Troubleshooting - Yamaha Wolverine YX70EPNG Service Manual

EBS20058

TROUBLESHOOTING

The following conditions may indicate damaged shaft drive components:
Symptoms
1. A pronounced hesitation or "jerky" movement
during acceleration, deceleration, or sustained
speed. (This must not be confused with engine
surging or transmission characteristics.)
2. A "rolling rumble" noticeable at low speed; a high-
pitched whine; a "clunk" from a shaft drive com-
ponent or area.
3. A locked-up condition of the shaft drive train
mechanism, no power transmitted from the en-
gine to the front and/or rear wheels.
TIP
Areas A, B, and C above may be extremely difficult to diagnose. The symptoms are quite subtle and
difficult to distinguish from normal vehicle operating noise. If there is reason to believe these compo-
nents are damaged, remove the components and check them.
TROUBLESHOOTING
Possible Causes
A. Bearing damage.
B. Improper gear backlash.
C. Gear tooth damage.
D. Broken drive shaft.
E. Broken gear teeth.
F. Seizure due to lack of lubrication.
G. Small foreign objects lodged between the moving
parts.
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