40 Troubleshooting SEN00458-01
114E-3 Series
23
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 trou-
bleshooting 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
Misalignment between engine and devices on applicable machine side
Broken output shaft, parts in damper on applicable machine side
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 QQQQ
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 INSITE or with monitoring function on applicable machine side q
Inspect engine mounting bolts and cushions directly q
When alignment is checked, radial runout or facial runout is detected q
Inspect output shaft or inside of damper directly q
Remedy
Replace
Replace
Replace
Replace
Replace
Replace
Adjust
Replace
To Next Page
Loading...
Need help?
General
