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Problem
Main causes
Remedy
The engine does not start even if the
key in the starting switch is turned to
START position and the starting mo-
tor rotates.
Defective engine controller power
supply circuit
Replace. (*)
Defective relay
Replace. (*)
Defective connector on engine side
Check and repair loose or discon-
nected connector or wire breakage.
(*)
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
Main causes
Remedy
Speed of travel, swing, boom, arm,
bucket is slow
Lack of hydraulic oil
Set oil to specified level. See
CHECKS BEFORE STARTING.
Pump generates abnormal noise.
(sucking in air)
Clogged element in hydraulic tank
strainer, lack of oil
Clean. See EVERY 2000 HOURS
MAINTENANCE.
Excessive rise in hydraulic oil temper-
ature
Loose fan belt
Check fan belt tension and replace.
Dirty oil cooler
Clean. See EVERY 500 HOURS
MAINTENANCE.
Lack of hydraulic oil
Set oil to specified level. See
CHECKS BEFORE STARTING.
Boom rises slowly or does not rise.
Lack of hydraulic oil
Set oil to specified level. See
CHECKS BEFORE STARTING.
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
Main causes
Remedy
Engine oil pressure caution lamp
lights up.
Lowered oil level in engine oil pan
(sucking in air)
Set oil to specified level. See
CHECKS BEFORE STARTING.
Improper oil is used. (Viscosity is im-
proper.)
Replace oil. See METHOD FOR US-
ING FUEL, COOLANT AND LUBRI-
CANTS ACCORDING TO AMBIENT
TEMPERATURE and KOMATSU
GENUINE LUBRICANTS.
Clogged oil filter cartridge
Replace cartridge. See EVERY 500
HOURS MAINTENANCE.
Oil leakage due to improper connec-
tion or breakage of oil pipe or pipe
joint
Check, repair. (*)
Defective engine oil pressure sensor
Replace sensor. (*)
Defective monitor
Replace monitor. (*)
TROUBLES AND ACTIONS
OPERATION
3-234
WENAM00061
Summary of Contents for PW98MR-10
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Page 9: ...Do not repeatedly handle and lift loads FOREWORD VIBRATION LEVELS 1 7 WENAM00061...
Page 68: ...WENAM00061...
Page 73: ...CONTROLS AND GAUGES NAMES OPERATION GENERAL VIEW 3 5 WENAM00061...
Page 157: ...SWITCHES OPERATION EXPLANATION OF COMPONENTS 3 89 WENAM00061...
Page 388: ...WENAM00061...
Page 389: ...SPECIFICATIONS 5 1 WENAM00061...
Page 392: ...RKA55390 SPECIFICATIONS SPECIFICATIONS 5 4 WENAM00061...
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Page 429: ...REPLACEMENT PARTS 7 1 WENAM00061...
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