Checking The Differential Gear; Assembling The Front Constant Velocity Joints - Yamaha YFM45FXV Supplementary Service Manual

FRONT CONSTANT VELOCITY JOINTS AND
DIFFERENTIAL GEAR

CHECKING THE DIFFERENTIAL GEAR

1. Check:
• gear teeth
Pitting/galling/wear → Replace drive pinion
gear and differential gear unit as a set.
• bearings
Pitting/damage → Replace.
• oil seal
• O-ring
Damage → Replace.
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.
ASSEMBLING THE FRONT CONSTANT
VELOCITY JOINTS
1. Apply:
• molybdenum disulfide grease
(into the ball joint assembly)
NOTE:
Molybdenum disulfide grease is included in the
repair kit.
2. Install:
• dust boots 1
• dust boot bands 2, 3
M MMM M MMM M M MMM
a. Apply molybdenum disulfide grease into the
dust boots.
Molybdenum disulfide grease
20 g (0.7 oz) per dust boot (front
wheel side)
35 g (1.2 oz) per dust boot (dif-
ferential gear case side)
– 68 –
DRIV
New
M M MMM M M MMM M M MMM M MMM