623F Wheel Tractor-Scraper Machine Systems Caterpillar

Separation Procedure

1. Park the machine on a hard, level surface. Lower the scraper bowl to the ground. Chock the wheels in order to prevent the machine from moving.

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At operating temperature the implement hydraulic oil tank is hot and under pressure. Hot oil can cause burns. To prevent possible injury, release the pressure in the implement hydraulic system before hydraulic lines or components are disconnected or removed.

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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 machine. 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 in Caterpillar machines. Dispose of all fluids according to local regulations and mandates.

2. 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	g00531698

3. Place suitable cribbing between the draft frame and the scraper bowl, as shown. Use Tooling (A) to raise the scraper bowl until the cribbing contacts the draft frame. Make sure that the cribbing is properly seated between the draft frame and the scraper bowl.

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Illustration 2	g00531656

4. Disconnect six hose assemblies (1) and the O-ring seals from the cushion-hitch and from the draft frame.

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Illustration 3	g00531700

5. Remove bolt (2) , the washer and the clip that secures two wiring harnesses (3) to the draft frame.

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Illustration 4	g00531697

6. Disconnect two wiring harnesses (3) from the draft frame.

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Illustration 5	g00531701

7. Remove eight bolts (4) , the washers and four half flanges that secure two hose assemblies (5) to tube assemblies (6) . Disconnect two hose assemblies (5) and the O-ring seals from tube assemblies (6) .

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Illustration 6	g00531703

8. Disconnect eight hose assemblies (7) and the O-ring seals from the draft frame.

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Illustration 7	g00531706

9. Remove two bolts (8) , the washers and the clips that secure two hose assemblies (5) to bracket (9) . Remove bolt (10) , the washer and the clip that secures two wiring harnesses (3) to bracket (9) .

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Illustration 8	g00531707

10. Remove two bolts (11) and the washers that secure bracket (12) to the draft frame. Move bracket (12) , the wiring harnesses and the hose assemblies away from the draft frame.

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Illustration 9	g00531709

11. Remove two bolts (13) and the washers that secure plate (14) to the steering links and the steering cylinder. Remove plate (14) from the steering links and the steering cylinder. Repeat the procedure for the other side.

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Illustration 10	g00531710

12. Disconnect lubrication line (15) from the steering cylinder. Use Tooling (B) to remove pin (16) from the steering links and the steering cylinder. Repeat the procedure for the other side.

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Illustration 11	g00531711

13. Separate the steering cylinder and the steering links. Place suitable cribbing between the steering link and the steering cylinder, as shown. Repeat the procedure for the other side.

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Illustration 12	g00531713

14. Install Tooling (C) between the cushion-hitch and the frame, as shown. Make sure that Tooling (C) is securely placed between the cushion-hitch and the frame. Repeat the procedure for the other side.

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Illustration 13	g00533553

15. Place Tooling (D) and a lift truck under the front of the scraper, as shown.

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Illustration 14	g00533554

16. Remove two bolts (17) and the washers that secure plate (18) to the hitch pin. Remove plate (18) from the hitch pin.

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Illustration 15	g00533555

17. Use a hammer and a brass rod to remove hitch pin (19) from the cushion-hitch and the draft frame.

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Illustration 16	g00533557

18. Remove two bolts (20) and the washer that secures plate (21) to hitch pin (22) . Remove plate (21) from hitch pin (22) . Use a hammer and a brass rod to remove hitch pin (22) from the cushion-hitch and the draft frame.

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Illustration 17	g00533558

Note: The bottom washer will drop when the tractor and the scraper are separated.

19. Separate the tractor and the scraper. Remove four washers (23) from the cushion-hitch.