Spicer Tandem Drive Axles Service Manual D__R440, 460, 480, D_R461, 462, 463, 521, 581, 601, 651, 652, 653 - Manual (Page 65)

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Drive Pinion
Drive Pinion
2. With the bearings well lubricated, place the assembly
in the press. Position sleeve so that load is applied di-
rectly to the backface of the outer bearing cone.
3. Rotate pinion cage while applying press load (see
chart below) to the assembly and check rolling
torque. Wrap soft wire around the bearing cage, at-
tach spring scale and pull. Preload is correct when
torque required to rotate the pinion bearing cage is
from 3–7 lbs. (2–3 kgs.).
Specifications for Pinion Bearing Trial Buildup Preload Test
Torque to Rotate Bearing Cage (w/o pinion seal)
10–20 lbs. in. (1.1–2.3 N•m)
Read only the torque value after the bearing cage starts to
rotate.
4. If necessary, adjust pinion bearing preload by chang-
ing the pinion bearing spacer. A thicker spacer will
decrease preload. A thinner spacer will increase pre-
load.
Once correct bearing preload has been established, note the
spacer size used. Select a spacer 0.001” larger for use in
the final pinion bearing case assembly. The larger spacer
compensates for slight “growth” in the bearings which oc-
curs when they are pressed on the pinion shank.
Do not assume that all assemblies will retain proper pre-
load once bearing are pressed on pinion shank. FINAL PRE-
LOAD TEST MUST BE MADE IN EVERY CASE.
1 - Press ram
2 - Sleeve must apply pressure to back face of outer bearing
cone
3 - Spring scale
3
1
2
Forward Axles and Rear Axles
Spring Scale Reading 3 - 7 lbs.
(2 - 3 Kgs.)
Press Loads 18.5 - 19.5 tons
(16.8 - 17.7 metric tons)
Nominal Bearing Thickness
spacer 0.185”
(4.699 mm)
CAUTION
IMPORTANT