wsm STW37 Workshop Manual page 287

STW34, STW37, STW40, WSM
Adjusting of Hypoid Pinion Motive Force
1. Assemble the hypoid pinion assembly and tighten the lock nut
(2) lightly with new one.
2. Rotate the hypoid pinion with applying the transmission oil to the
bearings after tapping the hypoid pinion to front and rear
direction by the soft hammer.
3. Tighten the lock nut (2) until the motive force (hypoid pinion start
to rotate) of hypoid pinion to be factory specification.
4. Stake the lock nut (2) firmly.
Motive force Factory specification
Motive torque Factory specification
(1) Bearing Holder
(2) Lock Nut
(3) Hypoid Pinion
Backlash and Tooth Contact between Hypoid Pinion and
Hypoid Ring Gear
1. Set a dial gauge with its finger on the tooth surface of hypoid
ring gear.
2. Measure the backlash by fixing the hypoid pinion and moving
hypoid ring gear by hand.
3. If the backlash exceeds the factory specification, change the
collar to chick it, and change the shims to thin it.
If the backlash is less than factory specification, change the
collars and the shims as an opposite.
4. Apply red lead lightly over several teeth at three positions
equally spaced on the hypoid ring gear.
5. Turn the hypoid pinion while pressing a wooden piece against
the periphery of the bevel gear.
6. Check the tooth contact, if not proper, adjust according to the
following instruction.
Backlash between
hypoid pinion and hypoid Factory specification
ring gear
Tooth contact Factory specification
The position of tooth
Factory specification
contact point
3-S73
TRANSMISSION
10.8 to 16.7 N
1.1 to 1.7 kgf
2.43 to 3.75 lbf
0.520 to 0.559 N·m
0.053 to 0.057 kgf·m
0.383 to 0.412 lbf·ft
(4) Convex Part
(5) Pulling Direction
9Y1211109TRS0083US0
0.1 to 0.3 mm
0.004 to 0.001 in.
More than 25 % red lead
contact area on the gear
tooth surface
The center of tooth contact
at 3/10 to 4/10 of the entire
width from the small end
9Y1211109TRS0084US0
KiSC issued 11, 2014 A