Instructions for the Replacement of the Mounting Bar for the Steer Cylinders{7050, 7051} Caterpillar

Paving Compactor:

CP-323C (S/N: 6DM1-UP)

CS-323C (S/N: 1EN1-UP)

Introduction

The Special Instruction contains information that is required to replace the Mounting Bar for the Steer Cylinders.

Reference: Reference D & A Manual, KENR2783 for information on the disassembly of the machine systems.

Note: All welding must be performed by a certified welder.

Rework Procedure

1. Remove the bolts that secure the platform for the operator. Tilt the platform forward. Lock the platform in the raised position.

2. If the machine is equipped with enclosure covers for the engine, remove the lower side covers.

3. Drain the hydraulic tank.

Show/hide table



Illustration 1	g00818948

4. Remove the hose that is connected to the bottom of vibratory valve (A) .

5. Remove the four bolts that attach vibratory valve (B) and disconnect the electrical connector. Cap the hoses that are exposed and the ports that are exposed. Move the valve to the side.

6. Disconnect hoses (C) at the split flange connections. Cap the hoses and cap the ports. Move the hoses to the side.

7. Cut the ties that secure harness (D) along the left side of the frame in the area of the crossbar for the steering.

8. Drain the fuel tank.

9. Disconnect the fuel hoses from the fuel tank. Disconnect the wires for the sending unit from the fuel tank.

10. Remove the fill tube assembly for the fuel tank.

11. Attach an overhead hoist to the lifting brackets on the fuel tank in order to support the fuel tank. You can also use a floor jack to support the fuel tank.

12. Disconnect the two straps that secure the fuel tank to the frame. Lower the fuel tank from the machine.

13. Raise the rear end of the machine. Remove the fuel tank that is under the machine.

14. Disconnect the hydraulic hoses from the steer cylinders. Cap the hoses.

15. Remove the steer cylinders.

Show/hide table



Illustration 2	g00820686

16. Remove two of the mounting bolts for the ROPS from holes (D). Remove the two bolts for easier access in order to remove the old steering bar. Remove the two bolts for easier access in order to weld the new steering bar.

17. Remove the tie-wraps that secure the wiring harness to the existing steering bar. Remove the clamps that secure the hydraulic hoses to the existing steering bar.

18. Remove the welds that attach the existing steering bar to the ROPS plate. Remove the bar.

19. Remove any grease or paint from the area before the new bar will be welded in. Reference the instructions for the repair of the ROPS that are in SEHS6929.

Show/hide table



Illustration 3	g00820569

20. Attach link (2) and plate (3) to the top of bar (1). Use the dimensions in illustration 3.

21. Install bearings (7) in the bores on the new bar.

22. Weld the new bar (1) at the location that is shown in illustration 2. Reference illustration 4 for the size of the weld and for the placement of the weld. Reference the instructions for the repair of the ROPS in SEHS6929. A 6 mm fillet weld with 1.5 mm penetration around the part is required. Mild steel is used in both pieces to be welded. Both pieces have a 0.30% maximum carbon content. Both pieces have 0.46 maximum carbon equivalent value. A low hydrogen process is recommended. (Non Hardenable). You must use a process and a filler metal with the capability of medium penetration to obtain 1.5 mm penetration.

    Note: If a gap exists between the end of the bar and the plate for the ROPS, increase the size of the weld by the size of the gap. If the gap is larger than 5 mm, you should use a turnbuckle to close the gap before you weld.

Show/hide table



Illustration 4	g00820699

23. Clean the bar and paint the bar after the welding has been completed.

Show/hide table



Illustration 5	g00820732

24. Drill two holes in the front plate of the frame. The dimensions are shown in illustration 5. The diameter of the holes should be from 12.44 mm (0.49 inch) to 12.95 mm (0.50 inch).

Show/hide table



Illustration 6	g00820735

25. Assemble the two connectors, seals (4) and fittings (5) in the holes that are drilled in step 25.

26. Use pins (8) to attach the steer cylinders to the bar. Use the existing hardware to secure the pins.

27. Use the existing pins and the existing hardware to connect the rod end of the steer cylinders to the pivot housing.

28. Connect the hydraulic hoses to the steer cylinders.

29. Install the connectors and install seals (4) in pins (8) .

30. Attach hoses (6) between connectors (4) .

31. Use a grease gun on fitting (5) in order to fill the hoses. Use a grease gun on fitting (5) in order to fill the bearings. Fill the hoses with grease until the grease is visible around the pins. Fill the hoses with grease until the grease is visible around the bearings.

32. Assemble the remaining components in the opposite order of disassembly.