4-24 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 differential driven bevel
gear.
•
Clean
and
degrease
several teeth
on
the differential driven
bevel gear and apply
a
coating
of
machinist's layout dye
or
paste to the teeth.
•
Install
the
differential driven bevel gear
with
the
shims
in
place, positioning the coated teeth so that they are centered
on the differential drive bevel
gear.
•
Install
the
differential 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 shifting related
parts
and
O-ring.
•
Rotate the differential drive bevel gear several turns
in
each
direction,
while putting
a
load
on
the driven bevel
gear.
This
will
provide
a
contact pattern on the coated teeth.
•
Remove
the differential drive bevel gear and compare
the
coated teeth to the examples shown in
©, ©
and
©.
•
If the tooth contact pattern is correct (example
®),
go to the
Final Assembly sub-section
on p.
4-27 to complete installa-
tion.
©
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
differential drive
and driven housing must
be
changed and the tooth contact
rechecked until it is correct.
ACAUTIOiNT
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 differential drive and driven
bevel gears.
Tooth contact
Shim
thickness
Contact at tooth top
©
Decrease
shims
©
Contact at tooth root
®
Increase shims
©
©
List
of shims © available for the
dif-
ferential drive bevel gear housing.
(C^
3
4-28)
Part No. Shim thickness (mm)
27445-19B00-015
0.15
27445-19B00-030
0.30
27445-19B00-035
0.35
27445-19B00-040
0.40
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