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SHAFT DRIVE
4-16
TOOTH CONTACT CHECKING
*
After bringing the backlash within specification
by changing the shim
between
the secondary
driven gear housing and crankcase,
it
will be
necessary t o check tooth contact.
*
Remove the four bolts and remove the second-
ary
driven gear
housing from the crankcase.
Clean and degrease the secondary driven gear
teeth,
and
apply a coating of machinist's layout
dye or paste
to
several
teeth.
Reinstall the secondary driven gear housing,
with correct shim, into
the
crankcase, and
torque the bolts to spwif icabion.
1
NOTE: No
O-ring is used a t
this
stage.
I
P
Turn the secondary driven gear flange several
turns
in both
directions.
Remove
the sxondary driven gear
housing
from
the
crankcase, and observe the tooth contact
pattern made in the dye or paste.
Compare the tooth contact pattern to the
examples as shown in
gAj
,
@I
and
:3'
If tooth
contact
is found to
be correct, go
the
Final Assembly sub-section, and complete.
*
If tooth contact i s found
to
be incorrect, the
shim between
the
secondary drive gear housing
and crankcase
must
be
changed, tooth contact
rechecked
until correct.
Tightening torque
2.0 -
2 . 6
kg-m
(14,s
-
19.0 Ib-ft)
1
Atrer the tooth
contact
adjustment is made,
I
the backlash
must
be rechecked, as it may
change. Refer to the backlash checking
1
Tooth contact
,
subsection, and readjust until both backlash
1
Shim thickness
L a n d t w t h contact
are
correct.
Contact
a t tooth
top
- . - r . -
Contact a t tooth
I- D : ;
; ; ;
; ; i
r n
top
g;,
.-
Contact
a t
tooth
root (3'
List
of shims
I
Increase
shim
thickness
1 : 3
Contact
at tooth
root
\
I
Part No.
24935
-
451
00
Shim thickness
-
0.35
mrn
I
24935 - 451 01
0.30
mm
24935 -
45102
24935
-
45103
24935 -
45104
0.40 mm
0.45
mm
0.50
mm
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