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4-35 SHAFT flRlVE
TOOTH CONTACT ADJUSTMENT
After backlash adjustment is carried out, the
tooth contact must be checked.
@
Remove the 10 bolts from the final gear case,
and
remove the case, using the 6 mrn screws
(see
page
4-21
1.
Do
not
misplace the shims.
Remove
the driven
gear.
Clean and de-grease several teeth on the final
driven gear. Coat these teeth with machinist's
dye (usually available
from parts
houses) or
paste, preferably of a light color.
Re-install the driven
gear
with shims in place,
positioning the coated teeth s o they are centered
on
the final drive
gear.
*
Re-install the final gear case and bolts, and
tighten
to
specification.
bolt tightening
2.0
- 2 . 6
kg-m
torque
(14.5
-
19.0
Ib-ft)
Using a socket and handle on the final drive
gear coupling nut, rotate
the final drive gear
several turns in each direction, while loading the
final driven gear. This will provide a contact
pattern on
the
mated teeth
of the driven
gear.
Remove the final gear case and final gear, and
inspect the coated teeth of the driven gear.
The contact patch should be
as
shown below:
If the tooth contact pattern is correct, as shown
in (BJ, go to the Final Assembly section.
If
the tooth contact pattern is incorrect, as
shown in
(CF,
a thinner shim is needed between
the final drive gear housing and final gear case.
I f the tooth contact pattern
is
incorrect, as
shown in (A), a thicker
shim is needed
between
the final drive gear housing 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
re-
checked by repeating the
tooth
coating
proce-
dure above.
I B )
CORRECT
1NCORRECT (CONTACT AT TOOTH TOP)
(CI
\
l NCOR RECT (CONTACT
A T
TOOTH ROOT)
I
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