Komatsu PW118MR-11 Operation & Maintenance Manual page 325

OPERATION
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
• Contact your Komatsu distributor for the remedies indicated with (*) in the remedy column.
• 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 unusual noise.
(sucking air)
Excessive rise in hydraulic oil temper-
ature
Boom rises slowly or does not rise.
PHENOMENA AND ACTIONS FOR ENGINE RELATED PARTS
• Contact your Komatsu distributor for the remedies indicated with (*) in the remedy column.
• 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
Defective engine controller power
supply circuit
Defective relay
Defective connector on engine side
Main causes
Lack of hydraulic oil
Element blocked in the filter of the
hydraulic tank, lack of oil
Loose fan belt
Dirty oil coolant
Lack of hydraulic oil
Lack of hydraulic oil
Main causes
Insufficient oil in engine oil pan
(sucking in air)
Improper oil is used. (Viscosity is im-
proper.)
Clogged oil filter cartridge
Oil is leaked due to improper con-
nection or breakage of oil pipe or
pipe joint.
Defective engine oil pressure sensor Replace sensor (*)
Defective monitor
WENAM00130
TROUBLES AND ACTIONS
Remedy
Replace. (*)
Replace. (*)
Check and repair loose or discon-
nected connector or wire breakage.
(*)
Remedy
Make the oil filled to the specified lev-
el by referring to CHECKS BEFORE
STARTING.
Clean. See EVERY 2000 HOURS
MAINTENANCE.
Check fan belt tension and replace.
Clean. See EVERY 500 HOURS
MAINTENANCE.
Add oil to the specified level. See
CHECKS BEFORE STARTING.
Add oil to the specified level. See
CHECKS BEFORE STARTING.
Remedy
Add oil to the 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 monitor (*)
3-253