Checks Before Troubleshooting - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02628-04

Checks before troubleshooting

1.Check of level and type of fuel
2.Check of fuel for foreign matter
3. Check of hydraulic oil level
4. Check of hydraulic oil strainer
Lubricating
5. Check of swing machinery oil level
oil/Coolant
6. Check of level and type of engine oil (in oil pan)
7. Check of coolant level
8. Check of dust indicator for clogging
9. Check of hydraulic oil filter
1.Check of battery voltage (with engine stopped)
Electrical 2. Check of alternator terminals and wiring for looseness and corro-
equipment sion
3. Check of starting motor terminals and wiring for looseness and
corrosion
1. Check for abnormal noise and smell
Hydrau-
lic/Mechani-
2. Check for oil leakage
cal
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,
electrical
5.Check of wires for wetness (Check connectors and terminals for
equipment
wetness, in particular)
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
40 Troubleshooting
Criterion Remedy
— Addoil
— Clean and drain
— Add oil
— Clean and drain
— Add oil
— Add oil
— Add coolant
Clean or
—
replace
— Replace
Retighten or
—
replace
Retighten or
—
replace
Retighten or
—
replace
— Repair
— Repair
— Bleed air
20 – 30 V Replace
— Add or replace
— Replace
— Repair
Disconnect the
— connectors and
— Replace
After operating for
several minutes: Replace
27.5–29.5 V
— Replace
PC300, 350-8
dry