Vibration Is Excessive - Komatsu PC200-8M0 Shop Manual

600 Troubleshooting of engine (S-mode)
S-16 Vibration is excessive
S-16 Vibration is excessive
General causes why vibration is excessive
q
Defective parts (premature wear or breakage)
q
Misalignment between engine snd hydraulic pump
q
Abnormal combustion
a If unusual noise is made and vibration is excessive, perform troubleshooting also
for "S-15 Unusual noise is made".
Check recent repair history.
Machine opera-
Operated for long period
tion hours
Suddenly increased.
Vibration
Gradually increased.
Oil other than specified one is used
Metal particles are found in the removed oil filter.
Metal particles are found in oil drained from oil pan.
Oil pressure is low at low idle.
Vibration occurs at mid-range speed.
Vibration follows engine speed.
Exhaust smoke is black.
Check valve system.
Check main bearing and connecting rod bearing.
Check gear train.
Check camshaft bushing.
Check the condition by using monitoring function of machine monitor.
Check engine mounting bolts and cushions.
When radial runout and facial runout are checked, misalignment is found.
Check inside of damper chamber.
PC200, 200LC, 220, 220LC-8M0
SEN06140-00
Cause
E E E
Q
Q Q Q
Q Q
w w
w w
Q Q
Q
Q Q Q Q
w Q
q
q
q
q
q
q
Remedy
40-600
Q
Q
q
q
23