101 10-3 10-44 10-86 10-128 20-102 10-4 10-45 10-87 10-129 20-103 10-5 10-46 10-88 10-130 20-104 00-2-1 PC130-7...
  • Page 4 20-324 20-413 20-465 20-149 20-231 20-325 20-414 20-466 20-150 20-232 20-326 20-415 20-467 20-151 20-233 20-327 20-416 20-468 20-152 20-234 20-328 20-417 20-469 20-153 20-235 20-329 20-418 20-470 20-154 20-236 20-330 20-419 20-471 20-155 20-237 20-331 20-420 20-472 00-2-2 PC130-7...
  • Page 5 40-30 20-605 40-31 20-606 40-32 20-607 40-34 20-608 40-35 20-609 40-36 20-610 40-37 20-611 40-38 20-612 40-39 20-613 40-40 20-614 40-41 20-615 20-616 90-1 20-617 90-3 20-618 90-5 20-619 90-7 20-620 90-9 20-621 90-11 20-622 90-13 20-623 90-15 00-2-3 PC130-7...
  • Page 7 When checking the water 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 cause burns. Be careful not to get caught in the fan, fan belt or other rotating parts. 20-1 PC130-7...
  • Page 8 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR ENGINE STANDARD VALUE TABLE FOR ENGINE Model name PC130-7 Engine SAA4D95LE-3 Item Measurement condition Unit Standard value Permissible value High idling 2,350 ± 100 2,350 ± 100 Engine speed Low idling 1,100 ± 50 1,100 ±...
  • Page 9 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR CHASSIS STANDARD VALUE TABLE FOR CHASSIS Model name PC130-7 Cate- Item Measurement condition Unit Standard value Permissible value gory • Engine coolant temperature: Within operating range • Hydraulic oil temperature: 45 – 55 °C Pump relief 2,120 ±...
  • Page 10 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR CHASSIS Model name PC130-7 Cate- Item Measurement condition Unit Standard value Permissible value gory • Hydraulic oil temperature: 45 – 55 °C • Engine speed: High idling 2.9 ± 0.5 2.9 ± 0.5 Unload pressure •...
  • Page 11 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR CHASSIS Model name PC130-7 Cate- Item Measurement condition Unit Standard value Permissible value gory 75 ± 10 Max. 90 Overrun of swing (mm) {730 ± 100} (Max. 870) • Hydraulic oil temperature: 45 – 55 °C •...
  • Page 12 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR CHASSIS Model name PC130-7 Cate- Item Measurement condition Unit Standard value Permissible value gory • Hydraulic oil temperature: 45 – 55 °C • Engine speed: High idling Leakage from swing l/min • Swing lock switch: LOCK Max.
  • Page 13 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR CHASSIS Model name PC130-7 Cate- Item Measurement condition Unit Standard value Permissible value gory Hydraulic drift of travel • Hydraulic oil temperature: 45 – 55 °C • Engine: Stopped • Stop machine on slope of 12 degrees with sprocket on upper side.
  • Page 14 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR CHASSIS Model name PC130-7 Cate- Item Measurement condition Unit Standard value Permissible value gory CURL 3.2 ± 0.4 Max. 4.4 Arm speed • Hydraulic oil temperature: 45 – 55 °C • Engine speed: High idling •...
  • Page 15 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR CHASSIS Model name PC130-7 Cate- Item Measurement condition Unit Standard value Permissible value gory Arm time lag Max. 2.0 Max. 3.0 • Hydraulic oil temperature: 45 – 55 °C • Engine speed: Low idling •...
  • Page 16 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR CHASSIS Model name PC130-7 Cate- Item Measurement condition Unit Standard value Permissible value gory • Hydraulic oil temperature: 45 – 55 °C • Engine: High idling • Working mode: A Time taken to swing •...
  • Page 17 TESTING AND ADJUSTING STANDARD VALUE TABLE FOR CHASSIS Model name PC130-7 Cate- Item Measurement condition Unit Standard value Permissible value gory Hydraulic pump performance • PC-EPC current: 400 mA • Pump speed: 2,000 rpm Test pump discharge Lower limit of...

  • Page 19: Table Of Contents

    RELEASING RESIDUAL PRESSURE IN HYDRAULIC CIRCUIT ............. 20-142 BLEEDING AIR FROM EACH PART ......................20-143 TESTING PROCEDURE FOR DIODE ...................... 20-146 SPECIAL FUNCTIONS OF MONITOR PANEL ..................20-147 PREPARATION WORK FOR TROUBLESHOOTING FOR ELECTRIC SYSTEM ........20-166 PM-CLINIC SERVICE ..........................20-167 20-101 PC130-7...

  • Page 20: Tools For Testing, Adjusting, And Troubleshooting

    799-101-5230 Nipple Size: 14 x 1.5mm 07002-11423 O-ring 799-101-5002 Hydraulic tester 790-261-1203 Digital hydraulic Testing and adjusting oil tester pressure in pump PC con- * Same as H (Only quantity is different) trol circuit 799-101-5230 Nipple 07002-11423 O-ring 20-102 PC130-7...
  • Page 21 For the model names and part Nos. of the T-adapters and boxes used for troubleshooting for the monitor panel, controllers, sensors, actuators, and wiring harnesses, see TROUBLESHOOTING, Layout of connec- tors and electric circuit diagram of each system. 20-103 PC130-7...

  • Page 22: Testing And Adjusting Engine Speed

    3. Measuring pump relief speed 1) Set the fuel control dial in the high idling (MAX) position. 2) Relieve the arm circuit by moving the arm IN and measure the engine speed. 20-104 PC130-7...

  • Page 23: Measuring Exhaust Gas Color

    5) Turn on the power switch of smoke meter 5) Remove the filter paper and compare it with the attached scale. 6) After finishing measurement, remove the measuring instrument return removed parts. 6) Start the engine and heighten the engine coolant temperature to the operating range. 20-105 PC130-7...
  • Page 24 8) Place the contaminated filter paper on the clean filter paper (at least 10 sheets) in the filter paper holder and read the indicated value. 9) After finishing measurement, remove the measuring instrument return removed parts. 20-106 PC130-7...

  • Page 25: Adjusting Valve Clearance

    5. Rotate the crankshaft forward to bring the stamped "1.4TOP" line (a) of the crank pulley to pointer (2) and set the No. 4 cylinder to the com- pression top dead center. 20-107 PC130-7...
  • Page 26 Q in the valve arrangement draw- ing. a Adjust the valve clearance according to step 4 above. 7. After finishing adjustment, return the removed 3 Cylinder head cover mounting bolt: parts. 7.84 – 9.8 Nm {0.8 – 1.0 kgm} 20-108 PC130-7...

  • Page 27: Measuring Compression Pressure

    Secure the adapter with the clamping holder 3 Mounting bolt: 39.2 – 49 Nm {4 – 5 kgm} bolt. 3 Mounting bolt: 39.2 – 49 Nm {4 – 5 kgm} and mounting bolt for the nozzle holder. 20-109 PC130-7...

  • Page 28: Measuring Blow-By Pressure

    Put pin [3] between the sprocket and track frame to lock the travel mechanism securely. 4. Start the engine and warm it up to the operating range. • Engine coolant temperature: Within operat- ing range • Hydraulic oil temperature: 45 – 55°C 20-110 PC130-7...

  • Page 29: Measuring Engine Oil Pressure

    2. Install adapter E3 and connect the disconnected hose again. 3. Install nipple E4 and connect it to hydraulic tester 4. Start the engine and heighten the engine coolant temperature to the operating range. 20-111 PC130-7...

  • Page 30: Testing And Adjusting For Fuel Injection Timing

    If the rocker arm Removal, installation of fuel pump assembly. cannot be moved, the No. 1 cylinder is not at the compression top dead center. In this case, rotate the crankshaft one more turn. 20-112 PC130-7...
  • Page 31 No. 1 cylinder can be moved by the valve clearance with the hand. If the rocker arm cannot be moved, the No. 1 cylinder is not at the compression top dead center. In this case, rotate the crankshaft one more turn. 20-113 PC130-7...
  • Page 32 11. Disconnect all of connected fuel injection tubes against the piston. (12), if there are any. a Since the piston stroke will be measured at the valve stem top, check that the valve bot- tom is in contact with the piston top securely. 20-114 PC130-7...
  • Page 33 (14), and then tighten the mounting nuts tempo- rarily. a The position where fuel stops flowing out of the No. 1 delivery valve holder is the position to start fuel injection in the No. 1 cylinder (fuel injection timing). 20-115 PC130-7...

  • Page 34: Adjusting Engine Speed Sensor

    Returning angle of sensor: 1 ± 1/6 turn a After this adjustment, clearance (a) between the sensor tip and gear tooth tip is 1.25 – 1.75 mm. 3. Fixing sensor (1), tighten nut (3). 2 Nut: 49 – 68.6 Nm {5 – 7 kgm} 20-116 PC130-7...

  • Page 35: Testing And Adjusting Fan Belt Tension

    If a belt is lengthened to the adjustment limit, cut, or cracked, replace it with new one. 4. After finishing adjustment, return the covers. a If a V-belt is replaced, adjust its tension again after 1 operating hour. 20-117 PC130-7...

  • Page 36: Testing And Adjusting Air Conditioner Compressor Belt Tension

    If a belt is lengthened to the adjustment limit, cut, or cracked, replace it with new one. 4. After finishing adjustment, return the covers. a If a V-belt is replaced, adjust its tension again after 1 operating hour. 20-118 PC130-7...

  • Page 37: Measuring Clearance Of Swing Circle Bearing

    At this time, the front end of the upper struc- steps 3 – 5. ture lowers and the rear end rises. 7. After finishing measurement, remove the mea- 3. Set the dial gauge G to the 0 point. suring instruments and return the removed parts. 20-119 PC130-7...

  • Page 38: Testing And Adjusting Track Shoe Tension

    1) Add grease through valve (2). a If the track shoe is not tensed well, drive the machine forward and in reverse slowly. 2) After finishing adjustment, check again that the track shoe tension is normal according to the above described procedure. 20-120 PC130-7...
  • Page 39 You may supply grease until distance (b) between the idler guide and track frame end is 0 mm. If the tension is still low, the pin and bushing are worn excessively. In this case, turn over or replace the pin and bushing. 20-121 PC130-7...

  • Page 40: Testing And Adjusting Oil Pressure In Work Equipment, Swing, And Travel Circuits

    (1) from the top of the control valve. 1) Start the engine. 2) Run the engine at high idling and set all the control levers in neutral and measure the oil pressure. a The pressure measured when the unload valve is unloaded is indicated. 20-122 PC130-7...
  • Page 41 2) Run the engine at high idling and relieve the travel circuit and measure the oil pressure. a The pressure measured when the main relief valve is relieved is indicated. The travel cir- cuit is always relieved at high pressure. 5) Connect pilot hose (3). 20-123 PC130-7...
  • Page 42 5) Connect pilot hose (3). 6) After finishing adjustment, check again that the pressure is normal according to the 4) After finishing adjustment, check again that above described measurement procedure. the pressure is normal according to the above described measurement procedure. 20-124 PC130-7...

  • Page 43: Measuring Control Circuit Basic Pressure

    2. Install nipple J2 and connect it to oil pressure gauge [1] of hydraulic tester J1. a Use the oil pressure gauges of 5.9 MPa {60 kg/cm 3. Run the engine and heighten the hydraulic oil temperature to 45 – 55°C. 20-125 PC130-7...

  • Page 44: Testing And Adjusting Oil Pressure In Pump Pc Control Circuit

    2. Remove oil pressure pickup plugs (1) and (2). • The drawing shows the PC valve output • (1): Pump discharge pressure pickup plug (at pressure side. top of control valve) 4. Run the engine and heighten the hydraulic oil temperature to 45 – 55°C. 20-126 PC130-7...
  • Page 45 6. After finishing measurement, remove the mea- a Change of servo piston stroke per turn of suring instruments and return the removed parts. sleeve: 1.5 mm 4. Fixing sleeve (5), tighten locknut (6). 3 Locknut: 88 – 113 Nm {9 – 11.5 kgm} 20-127 PC130-7...
  • Page 46 TESTING AND ADJUSTING OIL PRESSURE TESTING AND ADJUSTING IN PUMP PC CONTROL CIRCUIT 5. Tighten hose fixing nut (4). 6. After finishing adjustment, check that the pres- sure is normal according to the above described procedure. 20-128 PC130-7...

  • Page 47: Testing And Adjusting Oil Pressure In Pump Ls Control Circuit

    1) Remove the top cover of the control valve and open the pump room cover. 2) Remove oil pressure pickup plugs (1) and • The drawing shows the LS valve output (2). pressure side. • (1): Pump discharge pressure pickup plug (at top of control valve) 20-129 PC130-7...
  • Page 48 Pump LS valve discharge output Ratio of oil pres- Travel lever pressure pressure sure MPa {kg/cm Almost same 2.9±0.5 2.9±0.5 Neutral pressure {30±5} {30±5} (1:1) Full (Idle 7.8±2.0 4.4±1.0 Almost 3/5 running) {80±20} {45±10} (1:0.6) 20-130 PC130-7...
  • Page 49 3) Run the engine and heighten the hydraulic oil temperature to 45 – 55°C, and then push up the track shoe on either side with the work equipment. 5) After finishing measurement, remove the measuring instruments return removed parts. 20-131 PC130-7...
  • Page 50 Tighten the hose sleeve nut (4) temporarily and turn the plug, while checking the LS dif- ferential pressure. 3 Locknut: 98 – 122.5 Nm {10 – 12.5 kgm} 4. Fixing plug (5), tighten locknut (6). 5. Tighten hose sleeve nut (4). 20-132 PC130-7...

  • Page 51: Measuring Solenoid Valve Output Pressure

    2. Install adapter M2 and connect the disconnected Almost same as control basic ON (Energized) pressure hose again. (See standard values table) 3. Install nipple [1] of hydraulic tester M1 and con- nect it to hydraulic gauge [2]. 20-133 PC130-7...
  • Page 52 Pump pressure: Above 30.4 MPa {310 kg/cm Overheat prevention function operates during run Hydraulic oil temperature: Above 95°C at Hi Other than above condition Operation table of PPC pressure lock solenoid valve Operating condition Operation LOCK position Safety lock lever FREE position 20-134 PC130-7...

  • Page 53: Measuring Ppc Valve Output Pressure

    Since PPC oil pressure switch (9) is installed on the under side of the floor frame, remove 3. Run the engine and heighten the hydraulic oil the cab undercover (on the front side). temperature to 45 – 55°C. 20-135 PC130-7...

  • Page 54: Adjusting Play Of Work Equipment And Swing Ppc Valves

    6. Install the work equipment and swing PPC valve Almost same as control basic Operated to assembly. pressure (See standard values stroke end table) 5. After finishing measurement, remove the mea- suring instruments and return the removed parts. 20-136 PC130-7...

  • Page 55: Testing Parts Which Cause Hydraulic Drift Of Work Equipment

    1) Stop the arm cylinder about 100 mm before this time), the oil on the head side flows in the the IN stroke end and stop the engine. drain circuit. As a result, the pressure is unbal- anced and the lowering speed is increased. 20-137 PC130-7...
  • Page 56 10 seconds to heighten the pressure in the accumulator. a If there is a difference in the lowering dis- tance between the LOCK position and FREE position, the PPC valve is defective (it has an internal defect). 20-138 PC130-7...

  • Page 57: Measuring Oil Leakage

    3) Run the engine at high idling and relieve the boom circuit by raising the boom. k Take care not to "lower the boom". 4) Measure the oil leakage for 1 minute after 30 seconds since relieving is started. 5) After finishing measurement, return the removed parts. 20-139 PC130-7...
  • Page 58 3) Run the engine at high idling and relieve the bucket circuit by curling the bucket. k Take care not to "dump the bucket". 4) Measure the oil leakage for 1 minute after 30 seconds since relieving is started. 5) After finishing measurement, return the removed parts. 20-140 PC130-7...
  • Page 59 30 seconds since r elieving is started. a Measure several times, moving the motor a little (changing the position of the valve plate and cylinder and that of the cylinder and piston) each time. 5) After finishing measurement, return the removed parts. 20-141 PC130-7...

  • Page 60: Releasing Residual Pressure In Hydraulic Circuit

    The pres- sure in the accumulator is used up, how- ever, after the control valve is operated 2 – 3 times. 3) Run the engine at low idling for 10 seconds to heighten the pressure in the accumulator. 20-142 PC130-7...

  • Page 61: Bleeding Air From Each Part

    (Set the starting switch in the ON position and hold the fuel control dial in the MAX position for 3 seconds, and the auto- matic warm-up operation is reset). 20-143 PC130-7...
  • Page 62 Run the track shoe forward and in reverse as evenly as possible. a Run the track shoe on the opposite side idle similarly. 4) Run the engine at low idling and swing slowly 2 turns or more in each direction. 20-144 PC130-7...
  • Page 63 2) Check the oil level by sight gauge (5) on the side of the hydraulic tank. a If the oil level is between lines H and L, it is normal. a If the oil level is below line L, add new oil. 20-145 PC130-7...

  • Page 64: Testing Procedure For Diode

    The indicated value does not change: There is not continuity (Defective). • The indicated value changes: There is continuity (Normal) (Note). Note) In the case of a silicon diode, the cir- cuit tester indicates a value of 460 – 600. 20-146 PC130-7...

  • Page 65: Special Functions Of Monitor Panel

    3. Caution buzzer stop switch operation) 2. Service meter section 4. Auto-decelerator switch 7. Working mode selector switch (UP) 5. Setting switch (Black switch) 8. Working mode selector switch 6. Travel speed shifting switch (DOWN) 9. Swing lock switch 20-147 PC130-7...
  • Page 66 Function of selecting default working mode [05] Function of adjusting service meter Special function of monitoring replacement of engine oil a Each number in [ ] is a code No. displayed in the service meter section when the menu is selected. 20-148 PC130-7...
  • Page 67 Even if a user code is not displayed, a trouble may have occurred. If you feel any abnormality, be sure to check for an error code with the "Function of dis- playing error code [01]" in the service menu. 20-149 PC130-7...
  • Page 68 Error in swing brake system with the swing lock switch, if necessary. The brake may not be released, depending on the cause of the failure. In any case, have the machine inspected immediately. Error in governor system Have the machine inspected immediately. 20-150 PC130-7...
  • Page 69 To use the special functions in the service menu, you must operate the switches differently from the above. See details of each menu. 8. Function of adjusting service meter 9. Special function of monitoring replace- ment of engine oil 20-151 PC130-7...
  • Page 70 For the error codes which the monitor codes are recorded, the oldest error panel and governor and pump controller code is deleted and the error code of the can detect, see the "Error codes table". new trouble is recorded. 20-152 PC130-7...
  • Page 71 (3). ii) Under the above condition, turn the start- ing switch ON again and hold caution buzzer stop switch (3) for 5 seconds. a An error code having the mark [E] cannot be deleted. 20-153 PC130-7...
  • Page 72 Abnormality in governor potentiometer Abnormality in fuel control dial — Short circuit in battery relay output line — Step-out of governor motor Disconnection in phases A and B of governor motor Short circuit in phases A and B of governor motor 20-154 PC130-7...
  • Page 73 UP switch (7): Code No. increases. • DOWN switch (8): Code No. decreases. a This function displays monitoring code [001] and its information first. a For the items and code Nos. which you can monitor, see the "Monitoring codes table". 20-155 PC130-7...
  • Page 74 For the No. of each bit, see the "Monitor- i n g c o d e s t a b l e " a n d t h e d r a w i n g attached to it. 20-156 PC130-7...
  • Page 75 Swing holding brake release switch (RELEASE) (6bit) Swing lock switch (LOCK) (6bit) (Unused) (6bit) (Unused) (6bit) (Unused) (6bit) Swing holding brake solenoid (ON) (6bit) Drive condition of sole- noid valve (Unused) (6bit) 2nd relief solenoid (ON) (6bit) Travel speed shifting solenoid (ON) (6bit) 20-157 PC130-7...
  • Page 76 10mV Alternator input voltage 10mV (Unused) — Starting switch signal ACC (ON) (6bit) Starting switch signal C (START) (6bit) Starting switch signal R1 (HEAT) (6bit) Input condition 4 of switch Lamp switch (ON) (6bit) (Unused) (6bit) (Unused) (6bit) 20-158 PC130-7...
  • Page 77 Windows limit switch (ON) (6bit) Input condition 5 of switch Wiper contact W (ON) (6bit) Wiper contact P (ON) (6bit) (Unused) (6bit) Monitor panel program version Numeral Governor and pump controller program version Numeral Display of numeral code Display of 6bit 20-159 PC130-7...
  • Page 78 (4) on the fuel injec- tion pump side and turn the whole governor spring to adjust (Take care not to change the adjustment dimen- 3 Locknut: sion of the governor spring). 11.8 – 19.6 Nm {1.2 – 2.0 kgm} 20-160 PC130-7...
  • Page 79 Return the fuel control dial to the MIN position, and then turn it again slowly toward the MAX position. At this time, check that governor spring is com- pressed by about 3.1 mm after governor lever (3) reaches the full stopper. 20-161 PC130-7...
  • Page 80 Nothing is displayed in display section (1). a Each time the set switch is pressed, the display mode or maintenance period changes in the following order. Display Display mode/Maintenance period Reset maintenance function 125-hour interval 250-hour interval 500-hour interval Demonstration mode 20-162 PC130-7...
  • Page 81 DOWN switch (8): Previous mode is dis- played. a Nothing is displayed in display section (1). a The working mode changes in the follow- ing order. A o E o B a Mode L cannot be set as the default. 20-163 PC130-7...
  • Page 82 If the service meter reading is decreased, the (1). a When this function is selected, the figure new value is not accepted, but the caution at the right end is selected automatically buzzer sounds 3 times. and it flashes. 20-164 PC130-7...
  • Page 83 To clear the elapsed time after replacing the engine oil, hold set switch (5) for 3 seconds while the elapsed time is displayed. a If the above operation is performed, the elapsed time in the monitor panel is set to 0 hour. 20-165 PC130-7...

  • Page 84: Preparation Work For Troubleshooting For Electric System

    Take care not to drop the mounting screws into the console. 3) Insert or connect testing T-adapters in or to connectors P01 and P02 of the monitor panel. a Connector P70 clamped near the above connectors is not used. 20-166 PC130-7...

  • Page 85: Pm-Clinic Service

    Pm-Clinic Service Model Serial No. Service meter PC130-7 User's name Date of inspection Inspector Specifications Main parts Attachments Shoe width Boom Standard 1 att. 500 mm Standard Blade 600 mm Bucket Standard 2-piece boom 700 mm Check of oil and coolant levels...
  • Page 86 TESTING AND ADJUSTING PM-CLINIC SERVICE Items related to engine 20-168 PC130-7...
  • Page 87 TESTING AND ADJUSTING PM-CLINIC SERVICE Items related to hydraulic equipment 20-169 PC130-7...
  • Page 88 20-170 PC130-7...
  • Page 89 20-171 PC130-7...
  • Page 91 INSPECTION BEFORE TROUBLESHOOTING ..................20-212 CLASSIFICATION OF AND PROCEDURES FOR TROUBLESHOOTING ..........20-213 CONNECTOR ARRANGEMENT DRAWING AND ELECTRIC CIRCUIT DIAGRAM OF EACH SYSTEM ..20-217 CONNECTION TABLE FOR CONNECTOR PIN NUMBERS ..............20-234 T-BRANCH BOX AND T-BRANCH TABLE ....................20-257 20-201 PC130-7...

  • Page 92: Points To Remember When Troubleshooting

    Then, remove the root 1) Check the oil level cause. 2) Check for any external leakage of oil from the piping or hydraulic equipment. 3) Check the travel of the control levers. 4) Check the stroke of the control valve spool. 20-202 PC130-7...

  • Page 93: Sequence Of Events In Troubleshooting

    TROUBLESHOOTING SEQUENCE OF EVENTS IN TROUBLESHOOTING SEQUENCE OF EVENTS IN TROUBLESHOOTING 20-203 PC130-7...

  • Page 94: Points To Remember When Carrying Out Maintenance

    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 PC130-7...
  • Page 95 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 cleaning with compressed air. 20-205 PC130-7...
  • Page 96 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 PC130-7...
  • Page 97 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 PC130-7...
  • Page 98 After drying, leave the wiring harness dis- connected and carry out a continuity test to check for any short circuits between pins caused by water. a After completely drying the connector, blow it with contact restorer and reas- semble. 20-208 PC130-7...
  • Page 99 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. a If there is any change, there is probably defective contact in that circuit. 20-209 PC130-7...
  • Page 100 If an oil clean- ing 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 PC130-7...
  • Page 101 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 PC130-7...

  • Page 102: Inspection Before Troubleshooting

    7. Check of alternator voltage (with engine at medium or higher speed) Must be 27.5 - Replace 29.5 V after operation of several min- utes. 8. Check of operating sound of battery relay (when starting switch is — Replace turned OFF and ON) 20-212 PC130-7...

  • Page 103: Classification Of And Procedures For Troubleshooting

    In this case, check the phenomenon looking like a trouble again and select the same phenomenon from the table of "Phenomena looking like troubles and troubleshooting Nos.", and then carry out troubleshooting related to that phenomenon in the "E mode", "H mode", or "S mode". 20-213 PC130-7...
  • Page 104 Speed or power of whole work equipment, travel, and swing is low Engine speed lowers extremely or engine stalls Work equipment, travel, and swing systems do not work Abnormal sound comes out from around hydraulic pump Fine control performance or response is low 20-214 PC130-7...
  • Page 105 While engine is running, caution items flash E-14 While engine is running, emergency stop items flash E-15 Engine coolant thermometer does not display normally E-16 Fuel level gauge does not display normally E-17 Swing lock monitor does not display normally E-18 20-215 PC130-7...
  • Page 106 E-28 Monitoring function does not display "Swing" normally E-29 Monitoring function does not display "Travel" normally E-30 Monitoring function does not display "Service" normally E-31 Other phenomena Air conditioner does not operate (Troubleshooting for air conditioner E-32 system) 20-216 PC130-7...

  • Page 107: Connector Arrangement Drawing And Electric Circuit Diagram Of Each System

    Windshield washer motor (Tank) Pump oil pressure sensor Fuel level sensor Hydraulic oil temperature sensor Overload alarm pressure sensor (If equipped) A-70 A71K Fuel priming pump (If equipped) — Spare connector Spare connector Spare connector Spare connector Spare connector Intermediate connector 20-217 PC130-7...
  • Page 108 CAN terminal resistance CAN terminal resistance Light switch Working lamp (Boom front) — Speaker (Right) AC-8 — Cigarette lighter Radio (If equipped) Right lever knob switch Left lever knob switch Intermediate connector — Air conditioner unit Air conditioner control panel 20-218 PC130-7...
  • Page 109 Bucket DUMP oil pressure switch Boom RAISE oil pressure switch Swing RIGHT oil pressure switch Arm OUT oil pressure switch Intermediate connector Service 1 (Front) oil pressure switch (If equipped) Service 1 (Rear) oil pressure switch (If equipped) 20-219 PC130-7...
  • Page 110 Intermediate connector Intermediate connector PPC lock solenoid valve Travel speed shifting solenoid valve Swing holding brake solenoid valve 2-stage relief solenoid PC-EPC solenoid valve LS-EPC solenoid valve Spare connector Window rear limit switch AB-9 Wiper motor Swing lock switch 20-220 PC130-7...
  • Page 112 CONNECTOR ARRANGEMENT DRAWING AND ELECTRIC CIRCUIT DIAGRAM OF EACH SYSTEM TROUBLESHOOTING STEREOGRAM OF CONNECTORS 20-222 PC130-7...
  • Page 113 CONNECTOR ARRANGEMENT DRAWING AND ELECTRIC CIRCUIT DIAGRAM OF EACH SYSTEM TROUBLESHOOTING 20-223 PC130-7...
  • Page 114 CONNECTOR ARRANGEMENT DRAWING AND ELECTRIC CIRCUIT DIAGRAM OF EACH SYSTEM TROUBLESHOOTING 20-224 PC130-7...
  • Page 115 CONNECTOR ARRANGEMENT DRAWING AND ELECTRIC CIRCUIT DIAGRAM OF EACH SYSTEM TROUBLESHOOTING 20-225 PC130-7...
  • Page 116 CONNECTOR ARRANGEMENT DRAWING AND ELECTRIC CIRCUIT DIAGRAM OF EACH SYSTEM TROUBLESHOOTING 20-226 PC130-7...
  • Page 118 CONNECTOR ARRANGEMENT DRAWING AND ELECTRIC CIRCUIT DIAGRAM OF EACH SYSTEM TROUBLESHOOTING CIRCUIT DIAGRAM OF MONITOR PANEL SYSTEM (M-CIRCUIT) 20-228 PC130-7...
  • Page 119 CONNECTOR ARRANGEMENT DRAWING AND ELECTRIC CIRCUIT DIAGRAM OF EACH SYSTEM TROUBLESHOOTING a This circuit diagram is made by excerpting the monitor panel system, engine preheating/starting/charging system, lower wiper system, and light system from the general electric circuit diagram. 20-229 PC130-7...
  • Page 120 CONNECTOR ARRANGEMENT DRAWING AND ELECTRIC CIRCUIT DIAGRAM OF EACH SYSTEM TROUBLESHOOTING CIRCUIT DIAGRAM OF ENGINE THROTTLE CONTROL SYSTEM OF GOVERNOR AND PUMP CONTROLLER (G-CIRCUIT) 20-230 PC130-7...
  • Page 121 CONNECTOR ARRANGEMENT DRAWING AND ELECTRIC CIRCUIT DIAGRAM OF EACH SYSTEM TROUBLESHOOTING a This circuit diagram is made by excerpting the governor and pump controller system (engine throttle/power supply/model selection/communication system) from the general electric circuit diagram. 20-231 PC130-7...
  • Page 122 CONNECTOR ARRANGEMENT DRAWING AND ELECTRIC CIRCUIT DIAGRAM OF EACH SYSTEM TROUBLESHOOTING CIRCUIT DIAGRAM OF PUMP CONTROL SYSTEM OF GOVERNOR AND PUMP CON- TROLLER (P-CIRCUIT) 20-232 PC130-7...
  • Page 123 CONNECTOR ARRANGEMENT DRAWING AND ELECTRIC CIRCUIT DIAGRAM OF EACH SYSTEM TROUBLESHOOTING a This circuit diagram is made by excerpting the governor and pump controller system (pump control), PPC lock system, and travel alarm system from the general electric circuit diagram. 20-233 PC130-7...

  • Page 124: Connection Table For Connector Pin Numbers

    Q’ty: 20 • Q’ty : 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 • Q’ty: 20 • Q’ty: 20 20-234 PC130-7...
  • Page 125 T-adapter pins Male (female housing) Female (male housing) Part No. 799-601-7050 Part No.: 08055-10681 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 20-235 PC130-7...
  • Page 126 Grommet: Black • Q’ty: 20 • Q’ty: 20 Terminal part No.: Terminal part No.: • Electric wire size: 1.25 • Electric wire size: 1.25 — — • Grommet: Red • Grommet: Red • Q’ty: 20 • Q’ty: 20 20-236 PC130-7...
  • Page 127 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 20-237 PC130-7...
  • Page 128 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 20-238 PC130-7...
  • Page 129 CONNECTION TABLE FOR CONNECTOR PIN NUMBERS S type connector No.of T-adapter pins Male (female housing) Female (male housing) 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 20-239 PC130-7...
  • Page 130 Body part No.: 79A-222-2620 (Q’ty: 5) Body part No.: 79A-222-2610 (Q’ty: 5) 799-601-2950 Body part No.: 79A-222-2660 (Q’ty: 5) Body part No.: 79A-222-2650 (Q’ty: 5) 799-601-2720 Body part No.: 79A-222-2710 (Q’ty: 2) Body part No.: 79A-222-2690 (Q’ty: 2) 20-240 PC130-7...
  • Page 131 Body part No.: 79A-222-2730 (Q’ty: 2) Body part No.: 79A-222-2720 (Q’ty: 2) 799-601-2740 Body part No.: 79A-222-2750 (Q’ty: 2) Body part No.: 79A-222-2740 (Q’ty: 2) Terminal part No.: 79A-222-2770 Terminal part No.: 79A-222-2760 — (Q’ty: 50) (Q’ty: 50) 20-241 PC130-7...
  • Page 132 Housing part No.: 79A-222-3430 (Q’ty: 5) 799-601-7190 — Housing part No.: 79A-222-3440 (Q’ty: 5) 799-601-7210 — Housing part No.: 79A-222-3450 (Q’ty: 5) 799-601-7220 — Housing part No.: 79A-222-3460 (Q’ty: 5) a Terminal part No.: 79A-222-3470 (No relation with number of pins) 20-242 PC130-7...
  • Page 133 AMP070 type connector No.of T-adapter Part pins Male (female housing) Female (male housing) 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 20-243 PC130-7...
  • Page 134 Female (male housing) — — — Connector for PA No.of T-adapter Part pins Male (female housing) Female (male housing) — — — Bendix MS connector No.of T-adapter Part pins Male (female housing) Female (male housing) 799-601-3460 — — 20-244 PC130-7...
  • Page 135 08027-10220 (Black) 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) 20-245 PC130-7...
  • Page 136 Female (male housing) — Part No.: 08027-10810 (Natural color) Part No.: 08027-10860 (Natural color) 08027-10820 (Black) 08027-10870 (Black) Connector for relay (Socket type) No.of T-adapter Part pins Male (female housing) Female (male housing) 799-601-7360 — — 799-601-7370 — — 20-246 PC130-7...
  • Page 137 TROUBLESHOOTING CONNECTION TABLE FOR CONNECTOR PIN NUMBERS F type connector No.of T-adapter pins Male (female housing) Female (male housing) Part No. — — — 20-247 PC130-7...
  • Page 138 Pin (male terminal) Pin (female termial) 799-601-9220 Part No.: 08191-21201, 08191-12202, Part No.: 08191-24101, 08191-24102, 08191-21205, 08191-12206 08191-24105, 08191-24106 18-14 Pin (female terminal) Pin (male termial) 799-601-9220 Part No.: 08191-22201, 08191-22202, Part No.: 08191-23101, 08191-23102, 08191-22205, 08191-22206 08191-23105, 08191-23106 20-248 PC130-7...
  • Page 139 Pin (female terminal) Pin (male termial) 799-601-9230 Part No.:08191-32201, 08191-32202 Part No.:08191-33101, 08191-33102 Pin (male terminal) Pin (female termial) 799-601-9240 Part No.:08191-41201, 08191-42202 Part No.:08191-44101, 08191-44102 18-21 Pin (female terminal) Pin (male termial) 799-601-9240 Part No.:08191-42201, 08191-42202 Part No.:08191-43101, 08191-43102 20-249 PC130-7...
  • Page 140 Pin (male terminal) Pin (female termial) 799-601-9260 Part No.: 08191-61201, 08191-62202, Part No.: 08191-64101, 08191-64102, 08191-61205, 08191-62206 08191-64105, 08191-64106 24-16 Pin (female terminal) Pin (male termial) 799-601-9260 Part No.: 08191-62201, 08191-62202, Part No.: 08191-63101, 08191-63102, 08191-62205, 08191-62206 08191-63105, 08191-63106 20-250 PC130-7...
  • Page 141 Part No.: 08191-81201, 08191-81202 Part No.: 08191-84101, 08191-84102 08191-81203, 08191-81204 08191-84103, 08191-84104 08191-81205, 08191-80206 08191-84105, 08191-84106 24-22 Pin (female terminal) Pin (male termial) 799-601-9280 Part No.: 08191-82201, 08191-82202 Part No.: 08191-83101, 08191-83102 08191-82203, 08191-82204 08191-83103, 08191-83104 08191-82205, 08191-82206 08191-83105, 08191-83106 20-251 PC130-7...
  • Page 142 Pin (male termial) Pin (female terminal) 799-601-9290 Part No.: 08191-91203, 08191-91204, Part No.: 08191-94103, 08191-94104, 08191-91205, 08191-91206 08191-94105, 08191-94106 24-31 Pin (female terminal) Pin (male termial) 799-601-9290 Part No.: 08191-92203, 08191-92204, Part No.: 08191-93103, 08191-93104, 08191-92205, 08191-92206 08191-93105, 08191-93106 20-252 PC130-7...
  • Page 143 799-601-9040 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) 20-253 PC130-7...
  • Page 144 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) 20-254 PC130-7...
  • Page 145 DTHD Series connector No.of T-adapter Part pins Body (plug) Body (receptacle) — 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) 20-255 PC130-7...
  • Page 146 [The pin No. is also marked on the connector (electric wire insertion end)] DRC26 Series connector No.of T-adapter Part pins Body (plug) Body (receptacle) 799-601-9360 — Part No.: 7821-93-3110 799-601-9350 — Part No.: 7821-93-3120 799-601-9350 — Part No.: 7821-93-3130 20-256 PC130-7...

  • Page 147: T-Branch Box And T-Branch Table

    799-601-2820 DLI 799-601-2830 DLI 799-601-2840 Additional cable 799-601-2850 Case 799-601-7010 X 799-601-7020 X 799-601-7030 X 799-601-7040 X 799-601-7050 SWP 799-601-7060 SWP 799-601-7310 SWP 799-601-7070 SWP 799-601-7320 SWP 799-601-7080 M 799-601-7090 M 799-601-7110 M 799-601-7120 M 799-601-7130 M 799-601-7340 M 20-257 PC130-7...
  • Page 148 799-601-9280 HD30 24-23 799-601-9290 HD30 24-31 799-601-9310 Plate For HD30 799-601-9320 Measurement box For DT, HD 799-601-9330 Case 799-601-9340 Case 799-601-9350 DRC 799-601-9360 DRC 799-601-9410 For NE, G sensor 2P For fuel, boost 799-601-9420 press. 799-601-9430 PVC socket 20-258 PC130-7...
  • Page 149 Error code [316] (Step-out of governor motor) ................... 20-360 Error code [317] (Disconnection in phases A and B of governor motor) ............ 20-362 Error code [318] (Short circuit in phases A and B of governor motor) ............20-364 20-301 PC130-7...

  • Page 150: Before Carrying Out Troubleshooting When Code Is Displayed

    TROUBLESHOOTING BEFORE CARRYING OUT TROUBLESHOOTING WHEN CODE IS DISPLAYED BEFORE CARRYING OUT TROUBLESHOOTING WHEN CODE IS DISPLAYED Error codes and possible causes of them Possible causes Error code 20-302 PC130-7...
  • Page 151 TROUBLESHOOTING BEFORE CARRYING OUT TROUBLESHOOTING WHEN CODE IS DISPLAYED Possible causes 20-303 PC130-7...
  • Page 152 Panel night light signal circuit Heated seat [If equipped] Heated seat [If equipped] Travel alarm [If equipped] DC/DC converter (Power supply to 12-V devices) Monitor panel (Constant power supply) Constant power supply (Fusible link: Starting switch A35) Room lamp (Spare) 20-304 PC130-7...
  • Page 153 Lighting: The controller power is supplied (There is not an error and the power supply is normal). • Flashing: The controller power is supplied (There is an error). • Put out: The controller power is not supplied. a Green LED of governor and pump controller (GREEN) 20-305 PC130-7...
  • Page 154 Pins (2) and (3) are the power supply and pins (31), (32), and (33) are the chassis ground. – • If the voltage is 20 30 V, it is normal. a Power supply connector (C03) of governor and pump controller 20-306 PC130-7...

  • Page 155: Information In Troubleshooting Table

    Connect positive (+) lead and negative (-) lead of circuit tester as explained below for troubleshooting, unless otherwise specified. • Connect positive (+) lead to pin No. or harness entered on front side. • Connect negative (-) lead to pin No. or harness entered on rear 20-307 PC130-7...
  • Page 156 • Connector No.: Shows the "Type-Number of pin" and "Color". • Branching/Merging point: Shows that there is a branching/merging point in the electric circuit to be checked. • Arrow ( ): Roughly shows the location on the machine. 20-308 PC130-7...

  • Page 158: Error Code [104] (Clogging Of Air Cleaner)

    OFF, then start engine and carry out trou- bleshooting. Air cleaner Voltage 4 Defective monitor panel When normal Max. 1 V Between (5) and chassis ground When clogged 20 – 30 V Circuit diagram related to air cleaner clogging switch 20-310 PC130-7...

  • Page 159: Error Code [108] (Overheating Of Engine Coolant)

    Engine coolant Resistance temperature 4 Defective monitor panel Between (1) and (13) 3.5k – 90 kz 10 – 100 °C Between (1) and Min. 1 Mz chassis ground Circuit diagram related to engine coolant temperature sensor 20-311 PC130-7...

  • Page 160: Error Code [112] (Short Circuit In Wiper Motor Drive Forward System)

    OFF, then turn starting switch ON and car- ry out troubleshooting. Wiper switch Resistance 3 Defective monitor panel Max. 3 V Between (9) and Max. 3 V 20 – 30 V chassis ground (Constant period) 20-312 PC130-7...
  • Page 161 TROUBLESHOOTING [112] Circuit diagram related to wiper motor 20-313 PC130-7...

  • Page 162: Error Code [113] (Short Circuit In Wiper Motor Drive Reverse System)

    OFF, then turn starting switch ON and car- ry out troubleshooting. Wiper switch Resistance 3 Defective monitor panel Max. 3 V Between (10) and Max. 3 V 20 – 30 V chassis ground (Constant period) 20-314 PC130-7...
  • Page 163 TROUBLESHOOTING [113] Circuit diagram related to wiper motor 20-315 PC130-7...

  • Page 164: Error Code [114] (Short Circuit In Windshield Washer Drive System)

    Max. 1 V state ground aPrepare with starting switch OFF, then turn starting switch ON and car- ry out troubleshooting. Windshield washer Voltage 3 Defective monitor panel switch 20 – 30 V Between (3) and chassis ground Max. 1 V 20-316 PC130-7...
  • Page 165 TROUBLESHOOTING [114] Circuit diagram related to windshield washer motor 20-317 PC130-7...

  • Page 166: Error Code [115] (Trouble In Operation Of Windshield Wiper)

    OFF, then turn starting switch ON and car- ry out troubleshooting. Wiper blade Voltage 3 Defective monitor panel Top of operating range Max. 1 V Between (5) and Other than top of chassis ground 20 – 30 V operating range 20-318 PC130-7...
  • Page 167 TROUBLESHOOTING [115] Circuit diagram related to wiper motor 20-319 PC130-7...

  • Page 168: Error Code [116] (Trouble In Storage Of Windshield Wiper)

    OFF, then turn starting switch ON and car- ry out troubleshooting. Wiper blade Voltage 3 Defective monitor panel Storage range Max. 1 V Between (12) and chassis ground Operating range 20 – 30 V 20-320 PC130-7...
  • Page 169 TROUBLESHOOTING [116] Circuit diagram related to wiper motor 20-321 PC130-7...

  • Page 170: Error Code [203] (Short Circuit In Swing Holding Brake Solenoid)

    OFF, then start engine and carry out trou- bleshooting. Left work equipment Defective governor and Voltage control lever pump controller Neutral position Max. 1 V Between (37) and chassis ground Swing position 20 – 30 V 20-322 PC130-7...
  • Page 171 TROUBLESHOOTING [203] Circuit diagram related to swing holding brake solenoid 20-323 PC130-7...

  • Page 172: Error Code [205] (Short Circuit In 2-Stage Relief Solenoid)

    OFF, then turn starting switch ON and car- ry out troubleshooting. One-touch power max- Voltage Defective governor and imizing switch pump controller Released Max. 1 V Between (37) and 20 – 30 V chassis ground Kept pressed (With 8.5-sec timer) 20-324 PC130-7...
  • Page 173 TROUBLESHOOTING [205] Circuit diagram related to 2-stage relief solenoid 20-325 PC130-7...

  • Page 174: Error Code [206] (Short Circuit In Travel Speed Shifting Solenoid)

    OFF, then start engine and carry out trou- bleshooting. Travel speed switch Defective governor and Voltage and travel lever pump controller Lo + Neutral Max. 1 V Between (27) and chassis ground Hi + Travel position 20 – 30 V 20-326 PC130-7...
  • Page 175 TROUBLESHOOTING [206] Circuit diagram related to travel speed shifting solenoid 20-327 PC130-7...

  • Page 176: Error Code [213] (Disconnection In Swing Holding Brake Solenoid)

    OFF, then carry out troubleshooting with- out turning starting switch. Defective governor and C03 (female) Resistance Disconnect D01 and pump controller connect (3) and (7) on Between (37) and (3), 20 – 60 z female side. (13), (23) 20-328 PC130-7...
  • Page 177 TROUBLESHOOTING [213] Circuit diagram related to swing holding brake solenoid 20-329 PC130-7...

  • Page 178: Error Code [215] (Disconnection In 2-Stage Relief Solenoid)

    Max. 1 V wiring harness and chassis ground aPrepare with starting switch OFF, then carry out troubleshooting with- out turning starting switch. Defective governor and pump controller C03 (female) Resistance 20 – 60 z Between (37) and (3), (13), (23) 20-330 PC130-7...
  • Page 179 TROUBLESHOOTING [215] Circuit diagram related to 2-stage relief solenoid 20-331 PC130-7...

  • Page 180: Error Code [216] (Disconnection In Travel Speed Shifting Solenoid)

    Max. 1 V wiring harness and chassis ground aPrepare with starting switch OFF, then carry out troubleshooting with- out turning starting switch. Defective governor and pump controller C03 (female) Resistance 20 – 60 z Between (27) and (3), (13), (23) 20-332 PC130-7...
  • Page 181 TROUBLESHOOTING [216] Circuit diagram related to travel speed shifting solenoid 20-333 PC130-7...

  • Page 182: Error Code [217] (Abnormality In Input Model Code)

    OFF, then turn starting switch ON and car- ry out troubleshooting. C02 (female) Voltage Defective governor and Between (7), (13), (17) and pump controller 20 – 20 V chassis ground Between (27), (37), and chassis Max. 1 V ground 20-334 PC130-7...
  • Page 183 TROUBLESHOOTING [217] Circuit diagram related to model selection connector 20-335 PC130-7...

  • Page 184: Error Code [218] (Disconnection In S-Net Signal Line)

    Between (9), (10) and (20) 6 – 9 V aPrepare with starting switch OFF, then turn starting switch ON and car- ry out troubleshooting. Defective governor and pump controller Voltage Between (21) and (31) 6 – 9 V 20-336 PC130-7...
  • Page 185 TROUBLESHOOTING [218] Circuit diagram related to S-NET 20-337 PC130-7...

  • Page 186: Error Code [222] (Short Circuit In Ls-Epc Solenoid)

    OFF, then carry out troubleshooting with- out turning starting switch. Defective governor and Resistance pump controller 7 – 14 z Between (6) and (3), (13), (23) Between (6) and chassis ground Min. 1 Mz Circuit diagram related to LS-EPC solenoid 20-338 PC130-7...

  • Page 187: Error Code [223] (Disconnection In Ls-Epc Solenoid)

    OFF, then carry out troubleshooting with- out turning starting switch. Defective governor and pump controller Resistance 7 – 14 z Between (6) and (3), (13), (23) Circuit diagram related to LS-EPC solenoid 20-339 PC130-7...

  • Page 188: Error Code [224] (Abnormality In Pump Pressure Sensor)

    OFF, then turn starting switch ON and car- ry out troubleshooting. Defective governor and Voltage pump controller Between (22) and (10) Power supply 4.5 – 5.5 V Between (8) and (10) Signal 0.5 – 4.5 V 20-340 PC130-7...
  • Page 189 TROUBLESHOOTING [224] Circuit diagram related to pump pressure sensor 20-341 PC130-7...

  • Page 190: Error Code [226] (Abnormality In Pressure Sensor Power Supply)

    Min. 1 Mz Resistance [Overload pressure sensor system: If installed] aPrepare with starting switch OFF, then turn starting switch ON and car- ry out troubleshooting. Defective governor and pump controller Voltage Between (22) and (10) 4.5 – 5.5 V 20-342 PC130-7...
  • Page 191 TROUBLESHOOTING [226] Circuit diagram related to sensor power supply 20-343 PC130-7...

  • Page 192: Error Code [227] (Abnormality In Engine Speed Sensor)

    OFF, then carry out troubleshooting with- out turning starting switch. Defective governor and Resistance pump controller 500 – 1,000 z Between (40) and (29), (39) Between (40) and chassis ground Min. 1 Mz 20-344 PC130-7...
  • Page 193 TROUBLESHOOTING [227] Circuit diagram related to engine speed sensor 20-345 PC130-7...

  • Page 194: Error Code [232] (Short Circuit In Pc-Epc Solenoid)

    OFF, then carry out troubleshooting with- out turning starting switch. Defective governor and C03 (female) Resistance pump controller 7 – 14 z Between (16) and (3), (13), (23) Between (16) and chassis ground Min. 1 Mz 20-346 PC130-7...
  • Page 195 TROUBLESHOOTING [232] Circuit diagram related to PC-EPC solenoid 20-347 PC130-7...

  • Page 196: Error Code [233] (Disconnection In Pc-Epc Solenoid)

    OFF, then carry out troubleshooting with- out turning starting switch. Defective governor and C03 (female) Resistance pump controller Between (16) and (3), (13), 7 – 14 z and (23) 20-348 PC130-7...
  • Page 197 TROUBLESHOOTING [233] Circuit diagram related to PC-EPC solenoid 20-349 PC130-7...

  • Page 198: Error Code [251] (Abnormality In Overload Pressure Sensor)

    OFF, then turn starting switch ON and car- ry out troubleshooting. Defective governor and Voltage pump controller Between (22) and (10) Power supply 4.5 – 5.5 V Between (7) and (10) Signal 0.5 – 4.5 V 20-350 PC130-7...
  • Page 199 TROUBLESHOOTING [251] Circuit diagram related to overload pressure sensor 20-351 PC130-7...

  • Page 200: Error Code [301] (Engine Low Idling Speed Out Of Standard Range)

    Troubleshooting cannot be carried out since the defect is in the gover- state Defective governor and nor and pump controller. (If there is not any visible trouble in the pump controller machine, the controller may be used as it is.) 20-352 PC130-7...

  • Page 202: Error Code [306] (Abnormality In Governor Potentiometer)

    OFF, then turn starting switch ON and car- ry out troubleshooting. Defective governor and Voltage pump controller Between (22) and (21) Power supply 4.5 – 5.5 V Between (13) and (21) Signal 0.5 – 4.5 V 20-354 PC130-7...
  • Page 203 TROUBLESHOOTING [306] Circuit diagram related to governor motor and potentiometer 20-355 PC130-7...

  • Page 204: Error Code [308] (Abnormality In Fuel Control Dial)

    OFF, then turn starting switch ON and car- ry out troubleshooting. Defective governor and Voltage pump controller Between (22) and (21) Power supply 4.5 – 5.5 V Between (19) and (21) Signal 0.5 – 4.5 V 20-356 PC130-7...
  • Page 205 TROUBLESHOOTING [308] Circuit diagram related to fuel control dial 20-357 PC130-7...

  • Page 206: Error Code [315] (Short Circuit In Battery Relay Output Line)

    OFF, then turn starting switch ON and car- ry out troubleshooting. Defective governor and Starting switch Voltage pump controller Between (4) and 20 – 30 V ON o OFF chassis ground (For 4 – 7sec) 20-358 PC130-7...
  • Page 207 TROUBLESHOOTING [315] Circuit diagram related to battery relay 20-359 PC130-7...

  • Page 208: Error Code [316] (Step-Out Of Governor Motor)

    Troubleshooting cannot be carried out since the defect is in the control- Defective governor and ler (If none of causes 1 – 6 is the cause of the trouble, the controller is pump controller defective). 20-360 PC130-7...

  • Page 210: Error Code [317] (Disconnection In Phases A And B Of Governor Motor)

    OFF, then carry out troubleshooting with- out turning starting switch. Defective governor and C03 (female) Resistance pump controller 2.5 – 7.5 z Between (5) and (15) 2.5 – 7.5 z Between (25) and (35) 20-362 PC130-7...
  • Page 211 TROUBLESHOOTING [317] Circuit diagram related to governor motor and potentiometer 20-363 PC130-7...

  • Page 212: Error Code [318] (Short Circuit In Phases A And B Of Governor Motor)

    Between (25) and (35) pump controller Between (5) and chassis ground Min. 1 Mz Between (15) and chassis ground Min. 1 Mz Between (25) and chassis ground Min. 1 Mz Between (35) and chassis ground Min. 1 Mz 20-364 PC130-7...
  • Page 213 TROUBLESHOOTING [318] Circuit diagram related to governor motor and potentiometer 20-365 PC130-7...
  • Page 215 E-30 Monitoring function does not display "Travel" normally ..............20-458 E-31 Monitoring function does not display "service" normally..............20-460 E-32 Troubleshooting of air conditioner ..................... 20-464 E-33 Travel alarm does not sound or does not stop sounding..............20-475 20-401 PC130-7...

  • Page 216: Before Carrying Out Troubleshooting When Code Is Displayed

    Panel night light signal circuit Heated seat [If equipped] Heated seat [If equipped] Travel alarm [If equipped] DC/DC converter (Power supply to 12-V devices) Monitor panel (Constant power supply) Constant power supply Starting switch (Fusible link: A35) Room lamp (Spare) 20-402 PC130-7...

  • Page 217: Information In Troubleshooting Table

    • Connector No.: Shows the "Type-Number of pin" and "Color". • Branching/Merging point: Shows that there is a branching/merging point in the electric circuit to be checked. • Arrow ( ): Roughly shows the location on the machine. 20-403 PC130-7...

  • Page 218: Engine Does Not Start

    (Internal defect) chassis ground supply START Between C and Starting 20 – 30 V chassis ground output If the power supply and starting signal are normal and the starting motor does not rotate, the starting motor is defective. 20-404 PC130-7...
  • Page 219 Between A27 (female) (2) – E08 (male) (1) or source in wiring harness J02 or D01 (female) (6) or P02 (female) (11) or (Contact with 24-V circuit) Voltage Max. 1 V other related circuit wiring harness and chassis ground 20-405 PC130-7...
  • Page 220 TROUBLESHOOTING Circuit diagram related to engine preheating, starting, charging, and stopping functions 20-406 PC130-7...

  • Page 222: Engine Stops During Operation

    OFF, then turn starting switch ON and car- ry out troubleshooting. Defective governor and Voltage pump controller Between (22) and (21) Power supply 4.5 – 5.5 V Between (13) and (21) Signal 0.5 – 4.5 V 20-408 PC130-7...
  • Page 223 TROUBLESHOOTING Circuit diagram related to governor motor and potentiometer BWP13362 20-409 PC130-7...

  • Page 224: Engine Speed Is Unstable Or Engine Hunts

    Troubleshooting cannot be carried out since the defect is in the gover- Defective governor and nor and pump controller (If none of causes 1 – 6 is the cause of the trou- pump controller ble, the governor and pump controller is defective). 20-410 PC130-7...
  • Page 225 TROUBLESHOOTING Circuit diagram related to engine preheating, starting, charging, and stopping functions 20-411 PC130-7...

  • Page 226: Engine Does Not Stop

    OFF, then turn starting switch ON and car- ry out troubleshooting. Defective governor and Starting switch Voltage pump controller Between (4) and 20 – 30 V ON o OFF chassis ground (4 – 7 sec) 20-412 PC130-7...
  • Page 227 TROUBLESHOOTING Circuit diagram related to engine preheating, starting, charging, and stopping functions 20-413 PC130-7...

  • Page 228: Auto-Decelerator Does Not Operate

    Troubleshooting cannot be carried out since the defect is in the gover- 10 Defective governor and nor and pump controller (If none of causes 1 – 9 is the cause of the trou- pump controller ble, the governor and pump controller is defective). 20-414 PC130-7...

  • Page 229: Automatic Warm-Up System Does Not Operate

    Troubleshooting cannot be carried out since the defect is in the gover- Defective governor and nor and pump controller (If none of the above causes is the cause of the pump controller trouble, the governor and pump controller is defective). 20-415 PC130-7...

  • Page 230: Preheater Does Not Operate

    Wiring harness between H15 (female) (3) and Max. 1 z Resistance (Disconnection in wiring J02 and A25 harness or defective Max. 1 z Wiring harness between A22 and heater relay Resistance contact in connector) Max. 1 z Wiring harness between A26 and E01 Resistance 20-416 PC130-7...
  • Page 231 TROUBLESHOOTING Circuit diagram related to engine preheating, starting, charging, and stopping functions 20-417 PC130-7...

  • Page 232: Work Equipment, Swing, And Travel System Do Not Operate

    Resistance Min. 1 Mz harness and chassis ground (Contact with ground Between S14 (male) (2) – J02 – V01 (female) circuit) (1) or D01 (female) (4) wiring harness and Resistance Min. 1 Mz chassis ground 20-418 PC130-7...
  • Page 233 TROUBLESHOOTING Circuit diagram related to PPC lock solenoid 20-419 PC130-7...

  • Page 234: One-Touch Power Maximizing System Does Not Operate

    OFF, then turn starting switch ON and car- ry out troubleshooting. One-touch power Defective governor and Voltage maximizing switch pump controller Released Max. 1 V Between (11) and chassis ground Pressed 20 – 30 V Circuit diagram related to one-touch power maximizing switch 20-420 PC130-7...

  • Page 235: No Items Of Monitor Panel Light Up

    OFF. P01 (female) Starting switch Voltage/Resistance Between (1), (2) and 4 Defective monitor panel 20 – 30 V chassis ground Between (6), (7) and Max. 1 z chassis ground Circuit diagram related to monitor panel power supply 20-421 PC130-7...

  • Page 236: 7-Segment Led's Of Monitor Panel Does Not Light Up Partially

    [217]. Troubleshooting cannot be carried out since the defect is in the monitor 2 Defective monitor panel panel (If none of the above causes is the cause of the trouble, the moni- tor panel is defective). 20-422 PC130-7...

  • Page 237: When Starting Switch Is Turned On, Basic Check Items Light Up Or Flash

    If the time before the set engine oil replacement period is longer than 10 state 2 Defective monitor panel hours, the monitor panel is defective (Troubleshooting cannot be carried out since the defect is in the monitor panel). 20-423 PC130-7...

  • Page 238: While Engine Is Running, Caution Items Flash

    OFF, then turn starting switch ON and car- ry out troubleshooting. 4 Defective monitor panel E08 (female) Engine speed Voltage Between (1) and Above medium 20 – 30 V chassis ground (half) speed 20-424 PC130-7...
  • Page 239 TROUBLESHOOTING E-14 Circuit diagram related to engine preheating, starting, charging, and stopping functions 20-425 PC130-7...
  • Page 240 If the monitor flashes while the fuel level gauge is not in the red range state 2 Defective monitor panel (level 1), the monitor panel is defective (Troubleshooting cannot be car- ried out since the defect is in the monitor panel). 20-426 PC130-7...
  • Page 241 OFF, then start engine and carry out trou- bleshooting. Air cleaner Voltage 4 Defective monitor panel When normal Max. 1 V Between (5) and chassis ground When clogged 20 – 30 V Circuit diagram related to air cleaner clogging switch 20-427 PC130-7...

  • Page 242: While Engine Is Running, Emergency Stop Items Flash

    If the monitor flashes while the engine coolant thermometer is not in the state 2 Defective monitor panel red range (level 8, 9), the monitor panel is defective (Troubleshooting cannot be carried out since the defect is in the monitor panel). 20-428 PC130-7...
  • Page 243 OFF, then hold starting switch ON and start engine and carry out troubleshooting. Engine Voltage 4 Defective monitor panel When stopped 20 – 30 V Between (7) and chassis ground When operated Max. 1 V Circuit diagram related to engine oil pressure switch 20-429 PC130-7...

  • Page 244: Engine Coolant Thermometer Is Abnormal

    Engine coolant Resistance temperature 5 Defective monitor panel Between (1) and (13) 3.5 k – 90 kz 10 – 100 °C Between (1) and Min. 1 Mz chassis ground Circuit diagram related to engine coolant temperature sensor 20-430 PC130-7...

  • Page 245: Fuel Level Gauge Is Abnormal

    OFF, then carry out troubleshooting with- out turning starting switch. Fuel level Resistance 6 Defective monitor panel Approx. 12 z FULL (Upper limit) Between (2) and 85 – 120 z chassis ground EMPTY (Lower limit) Circuit diagram related to fuel level sensor 20-431 PC130-7...

  • Page 246: Swing Lock Monitor Is Abnormal

    Max. 1 V chassis ground aPrepare with starting switch OFF, then carry out troubleshooting with- out turning starting switch. Swing lock switch Voltage 5 Defective monitor panel 20 – 30 V Between (17) and chassis ground LOCK Max. 1 V 20-432 PC130-7...
  • Page 247 TROUBLESHOOTING E-18 Circuit diagram related to swing lock switch 20-433 PC130-7...

  • Page 248: When Monitor Switch Is Operated, Display By Lamp Does Not Change

    • When monitor switch is operated, display by lamp does not change. Related information Possible causes Cause Standard value in normal state/Remarks on troubleshooting and standard Troubleshooting cannot be carried out since the defect is in the monitor value in normal 1 Defective monitor panel panel. state 20-434 PC130-7...

  • Page 250: Windshield Wiper And Windshield Washer Do Not Operate

    OFF, then carry out troubleshooting with- out turning starting switch. Wiper switch Voltage Defective monitor panel Between (9) and Max. 1 V (Wiper motor system) chassis ground Max. 1 V 20 – 30 V Between (10) and (Constant period) chassis ground 20-436 PC130-7...
  • Page 251 TROUBLESHOOTING E-20 Circuit diagram related to wiper motor and window rear limit switch 20-437 PC130-7...
  • Page 252 OFF, then turn starting switch ON and car- ry out troubleshooting. Windshield washer Voltage 5 Defective monitor panel switch When OFF 20 – 30 V Between (3) and chassis ground When ON Max. 1 V 20-438 PC130-7...
  • Page 253 TROUBLESHOOTING E-20 Circuit diagram related to windshield washer motor 20-439 PC130-7...

  • Page 254: Lower Windshield Wiper Does Not Operate

    Between R18 (female) (3) – D03 (female) (1) or M92 (female) (1) wiring harness and chassis Min. 1 Mz Resistance ground Between R18 (female) (6) – M92 (female) (6) Min. 1 Mz Resistance wiring harness and chassis ground 20-440 PC130-7...
  • Page 255 TROUBLESHOOTING E-21 Circuit diagram related to lower windshield wiper 20-441 PC130-7...

  • Page 256: Caution Buzzer Does Not Stop

    OFF, then turn starting switch ON and car- ry out troubleshooting. Caution buzzer Voltage 5 Defective monitor panel stop switch Released 20 – 30 V Between (16) and chassis ground Pressed Max. 1 V 20-442 PC130-7...
  • Page 257 TROUBLESHOOTING E-22 Circuit diagram related to caution buzzer stop switch 20-443 PC130-7...

  • Page 258: Monitoring Function Does Not Display "Boom Raise" Normally

    OFF, then start engine and carry out trou- bleshooting. Right work equipment Defective governor and Voltage control lever pump controller Neutral position 20 – 30 V Between (10) and chassis ground Boom RAISE position Max. 1 V 20-444 PC130-7...
  • Page 259 TROUBLESHOOTING E-23 Circuit diagram related to boom RAISE oil pressure switch 20-445 PC130-7...

  • Page 260: Monitoring Function Does Not Display "Boom Lower" Normally

    OFF, then start engine and carry out trou- bleshooting. Right work equipment Defective governor and Voltage control lever pump controller Neutral position 20 – 30 V Between (10) and chassis ground Boom LOWER position Max. 1 V 20-446 PC130-7...
  • Page 261 TROUBLESHOOTING E-24 Circuit diagram related to boom LOWER oil pressure switch 20-447 PC130-7...

  • Page 262: Monitoring Function Does Not Display "Arm In" Normally

    OFF, then start engine and carry out trou- bleshooting. Left work equipment Defective governor and Voltage control lever pump controller Neutral position 20 – 30 V Between (30) and chassis ground Arm IN position Max. 1 V 20-448 PC130-7...
  • Page 263 TROUBLESHOOTING E-25 Circuit diagram related to arm IN oil pressure switch 20-449 PC130-7...

  • Page 264: Monitoring Function Does Not Display "Arm Out" Normally

    OFF, then start engine and carry out trou- bleshooting. Left work equipment Defective governor and Voltage control lever pump controller Neutral position 20 – 30 V Between (40) and chassis ground Arm OUT position Max. 1 V 20-450 PC130-7...
  • Page 265 TROUBLESHOOTING E-26 Circuit diagram related to arm OUT oil pressure switch 20-451 PC130-7...

  • Page 266: Monitoring Function Does Not Display "Bucket Curl" Normally

    OFF, then start engine and carry out trou- bleshooting. Right work equipment Defective governor and Voltage control lever pump controller Neutral position 20 – 30 V Between (9) and chassis ground Bucket CURL position Max. 1 V 20-452 PC130-7...
  • Page 267 TROUBLESHOOTING E-27 Circuit diagram related to bucket CURL oil pressure switch 20-453 PC130-7...

  • Page 268: Monitoring Function Does Not Display "Bucket Dump" Normally

    OFF, then start engine and carry out trou- bleshooting. Right work equipment Defective governor and Voltage control lever pump controller Neutral position 20 – 30 V Between (19) and chassis ground Bucket DUMP position Max. 1 V 20-454 PC130-7...
  • Page 269 TROUBLESHOOTING E-28 Circuit diagram related to bucket DUMP oil pressure switch 20-455 PC130-7...

  • Page 270: Monitoring Function Does Not Display "Swing" Normally

    OFF, then start engine and carry out trou- bleshooting. Left work equipment Voltage Defective governor and control lever pump controller Neutral position 20 – 30 V Between (29) and Swing LEFT or RIGHT chassis ground Max. 1 V position 20-456 PC130-7...
  • Page 271 TROUBLESHOOTING E-29 Circuit diagram related to swing LEFT oil pressure switch and RIGHT oil pressure switch 20-457 PC130-7...

  • Page 272: Monitoring Function Does Not Display "Travel" Normally

    OFF, then start engine and carry out trou- bleshooting. Travel lever Voltage Defective governor and pump controller Neutral position 20 – 30 V Between (39) and Forward or reverse chassis ground Max. 1 V operation 20-458 PC130-7...
  • Page 273 TROUBLESHOOTING E-30 Circuit diagram related to travel oil pressure switch and travel alarm 20-459 PC130-7...

  • Page 274: Monitoring Function Does Not Display "Service" Normally

    OFF, then start engine and carry out trou- bleshooting. Defective governor and Service pedal 1 Voltage pump controller Neutral position 20 – 30 V Between (35) and chassis ground Front or rear position Max. 1 V 20-460 PC130-7...
  • Page 275 TROUBLESHOOTING E-31 Circuit diagram related to service 1 oil pressure switches (front and rear) 20-461 PC130-7...
  • Page 276 OFF, then start engine and carry out trou- bleshooting. Defective governor and Service pedals 1 and 2 Voltage pump controller Neutral position 20 – 30 V Between (35) and chassis ground Front or rear position Max. 1 V 20-462 PC130-7...
  • Page 277 TROUBLESHOOTING E-31 Circuit diagram related to service 1 oil pressure switches (front and rear) and service 2 oil pressure switches (front and rear) 20-463 PC130-7...

  • Page 278: Troubleshooting Of Air Conditioner

    Finishing display of "Self-diagnosis notice" Abnormality in air outlet damper To finish display of the "Self-diagnosis notice", Abnormality in air mix damper press OFF switch (1) or turn the starting switch OFF. Abnormality in internal and exter- nal air damper 20-464 PC130-7...
  • Page 279 (female) (1) If neither of causes 1 and 2 is the cause of the trouble, the air condi- Defective air conditioner tioner system may be defective. See Shop Manual for Chassis Compo- system nents, Troubleshooting for air conditioner. 20-465 PC130-7...
  • Page 280 (female) (1) If neither of causes 1 and 2 is the cause of the trouble, the air condi- Defective air conditioner tioner system may be defective. See Shop Manual for Chassis Compo- system nents, Troubleshooting for air conditioner. 20-466 PC130-7...
  • Page 281 Resistance M29 (female) (9) If neither of causes 1 and 2 is the cause of the trouble, the air conditioner Defective air conditioner system may be defective. See Shop Manual for Chassis Components, system Troubleshooting for air conditioner. 20-467 PC130-7...
  • Page 282 Resistance M29 (female) (5) If neither of causes 1 and 2 is the cause of the trouble, the air conditioner Defective air conditioner system may be defective. See Shop Manual for Chassis Components, system Troubleshooting for air conditioner. 20-468 PC130-7...
  • Page 283 M33 (male) (3) If neither of causes 1 and 2 is the cause of the trouble, the air conditioner Defective air conditioner system may be defective. See Shop Manual for Chassis Components, system Troubleshooting for air conditioner. 20-469 PC130-7...
  • Page 284 TROUBLESHOOTING E-32 Circuit diagram related to air conditioner 20-470 PC130-7...
  • Page 285 M30, M29 Voltage 5 Defective control panel Between M30 (6) and M29 (12) 20 – 30 V If the above voltage is normal and the control panel does not operate, the control panel is defective. 20-471 PC130-7...
  • Page 286 Resistance M30 (female) (8) If none of causes 1 – 6 is the cause of the trouble, the air conditioner Defective air conditioner system may be defective. See Shop Manual for Chassis Components, system Troubleshooting for air conditioner. 20-472 PC130-7...
  • Page 287 Resistance E06 (female) (1) If none of causes 1 – 8 is the cause of the trouble, the air conditioner Defective air conditioner system may be defective. See Shop Manual for Chassis Components, system Troubleshooting for air conditioner. 20-473 PC130-7...
  • Page 288 TROUBLESHOOTING E-32 Circuit diagram related to air conditioner 20-474 PC130-7...

  • Page 289: Travel Alarm Does Not Sound Or Does Not Stop Sounding

    Troubleshooting cannot be carried out since the defect is in the travel 5 Defective travel alarm alarm (If none of the above causes 1 – 4 is the cause of the trouble, the travel alarm is defective). 20-475 PC130-7...
  • Page 290 TROUBLESHOOTING E-33 Circuit diagram related to travel oil pressure switch and travel alarm 20-476 PC130-7...
  • Page 291 H-24 Upper structure overruns remarkably when it stops swinging ............20-523 H-25 Large shock is made when upper structure stops swinging ............. 20-524 H-26 Large sound is made when upper structure stops swinging ............20-524 H-27 Hydraulic drift of swing is large ......................20-525 20-501 PC130-7...

  • Page 292: Information In Troubleshooting Table

    Possible causes of trouble and standard <Contents of description> (Given numbers are refer- value in normal • Standard value in normal state to judge possible causes ence numbers, which do not state • Remarks on judgment indicate priority) 20-502 PC130-7...

  • Page 294: Hydraulic And Mechanical System Diagram

    TROUBLESHOOTING HYDRAULIC AND MECHANICAL SYSTEM DIAGRAM HYDRAULIC AND MECHANICAL SYSTEM DIAGRAM 20-504 PC130-7...
  • Page 295 TROUBLESHOOTING HYDRAULIC AND MECHANICAL SYSTEM DIAGRAM a This system diagram is a rough general hydraulic circuit diagram made as reference material for trouble- shooting of the hydraulic and mechanical systems. 20-505 PC130-7...

  • Page 296: Speed Or Power Of Whole Work Equipment, Swing, And Travel Is Low

    6 Malfunction of servo piston The servo piston may have a malfunction. Check it directly. If none of above causes is the cause of the trouble, the cause may be 7 Defective piston pump lowering performance, malfunction, or internal defect of the piston pump. 20-506 PC130-7...

  • Page 297: Engine Speed Lowers Extremely Or Engine Stalls

    Clogging of orifice or filter The orifices or filters in the pump servo devices may be clogged. Check in serve devices them directly. 5 Malfunction servo piston The servo piston may have a malfunction. Check it directly. 20-507 PC130-7...

  • Page 298: Work Equipment, Swing, And Travel Systems Do Not Work

    Negative pressure may be applied to the suction circuit because of clog- strainer ging of the hydraulic tank strainer. Check the strainer directly. 5 Defective piston pump The piston pump may have a defect in it. Check it directly. 20-508 PC130-7...

  • Page 299: Auto-Decelerator Does Not Operate

    If the oil pressure does not become normal after adjustment, the LS valve may have a malfunction or a defect in it. Check the LS valve directly. 3 Defective servo piston The servo piston may have a malfunction. Check it directly. 20-509 PC130-7...

  • Page 300: Speed Or Power Of Boom Is Low

    The lock valve of the boom cylinder may have a malfunction. Check it der (lock valve) directly. aPrepare with engine stopped, then run engine at high idling and carry out troubleshooting. Malfunction of boom cylin- der (cylinder unit) Boom cylinder Leakage from cylinder Relieved in RAISE position 15 cc/min 20-510 PC130-7...

  • Page 301: Speed Or Power Of Arm Is Low

    (A trouble of the centralized safety-suction valve have bad effects on the suction valve boom and bucket.) aPrepare with engine stopped, then run engine at high idling and carry out troubleshooting. Malfunction of arm cylinder (cylinder unit) Arm cylinder Leakage from cylinder Relieved in IN position 15 cc/min 20-511 PC130-7...

  • Page 302: Speed Or Power Of Bucket Is Low

    (A trouble of the centralized safety-suction valve have bad effects on the suction valve boom and arm.) aPrepare with engine stopped, then run engine at high idling and carry out troubleshooting. Malfunction of bucket cylin- der (cylinder unit) Bucket cylinder Leakage from cylinder Relieved in CURL position 15 cc/min 20-512 PC130-7...

  • Page 303: Work Equipment Does Not Move Singly

    1 Malfunction of PPC valve Neutral value in normal {0 kg/cm state 2.84 – 3.43 MPa Operated {29 – 35 kg/cm Malfunction of control valve The spool of the control valve may have a malfunction. Check it directly. (spool) 20-513 PC130-7...

  • Page 304: Hydraulic Drift Of Work Equipment Is Large

    Check it directly. valve) The seal of the centralized safety-suction valve of the control valve may Defective seal of central- defective. Check it directly. ized safety-suction valve (A trouble of the centralized safety-suction valve have bad effects on arm.) 20-514 PC130-7...

  • Page 305: Time Lag Of Work Equipment Is Large

    {0 kg/cm value in normal state 2.84 – 3.43 MPa LOCK {29 – 35 kg/cm Malfunction of main relief The main relief valve of the control valve may have a malfunction. valve Check it directly. 20-515 PC130-7...

  • Page 306: In Compound Operation Of Work Equipment, Speed Of Part Loaded More Is Low

    (pressure com- malfunction. Check it directly. state pensation valve) Malfunction of travel control The pressure compensation valve of the travel control valve may have a valve (pressure compensa- malfunction. Check it directly. tion valve) 20-516 PC130-7...

  • Page 307: Machine Deviates During Travel

    Max. 10 l/min Leakage from travel motor The final drive may have a defect in it. Check it directly. (It may be 7 Defective final drive checked by abnormal sound, abnormal heating, metal chips in drain oil, etc.) 20-517 PC130-7...

  • Page 308: Travel Speed Is Low

    Max. 10 l/min Relieved in TRAVEL position The final drive may have a defect in it. Check it directly. (It may be 9 Defective final drive checked by abnormal sound, abnormal heating, metal chips in drain oil, etc.) 20-518 PC130-7...

  • Page 309: Machine Is Not Steered Well Or Steering Power Is Low

    {0 kg/cm state 2.84 – 3.43 MPa FORWARD or Hi position REVERSE position {29 – 35 kg/cm Malfunction of travel motor The speed shifting section of the travel motor may have a malfunction. (speed shifting section) Check it directly. 20-519 PC130-7...

  • Page 310: Travel Motor Does Not Work (Only One Side)

    Max. 10 l/min Relieved in TRAVEL position The final drive may have a defect in it. Check it directly. (It may be 5 Defective final drive checked by abnormal sound, abnormal heating, metal chips in drain oil, etc.) 20-520 PC130-7...

  • Page 311: Upper Structure Does Not Swing

    The spool of the swing control valve may have a malfunction. Check it trol valve (spool) directly. Defective seal of swing The seal of the suction valve of the swing motor may be defective. motor (suction valve) Check it directly. 20-521 PC130-7...

  • Page 312: Swing Acceleration Or Swing Speed Is Low

    The spool of the swing control valve may have a malfunction. Check it trol valve (spool) directly (including the stroke limiting mechanism). Defective seal of swing The seal of the suction valve of the swing motor may be defective. motor (suction valve) Check it directly. 20-522 PC130-7...

  • Page 313: Upper Structure Overruns Remarkably When It Stops Swinging

    The spool of the swing control valve may have a malfunction. Check it trol valve (spool) directly. Defective seal of swing The seal of the suction valve of the swing motor may be defective. motor (suction valve) Check it directly. 20-523 PC130-7...

  • Page 314: Large Shock Is Made When Upper Structure Stops Swinging

    (It may be checked by exchanging both valves and seeing the (suction valve) change of phenomenon.) The swing machinery may have a defect in it. Check it directly. (It may 4 Defective swing machinery be checked by abnormal sound, abnormal heating, metal chips in drain oil, etc.) 20-524 PC130-7...

  • Page 315: Hydraulic Drift Of Swing Is Large

    The seal of the suction valve of the swing control valve may be defec- control valve (suction state tive. Check it directly. valve) Defective seal of swing The seal of the shockless valve of the swing control valve may be defec- control valve (shockless tive. Check it directly. valve) 20-525 PC130-7...
  • Page 317 S-12 Oil pressure caution lamp lights up (Drop in oil pressure) ..............20-620 S-13 Oil level rises (Water, fuel in oil)......................20-621 S-14 Water temperature becomes too high (Overheating)................ 20-622 S-15 Abnormal noise is made ........................20-623 S-16 Vibration is excessive ........................20-624 20-601 PC130-7...

  • Page 318: Method Of Using Troubleshooting Charts

    (C) that he has obtained from his own inspection. [Troubleshooting] Troubleshooting is carried out in the order of probability, starting with the causes that have been marked as having the highest probability from information gained from [Questions] and [Check items]. 20-602 PC130-7...
  • Page 319 As a rule, do not use it when calculat- ing the points for locating the cause, but it can be included if necessary to determine the order for troubleshooting. Confirm recent repair history Degree of use Operated for long period 20-603 PC130-7...
  • Page 320 : Possible causes (judging from Questions and Check items) : Most probable causes (judging from Questions and Check items) : Possible causes due to length of use (used for a long period) : Items to confirm the cause. 20-604 PC130-7...
  • Page 321 [Clogged air cleaner element]. Follow this column down to the troubleshooting area and carry out the troubleshooting item marked The Remedy is given as [Clean], so carry out cleaning, and the exhaust gas color should return to normal. 20-605 PC130-7...

  • Page 322: Starting Performance Is Poor (Starting Always Takes Time)

    When control rack is pushed, it is found to be heavy or does not return (check after removing fuel injection pump) When fuel tank cap is inspected directly, it is found to be clogged Remedy Use a test stand when adjusting. 20-606 PC130-7...
  • Page 323 TROUBLESHOOTING Causes 20-607 PC130-7...

  • Page 324: Engine Does Not Start

    There is no 24V between battery relay terminal b and terminal E When ring gear is inspected directly, tooth surface is found to be chipped Cannot be moved by hand even when linkage of fuel cut solenoid is disconnected — Remedy 20-608 PC130-7...

  • Page 325: Engine Turns But No Exhaust Smoke Comes Out (Fuel Is Not Being Injected)

    When feed pump strainer is inspected directly, it is found to be clogged When fuel cap is inspected directly, it is found to be clogged Cannot be moved by hand even when linkage of fuel cut solenoid is disconnected Remedy 20-609 PC130-7...

  • Page 326: Exhaust Smoke Comes Out But Engine Does Not Start (Fuel Is Being Injected)

    When feed pump is operated, there is no response, or operation is too heavy Speed does not change when operation of certain cylinders is stopped When fuel tank cap is inspected directly, it is found to be clogged Remedy 20-610 PC130-7...

  • Page 327: Engine Does Not Pick-Up Smoothly (Follow-Up Is Poor)

    When valve clearance is checked directly, it is found to be outside standard value When fuel tank cap is inspected directly, it is found to be clogged When feed pump is operated, operation is too light or too heavy Remedy 20-611 PC130-7...

  • Page 328: Engine Stops During Operations

    When feed pump strainer is inspected directly, it is found to be clogged Inspect feed pump directly When control rack is pushed, it is found to be heavy, or does not return Remedy — 20-612 PC130-7...

  • Page 329: Engine Does Not Rotate Smoothly (Hunting)

    When fuel tank cap is inspected directly, it is found to be clogged When feed pump strainer is inspected directly, it is found to be clogged When fuel filter, strainer are inspected directly, they are found to be clogged Remedy 20-613 PC130-7...

  • Page 330: Engine Lacks Output (Or Lacks Power)

    When lever is placed at FULL position, it does not contact stopper When feed pump is operated, operation is too light or too heavy When fuel tank cap is inspected directly, it is found to be clogged Remedy 20-614 PC130-7...

  • Page 331: Exhaust Smoke Is Black (Incomplete Combustion)

    When valve clearance is checked directly it is found to be outside standard value When muffler is removed, exhaust color returns to normal When control rack is pushed, it is found to be heavy, or does not return Remedy 20-615 PC130-7...

  • Page 332: Oil Consumption Is Excessive (Or Exhaust Smoke Is Blue)

    Pressure-tightness test of oil cooler shows there is leakage Excessive play of turbocharger shaft Inspect rear seal directly When intake manifold is removed, dust is found inside When intake manifold is removed, inside is found to be dirty with oil Remedy 20-616 PC130-7...

  • Page 333: Oil Becomes Contaminated Quickly

    When oil cooler is inspected directly, it is found to be clogged Turbocharger oil drain tube is clogged Excessive play of turbocharger shaft When safety valve is directly inspected, spring is found to be catching or broken Remedy — 20-617 PC130-7...

  • Page 334: Fuel Consumption Is Excessive

    When check is made using delivery method, injection timing is found to be incorrect Remove head cover and inspect directly Remove feed pump and inspect directly When engine speed is measured, low idling and high idling speeds are found to be high Remedy 20-618 PC130-7...

  • Page 335: Oil Is In Cooling Water, Or Water Spurts Back, Or Water Level Goes Down

    Hydraulic oil, transmission oil is cloudy white When hydraulic oil, transmission oil is drained, water is found Pressure-tightness test of oil cooler shows there is leakage Pressure-tightness test of cylinder head shows there is leakage Remove oil pan and inspect directly Remedy 20-619 PC130-7...

  • Page 336: Oil Pressure Caution Lamp Lights Up (Drop In Oil Pressure)

    There is catching of relief valve or regulator valve, spring or valve guide is broken When oil level sensor is replaced, oil level sensor lamp goes out When oil pressure is measured, it is found to be within standard value Remedy — 20-620 PC130-7...

  • Page 337: Oil Level Rises (Water, Fuel In Oil)

    When pump auxiliary equipment is removed, seal is found to be damaged Remove head cover and inspect directly Remove injection pump and inspect directly Defective contact with thermostat seal valve Remove oil pan and check directly Remedy Remedy Remedy 20-621 PC130-7...

  • Page 338: Water Temperature Becomes Too High (Overheating)

    When oil cooler is inspected directly, it is found to be clogged When measurement is made with radiator cap tester, set pressure is found to be low When compression pressure is measured, it is found to be low Remove oil pan and inspect directly — Remedy 20-622 PC130-7...

  • Page 339: Abnormal Noise Is Made

    Injection pump test shows that injection amount is incorrect Fan is deformed, belt is loose When valve clearance is checked, it is found to be outside standard value Remove cylinder head cover and inspect directly When muffler is removed, abnormal noise disappears Remedy 20-623 PC130-7...

  • Page 340: Vibration Is Excessive

    Inspect inside of output shaft (damper) directly When face runout and radial runout are inspected, they are found to be incorrect Remove front cover and inspect directly Remove head cover and inspect directly Injection pump test shows that injection amount is incorrect Remedy 20-624 PC130-7...
  • Page 341 90 OTHERS HYDRAULIC CIRCUIT DIAGRAM............90- 3 ELECTRICAL CIRCUIT DIAGRAM (1/4) PC130-7 Serial No.: 70001 – 70013 ............. 90- 5 ELECTRICAL CIRCUIT DIAGRAM (2/4) PC130-7 Serial No.: 70001 – 70013 ............. 90- 7 ELECTRICAL CIRCUIT DIAGRAM (3/4) PC130-7 Serial No.: 70001 – 70013 ............. 90- 9 ELECTRICAL CIRCUIT DIAGRAM (4/4) PC130-7 Serial No.: 70001 –...

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