The PC variation number can be in
The bevel gear (12) and pinion must
1,000-ths of an in. or 100-ths of a
be replaced as a matched set.
mm. See the following examples:
PC + 3, PC -3, +3 or -3 = .003 in.
If no PC variation number is visible
PC +.03, PC -.03, +.03 or -.03 = .03 mm
perform the following step.
c. If old pinion (12) PC variation number is
h. Measure and record difference between
prefixed with "+", subtract the PC number
old pinion and new pinion (Dimension A)
from old shim pack thickness recorded in
add or subtract PC number from the
standard shim pack thickness.
d. If old pinion (12) PC variation number is
prefixed with "-", add the PC number to old
shim pack thickness recorded in step a.
5. INSTALL PINION (12) AND RETAINER (21).
The value calculated in step c or d is
the thickness of a standard shim
pack (i.e., without variation).
Install a minimum of three shims in a
e. Check and record PC variation of new
pack. If the pack is made up of
different thicknesses, install thinnest
shims on both sides of pack for
f. If new pinion (12) PC variation is prefixed
with a "+", add the PC number to standard
shim pack thickness.
a. Install correct shim pack (30). Insure oil
slots in shims (30) align with oil slots in
g. If new pinion (12) PC variation is prefixed
retainer (21) and housing (31).
with a "-", subtract the PC number from
the standard shim pack thickness.
Wear eye protection. Do not hit steel
The value calculated in steps f or g
parts with a hammer. Parts can break
will be the thickness of the new shim
and cause injury.
b. Install pinion (12) and retainer (21) into
housing (31). If required use rubber,
plastic or leather mallet.