Komatsu PW98MR-10 Operation & Maintenance Manual page 302

TROUBLES AND ACTIONS
Problem
The engine does not start even if the
key in the starting switch is turned to
START position and the starting mo-
tor rotates.
PHENOMENA AND ACTIONS FOR CHASSIS
• 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
Speed of travel, swing, boom, arm,
bucket is slow
Pump generates abnormal noise.
(sucking in air)
Excessive rise in hydraulic oil temper-
ature
Boom rises slowly or does not rise.
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.
3-234
Main causes
Defective engine controller power
supply circuit
Defective relay
Defective connector on engine side
Main causes
Lack of hydraulic oil
Clogged element in hydraulic tank
strainer, lack of oil
Loose fan belt
Dirty oil cooler
Lack of hydraulic oil
Lack of hydraulic oil
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
WENAM00061
Remedy
Replace. (*)
Replace. (*)
Check and repair loose or discon-
nected connector or wire breakage.
(*)
Remedy
Set oil to specified level. See
CHECKS BEFORE STARTING.
Clean. See EVERY 2000 HOURS
MAINTENANCE.
Check fan belt tension and replace.
Clean. See EVERY 500 HOURS
MAINTENANCE.
Set oil to specified level. See
CHECKS BEFORE STARTING.
Set oil to specified level. See
CHECKS BEFORE STARTING.
Remedy
Set oil to specified 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. (*)
OPERATION