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Komatsu PC130-7 Service Manual (EN)
Komatsu · 342 стр.
Komatsu PC130-7 Service Manual (EN)
Оригинальное название: Komatsu PC130-7 Engine and Maintenance Manual
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Содержание
20-201--.pdf
1
POINTS TO REMEMBER WHEN TROUBLESHOOTING
92
1. When carrying out troubleshooting, do not hurry to disassemble the components.
92
2. Points to ask user or operator
92
1) Have any other problems occurred apart from the problem that has been reported?
92
2) Was there anything strange about the machine before the failure occurred?
92
3) Did the failure occur suddenly, or were there problems with the machine condition before this?
92
4) Under what conditions did the failure occur?
92
5) Had any repairs been carried out before the failure?
92
6) Has the same kind of failure occurred before?
92
3. Check before troubleshooting
92
1) Check the oil level
92
2) Check for any external leakage of oil from the piping or hydraulic equipment.
92
3) Check the travel of the control levers.
92
4) Check the stroke of the control valve spool.
92
5) Other maintenance items can be checked externally, so check any item that is considered to be ...
92
4. Confirming failure
92
5. Troubleshooting
92
1) Start from the simple points.
92
2) Start from the most likely points.
92
3) Investigate other related parts or information.
92
6. Measures to remove root cause of failure
92
SEQUENCE OF EVENTS IN TROUBLESHOOTING
93
POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE
94
To maintain the performance of the machine over a long period, and to prevent failures or other t...
94
1. Points to remember when handling electric equipment
94
1) Handling wiring harnesses and connectors
94
1) Defective contact of connectors (defective contact between male and female)
94
2) Defective crimping or soldering of connectors
94
3) Disconnections in wiring
95
4) High-pressure water entering connector
95
5) Oil or dirt stuck to connector
95
2) Removing, installing, and drying connectors and wiring harnesses
96
1) Hold the connectors when disconnecting.
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2) When removing from clips
96
3) Action to take after removing connectors
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1) Check the connector visually.
97
1) Check that there is no oil, dirt, or water stuck to the connector pins (mating portion).
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2) Check that there is no deformation, defective contact, corrosion, or damage to the connector p...
97
3) Check that there is no damage or breakage to the outside of the connector.
97
2) Fix the connector securely.
97
3) Correct any protrusion of the boot and any misalignment of the wiring harness
97
4) If the connector clamp has been removed, be sure to return it to its original position. Check ...
97
1) Disconnect the connector and wipe off the water with a dry cloth.
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2) Dry the inside of the connector with a dryer.
98
3) Carry out a continuity test on the connector.
98
3) Handling control box
99
1) The control box contains a microcomputer and electronic control circuits. These control all of...
99
2) Do not open the cover of the control box unless necessary.
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3) Do not place objects on top of the control box.
99
4) Cover the control connectors with tape or a vinyl bag.
99
5) During rainy weather, do not leave the control box in a place where it is exposed to rain.
99
6) Do not place the control box on oil, water, or soil, or in any hot place, even for a short time.
99
7) Precautions when carrying out arc welding
99
2. Points to remember when troubleshooting electric circuits
99
1) Always turn the power OFF before disconnecting or connect connectors.
99
2) Before carrying out troubleshooting, check that all the related connectors are properly inserted.
99
3) Always connect any disconnected connectors before going on to the next step.
99
4) When carrying out troubleshooting of circuits (measuring the voltage, resistance, continuity, ...
99
3. Points to remember when handling hydraulic equipment
100