WEICHAI WP7 Euro VI, Руководство пользователя по эксплуатации и обслуживанию

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Operation & Maintenance Manual for WP7 Euro
Ⅵ
Vehicle Diesel Engine
17
3.11 Loud noise
Causes Troubleshooting
1. Poor fuel quality Replace the fuel
2. Cooling water has low temperature
Check the thermostat or replace it if
necessary
3. Wrong valve timing or injection timing Adjust
4. Injector nozzle has poor atomization Check and repair
5. Injection pump injects too much oil
Check and adjust (by specialized
operator)
6. Shock absorber is damaged
Check if the absorber is damaged; check
the connecting bolts and replace them if
necessary
7. The valve has leakage or improperly
adjusted
Disassemble the valve and adjust
8. Too large gap between gears or some tooth
is broken
Check and replace the damaged parts
9. Cylinder liner or piston is worn or scuffing Check, repair or replace
10. Push rod is bent or broken Replace
11. Piston ring is broken or worn Replace
12. Bearing is worn seriously Replace
13. Excessive crankshaft thrust bearing
clearance
Replace
14. Main bushing is not concentric Replace
15. The crankshaft is not coaxial with the
main shaft of driven parts
Check the bolts on the mounting bracket
and repair
16. Parts are worn seriously, requiring an
overhaul
Overhaul
17. Turbocharger surges
Remove dirt and blockage in the
compressor
flow passage and
accumulated carbon in the exhaust path
18. Sealing ring of the turbocharger is burnt Replace
19. Turbocharger bearing is damaged; moving
part rubs against fixed part
Replace
20. Foreign matters come into the turbine or
the compressor impeller of turbocharger
Replace