HARNESS ASSEMBLY 1949380 - Caterpillar

Remove Brake Rotochamber
Before disconnection of any lines, lower all hydraulics to relieve pressure.
1. Disconnect air line (1). Remove two air lines on rotochamber equipped with a parking brake.2. Remove cotter pin and pin (3).3. Remove nuts (2) that hold the rotochamber to the bracket.4. Remove rotochamber (4).Install Brake Rotochamber
1. Put the rotochamber in position on the bracket and install the washers and nuts that hold it.2. Connect air line to rotochamber. Connect two air lines on rotochamber equipped with a parking brake. 3. Install pin (3) and cotter pin. Make a bend of the legs of the cotter pin.4. Operate engine until air reservoirs have normal air pressure.5. Make adjustment to the slack adjuster (2) so that rod (1) moves 1.62 in. (41.1 mm) when a brake application is made.Disassemble Brake Rotochamber
start by: a) remove rotochamber 1. Remove yoke (1), nut (2), boot (4), splash guard (3) and felt. 2. Install tool (A) on rotochamber.3. Before you can disassemble the rotochamber, the parking brake must be released. 4. Give the parking brake a constant supply of 80 psi (5.7 kg/cm2) air minimum to release it. This procedure may not always release the rollers. Put a small amount of shop air (approximately 40 psi (28 kg/cm2) into the service brake apply port (X) to release the rollers from the rod.5. Remove bolts (5) and washers. 6. Make a separation between housing (6) and body (8) using tool (A) until compression on spring (7) is released. Remove spring (7).7. Keep the air supply on the parking brake until rod (9) is free of housing (6). 8. Hold cap (10) in place and remove screws (11).9. Remove cap (10) slowly until compression on the spring under it is released.10. Remove spring and plastic washer. 11. Remove rollers (12).12. Turn