TRANSMISSION
M6040, M7040, WSM
3-S59
(3) Backlash and Tooth Contact (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.
8. Check the clearance between 33T G-PTO gear (2) and external
circlip (8), if the measurement is not within the factory
specification, change the collar 2 (7) to become the clearance is
within the factory specification.
(When reassembling)
• Assemble the adjusting collar 1 (6) and 2 (7) direction as shown
figure.
(Reference)
• Thickness of adjusting shim (4)
0.1 mm (0.004 in.) [Code No. 3C081-32130]
0.3 mm (0.012 in.) [Code No. 3C081-32140]
0.5 mm (0.020 in.) [Code No. 3C081-32150]
• Thickness of adjusting collar (6) and (7)
2.8 mm (0.11 in.) [Code No. 36200-32621]
3.0 mm (0.12 in.) [Code No. 36200-32631]
3.20 mm (0.126 in.) [Code No. 36200-32651]
3.4 mm (0.13 in.) [Code No. 36200-32671]
3.6 mm (0.14 in.) [Code No. 36200-32691]
• Combination of adjusting collar 1 (6) and 2 (7).
(To be continued)
Clarence between 33T
G-PTO gear and external
circlip
Factory specification
Less than
0.2 mm
0.0079 in.
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.
Adjusting Collar 1 Adjusting Collar 2
2.8 mm (0.11 in.) 3.6 mm (0.14 in.)
3.0 mm (0.12 in. 3.4 mm (0.13 in.) STD
3.20 mm (0.126 in.) 3.20 mm (0.126 in.)
3.4 mm (0.13 in.) 3.0 mm (0.12 in.
3.6 mm (0.14 in.) 2.8 mm (0.11 in.)
(1) Spiral Bevel Pinion Shaft
(2) 33T G-PTO Gear
(3) Spiral Bevel Gear
(4) Shim
(5) Differential Gear Case
(6) Adjusting Collar 1
(7) Adjusting Collar 2
(8) External Circlip
F: Forward
R: Rearward
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