Komatsu 80001 User Manual

40 Troubleshooting SEN04125-02
PC130-8
25
S-16 Vibration is excessive 1
General causes why vibration is excessive
q Defective parts (abnormal wear, breakage)
q Misalignment between engine and chassis
q Abnormal combustion
a If abnormal noise is made and vibration is excessive, carry out trouble-
shooting for “S-15 Abnormal noise is made”, too.
Causes
Stuck dynamic valve system (valve, rocker lever) Worn main bearing, connecting rod bearing Improper gear train backlash Worn camshaft bushing Improper fuel injection timing (abnormality in coolant temperature sensor, boost temperature sensor) Loose engine mounting bolts, broken cushions Broken output shaft, parts in damper
Questions
Confirm recent repair history
Degree of use of machine Operated for long period EE E
Condition of vibration
Suddenly increased QQ
Gradually increased QQ Q
Non-specified oil is being used QQ
Metal particles are found when oil filter is drained ww
Metal particles are found when oil pan is drained ww
Check items
Oil pressure is low at low idle QQ
Vibration occurs at mid-range speed QQ
Vibration follows engine speed QQQ
Exhaust smoke is black wQ
Troubleshooting
Inspect dynamic valve system directly q
Inspect main bearing and connecting rod bearing directly q
Inspect gear train directly q
Inspect camshaft bushing directly q
Confirm with monitoring function q
Inspect engine mounting bolts and cushions directly q
Inspect output shaft or inside of damper directly q
Remedy
Replace Replace Replace Replace Replace Replace Replace

Komatsu 80001 Specifications

General

Brand	Komatsu
Model	80001
Category	Excavators
Language	English