Yamaha YFM660FS, Supplementary Service Manual

Page: 339 / 478

7 - 11
DRIV
FRONT CONSTANT VELOCITY JOINTS AND
DIFFERENTIAL GEAR
2.Check:
●
Drive shaft splines
●
Universal joints
●
Front drive gear splines
Wear/damage
→
Replace.
●
Spring
Fatigue
→
Replace.
Move the spring up and down.
3.Check:
●
Front drive shaft
Bends
→
Replace.
WARNING
Do not attempt to straighten a bent shaft;
this may dangerously weaken the shaft.
CHECKING THE GEAR MOTOR
1.Check:
●
Gear motor
*****************************************************
Checking steps:
●
Connect two C size batteries to the gear
motor terminals
1
. (as shown illustration)
CAUTION:
Do not use a 12 V battery to operate the
pinion gear.
È
Check that the pinion gear
2
turns counter-
clockwise.
É
Check that the pinion gear
2
turns clockwise.
NOTE:
Be sure not to disassemble gear motor and
remove the pinion gear.
*****************************************************
È
É
ASSEMBLING THE FRONT CONSTANT
VELOCITY JOINT
1.Apply:
●
Molybdenum disulfide grease
(into the ball joint assembly)
NOTE:
Molybdenum disulfide grease is included in the
repair kit.