9-S22
F2880, F3680, RCK72-F36, RCK72R-F36, RCK60-F36, RCK60R-F36, WSM
MOWER
[4] SERVICING
Checking Torque of Pinion Shaft
â–
• Do not remove the mower belt.
1. Wind a string around the pinion shaft and set a push-pull gauge
to the end of the string, and then slowly pull the push-pull gauge
horizontally to measure the turning force.
2. If the measurement exceeds the factory specification, check the
bearing and gears and adjust the adjusting shims (1), (2), (3).
(Reference)
• Thickness of adjusting shims (1), (2) : 0.2 mm (0.0079 in.)
0.3 mm (0.0118 in.)
• Thickness of adjusting shims (3) : 0.1 mm (0.0039 in.)
0.2 mm (0.0079 in.)
W1024471
Backlash between Bevel Gears
1. Remove the gear box cap.
2. Place fuses the bevel gear on the pinion shaft.
3. Turn the pinion shaft.
4. Take out the fuses, and measure the thickness of fuses with an
outside micrometer. (Backlash equal thickness of fuse)
5. If the backlash is not within the factory specifications, adjust with
shims (1), (2), (3).
6. Apply red lead lightly over several teeth at three positions equally
spaced on the bevel gear.
7. Turn the pinion shaft.
8. Check the tooth contact. If not correct, adjust with shim (1), (2),
(3).
â–
• After checking the tooth contact, checking the backlash
between pinion shaft and bevel gear again.
(Reference)
• Thickness of adjusting shims (1), (2) : 0.2 mm (0.0079 in.)
0.3 mm (0.0118 in.)
• Thickness of adjusting shims (3) : 0.1 mm (0.0039 in.)
0.2 mm (0.0079 in.)
W1024912
Turning force Factory spec.
490 N
Less than 50 kgf
110 lbs
Turning torque Factory spec.
5.9 N·m
Less than 0.6 kgf·m
4.3 ft-lbs
(1) Shim
(2) Shim
(3) Shim
Backlash between bevel
gears
Factory spec.
0.13 to 0.25 mm
0.0052 to 0.0098 in.
(1) Shim
(2) Shim
(3) Shim
[A] Correct Contact :
More than 35 % red lead contact
area on the gear tooth surface.
The center of tooth contact at 1/3
of the entire width from the small
end.
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