Vibration Is Excessive - Komatsu Galeo PC800-8 Shop Manual

SEN00795-02
S-16 Vibration is excessive
General causes why vibration is excessive
• Defective parts (abnormal wear, breakage)
• Misalignment between engine and chassis
• Abnormal combustion
aIf abnormal noise is made and vibration is excessive, carry out troubleshoot-
ing for "S-15 Abnormal noise is made", too.
Confirm recent repair history
Degree of use of
Operated for long period
machine
Suddenly increased
Condition of
vibration
Gradually increased
Non-specified fuel is being used
Metal particles are found when oil filter is drained
Metal particles are found when oil pan is drained
Oil pressure is low at low idle
Vibration occurs at mid-range speed
Vibration follows engine speed
Exhaust smoke is black
Inspect dynamic valve system directly
Inspect main bearing and connecting rod bearing directly
Inspect gear train directly
Inspect camshaft bushing directly
Check with monitoring function of machine monitor
Inspect engine mounting bolts and cushions directly
Inspect front support spigot joint portion directly
Inspect output shaft or inside of damper directly
28
Causes
E
Q
Q Q
Q Q
w w
w w
Q Q
Q
w
q
q
q
q
q
Remedy
40 Troubleshooting
E E
Q
Q Q
Q Q
Q Q Q
q
q
Q
PC800, 850-8