6D81G11
6-26
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2
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Shimming
NOTE:
• Shimming is not required when assembling
the original lower case and inner parts.
• Shimming is required when assembling the
original inner parts and a new lower case.
• Shimming is required when replacing the
inner part(s).
Selecting the pinion shims
1. Calculate the specified value (M0) as
shown in the examples below.
NOTE:
“P” is the deviation of the lower case dimen-
sion from standard. The “P” mark
a
is
stamped on the trim tab mounting surface of
the lower case in 0.01 mm units. If the “P”
mark unreadable, assume that “P” is zero
and check the backlash when the unit is
assembled.
Example:
If “P” is “+5”, then
M0 = 0.20 + (+5)/100 mm = 0.20 + 0.05 mm
= 0.25 mm
If “P” is “–5”, then
M0 = 0.20 + (–5)/100 mm = 0.20 – 0.05 mm
= 0.15 mm
2. Install the drive shaft and drive shaft
bearing
1
to the special service tools.
3. Attach the clamp
2
to the gauge base
using the bolts of an appropriate size.
NOTE:
Tighten the clamp bolts another 1/4 of a turn
after they contact the clamp
2
.
4. Install the pinion and pinion nut, and then
tighten the nut to the specified torque.
NOTE:
Install the special service tools onto the drive
shaft so that the shaft is at the center of the
hole.
Specified value (M0) = 0.20 + P/100 mm
S68S6250
P
R
+
5
F
+
5
a
Pinion shim selecting tool:
YB-34432-9
3
, YB-34432-10A
4
,
YB-34432-11A
5
, YB-34432-17
2
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