Yamaha YFM400FAR, Service Manual

Page: 231 / 481

7 - 3
DRIV
TROUBLESHOOTING
Troubleshooting chart
When basic condition “a” and “b” exist, check the following points:
Elevate and spin both wheels. Feel for
wheel bearing damage.
YES
Replace the wheel bearings.
(Refer to “STEERING SYSTEM” and
“REAR SHOCK ABSORBER AND
SWINGARM” in CHAPTER 8.)
NO
Check the wheel nuts and hub nuts for
tightness.
NO
Torque to specification.
(Refer to “FRONT AND REAR WHEELS”
in CHAPTER 8.)
YES
Check the constant velocity joints. Feel for
bearing damage.
NO
Constant velocity joint bearings and
differential gear bearings are probably not
damaged. Repeat the test or remove the
individual components.
YES
Check the rear brake adjustment.
NO
Adjust per instructions.
(Refer to “ADJUSTING THE REAR
BRAKE” in CHAPTER 3.)
YES
Check the rear axle. Feel for bearing
damage.
NO
Rear axle bearings and rear drive shaft
bearings are probably not damaged.
Repeat the test or remove the individual
components.
YES
Remove the rear axle. Check for axle
bearing damage.
YES
Replace the rear axle bearings.
(Refer to “REAR AXLE/FINAL DRIVE
GEAR AND DRIVE SHAFT”.)
NO
Remove the drive shaft components.