SHIM 1400190 - Caterpillar

1. Remove switch (1) from the brake control valve. 2. Remove cover (2). 3. Remove inlet and exhaust valve (3). 4. Put spring (6) under compression so retainer (7) is away from snap ring (8). Use tool (A) to remove snap ring (8). Remove retainer (7), spring (6) and retainer (5) from valve (4).5. Check the condition of the O-ring seal in the bore of retainer (7) and on the outside diameter. If the O-ring seals are damaged, a replacement of inlet and exhaust valve will be necessary. 6. Remove the four bolts and make a separation of cover (10) and valve body (9). 7. Remove O-ring seal (11) from cover (10). Check O-ring seal (11) for damage and make a replacement if necessary. 8. Use a screwdriver to hold the stem in position. Remove locknut (12). 9. Remove spring guide (13), spring (14), relay piston (16) and spring (15) from the valve body. 10. Remove stem (19) and two O-ring seals (17) and (18) from relay piston (16). Check O-ring seals (17) and (18) for damage and make a replacement if necessary.
Retainer (21) holds a spring under compression. To prevent personal injury, use the following procedure to remove the retainer.
11. Push down and hold primary piston (20). Use a screwdriver to pull retainer (21) away from the edge of the valve body. Slowly release the compression of the spring under primary piston (20). 12. Remove retainer (21), primary piston (20) and spring (22) from the valve body. 13. Remove spring nut (26) from primary piston (22). Remove spring seat (25) rubber spring (24) and O-ring seal (23) from the primary piston.14. Check the condition of O-ring seal (23) and make a replacement if necessary. 15. Use tool (B) to remove snap ring (27). Remove inlet and exhaust valve assembly (28) from the valve body. 16. Push retainer (33) away from snap ring (35). Use tool (A) to remove snap ring (35). Remove retainer (33), spring (31) and retainer (30) from valve (29).17. Remove O-ring seals (32) and (34) from retainer (33). Check O-ring seals (32), (34) and the rubber seal on valve (29) for damage. If any of these three components are damaged, it will be necessary to make a replacement of the inlet and exhaust valve assembly. 18. Remove vent filter (36) and make a replacement if necessary.Assemble Brake Control Valve
1. Put vent filter (1) in position in the valve body. 2. Put Loctite LB 8632 Silicone Lubricant (North America), Loctite LB 8104 Silicone Lubricant (EAME), Loctite LB 8801 Silicone Lubricant (Asia Pacific Division), or Loctite LB Superlube (South America) on O-ring seals (5), (7) and on the rubber end of valve (2). Install retainer (3) on the valve so the counterbore in the retainer is away from spring (4).3. Install O-ring seals (5) and (7) on retainer (6). Install spring (4) and retainer (6) on valve (2). Compress spring (4) and use tool (A) to install snap ring (8) on the end of valve (2).