Checks Before Troubleshooting - Komatsu PC130-8 Shop Manual

SEN04118-02

Checks before troubleshooting

1. Check of level and type of fuel
2. Check of fuel for foreign matter
3. Check of fuel filter
4. Check of hydraulic oil level
5. Check of hydraulic oil strainer
Lubricating
oil/Coolant
6. Check of swing machinery oil level
7. Check of level and type of engine oil (in oil pan)
8. Check of coolant level
9. Check of dust indicator for clogging
10. Check of hydraulic oil filter
1. Check of battery terminals and wiring for loose-
ness and corrosion
Electrical 2. Check of alternator terminals and wiring for
equipment looseness and corrosion
3. Check of starting motor terminals and wiring for
looseness and corrosion
1. Check for abnormal noise and smell
Hydraulic/
Mechanical 2. Check for oil leakage
equipment
3. Bleeding air
1. Check of battery voltage (with engine stopped)
2. Check of electrolyte level
3. Check of wires for discoloration, burn, and
removal of cover
4. Check for released wire clamp and drooping wire
Electric,
5. Check of wires for wetness (Check connectors
electrical
and terminals for wetness, in particular)
equipment
6. Check of fuse for disconnection and corrosion
7. Check of alternator voltage (while engine speed
is at middle or higher)
8. Check of battery relay for operating sound (when
starting switch is turned ON or OFF)
4
Item Criterion
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
20 – 30 V
—
—
—
—
—
After operating for several
minutes: 27.5 – 29.5 V
—
40 Troubleshooting
1
Remedy
Add fuel
Clean and drain
Replace
Add fuel
Clean and drain
Add fuel
Add fuel
Add coolant
Clean or replace
Replace
Retighten or replace
Retighten or replace
Retighten or replace
Repair
Repair
Bleed air
Replace
Add or replace
Replace
Repair
Disconnect the
connectors and dry
Replace
Replace
Replace
PC130-8