Vibration Is Excessive - Komatsu PC130-7 Shop Manual

TROUBLESHOOTING
S-16 Vibration is excessive
a If there is abnormal noise together with the vibra-
tion, carry out troubleshooting also for
"
noise is made .
General causes why vibration is excessive
• Defective parts (abnormal wear, breakage)
• Improper alignment
• Abnormal combustion
Confirm recent repair history
Degree of use of machine
Condition of vibration
Non-specified oil is being used
Metal particles are found in oil filter
Metal particles are found when oil is drained
Oil pressure is low at low idling
Vibration occurs at mid-range speed
Vibration follows engine speed
Exhaust smoke is black
Seal on injection pump has come off
Remove oil pan and inspect directly
Remove side cover and inspect directly
Inspect directly for loose engine mounting bolts, broken cushion
Inspect inside of output shaft (damper) directly
When face runout and radial runout are inspected, they are
found to be incorrect
Remove front cover and inspect directly
Remove head cover and inspect directly
Injection pump test shows that injection amount is incorrect
20-624
(1)
"
Abnormal
Operated for long period
Suddenly increased
Gradually increased
Remedy
Causes
S-16
PC130-7