Procedure for Changing a Hydraulic Control Support That Has Three Bearings to a Hydraulic Control Support That Has Four Bearings{5258} Caterpillar

Landfill Compactor:

836H (S/N: BXD1-UP)

826G Series II (S/N: AYH1-UP)

826G (S/N: 7LN1-UP)

826H (S/N: AWF1-UP)

836G (S/N: BRL1-UP; 7MZ1-UP)

Wheel Loader:

988H (S/N: BXY1-UP)

950G Series II (S/N: AYB1-UP; AYD1-UP; AYL1-UP; AXR1-UP)

950G (S/N: 2JS1-UP; 4BS1-UP; 6NS1-UP)

950H (S/N: N1A1-UP; M1G1-UP; J5J1-UP; K5K1-UP)

962G Series II (S/N: BAB1-UP; AYE1-UP; AYG1-UP; AXS1-UP)

962G (S/N: 3BS1-UP; 5AS1-UP; 5RS1-UP)

962H (S/N: N4A1-UP; M3G1-UP; J6J1-UP; K6K1-UP)

966G Series II (S/N: AXJ1-UP; ANT1-UP; AWY1-UP; AWZ1-UP)

966G (S/N: AAH1-UP; 3ZS1-UP; 9RS1-UP)

966H (S/N: A6D1-UP; A6G1-UP; A6J1-UP)

972G Series II (S/N: AXC1-UP; AXE1-UP; AXN1-UP; ANY1-UP)

972G (S/N: 7LS1-UP; 8TS1-UP; AAW1-UP; 1EW1-UP)

972H (S/N: WLA1-UP; A7D1-UP; A7G1-UP; A7J1-UP)

980G Series II (S/N: AXG1-UP; AWH1-UP; AYT1-UP)

980G (S/N: 9CM1-UP; 2KR1-UP; 2SR1-UP)

980H (S/N: MHG1-UP; A8J1-UP; JMS1-UP)

988G (S/N: BNH1-UP; 2TW1-UP)

990 Series II (S/N: BCR1-UP; 4FR1-UP)

990 (S/N: 7HK1-UP)

990H (S/N: BWX1-UP)

992G (S/N: 7HR1-UP; AZX1-UP; ADZ1-UP)

994F (S/N: 4421-UP)

Soil Compactor:

825G Series II (S/N: AXB1-UP)

825G (S/N: 6RN1-UP)

825H (S/N: AZW1-UP)

Integrated Toolcarrier:

IT62H (S/N: M5G1-UP)

Wheel Dozer:

824G Series II (S/N: AWW1-UP)

824G (S/N: 4SN1-UP)

824H (S/N: ASX1-UP)

834G (S/N: BPC1-UP; 6GZ1-UP)

834H (S/N: BTX1-UP)

844 (S/N: BBN1-UP; 2KZ1-UP)

854G (S/N: AMP1-UP; A4W1-UP; 1JW1-UP)

Introduction

Note: This procedure will be similar for all machines that are listed in this instruction.

This Special Instruction provides the procedures and the requirements that are needed for replacing the hydraulic control support that has three bearings with the hydraulic control support that has four bearings. The hydraulic control support in the 988H Wheel Loader is not sturdy enough to prevent excessive vibrations. As a result, the hydraulic controls vibrate aggressively. The new four bearing design for the hydraulic control support eliminates much of the vibration.

Required Parts

Illustration 1	g01440147

Illustration 2	g01439945

Removal and Installation Procedure

Show/hide table



Illustration 3	g01439979

1. Remove the following components from the hydraulic control support: knob (5), screws (6), cup holder (7) and cover (8) .

Show/hide table



Illustration 4	g01439988

2. Remove remaining screws (9) that fasten outer cover (10) to the support for the implement control.

Show/hide table



Illustration 5	g01439992
Left hand hydraulic control support is shown for the detail.

3. Loosen two setscrews (11) at both ends of upper shaft (12) .

Show/hide table



Illustration 6	g01439995

4. Hold support (13) with one hand in order to prevent the support from rotating downward.

5. Slide upper shaft (12) toward the rear of cab until the upper shaft separates from the upper bearing of support (13) .

6. Keep the spacers located on the upper shaft (12) for reinstallation.

Show/hide table



Illustration 7	g01440016
Left hand hydraulic control support is shown for the detail.

7. Rotate support (13) away from the seat until the lower bearing separates from the lower shaft. Plate assembly (14) must now be removed from support (13) .

Show/hide table



Illustration 8	g01439915

8. Tilt support (13) toward the seat and remove five bolts (15) that are holding the control group to the plate assembly.

9. Place the control group aside.

Show/hide table



Illustration 9	g01439928

10. Remove lever assembly by driving out roll pin (16) that is located in the plate assembly.

11. Remove the handle from plate assembly by driving out pivot pin (17) .

Show/hide table



Illustration 10	g01439929

12. Remove the following components from the plate assembly: stud (18), washer (19), spring (20) and spacer (21) .

Show/hide table



Illustration 11	g01439936

13. Remove pin (22) and guide (23) .

14. On new plate assembly (1), install the existing hardware that was removed in Step 12 and Step 13.

15. Install the existing handle by installing the pivot pin and the roll pin that was removed in Step 10 and Step 11.

Show/hide table



Illustration 12	g01439945

Note: Make sure that you use four new bearings (2) and eight new retaining rings (3) with the new plate assembly. Each bearing requires two rings.

16. Mount four bearings (2) and eight rings (3) in the new plate assembly (1).

17. Mount new plate assembly (1) to the control group by using the existing five bolts. Refer to Illustration 8.

18. Slide the lower shaft through the lower support bearings and tighten the setscrews at both ends of the lower shaft.

Show/hide table



Illustration 13	g01439995

19. Rotate support (13) into position.

20. Slide upper shaft (12) through the upper shaft support bearings and reinstall the existing spacers.

Show/hide table



Illustration 14	g01439992
Left hand hydraulic control support is shown for the detail.

21. Tighten setscrews (11) at both ends of upper shaft (12) .

Show/hide table



Illustration 15	g01439988

22. Install cover (10) and screws (9) to the support for the implement control.

Show/hide table



Illustration 16	g01439979

23. Install the following components onto the hydraulic control support: knob (5), screws (6), cup holder (7) and cover (8) .

Show/hide table



Illustration 17	g01508274

Show/hide table



Illustration 18	g01508813

24. Remove the knob assembly (A) from the front of the hydraulic control support.

25. Remove the front two bolts (B) from the seat support (C) .

26. Use the knob and bolts that were removed in Step 24 and Step 25 in order to install the 253-9969 Hydraulic Control Support Gp (24) .

27. Test the control group for correct operation.