R3000H Load Haul Dump Machine Systems Caterpillar

Disassembly Procedure

Start By:

1. Remove the brake accumulator charging valve. Refer to Disassembly and Assembly, "Accumulator Charging Valve (Brake) - Remove".

Note: Cleanliness is an important factor. Before the removal procedure, thoroughly clean the exterior of the component. Thoroughly cleaning the exterior of the component will help to prevent dirt from entering the internal mechanism. Precision components can be damaged by contaminants or by dirt. Perform disassembly procedures on a clean work surface. Keep components covered and protected at all times.

Note: Put identification marks on all of the components of the brake accumulator charging valve as the components are being removed. All of the components must be reinstalled to original locations and the original orientation.

Illustration 1	g03381102

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Sudden release of spring force can cause injury. To prevent the possibility of injury, follow the procedure to relieve the spring pressure.

1. Separate housing (7) and housing (31).

2. Before removing plug (2), Accurately measure the depth from the end of the housing and record for assembly purposes.

3. Remove plug (2). Remove O-ring seal (3) from plug (2).

4. Remove pin (1) from plug (2).

5. Remove spring (4), guide (5) and ball (6).

   Note: Measure the diameter of ball (6) for assembly purposes.

6. Remove plug (30) and spring (28), O-ring seal (29) from plug (30).

7. Remove guide (27), ball (26) and spool (25).

   Note: Measure the diameter of ball (26) for assembly purposes.

8. Remove insert (24), remove O-ring seals (22) and (23) from insert (24).
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   Sudden release of spring force can cause injury. To prevent the possibility of injury, follow the procedure to relieve the spring pressure.

9. Depress plug (39) and remove retaining ring (40) and plug (39).

10. Remove back-up ring (38) and O-ring seal (37) from plug (39).

11. Remove spring (36) and stop (35).

12. Remove spool (33).

    Note: Do not force spool (33) at any time during removal. Spool (33) can be guided out of housing (32) by accessing either of the large ports on the bottom of the valve.

13. Remove O-ring seal (34) from spool (33).

14. Only remove plug (19) if O-ring seal (21), or back-up ring (20) are in need of replacement.
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    Sudden release of spring force can cause injury. To prevent the possibility of injury, follow the procedure to relieve the spring pressure.

15. Loosen nut (17) and remove screw (16). Remove O-ring seal (15) from screw (16).

16. Remove spring (14), poppet (13), seat (12), O-ring seal (11), washer (10), filter (9) and washer (8).