wsm M8540NARROW, Workshop Manual

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TRANSMISSION M8540Narrow, M9540Narrow, WSM
N3-S38
(2) Backlash and Tooth Contact (Except ITA Model)
Backlash and Tooth Contact between Spiral Bevel Gear and
Spiral Bevel Pinion Shaft
1. Set the dial indictor (lever type) with its finger on the tooth
surface.
2. Measure the backlash by fixing the spiral bevel pinion shaft (1)
and moving the spiral bevel gear (3) by hand.
3. When the backlash is too large, decrease the number of shims
(4).
When the backlash is too small, increase the number of shims
(4).
4. Adjust the backlash properly by repeating the above procedure.
5. Apply red lead lightly over several teeth at three positions
equally spaced on the spiral bevel gear.
6. Turn the spiral bevel pinion shaft, while pressing a wooden
piece against the periphery on the spiral bevel gear.
7. Check the tooth contact. If not proper, adjust according to the
instructions next page.
(Reference)
• Thickness of adjusting shim (4)
0.3 mm (0.012 in.)
1.0 mm (0.039 in.)
1.2 mm (0.047 in.)
1.4 mm (0.055 in.)
1.6 mm (0.063 in.)
• Thickness of adjusting collar (2)
2.8 mm (0.110 in.)
3.0 mm (0.118 in.)
3.2 mm (0.126 in.)
3.4 mm (0.134 in.)
3.6 mm (0.142 in.)
(To be continued)
Backlash between spiral
bevel gear and spiral
bevel pinion shaft
Factory specification
0.2 to 0.3 mm
0.0079 to 0.0118 in.
Allowable limit
0.4 mm
0.016 in.
(1) Spiral Bevel Pinion Shaft
(2) Adjusting Collar (3) Spiral Bevel Gear
(4) Shim
KiSC issued 07, 2013 A