4-38 SHAFT DRIVE AND DIFFERENTIAL
TOOTH CONTACT
After
backlash adjustment is carried out, the tooth contact must
be checked. Pay attention to the following procedures:
•
Remove
the final driven bevel gear.
•
Clean
and
degrease several teeth
on
the final driven bevel
gear and apply
a
coating
of
machinist's layout dye
or
paste
to
teeth.
•
Install
the
final driven bevel gear with
the
shims
in
place,
positioning the coated teeth
so
that they are centered
on
the
final
drive bevel gear.
•
Install the final driven gear bearing case,
and
then tighten
the
bolts to the specified torque.
[5 Driven gear bearing
case
bolt:
23 N m (2.3 kgf-m, 16.5
Ib-ft)
NOTE:
At this time, it is not
necessary
to install the
O-ring.
•
Rotate the final drive bevel gear several turns
in
each direc-
tion,
while placing
a
load
on
the final driven bevel gear. This
will
provide
a
contact pattern
on
the coated teeth
of
the final
drive bevel gear.
•
Remove
the final drive bevel gear and compare the coated
teeth
to the examples shown in
©, ©
and
®.
•
If the tooth contact is found to
be
correct (example
®),
go to
the
Final Assembly sub-section on
p.
4-42 to complete instal-
lation.
©
Incorrect (contact at tooth top)
©
Correct
®
Incorrect (contact at tooth root)
• If
tooth contact
is
found
to be
incorrect (examples
©
and
®), the
shim thickness between
the
final drive gear
bearing and final gear case must
be
changed and the tooth
contact
rechecked until it is correct.
Tooth contact
Shim thickness
Contact at tooth top
©
Decrease
shims
©
Contact at tooth root
©
Increase shims
©
A CAUTION
Make
sure to check the backlash and clearance
after
the
tooth
contact has been adjusted, since it may
have changed. Adjust the
tooth
contact and backlash
until
they
are
both
within
specification. If the correct
tooth
contact cannot be maintained when adjusting
the backlash, replace the
final
drive and driven bevel
gears.
©
List
of shims © (Rear drive bevel
gear housing shims) (CU
3
4-41)
Part No.
Shim thickness (mm)
27445-18B00-030
0.30
27445-18B00-035
0.35
27445-18B00-040
0.40
27445-18B00-050
0.50
27445-18B00-060
0.60
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