120M Series 2 and 120M2 Motor Graders Machine Systems Caterpillar

Installation Procedure

1. If necessary, install the circle drive. Refer to Disassembly and Assembly, "Circle Drive - Install".
   Show/hide table

   Illustration 1	g01403436

2. Install adapter (21) to drawbar (1). Install ball (20) and bolts (19) to drawbar (1). Tighten bolts (19) to a torque of 500 ± 65 N·m (369 ± 48 lb ft).

3. Install shims (18) and adapter (17). Adjust shims (18) to obtain an end play of 0.60 ± 0.20 mm (0.020 ± 0.008 inch).

4. Install bolts (22).
   Show/hide table

   Illustration 2	g02731800

5. Attach a suitable lifting device to drawbar (1). Install drawbar (1). The weight of drawbar (1) is approximately 907 kg (2000 lb).

6. Install bolts (16).
   Show/hide table

   Illustration 3	g01403404

7. Install shoe (14). Repeat for the remaining shoes.

8. Install bolts (13).

   Note: Note the number of shims (15) and the location of shoes (14).

9. Tighten set screw (12).

10. Tighten nut (11).
    Show/hide table

    Illustration 4	g02731796

11. Extend the blade lift cylinders.

12. Install cap (9) and the shims. Install bolts (10). Repeat this step for the opposite side of the machine.

    Note: Note the number of shims.

13. Install centershift cylinder (8). Refer to Disassembly and Assembly, "Centershift Cylinder - Remove and Install".
    Show/hide table

    Illustration 5	g01403317

14. Install clamps (4) that connect hose assemblies (6) to the drawbar.

15. Attach Tooling (B) and a suitable lifting device to swivel (3). The weight of swivel (3) is approximately 41 kg (90 lb).

16. Position swivel (3) and install bolts (7). Remove Tooling (B) and the suitable lifting device.

17. Connect hose assemblies (6), (5), and (2).
    Show/hide table

    Illustration 6	g06287257

18. Position drawbar (1) to the original location. Remove the suitable cribbing and Tooling (A). Refer toTool Operating Manual, NEHS1303, "Lift Group (Stand - 25 Ton)" for more information on Tooling (A).
    Show/hide table

    Illustration 7	g01403782

    Show/hide table

    Illustration 8	g01403791

19. Stop the engine. Measure Dimension (A) between wear strip (25) and circle (23). Dimension (A) must be no greater than 0.50 mm (0.020 inch). Add or remove shims (24) to obtain the correct dimension.

20. Loosen bolts (13) to allow movement in shoes (14). Seat circle drive pinion (26) in the teeth on circle (23). Move circle (23) to obtain Dimension (C). Dimension (C) must be 50.00 + 2.50 − 0.50 mm (2.000 + 0.098 − 0.020 inch).

21. Loosen nuts (11). Evenly adjust setscrews (12) against shoes (14) to bring shoes (14) in contact with circle (23). Back off setscrews (12) to obtain Dimension (B). Dimension (B) must be no greater than 0.80 mm (0.032 inch).

22. Tighten bolts (13) to a torque of 530 ± 70 N·m (391 ± 52 lb ft). Tighten nuts (11) to a torque of 200 ± 30 N·m (148 ± 22 lb ft).

23. Start the engine and run the engine. Rotate the circle through the entire working range and check for binding. The circle must rotate freely.