Spicer Drive Axles Service Manual G & M - Manual (Page 18)

PINION POSITION
16
PINION SETTING
The following examples illustrate how the carrier etch
and the pinion etch interact:
EXAMPLE "A" EXAMPLE "B"
Number etched on
nose of pinion
+3 -2
Number etched on
carrier
63 61
Add or subtract pinion
etch from carrier etch
to get correct pinon
.063 .061
postion spacer. -.003 +.002
.060 .063
Select a pinion postion spacer that is closest to the
calculated value from table.
NOTE: The pinion position spacer functions as a
selective shim to determine the position of the pinion
mounting distance.
Pinion position spacers (selective) are available in
the following thicknesses.
Inches MM
.052 1.321
.055 1.397
.058 1.473
.061 1.549
.064 1.626
.067 1.702
.070 1.778
.073 1.854
.076 1.930
.079 2.007
.082 2.083
NOTE: Measure the new pinion position spacer with a
micrometer before assembly to insure correct thickness.
Be sure mounting surfaces and shims are free of dirt and
nicks prior to assembly or leaks will occur and pinion
position can be affected.
When a new gear set is being installed, use a micrometer
to measure the thickness of the old pinion position
shims. Measure each shim separately and add together
to get the total thickness of the original build-up.
NOTE: If old shims are bent or mutilated they should be
replaced.
If a new gear set is being used, notice the (+), (–) or
"0" etching on both the old and the new pinions, and
adjust the thickness of the shims to compensate for the
difference of these two figures (as shown in table on
next page).
For example, if the old pinion is etched +2, and the new
pinion is –2, subtract .004 in. from the thickness of the
original shims used to position the pinion.
If either or both the pinions are etched beyond the
values on this chart, follow the same procedure to
establish correct pinion position.
For example if the old pinion is etched –12 and the new
pinion is etched +9, add .021 inch to the thickness of
the original shims.
After determining the new total build up of pinion
position shims, round the figure off to the nearest
multiple of .005 inch.
Use the Pinion Setting Chart on the next page as a
guideline to set the pinion.