wsm STW37 Workshop Manual page 347

STW34, STW37, STW40, WSM
Adjusting Backlash and Tooth Contact between Spiral Bevel
Pinion Shaft and Spiral Bevel Gear
1. Set a dial gauge (lever type) with its finger on the spline of spiral
bevel pinion shaft.
2. Measure the backlash by moving the spiral bevel pinion shaft by
hand lightly.
3. If the backlash is not within the factory specification, change the
adjusting collars (3), (4). Change the adjusting collar (4) to
0.1 mm (0.004 in.) smaller size, and change the adjusting collar
(3) to 0.1 mm (0.004 in.) larger size.
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 spiral bevel gear (1).
6. Turn the spiral bevel pinion shaft (2).
7. Check the tooth contact. If not proper, adjust with shim (5) and
adjusting collars (3), (4) according to the instructions below:
Backlash between spiral
bevel pinion shaft and Factory specification
spiral bevel gear
(Reference)
• Thickness of adjusting collars (3), (4):
4.7 mm (0.185 in.)
4.8 mm (0.189 in.)
4.9 mm (0.193 in.)
5.0 mm (0.197 in.)
5.1 mm (0.201 in.)
5.2 mm (0.205 in.)
5.3 mm (0.209 in.)
5.4 mm (0.213 in.)
• Thickness of adjusting shims (5):
1.6 mm (0.063 in.)
1.7 mm (0.067 in.)
1.8 mm (0.071 in.)
1.9 mm (0.075 in.)
2.0 mm (0.079 in.)
2.1 mm (0.083 in.)
2.2 mm (0.087 in.)
NOTE
• After checking the tooth contact, checking the backlash
between spiral bevel pinion shaft and spiral bevel gear
again.
(1) Spiral Bevel Gear
(2) Spiral Bevel Pinion Shaft
(3) Adjusting Collar
6-S12
FRONT AXLE
0.1 to 0.3 mm
0.004 to 0.012 in.
(4) Adjusting Collar
(5) Shim
9Y1211109FAS0021US0
KiSC issued 11, 2014 A