GEAR-OIL DRIVE 1556637 - Caterpillar

1. Disconnect two tube assemblies (3) and hose assembly (11) from master cylinder (2).2. Remove three bolts (1) and master cylinder (2) from the master cylinder booster (6). 3. Remove three bolts (4) and the washers, and remove plate (5) from the support assembly. 4. Disconnect two hoses (7) and tube assembly (10) from master cylinder booster (6). 5. Remove the nut and bolt (9) that connects master cylinder booster (6) to the lever.6. Remove four bolts (8), and remove master cylinder booster (6) from the support assembly. The following steps are for the installation of the brake master cylinder and the master cylinder booster.7. Check the condition of all O-ring seals. If any of the seals are worn or damaged, use new parts for replacement.8. Put master cylinder booster (6) in position on the support assembly, and install four bolts (8).9. Install bolt (9) and the nut that connects master cylinder booster (6) to the lever.10. Position plate (5) on the support assembly, and install three bolts (4).11. Connect hose assemblies (7) and tube assembly (10) to master cylinder booster (6).12. Put master cylinder (2) in position on the master cylinder booster, and install three bolts (1).13. Connect tube assemblies (3) and hose assembly (11) to master cylinder (2).14. Remove the air from the brake system. See the topic, "Remove Air From The Brake System (Bleed The Brakes)", in the Undercarriage, Steering and Brakes Testing & Adjusting Manual.