Drive System Bench Service: Transfer Case Inspection - Cub Cadet 6X4 Shop Handbook

Chapter 2- Drive System: CVT and Transfer Case
DRIVE SYSTEM BENCH SERVICE:
TRANSFER CASE INSPECTION
1. Clean and inspect the case and all internal parts.
NOTE: Most of the inspection process is visual
or tactile. A limited amount of measurement is
necessary, mostly to confirm whether a part that
is usually worn is still serviceable.
1a. Clean all sealant from the mating surfaces
and clean all lubricant and dirt from the
internal and external surfaces.
CAUTION: If the cases are cleaned in solvent,
with the bearings in-place, all solvent must be
cleaned from the bearings. Pay particular atten-
tion to the blind bearings. Any solvent that
remains in the transfer case will dramatically cut
the viscosity of the new gear lube, shortening
the life of the freshly rebuilt transfer case.
1b. If the cases are cleaned using detergent
and water, with the bearings in-place,
completely dry the bearings and spray
them with a suitable lubricant such as Cub
Cadet Penetrating Oil (P/N: 737-3037) to
displace any remaining water.
1c. Check the housings for cracks, damage to
machined surfaces, stripped threads.
1d. Check the vent: it should pass air.
1e. Check the bearings for: See Figure 2.107.
Figure 2.107
• Rough rotation: rotate them, feel and listen
• Looseness: work the inner race and check for
play.
• Discoloration or obvious signs of damage.
Check bearing
in housing
46
2. Check the middle shaft gears:
Figure 2.108.
Dog teeth
(serrations)
Gear teeth
Figure 2.108
2a. The gear teeth are unlikely to be hurt
except in cases of extreme contamination,
corrosion or foreign object damage. In
any of these cases the transfer case is
likely unfeasible to repair.
2b. Check that the dog teeth on the shaft,
gear, and shift collar are not damaged.
NOTE: If the teeth are damaged the cause of
the damage must be corrected. Possible causes
include: operator abuse by shifting gears while
the vehicle is in motion, or shift linkage issues.
2c. The low forward and reverse gears on the
middle shaft both have bearing-material
inserts. Check the inserts for wear.
2d. Check the washers: See Figure 2.109.
.030" washers
Replace if worn to less
than .025" (.64mm).
Figure 2.109
See
Shift collar
Gear
Bearing material
inserts
Reverse Low range
gear (forward) gear