TRANSMISSION
L3301, L3901, L4701, WSM
3-S105
Spiral Bevel Pinion Turning Torque (with Differential Gear)
1. Grip the spiral bevel pinion nut with a torque wrench and
measure the turning torque.
2. If the turning torque is not within the factory specifications,
check the differential gear turning force, backlash and tooth
contact again.
9Y1211012TRS0150US0
Backlash and Tooth Contact between Bevel Gear and 6T Spiral
Bevel Pinion
1. Set the dial indicator (lever type) with its finger on the tooth
surface.
2. Measure the backlash by fixing the 6T spiral bevel pinion and
moving the bevel gear by hand.
3. If the backlash exceeds the factory specification, decrease the
number of shims at right bearing case (right) and insert the
removed shims to the left bearing case (left).
If the backlash is less than the factory specification, decrease
the number of shims at left bearing case (left) and insert the
removed shims to the right bearing case (right).
4. Adjust the backlash properly by repeating the above
procedures.
5. Apply red lead lightly over several teeth at three positions
equally spaced on the bevel gear.
6. Turn the 6T spiral bevel pinion while pressing a wooden piece
against the periphery of the bevel gear.
7. Check the tooth contact. If not proper, adjust according to the
instructions below.
(Reference)
• Thickness of differential side shims:
0.1 mm (0.004 in.)
0.2 mm (0.007 in.)
0.5 mm (0.02 in.)
• Thickness of spiral bevel pinion shims:
0.1 mm (0.004 in.)
0.2 mm (0.007 in.)
0.5 mm (0.02 in.)
9Y1211012TRS0151US0
Differential gear rotating
torque (Combined)
Factory specification
3.9 to 6.3 N·m
0.40 to 0.6 kgf·m
2.9 to 4.6 lbf·ft
Backlash between spiral
bevel gear and 8T spiral
bevel pinion
Factory specification
0.15 to 0.30 mm
0.0059 to 0.011 in.
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