Taylor-Dunn B0-T48-48 Taylor Truck T48, Operation, T Roubleshooting And Replacement Parts Manual

Page: 87 / 242

Maintenance, Service, and Repair
Transmission
Page 11
Pinion Bearing Preload
NOTE: The pinion gear depth must be set before the
preload. Refer to
Setting the Pinion Gear
Depth
.
1. Install the pinion gear, spacer, and shims into the
housing.
2. Install the outer pinion bearing.
3. Install the main gear onto the pinion shaft and
torque the pinion nut to 154-169 ft lbs.
4. Measure the torque required to rotate the pinion
shaft in the housing.
5. The torque required to rotate the pinion shaft
should be between 1.1 and 2.9 ft-lbs. If the torque
is not within specifications then add or subtract
from the total shim thickness and repeat this
procedure until the proper preload is obtained.
NOTE: Add shims to decrease torque.
PINION GEAR SHIMMING
INSTRUCTIONS
NOTE: This procedure is required only when replacing
the front or rear pinion bearings and races or
the ring and pinion gears.
NOTE: To perform this procedure, all parts must be
clean and the bearings lightly lubricated.
Refer to the illustrations on the following pages.
Setting the Pinion Gear Depth
This formula is used to calculate the amount of shims
that are required:
C - B - A + (DV) = Pinion Shim (mm)
where,
DV = The number on the face of the pinion gear
(Figure 1).
A = The distance in millimeters from the face of
the pinion gear to the top of the inner pinion
bearing race (Figuer 2).
B = 54.
C = The number on the edge of the differential
side plate closest to the input shaft (Figure 3).
D = The number on the edge of the differential
side plate farthest from the input shaft (Figure
3).
E = The distance in millimeters from the rear of
the drive housing to the face of the pinion gear
(Figure 4).
Once a shim has been selected and the pinion gear is
installed, confirm that:
E - D = B + (DV)