FILLER GP-POWER TRAIN OIL 8Y7483 - Caterpillar

Do not disconnect any air lines until the air pressure is zero.
1. Drain the air from the air tanks. 2. Disconnect air hose assemblies (1) and (2) from the brake actuator. 3. Loosen screw (3). Loosen shaft (4) until the pin that holds the rod in the actuator to the slack adjuster can be removed.4. Remove the cotter pin and pin (5).5. Remove Nuts (7) that hold the brake actuator in position, and remove brake actuator (6). The following steps are for the installation of the brake actuator.6. Position brake actuator (6) on the bracket, and install the nuts that hold it. Tighten nuts (7) to a torque of 180 25 N m (135 18 lb.ft.).7. Connect air hose assemblies (1) and (2) to the brake actuator.8. Put the slack adjuster in position on the rod for the brake actuator, and install pin (5) and the cotter pin that holds it.9. Make an adjustment to the brakes. See the Topic, Adjustment of Brakes.Disassemble And Assemble Brake Actuator
Start By:a. remove brake actuator 1. Remove yoke (1), locknut (19), boot (3), and retainer (4). Remove clamp (12), plate (11), and diaphram (9).
Remove nut (2) very slowly to be certain all the pressure on the service brake spring is released.
2. Remove the locknut for nut (2). Remove nut (2) slowly to release pressure on service brake spring (7). Remove rod (10), retainer (15), spring (7) and the guide.
Be very careful when using tooling (A) to compress and release parking brake spring (6). Serious injury could result if care is not used during this process.
3. Install tooling (A) to compress parking brake spring (6) slightly. Remove eight bolts (23) (photo shows bolts removed). Slowly remove nut (22) slowly to release pressure on spring (6).4. Remove tooling (A). Remove spring (6). Remove seal and wiper (17) from piston (5). 5. Remove wiper (22) and seal (23) from the cylinder assembly (14). The following steps are for the assembly of the brake actuator.6. Clean and inspect all parts. Make a replacement of all parts that are worn or damaged.7. Install seal (23) and wiper (22) in the cylinder assembly (14).
Serious injury could result if tooling (A) is not used correctly and safely to compress parking brake spring (6).
8. Install seal and wiper (17) in piston (5). Install spring (6). Install tooling (A) to compress the parking brake spring.9. Slowly tighten nut (22) and compress parking brake spring (6). Install eight bolts (23) (photo shows bolts removed).10. Install the guide, spring (7), retainer (15) and rod (10).11. Install and tighten nut (2) to put pressure on the service brake spring (7). Tighten nut (2) until approximately 51.5 to 54.0 mm (2 1/16 to 2 1/8 in.) of rod (10) is out of the nut. Install the locknut on the rod above nut (2).12. Install diaphram (9), plate (11), and clamp. Install retainer, boot (3), locknut (19), and yoke (1).End By:a. install brake actuator