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OPERATION
Problem
Excessive rise in hydraulic oil temper-
ature
Track comes off.
Abnormal wear of sprocket
Boom rises slowly or does not rise.
Does not swing.
PHENOMENA AND ACTIONS FOR ENGINE RELATED PARTS
•
For the remedies indicated with (*) in the remedy column, always contact your Komatsu distributor.
•
In cases of problems or causes which are not listed below, ask your Komatsu distributor for repairs.
Problem
Engine oil pressure caution lamp
lights up.
Main causes
Loose fan belt
Dirty oil cooler
Lack of hydraulic oil
Track too loose
Track too loose
Lack of hydraulic oil
Swing lock switch still applied
Swing brake system error
Main causes
Lowered oil level in engine oil pan
(sucking in air)
Improper oil is used. (Viscosity is im-
proper.)
Clogged oil filter cartridge
Oil leakage due to improper connec-
tion or breakage of oil pipe or pipe
joint
Defective engine oil pressure sensor
Defective monitor
TROUBLES AND ACTIONS
Remedy
Check fan belt tension and replace.
(*)
Clean. See EVERY 500 HOURS
MAINTENANCE.
Set oil to specified level. See
CHECKS BEFORE STARTING.
Adjust track tension, see WHEN RE-
QUIRED.
Adjust track tension, see WHEN RE-
QUIRED.
Set oil to specified level. See
CHECKS BEFORE STARTING.
Turn swing lock switch OFF.
Check, adjust. (*)
When move of machine to safe place
is required, turn the swing parking
brake cancel switch to ON position
temporarily.
Remedy
Set it to specified oil level. See
CHECKS BEFORE STARTING.
Replace oil. See METHOD FOR US-
ING FUEL, COOLANT AND LUBRI-
CANTS ACCORDING TO AMBIENT
TEMPERATURE and KOMATSU
GENUINE LUBRICANTS.
Replace cartridge. See EVERY 500
HOURS MAINTENANCE.
Check, repair. (*)
Replace sensor. (*)
Replace monitor. (*)
3-265
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