Allis-Chalmers G - Differential, Final Drive & Rear Axle

ALLIS-CHALMERS Paragraphs 240-240A
DIFFERENTIAL FINAL DRIVE & REAR AXLE
DIFFERENTIAL
Models B-C-CA
Differential unit is of the two-pinion,
open case type, and is located back of
the dividing wall cast into the trans-
mission housing. Differential carrier
bearings are shim adjusted, tapered
12 38 35 TS RL 33 34 MS
roller type, mounted in carriers (35—
Fig. AC106), which are bolted to the
transmission housing. The carriers are
covered by their respective final drive
units (12), which must be removed
before any work can be done on the
carriers.
MS. Transmission
mainshaft
RL. Reverse idler gear
shaft lock plate
TS. Transmission
housing
3. Shaft oil seal
7. Final drive pinion
shaft
12. Final drive housing
26. Main drive bevel
ring gear
27. Differential pinion
gears shaft
28. Differential pinion
shaft lockpin
29. Differential case
31. Thrust washer
32. Differential side
gear
33. Differential pinion
34. Pinion gear thrust
washer
36. Bearing carrier
38, Bearing shims
ACT06—Models B, and C differential and bevel ring gear
assembly—rear view. Model CA is similar.
240. BEARINGS AND BACKLASH
ADJUSTMENT. Carrier bearings are
adjusted by varying the number and
thickness of shims (38) located under
the carriers. Although shim removal
can be accomplished without removing
the accessory (PTO) housing (bolted
to the rear face of the transmission),
or transmission housing rear cover,
there is no sure way of checking the
bearing adjustment or the pinion to
ring gear backlash without doing so.
To adjust bearings, first remove both
final drive assemblies as outlined in
paragraph 269 for B and C or 274 for
the CA. Remove the PTO and BP unit
(or the complete accessory unit of CA)
from rear face of transmission hous-
ing on models so equipped, or trans-
mission housing rear cover. On CA
models with continuous type PTO,
remove final drive clutch actuator
support (39—Fig, AC128) from right
side of transmission housing.
240A. Select shims (38—Fig. AC106)
between carriers and housing to re-
move all bearing play but permitting
differential to turn without binding.
Removing shims reduces bearing play.
Divide shims between left and right
carriers to provide .005-.014 backlash
between teeth of pinion and ring gear.
To increase backlash (after bearings
have been adjusted), remove shim or
MODEL CA
69