623F Wheel Tractor-Scraper Machine Systems Caterpillar

Removal Procedure

Start By:

1. Remove the air cleaner. Refer to the Engine Supplement Disassembly and Assembly, "Air Cleaner - Remove and Install".
2. Remove the cushion-hitch accumulator. Refer to Disassembly and Assembly, "Accumulator (Cushion-Hitch) - Remove".
3. Separate the tractor and the scraper. Refer to Disassembly and Assembly, "Tractor and Scraper - Separate".
4. Remove the servo steering cylinder. Refer to Disassembly and Assembly, "Servo Steering Cylinder - Remove and Install" for the appropriate removal procedure.

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NOTICE
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates.

1. Put identification marks on all lines, hoses, wires, and tubes for installation purposes. Plug all lines, hoses and tubes. This helps prevent fluid loss and contamination of the oil system.

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Illustration 1	g00535061

2. Make sure that Tooling (A) is securely placed between the cushion-hitch and the frame before you begin the disassembly procedure.

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Illustration 2	g01076484

3. Remove bolts (1) and clamps (3) from bracket (2). Reposition hose assemblies (4) away from bracket (2). Remove bolt (7) and clamp (5). Reposition harness assembly (6) away from bracket (2) .

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Illustration 3	g01076486

4. Disconnect hose assembly (10) from tube assembly (11). Remove bolts (9) that secure brackets (2) and (8). Remove brackets (2) and (8) .

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Illustration 4	g01076746

5. Disconnect hose assembly (12) from tube assembly (13) .

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Illustration 5	g01076748

6. Disconnect hose assemblies (15) from tube assemblies (14). Reposition hose assemblies (15) away from the cushion-hitch.

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Illustration 6	g01076752

7. Remove clamp (16). Remove bolt (17) (not shown) and clamps (18). Disconnect hose assemblies (19) from the lubrication manifold.

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Illustration 7	g01076755

8. Remove bolt (20) and the clip that secures tube assembly (21). Remove bolt (25) and the clamp that secures hose assemblies (22). Remove bolts (23) that secure tube assembly (11). Remove bolts (24) that secure junction block (26). Disconnect hose assembly (27) from tube assembly (28) .

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Illustration 8	g01076758

9. Remove bolts (29) and clamps (30). Reposition hose assemblies (31). Repeat the procedure for the other side.

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Illustration 9	g00534481

10. Remove bolt (32) and clips (33). Reposition clips (33) and the harness assembly away from the cushion-hitch.

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Illustration 10	g01076761

11. Remove bolt (39). Reposition clamp (38) and the harness assembly away from the cushion-hitch. Disconnect tube assemblies (36) from hose assemblies (37). Remove bolts (34) that secure bracket (35) to the cushion-hitch. Reposition bracket (35) away from the cushion-hitch.

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Illustration 11	g00534679

12. Remove harness assembly (40) from clip (41). Disconnect harness assembly (40) .

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Illustration 12	g01076763

13. Disconnect hose assembly (47) from tube assembly (42). Disconnect hose assemblies (48) from tube assemblies (43). Remove bolts (44) that secure clamp (45). Remove clamp (45). Remove bolt (46) and the clip that secures hose assembly (49). Disconnect hose assembly (49). Disconnect hose assembly (50) from tube assembly (51) .

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Illustration 13	g01076765

14. Remove bolts (54) and disconnect hose assembly (55) from load cylinder (52). Disconnect hose assembly (53) from load cylinder (52) .

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Illustration 14	g01076766

15. Remove bolt (60) from tube assembly (42). Disconnect tube assembly (42) from adapter (62). Remove bolt (61) and the clip that secures tube assembly (51). Remove cotter pin (56) and pin (57) that secures spring (59). Remove bolts (58) and spring (59) .

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Illustration 15	g01076767

16. Remove bolts (65) and clamps (66) that secure tube assembly (13). Attach a suitable lifting device onto leveling valve (64). Remove bolts (63) that secure leveling valve (64). Remove leveling valve (64) from the cushion-hitch. The weight of leveling valve (64) is approximately 77 kg (170 lb). Remove bolts (67) and clamps (68) .

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Illustration 16	g01076770

17. Disconnect tube assembly (21) from adapter (69). Disconnect tube assemblies (71) from adapters (70). Disconnect the opposite end of tube assemblies (71). Remove tube assemblies (71) from the machine.

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Illustration 17	g01076771

18. Remove bolts (73) (not shown) and clamp (74) (not shown) from tube assemblies (72) .

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Illustration 18	g00534725

19. Remove bolts (75) that secure bracket (76). Remove bracket (76) and the tube assemblies as a unit.

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Illustration 19	g00534726

20. Remove bolts (77) that secure bracket (78). Reposition bracket (78) .

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Illustration 20	g00534727

21. Attach a suitable lifting device onto the cushion-hitch, as shown. Raise the cushion-hitch in order to release the pressure on the cushion-hitch pins.

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Illustration 21	g00535021

22. Remove bolts (79) that secure retainer (80) to the cushion-hitch pin. Remove retainer (80) from the cushion-hitch pin. Repeat the procedure for the other end of the cushion-hitch pin. Remove the cushion-hitch pin from the cushion-hitch.

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Illustration 22	g01076775

23. Remove cotter pin (83) from pin (85). Remove pin (85) from nut (82). Use Tooling (B) to remove nut (82) from pin (84). Remove bolts (81) that secure the retainer to the cushion-hitch. Remove the retainer from the cushion-hitch. Repeat the procedure for the other bolts and the other retainer on the cushion-hitch.

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Illustration 23	g01078630

24. Use Tooling (C) to remove the cushion-hitch pin. Remove cushion-hitch (86) from the machine. The weight of cushion-hitch (86) is approximately 1588 kg (3500 lb).