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
• 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
Main causes
Remedy
Speed of travel, swing, boom, arm,
bucket is slow
Lack of hydraulic oil
Make the oil filled to the specified lev-
el by referring to CHECKS BEFORE
STARTING.
Pump generates unusual noise.
(sucking air)
Element blocked in the filter of the
hydraulic tank, 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 coolant
Clean. See EVERY 500 HOURS
MAINTENANCE.
Lack of hydraulic oil
Add oil to the specified level. See
CHECKS BEFORE STARTING.
Boom rises slowly or does not rise.
Lack of hydraulic oil
Add oil to the specified level. See
CHECKS BEFORE STARTING.
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
Main causes
Remedy
Engine oil pressure caution lamp lights
up.
Insufficient oil in engine oil pan
(sucking in air)
Add oil to the 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 is leaked due to improper con-
nection or breakage of oil pipe or
pipe joint.
Check, repair (*)
Defective engine oil pressure sensor Replace sensor (*)
Defective monitor
Replace monitor (*)
OPERATION
TROUBLES AND ACTIONS
3-253
WENAM00130
Summary of Contents for PW118MR-11
Page 2: ......
Page 9: ...Do not repeatedly handle and lift loads FOREWORD VIBRATION LEVEL 1 7 WENAM00130...
Page 22: ...WENAM00130...
Page 25: ...LOCATION OF SAFETY LABELS RKA64590 SAFETY SAFETY LABELS 2 3 WENAM00130...
Page 72: ...WENAM00130...
Page 74: ...GENERAL VIEW MACHINE EQUIPMENT NAME RKA61930 GENERAL VIEW OPERATION 3 2 WENAM00130...
Page 77: ...CONTROLS AND GAUGES NAMES RKA62690 OPERATION GENERAL VIEW 3 5 WENAM00130...
Page 168: ...SWITCHES RKA63060 EXPLANATION OF COMPONENTS OPERATION 3 96 WENAM00130...
Page 328: ...WENAM00130...
Page 412: ...WENAM00130...
Page 413: ...SPECIFICATIONS 5 1 WENAM00130...
Page 445: ...REPLACEMENT PARTS 7 1 WENAM00130...
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