Installation of Three-Point Hitch{7120} Caterpillar

Agricultural Tractors:

Challenger 65E (PIN: 6GS)

Challenger 75E (PIN: 6HS)

Introduction

This publication contains the necessary information for installing a three-point hitch with draft control.

Note: Order the 136-5529 Hitch Arrangement from the machine shipping order in order to obtain the correct parts for the installation of the three-point hitch. Do not order through parts. The 136-5529 Hitch Arrangement contains all of the parts that are needed to install the three-point hitch.

Show/hide table

Do not attempt to assemble this machine until you read and you understand the assembly instructions. Improper assembly procedures could result in injury or death.

Show/hide table

Personal injury can result from hot oil spray and raised attachments. Make sure all attachments have been lowered, oil is cool and the pressure has been released from the hydraulic system before removing any components or lines. Do not allow hot oil or components to contact skin.

Preparation and Removals

Show/hide table



Illustration 1	g00536356

1. Remove the access panel that is on the cab. Use the ladder that is shown in Illustration 1.

   1. Remove screws (1) from the access panel that is on the cab.

   2. Remove plate (2) from the machine.

2. Remove the rear counterweights (if equipped).

   Note: Machines that are equipped with a three-point hitch cannot be equipped with rear counterweights.

   If the machine is equipped with rear counterweights refer to Operation and Maintenance Manual, SEBU7072, "Machine Adjustments" for the procedure to remove the rear counterweights.

3. Remove the drawbar and the support assembly.

   Refer to Disassembly and Assembly, SENR1743, "Drawbar and Support Assembly" in order to remove the drawbar and the support assembly.

4. Remove the fuel tank and the hydraulic tank.

   Remove the hydraulic tank and the fuel tanks as a unit. Refer to Disassembly and Assembly, SENR1743, "Hydraulic and Fuel Tanks" for the procedure to remove the hydraulic tank and the fuel tanks as a unit.

5. Remove the implement control valves.

   Note: Put identification on all lines, hoses, wires and tubes for installation purposes. Plug all the lines, hoses and tubes in order to prevent foreign matter from entering the system.

   Remove the implement control valve bank as a unit. Refer to Disassembly and Assembly, SENR1743, "Implement Control Valves" for the procedure to remove the implement control valve bank as a unit.

Installations

Show/hide table



Illustration 2	g00536389

1. Attach tie-wraps (3) in order to hold the four implement control valves together.

Show/hide table



Illustration 3	g00536417

2. Remove three nuts and lockwashers (4) on end cover (5) .

3. Remove end cover (5). Make sure that three shims remain.

Show/hide table



Illustration 4	g00536422

4. Remove three existing studs (6) .

Show/hide table



Illustration 5	g00536427

5. Install three new 4T-4517 Studs (7) .

6. Install one 4J-5140 O-ring Seal (8), one 4J-5267 O-Ring Seal (9) and two 4D-9986 O-Ring Seals (10) into 105-1589 Manifold Assembly (11) .

Show/hide table



Illustration 6	g00536432

7. Reuse existing nuts and washers (12) in order to install 105-1589 Manifold Assembly (11). Tighten the nuts to a torque of 26 ± 5 N·m (19 ± 4 lb ft).

Show/hide table



Illustration 7	g00536438

8. If the O-rings are not already installed, install two 2K-8199 O-Ring Seals (13), one 6V-5326 O-Ring Seal (14) and two 6J-3134 Seals (15) into 9T-1799 Control Valve (16) .

   Note: These items should already be installed in 9T-1799 Control Valve (16) .

Show/hide table



Illustration 8	g00536444

9. Install two 2K-8199 O-Ring Seals (13), one 6V-5326 O-Ring Seal (14) and one 6J-3134 Seal (15) into 103-6097 Cover (17) .

Show/hide table



Illustration 9	g00536447

10. Install 103-6097 Cover (17) to 9T-1799 Control Valve (16) with three 0s-1608 Bolts (18) and three 6V-5839 Washers (19) .

Show/hide table



Illustration 10	g00536453

11. Remove two bolts and washers (20). Remove 101-5518 Angle (21). Keep 6B-6205 Spacers (22) for Step 12.

Show/hide table



Illustration 11	g00536480

12. Install 101-5518 Angle (21) with two 6B-6205 Spacers (22) that are from Step 11, two 8T-6466 Bolts (23) and two 8T-4121 Washers (24) .

Show/hide table



Illustration 12	g00536486

13. Attach flow control cables (25) to implement control valves (26) before you secure the implement control valve bank.

    Note: Refer to Disassembly and Assembly, SENR1743, "Implement Control Valves" for the procedure to install the implement control valve bank as a unit.

14. Use two 8V-9708 Spacers that were removed in the ""Remove Implement Control Valves" " Section in order to install the complete implement control valve bank. On the end with the hitch valve, use two 1D-4569 Bolts and two 8T-4223 Hard Washers in order to attach the angle assembly to the frame. On the other end of the implement control valve bank, use two 8T-8915 Bolts and two 8T-4896 Hard Washers in order to install the implement control valve bank to the existing angle.

Show/hide table



Illustration 13	g00536491

15. Connect the pump supply and the return hoses.

Show/hide table



Illustration 14	g00536495

16. Connect control cables (27) .

Show/hide table



Illustration 15	g00536517

17. Remove plug (28) on top of the housing for the return screen.

Show/hide table



Illustration 16	g00536520

Note: You may need to remove the lower line that goes to the steering motor so you will have clearance in order to install the components in Steps 18 and 19.

18. Install 3K-0360 O-Ring Seal (29) and 6V-8625 Elbow (30) into the return screen housing.

Show/hide table



Illustration 17	g00536698

19. Install 126-9483 Tube (31) with 6V-8398 O-Ring Seal (32) and 8M-2770 Clip (33). Secure 8M-2770 Clip (33) with 5S-7379 Bolt (34) and 8T-4896 Hard Washer (35) .

20. Install 9U-3823 Hose Assembly (36) to 126-9483 Tube (31) with the following components:
    • 6V-8398 O-Ring Seal (32)

    • 1S-0994 Clip (37)

    • 4L-6454 Bolt (38)

    • 8T-4896 Hard Washer (35)

    • 6V-8801 Nut (39)

    • 2A-6921 Plate (40)

    • 8T-4195 Bolt (41)

    Note: Route the hose, as shown. See Illustration 17.

21. Install 6V-9873 Connector (42) into the three-point hitch control valve with 3J-1907 O-Ring Seal (43) .

22. Install 9U-3823 Hose Assembly (36) into the three-point hitch control valve with 6V-8398 O-Ring Seal (32) .

Show/hide table



Illustration 18	g00536705

23. Remove elbow (44) from the pump load sense line.

24. Loosen clip (45) that is on the pump load sense line.

Show/hide table



Illustration 19	g00536711

25. Install 152-4612 Tube (46) to the pump load sense line.

26. Install 152-2646 Shuttle Valve (47) to the adapter manifold with 3J-1907 O-Ring Seal (48) .

27. Install the 152-4612 Tube (46) to the shuttle valve with a 6V-8398 O-Ring Seal (32). Tighten clip (45) .

Show/hide table



Illustration 20	g00538549

28. Remove the 9S-4185 O-Ring Plug and the 3K-0360 O-Ring Seal from the supply line that is for the charge pressure. The supply line is located at the steering pump.

    Note: You will need to remove the access panel on the left side of the machine in order to access the supply line for the charge pressure.

29. Install 6V-8634 Seal Connector (49) with 3K-0360 O-Ring Seal (50) .

30. Install 149-9151 Hose Assembly (51) to 6V-8634 Seal Connector (49) with 6V-8397 O-Ring Seal (52) .

Show/hide table



Illustration 21	g00536733

31. Install 6V-8724 Elbow (53) into the three-point hitch control valve with 3J-1907 O-Ring Seal (48) .

32. Install 149-9151 Hose Assembly (51) to 6V-8724 Elbow (53) with 6V-8397 O-Ring Seal (52) .

33. Install two 4D-7735 Clips (54) .

Show/hide table



Illustration 22	g00536734

34. Connect the hoses to the bosses that are on the inside of the support for the rear cab. Use two 8M-2773 Clips (55), two 5M-3062 Bolts (56) and two 8T-4896 Hard Washers (35) to connect the hoses.

35. Reconnect the hoses to the implement control valve bank.

Show/hide table



Illustration 23	g00536778

36. Install two 6V-8633 Connectors (57) with two 3D-2824 O-Ring Seals (58) in the top of the three-point hitch control valve.

37. Install 6V-9851 Elbow (59) with 6V-8398 O-Ring Seal (32) into the front port on the three-point hitch control valve.

Show/hide table



Illustration 24	g00536781

38. Buff the mounting surface in order to remove the paint that is on the rear of the differential case, as shown.

Show/hide table



Illustration 25	g00537677

39. Use the guide studs that were used during the removal of the drawbar support. The drawbar support was removed in order to install the three-point hitch. Position the guide studs in the second hole from the top in the outside row of the holes.

40. Use an appropriate lifting device in order to position the three-point hitch over the guide studs. Install fourteen 8T-9400 Bolts and fourteen 8C-6913 Hard Washers after the three-point hitch is positioned. Do not tighten the bolts.

    Note: The bolt holes behind the mounting for the hitch cylinder cannot be accessed without performing Steps 41 through 43.

Show/hide table



Illustration 26	g00536797

41. Keep the lifting device attached. Remove 8T-9383 Bolt (60) and 7X-0537 Hard Washer (61) from 4E-5110 Pin (62) .

42. Install the bottom outside 8T-9400 Bolt and 8C-6913 Hard Washer . Tighten the bolt. Remove the pin far enough in order to install the other bottom 8T-9400 Bolt and 8C-6913 Hard Washer . Tighten the bolt.

    Note: Leave the pin out far enough so that the three washers will remain in-place.

    Note: You may need a floor jack under the drawbar support in order to help position the bolt holes.

43. Reinstall 4E-5110 Pin (62), 7X-0537 Hard Washer (61) and 8T-9383 Bolt (60). Repeat Steps 41 through 43 for the other side.

44. Tighten the remaining fourteen bolts.

Show/hide table



Illustration 27	g00536803

45. Loosen bolt (63) that is on clamp (64) that is for the drain hose for the steering motor. Flip clamp (64) in order to make clearance for the bracket that is for the position sensor.

Show/hide table



Illustration 28	g00536816

46. Install 107-2281 Mounting Block Assembly (65) to 148-3579 Plate (66) with 4M-5281 Bolts (67) and 8T-4205 Hard Washers (68) .

47. Install 120-9133 Lever (69) to 107-2281 Mounting Block Assembly (65) with 3K-4897 Spring Pin (70) .

48. Install 4P-5820 Pickup Assembly (71) to 107-2281 Mounting Block Assembly (65) with two 8T-7368 Screws (72) and two 4B-4274 Washers (73) .

Show/hide table



Illustration 29	g00536842

49. Install 148-3579 Plate (66) to the rear of the tractor with two 9B-7237 Bolts (74) and two 8T-4896 Hard Washers (35) .

50. Connect the cable for the sensor to the machine's harness and tie-wrap the connection to the machine.

Show/hide table



Illustration 30	g00536846

51. Assemble the linkage assembly with the following components:
    • Two 4D-4064 Rod Ends (75)

    • One 120-9134 Rod (76)

    • One 5V-7163 Rod (77)

    • One 3K-2366 Control Rod (78)

    • Three 6V-8183 Full Nuts (79)

    • One 1S-3584 Full Nut (80)

Show/hide table



Illustration 31	g00536851

52. Install the linkage rod end to the sensor with one 4L-9337 Bolt (81), one 8T-4896 Hard Washer (35) and one 2K-4973 Locknut (82) .

53. Make sure that the hitch is fully lowered. Without the quick hitch, additional weight may be needed in order to fully lower the three-point hitch. Adjust the linkage so that the bolt hole in the linkage just lines up with the hole in the rockshaft without raising the return spring on the sensor. Turn the linkage by four full turns in order to lengthen the linkage. Install 5S-7382 Bolt (83) and 8T-4896 Hard Washer (35) into the rockshaft. Tighten the bolt to 47 ± 8 N·m (35 ± 6 lb ft).

Show/hide table



Illustration 32	g00536917

54. Connect two hoses (84) from the three-point hitch to the three-point hitch control valve.

55. Fasten the connector on the three-point hitch control valve to the connector on the machine harness.

56. Reinstall the drawbar and the related hardware. Refer to Disassembly and Assembly, SENR1743, "Drawbar and Support Assembly" for the correct procedure.

57. Reinstall the fuel tank and the hydraulic tank assembly. Refer to Disassembly and Assembly, SENR1743, "Hydraulic and Fuel Tanks" for the correct procedure.

Show/hide table



Illustration 33	g00536928

58. Remove two plugs (85) from the right hand console.

Show/hide table



Illustration 34	g00536929

59. Remove 6D-0679 Knob (86), screw (87), washer (88) and spring (89) from 120-9131 Implement Electronic Control Module (90) .

Show/hide table



Illustration 35	g00536933

60. Install 3W-6756 Knob (91) that is for the depth stop from the inside of the cab.

Show/hide table



Illustration 36	g00536961

61. Install 3W-6757 Plate (92) and 2D-6235 Locknut (93) for the depth stop below the right hand console. Access this area from the right fender.

Show/hide table



Illustration 37	g00536962

62. Install the 136-4448 Lever from 120-9131 Implement Electronic Control Module (90) with two 8T-4205 Hard Washers (94), two 4M-5281 Bolts (95) and two 6V-8185 Nuts (96) .

Show/hide table



Illustration 38	g00536964

Note: The components in Step 63 were removed in Step 59.

63. Install screw (87), washer (88) and spring (89) onto 120-9131 Implement Electronic Control Module (90) .

Show/hide table



Illustration 39	g00536965

64. Install 148-6435 Ag Hitch Electronic Control (97) with three 4M-5281 Bolts (95), three 6V-8185 Nuts (96) and six 8T-4205 Hard Washers (94) .

Show/hide table



Illustration 40	g00536966

65. Install 136-5487 Hitch Harness Assembly (98), as shown.

    Note: Make sure that the ring terminal that is on the ground wire is connected to the ground stud. The ground stud is near the fuse panel for the console.

Show/hide table



Illustration 41	g00536967

66. Install 129-6466 Roller Switch Assembly (99), as shown. Refer to Specifications, SENR1740, "Draft Control Throttle Switch Adjustment" for the procedure to adjust 129-6466 Roller Switch Assembly (99) .

Show/hide table



Illustration 42	g00536968

67. Remove the plug in the flywheel and install speed sensor (100). Refer to Specifications, SENR1740, "Engine Speed Sensor Adustment" for the correct adjustment procedure. Connect the wires to the harness that is located on the left side of the engine.

Show/hide table



Illustration 43	g00536969

68. Install 146-7873 Rocker Switch (101) and 146-7874 Rocker Switch (102) in the cab. Install 6D-0679 Knob (86) on 120-9131 Implement Electronic Control Module (90) .

69. Install the decals in the appropriate locations.

Show/hide table



Illustration 44	g00536356

70. Install plate (2) with screws (1) on the access panel for the cab.

71. Prepare the machine for operation. Refer to Operation and Maintenance Manual, SEBU7072.

72. Calibrate the controller. Refer to Systems Operation/Testing and Adjusting in order to calibrate the three-point hitch.