62
FW-003A
4. Install a new seal (F), output flange (G), washer, and nut
(coated with red Loctite #271) and tighten to 74 ft-lb.
GZ479B
NOTE: Do not use a new lock nut at this time as this
procedure may have to be repeated.
5. Place the assembled shaft into the left crankshaft case;
then lightly coat the gear teeth with machinist’s lay-
out dye. Rotate the shafts through several rotations in
both directions. Gear contact should extend from the
root to the top of the gear teeth.
MT016A
6. To adjust tooth contact, use the following chart to cor-
rectly shim the driven shaft.
7. After correct tooth contact is established, proceed to
Checking Backlash in this sub-section.
Checking Backlash
1. Install the drive bevel gear assembly and driven bevel
gear/output shaft assembly into the crankcase bottom
cover.
2. Mount the dial indicator so the tip is contacting a tooth
on the secondary drive bevel gear.
FW-008
3. Firmly hold the bearing down and while rocking the
drive bevel gear back and forth, note the maximum
backlash reading on the gauge.
GZ398
4. Acceptable backlash range is 0.127-0.381 mm (0.005-
0.015 in.).
Correcting Backlash
NOTE: If backlash measurement is within the
acceptable range, no correction is necessary.
1. If backlash measurement is less than specified,
remove an existing shim, measure it, and install a new
thinner shim.
FW-006A
Tooth Contact
Shim Correction
Contact at Top
Increase Shim Thickness
Contact at Root
Decrease Shim Thickness