GEARS AND CASE
CAUTION
The splines of many Spicer clutching
gears, main shafts, etc., are equipped
with a machined relief called c "hopping
guard". With the clutch gear in the
engaged position, the mating gear is free
to slip into this notch, preventing the two
gears from "walking out of gear" under
load.
(See enlarged view.) This is not
a worn or chipped gear! Do not grind it
down or discard the gear.
A. Loose or caged needle roller bearings are used
left unfilled on all Dana/Spicer needle bearing
to carry the overdrive, underdrive and lo-lo gears (B-7, B-
applications. This will aid in preventing seizures by
12 & B-12a) on the mainshaft of the R8000 Series
allowing easier oil entry and free movement of the needle
auxiliaries.
bearings.
B. The individual gears, with sleeve and needle
D. To reassemble loose needle roller bearings (B-8
roller bearing sub-assemblies must be positioned in the
and B-14) the following steps are suggested. However, if
case and the mainshaft assembled through the rear
it is more convenient to assemble needle bearings to
bearing retainer bore.
inside of gears, rather than outside of sleeves, the
method is applicable.
C. Due to variations in tolerances and to provide
better bearing lubrication, Dana engineers recommend
If new parts are being installed, always check the
that loose needle bearings should not completely encircle
following to insure free and easy assembly and
the shaft. Space for approximately one needle should be
installation of mainshaft:
833
