587R Pipelayer Machine Systems Main Control Valve - Assemble Caterpillar

Assembly Procedure

Note: Cleanliness is an important factor. Before assembly, all parts should be thoroughly cleaned in cleaning fluid. Allow the parts to air dry. Wiping cloths or rags should not be used to dry parts. Lint may be deposited on the parts which may cause later trouble. Inspect all parts. If any parts are worn or damaged, use new parts for replacement.

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Illustration 1	g01244123

1. Install O-ring seal (54), O-ring seal (53), and backup ring (52) to check valve (44). Note the orientation of piston (45) for installation purposes.

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Illustration 2	g01244122

2. Install O-ring seal (51), O-ring seal (50), and backup ring (49) to check valve (43) .

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Illustration 3	g01244121

3. Install O-ring seal (48), O-ring seals (47), and backup rings (46) to boom brake release valve (41) .

4. Repeat Step 3 for hook brake release valve (42). Refer to Illustration 4.

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Illustration 4	g01393491

5. Install piston (45), check valve (44), and check valve (43). Tighten check valves (43) and (44) to a torque of 31 ± 3 N·m (23 ± 2 lb ft).

6. Install boom brake release valve (41) and hook brake release valve (42). Tighten boom brake release valve (41) and hook brake release valve to a torque of 31 ± 3 N·m (23 ± 2 lb ft).

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Illustration 5	g01244118

7. Install O-ring seal (40), O-ring seals (39), and backup rings (38) to boom interlock valve (8) .

8. Repeat Step 7 for hook interlock valve (10). Refer to Illustration 12.

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Illustration 6	g01244117

9. Install O-ring seal (37), O-ring seals (36), and backup rings (35) to shuttle valve (7) .

10. Repeat Step 9 for shuttle valve (9). Refer to Illustration 12.

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Illustration 7	g01244115

11. Install coil assembly (33), nut (34), O-ring seal (32), O-ring seals (31), and backup rings (30) to boom kickout valve (6). Tighten nut (34) to a torque of 5.3 ± 1.5 N·m (47 ± 13 lb in).

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Illustration 8	g01244113

12. Install coil assembly (28), nut (29), O-ring seal (27), screen (26), O-ring seal (25), and backup ring (24) to pilot shutoff valve (4). Tighten nut (29) to a torque of 5.3 ± 1.5 N·m (47 ± 13 lb in).

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Illustration 9	g01244112

13. Install O-ring seal (23), backup ring (22), and O-ring seal (21) to pilot relief valve (3) .

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Illustration 10	g01244110

14. Install coil assembly (19), nut (20), O-ring seal (18), O-ring seals (17), and backup rings (16) to dead engine hook lowering valve (2). Tighten nut (20) to a torque of 5.3 ± 1.5 N·m (47 ± 13 lb in).

15. Repeat Step 14 for dead engine boom lowering valve (5). Refer to Illustration 12.

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Illustration 11	g01244109

16. Install coil assembly (14), nut (15), O-ring seal (13), O-ring seal (12), and backup ring (11) to charging valve (1). Tighten nut (15) to a torque of 5.3 ± 1.5 N·m (47 ± 13 lb in).

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Illustration 12	g01393481

17. Install boom interlock valve (8) and hook interlock valve (10). Tighten boom interlock valve (8) and hook interlock valve (10) to a torque of 31 ± 3 N·m (23 ± 2 lb ft).

18. Install shuttle valves (7) and (9). Tighten shuttle valves (7) and (9) to a torque of 24 ± 3 N·m (18 ± 2 lb ft).

19. Install boom kickout valve (6), dead engine boom lowering valve (5), and dead engine hook lowering valve (2). Tighten boom kickout valve (6), dead engine boom lowering valve (5), and dead engine hook lowering valve (2) to a torque of 24 ± 3 N·m (18 ± 2 lb ft).

20. Install pilot shutoff valve (4), pilot relief valve (3), and charging valve (1). Tighten pilot shutoff valve (4), pilot relief valve (3), and charging valve (1) to a torque of 31 ± 3 N·m (23 ± 2 lb ft).

End By: Install the main control valve. Refer to Disassembly and Assembly, "Main Control Valve - Install".