SEN02462-00 40 Troubleshooting
4 PC138US, USLC-8
Checks before troubleshooting 1
Item Criterion Remedy
Lubricating
oil/Coolant
1. Check of level and type of fuel — Add fuel
2. Check of fuel for foreign matter — Clean and drain
3. Check of fuel filter — Replace
4. Check of hydraulic oil level — Add fuel
5. Check of hydraulic oil strainer — Clean and drain
6. Check of swing machinery oil level — Add fuel
7. Check of level and type of engine oil (in oil pan) — Add fuel
8. Check of coolant level — Add coolant
9. Check of dust indicator for clogging — Clean or replace
10. Check of hydraulic oil filter — Replace
Electrical
equipment
1. Check of battery terminals and wiring for loose-
ness and corrosion
— Retighten or replace
2. Check of alternator terminals and wiring for
looseness and corrosion
— Retighten or replace
3. Check of starting motor terminals and wiring for
looseness and corrosion
— Retighten or replace
Hydraulic/
Mechanical
equipment
1. Check for abnormal noise and smell — Repair
2. Check for oil leakage — Repair
3. Bleeding air — Bleed air
Electric,
electrical
equipment
1. Check of battery voltage (with engine stopped) 20 – 30 V Replace
2. Check of electrolyte level — Add or replace
3. Check of wires for discoloration, burn, and
removal of cover
—Replace
4. Check for released wire clamp and drooping wire — Repair
5. Check of wires for wetness (Check connectors
and terminals for wetness, in particular)
—
Disconnect the
connectors and dry
6. Check of fuse for disconnection and corrosion — Replace
7. Check of alternator voltage (while engine speed
is at middle or higher)
After operating for several
minutes: 27.5 – 29.5 V
Replace
8. Check of battery relay for operating sound (when
starting switch is turned ON or OFF)
—Replace
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