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12-50 FIN AL DRIVE
Front Final Gear Case
○
The tooth contact patterns of both (drive and coast) sides
should be centrally located between the top and bottom
of the tooth. The drive pattern can be a little closer to the
toe and the coast pattern can be a somewhat longer and
closer to the toe.
If the tooth contact pattern is incorrect, replace the ring
gear shim(s), following the examples shown.
•
Then erase the tooth contact patterns and check them
again. Also check the backlash every time the shim(s)
are replaced. Repeat the shim change procedure as nec-
essary.
NOTE
○
If the backlash is out of the standard r ange after
changing the ring gear shim(s), change the pinion gear
shim(s) to correct the backlash before checking the
tooth contact pattern.
Bevel Gear Inspection
•
Visually check the bevel gears [A] for scoring, chipping,
or other damage.
Replace the bevel gears as a set if either gear is dam-
aged.
Differential Gear Inspection
•
Visually check the differential gears [A] for scoring, chip-
ping, or other damage.
Replace the differential gears as a set if either gear is
damaged.
•
Also, inspect the differential gear shaft [B], gear case [C],
and cover [D] where the differential gears rub.
If they are scored, discolored, or otherwise damaged, re-
place them as a set.