HOUSING AS-TANDEM DRIVE 1901690 - Caterpillar

Illustration 1 g03877614
Final Drive and Wheel
(1) Bolts
(2) Retainer
(3) Shims
(4) Hub
(5) Wheel bearings
(6) Wheel
(7) Spacer
(8) Spindle
Illustration 2 g03877639
Bolt Tightening Sequence
(2) Retainer
(9) Gauge holes This procedure requires a 0 to 50 mm (0 to 2 inch) outside micrometer and a depth micrometer that has 50 mm (2 inch) of travel.Note: The tire, the rim, and the brake components must be removed. The procedure that follows should be performed in the horizontal position, but the capability to rotate the wheel must be maintained.
Measure the thickness of retainer (2) with the outside micrometer. Measure the retainer at three places near the three small gauge holes (9). Record the average of these three measurements.
Place spindle (8) on a support. The support can be the floor.
Apply lubricant to wheel bearings (5). Assemble spacer (7), wheel bearings (5), and wheel (6) on spindle (8).
Install hub (4) and retainer (2) without shims (3). Lubricate the threads of ten bolts (1). Install ten bolts (1) in an equally spaced pattern.
Torque 10 bolts (1) to 250 15 N m (185 10 lb ft) in five equal steps of 50 5 N m (35 3 lb ft). Tighten the bolts in the sequence that is shown in Illustration 2.
Rotate the wheel by one revolution. Make sure that bolts (1) are tightened to 250 15 N m (185 10 lb ft).
Loosen ten bolts (1) so that the wheel can slide a slight amount downward on the wheel bearings.
Torque the 10 bolts (1) to 104 5 N m (75 4 lb ft) in five equal steps of 20 N m (15 lb ft). Tighten the bolts in the sequence that is shown in Illustration 2.
Rotate the wheel by one revolution. Make sure that bolts (1) are tightened to 104 5 N m (75 4 lb ft).
To measure the distance from the retainer to the end of the spindle, use the depth micrometer. Measure the distance through the 3 gauge holes (9) in the retainer.
Record the average of the three depth measurements. Subtract the average thickness of the retainer that was measured in Step 1 from the average depth that was measured in Step 10. The difference is the thickness of shims (3). The thickness of shims (3) must be within 0.025 mm (.0010 inch) of the difference.
Remove bolts (1), retainer (2), hub (4), and wheel (6). Assemble the brake components and the Duo-Cone seals on spindle (8). Make sure that all of the contact surfaces are clean and dry before installing the seals. Reference: For more information on installing Duo-Cone seals, refer to the Service Manual module Disassembly and Assembly, RENR2034, "Power Train", "Duo-Cone Conventional Seals - Install".
Install bolts (1), retainer (2), shims (3), hub (4), and wheel (6). Torque the 20 bolts to 460 70 N m (340 50 lb ft) and then turn each bolt by an additional 120 10 degrees.
The bolts should not be reused after the bolts have been tightened to the recommended torque and