Kubota WSM STa-30, Workshop Manual

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3-S32
ST
α
-30 · ST
α
-35, WSM TRANSMISSION
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.
W1028110
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.
W1028399
Motive force Factory spec.
10.9 to 16.7 N
1.1 to 1.7 kgf
2.5 to 3.7 lbs
Motive torque Factory spec.
0.520 to 0.559 N·m
0.053 to 0.057 kgf·m
0.383 to 0.412 ft-lbs
(1) Bearing Holder
(2) Lock Nut
(3) Hypoid Pinion (4) Convex Part
(5) Pulling Direction
Backlash between
hypoid pinion and
hypoid ring gear
Factory spec.
0.20 to 0.30 mm
0.0078 to 0.0118 in.
Tooth contact Factory spec.
More than 25 % red lead
contact area on the gear
tooth surface
The position of tooth
contact point
Factory spec.
the center of tooth contact
at 3/10 of the entire width
from the small end
KiSC issued 11, 2006 A