WHEEL AS 3122232 - Caterpillar

2. Remove reaction plate (1). 3. Remove three springs (2), sun gear (3) and friction disc (4).
Brake piston (5) must be removed from the intermediate brake housing assembly with shop air pressure. The brake piston can come out of the intermediate housing assembly with force during the removal procedure. To prevent possible personal injury, the brake piston must be retained in the intermediate housing assembly when applying shop air pressure.
4. While retaining the brake piston, apply shop air pressure (free of water) of approximately 525 kPa (75 psi) to fitting (Y). Brake piston (5) will move up and out of the intermediate housing assembly. 5. Remove seal (6) and seal assembly (7) with the back-up ring. The following steps are for the installation of the brake group. Lubricate all seals with SAE 30 oil.6. Install seal (6) and seal assembly (7) with the back-up ring. Seal assembly (7) consists of an L-shaped seal and a back-up ring. Put the L-shaped seal with the flat side towards the differential. Put the back-up ring in position away from the differential. 7. Install piston (5) in the intermediate housing assembly.
The continued use of friction disc with 7.65 mm (.301 in) or less of friction material (depth of oil groove) will result in accelerated wear. Do not use the disc color as an indication for wear. The overall thickness and groove depth are more important.
8. Inspect friction disc (4) for wear. Replace the friction disc if the friction material thickness is 7.65 mm (.301 in) or less. Immerse the friction disc in clean SAE 30 oil. Install friction disc (4), sun gear (3) and three springs (2). 9. Install reaction plate (1).10. Install the axle shaft assembly. See "Disassemble & Assemble Axle Shaft Assemblies" in this module.End By:a. install rear axle housing group (oscillating)b. install front axle housing group (fixed)