Drive Chain / Drive Train / Drive Shaft: 3A-27
• Using a socket and handle on the final drive bevel
gear coupling nut, rotate the final drive bevel gear
several turns in each direction, while loading the final
driven bevel gear. This will provide a contact pattern
on the coated teeth of the driven bevel gear.
• Remove the final gear bearing case and final driven
bevel gear, and inspect the coated teeth of the driven
bevel gear. The contact patch should be as shown in
the figure of contact position:
• If the tooth contact pattern is incorrect, as shown in
[A], a thinner shim (4) is needed between the final
drive bevel gear bearing and final gear case.
• If the tooth contact pattern is incorrect, as shown in
[C], a thicker shim (4) is needed between the final
drive bevel gear bearing and final gear case.
• If the tooth contact pattern is incorrect for either
reason, the appropriate shim must be installed, and
the tooth contact pattern rechecked by repeating the
tooth coating procedure above.
NOTE
If it is necessary to adjust the shim (4)
thickness between final drive bevel gear
bearing and final gear case, the final gear
backlash may change, and should be
rechecked according to the procedure
outlined under the Backlash Measurement
sub-section. Both adjustments may be
needed until both backlash and tooth contact
are correct.
Contact Position
List of shims (4)
4
FWD
I822H1310107-03
[A]: Incorrect (Contact at tooth top)
[B]: Correct
[C]: Incorrect (Contact at tooth root)
Part number Shim thickness
27445-24810
(Shim set: 5
pcs.)
27445-24A01-030 0.30 mm (0.012 in)
27445-24A01-035 0.35 mm (0.014 in)
27445-24A01-040 0.40 mm (0.016 in)
27445-24A01-050 0.50 mm (0.020 in)
27445-24A01-060 0.60 mm (0.024 in)
[A]
[B]
[C]
I822H1310039-06
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