Kubota ZD221-48 Workshop Manual page 171

ZD221, WSM
TRANSAXLE
Backlash and Tooth Contact between 19T Bevel Gear and 16T
Bevel Gear
1. Measure the backlash between the 19T (2) bevel gear and 16T
(3) bevel gear.
2. When the backlash is too large, decrease the number of shims in
the side of the spiral bevel gear, and insert the removed shims in
the opposite side, When the backlash is too small, decrease the
number of shims in the side of the differential case, and insert the
removed shims in the opposite side.
3. Adjust the backlash properly by repeating the above procedure.
4. Apply red lead lightly over several teeth at three positions equally
spaced on the hypoid ring gear.
5. Turn the 19T bevel gear by input shaft while pressing a wooden
piece against the periphery of the bevel gear.
6. Check the tooth contact, if not proper, adjust according to the
following instruction.
Backlash between 16T
bevel gear and 19T
bevel gear
Factory spec.
0.13 to 0.25 mm
0.0052 to 0.0098 in.
More than 25
%
red lead
Tooth contact Factory spec. contact area on the gear
tooth surface
The position of tooth
contact point
Factory spec.
the center of tooth contact
at
3/10
of the entire width
from the small end
(1) Shim (4) Joint Shaft
(2) 19T Bevel Gear (5) Shim
(3) 16T Bevel Gear
W1026662
2-S25