TM 9-2320-266-34
(5) To select a shim pack, read the markings on the
(6) If the marking is negative, add the correct amount
end of the pinion head as shown in figure 19-18. One num-
of shims. If the marking is positive, subtract the correct
ber is found on both the drive pinion and the ring, which
amount of shims. Shims are available in 0.003, 0.005, and
indicates a matched gear set. Directly opposite this number
0.010 inch thicknesses.
will be one with a "+" or "-" before it, or the number will
(7) Remove the tool and adapters from the axle
be "0." This number must be positively identified before
housing.
continuing the assembly procedure. Midway between the
(8) Remove the rear pinion bearing cup and install the
two sets of numbers described above are numbers and let-
correct shim pack.
ters which are etched for manufacturing purposes only. But
as one of these numbers may be "0," it might be confused
(9) Reinstall the rear bearing cup as described in a,
with the number needed for the assembly procedure. A rule
above.
to follow would be to first examine the shaft end for a
(10) Lubricate the cone, and install it on the pinion
positive or negative number. If a positive or negative num-
shaft using tool C-3095-A. Refer to figure 19-19.
ber is not etched on the pinion head, then the number will
be zero (see table 19-1).
Figure 19-18. Drive Pinion Markings.
Figure 19-19. Installing the Rear Pinion Bearing Cone.
Table 19-1. Pinion Setting Chart
New Pinion Marking
Old
Pinion
+1
+3
+4
4
Marking
-3
-2
0
-1
+0.001
+4
+0.007
+0.008
+0.004
+0.006
0
+0.002
+0.005
+0.003
+3
+0.003
0
+0.002
+0.006
-0.001
+0.005
+0.007
+0.001
+0.004
+2
+0.004
-0.001
+0.005
-0.002
+0.006
+0.001
+0.002
+0.003
0
+1
+0.002
0
-0.002
+0.004
-0.003
+0.005
+0.003
+0.001
-0.001
+0.004
0
-0.004
-0.002
-0.003
+0.003
+0.002
+0.001
-0.001
0
-1
-0.005
+0.001
-0.004
0
-0.001
-0.002
-0.003
+0.002
+0.003
-2
+0.002
-0.006
+0.001
0
-0.005
-0.003
-0.001
-0.002
-0.004
-0.007
-3
+0.001
-0003
-0.006
-0.005
0
-0.001
-0.002
-0.004
4
-0.008
0
-0.001
-0.002
-0.003
-0.004
-0.007
-0.006
-0.005
Change 1
19-7
