Spicer Tandem Drive Axle Dual Range & Double Planetary 34,000-45,000 lbs - Manual (Page 73)

Service Bulletin Supplement.
Input Shaft End Play for Axle Models equipped with an Input Shaft Axial Spring
and Thrust Button.
In September 1988, Spicer added an Axial
Spring and Thrust Button between the input
and output shafts. The addition of these parts
reduces shaft end play movement by loading
the shafts axially in the direction of the yoke.
End play tolerances are the same for axles
with or without the new Spring and Thrust
Button. However, end play measurement
procedure is different as described below.
Measure and Adjust Input Shaft End
Play.
NOTE:
The addition of the Spring and
Thrust Button between the input and output
shafts necessitates the fabrication of a “U”
bracket to assist in measuring the shaft end
play. Proceed as follows:
1.
Fabricate a “U” bracket from 1“ flat stock
(minimum thickness 0.125”) as specified in
the illustration.
2. If axle is disassembled,
build up a 0.045”
(0.024 mm) thick shim pack and place shim
pack and bearing cover on power divider
cover. Then proceed with Step 3.
If axle is assembled,
remove input shaft
nut, flat washer and yoke. (NOTE: Axles
built with metric threaded nuts do not use
flat washers.) Then proceed with Step 3.
I
Location of Axial Spring and Thrust Button.
Input Shaft End Play Chart
New or Rebuild with new
NOTE:
Because of manufac-
parts 0.003” to 0.007” turing variations in individual
parts, correctly adjusted end
Rebuild with reused parts play could vary 0.010,” after
0.013" to 0.017" the unit is rotated.
Acceptable End Play Tolerances when measuring as a
regular maintenance procedure with axle in truck.
Up to 0.060” with over NOTE:
If end play exceeds
100,000 miles or 1 year limits, disassemble power
service off-road. divider and replace worn
parts.
Up to 0.040” with less than
100,000 miles or 1 year
service on-road.
“U” Bracket Specifications.
NOTE 1:
Bushing no longer used in current production axles, see pages 37 & 38.
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