CB44B Vibratory Asphalt Compactor Propel System Caterpillar

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Diesel engine exhaust contains products of combustion which may cause personal injury. Always start and operate the engine in a well ventilated area, and, if in an enclosed area, vent the exhaust to the outside.

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Personal injury can result from rotating and moving parts. Stay clear of all rotating and moving parts. Never attempt adjustments while the machine is moving or the engine is running unless otherwise specified. The machine must be parked on a level surface and the engine stopped. Attach a "Do Not Operate" or similar warning tag to the start switch and controls before servicing, repairing, or making adjustments to the machine.

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Personal injury or death can result from sudden machine movement. Sudden movement of the machine can cause injury to persons on or near the machine. To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine.

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Escaping fluid under pressure, even a pinhole size leak, can penetrate body tissue, causing serious injury, and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury. Always use a board or cardboard when checking for a leak.

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Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the attachments have been lowered, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.

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Injury to personnel can result if they are not in the operator's view. Allow only essential personnel near the machine, and make sure the personnel are in the operator's view when testing, to prevent injury. Make sure checks are done in an open area.

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Hot parts or hot components can cause burns or personal injury. Do not allow hot parts or components to contact your skin. Use protective clothing or protective equipment to protect your skin.

Note: In order to perform this test and adjust, the brakes must be disconnected or the machine must be placed on jack stands.

1. Drive the machine to a smooth, horizontal surface.
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   Illustration 1	g03223956

2. Move propel lever (1) to the NEUTRAL position.

3. Move parking brake switch (2) to the ON position.

4. Use throttle control switch (3) in order to operate the engine in ECO mode or in low idle.

   Note: Two things indicate when the engine is in ECO mode. First, "ECO" will appear on the display. Second, the second LED next to throttle control switch (3) will be illuminated. Two things indicate when the engine is at low idle. First, "Low Idle" will appear on the display. Second, the first LED next to the throttle control switch will be illuminated.

5. Move engine start switch (4) to the OFF position.
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   Illustration 2	g03223960

6. Unlock latch (5) and open engine compartment door (6) on the right side of the machine.
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   Illustration 3	g03223976

7. Remove ten bolts (7) and remove side panel (8) on the right side of the machine.
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   Illustration 4	g03223996

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   Illustration 5	g03223999

8. Disconnect brake hose assemblies (9) at the four motors. Use Tool (D) to cap the port. Use Tool (E) to plug the hose.
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   Illustration 6	g03224002

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   Illustration 7	g03224004

9. Mark the electrical connections. Disconnect solenoid electrical connections (10).

10. Assemble the tooling. Connect Tool (C) to Tool (B). Assemble two sets of Tool (C) and Tool (B).

11. Install both sets of Tool (B) on Tool (A).
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    Illustration 8	g03224007

12. Remove the plug from port "M5" (11) on the left side of the pump. Install one Tool (G) in port "M5" (11). Tighten Tool (G) to a torque of 12 N·m (9 lb·ft).

13. Connect Tool (C) to Tool (G).
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    Illustration 9	g03224010

14. Remove the plug from Port "M4" (12) on the right side of the pump. Install other Tool (G) in port "M4" (12). Tighten Tool (G) to a torque of 12 N·m (9 lb·ft).

15. Connect Tool (C) to Tool (G) in port "M4" (12).
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    Illustration 10	g03224012

16. Connect Tool (K) and Tool (L) to Tool (J). Connect Tool (K) to diagnostic connector (13). Connect Tool (L) to USB port on Tool (H).

17. Move engine start switch (4) to the START position. Release the switch when the engine starts.

18. Operate the engine at low idle for a few minutes. Use throttle control switch (3) in order to operate the engine in high idle.

    Note: Two things indicate when the engine is at high idle. First, "High Idle" will appear on the display. Second, all three LED's next to throttle control switch (3) will be illuminated.

19. Monitor the hydraulic oil temperature with Tool (F). Operate the machine until the oil temperature reaches 43 ± 5.6 °C (110 ± 10 °F).

20. Use throttle control switch (3) in order to operate the engine in ECO mode or in low idle.

    Note: Two things indicate when the engine is in ECO mode. First, "ECO" will appear on the display. Second, the second LED next to throttle control switch (3) will be illuminated. Two things indicate when the engine is at low idle. First, "Low Idle" will appear on the display. Second, the first LED next to the throttle control switch will be illuminated.

21. Move parking brake switch (2) to the OFF position.

    Note: First time users need to perform the tasks in the Communication and Connections Wizard. This wizard allows the Windows® operating system to recognize the USB device. Follow the on screen instructions.

22. Launch the Plus+1^TM program on the computer.
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    Illustration 11	g03224016

23. Click on "Status" button (14).

24. Check "Active Codes" (15). Clear any open "Active Codes".
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    Illustration 12	g03224017

25. Click on "Hydraulics" icon (16).
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    Illustration 13	g03224037

26. Click on "Piston Pump Neutral Test" (17).
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    Illustration 14	g03224039

27. Click on "Enable" icon (18).
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    Illustration 15	g03224041

28. When "Piston Pump Neutral Test" (17) is in "Enabled" mode (19), the Plus+1^TM program is launched.

29. Read differential pressure on Tool (A). Differential pressure should be less than 70 kPa (10 psi).

30. If, the differential pressure is greater than 70 kPa (10 psi) go to Step 31. If, the differential pressure is less than 70 kPa (10 psi) go to Step 33.
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    Illustration 16	g03224043

    Note: A small movement of the adjustment mechanism is all that will be required. Larger movements may cause machine movement.

31. Hold adjustment screw (21) and loosen locknut (20). Watch the pressure gauges. Rotate adjustment screw (21) until the differential pressure is less than 70 kPa (10 psi).

32. Hold adjustment screw (21) in place and tighten locknut (20). Tighten locknut (20) to a torque of 10 N·m (7 lb·ft).

33. Move parking brake switch (2) to the ON position.

34. Move engine start switch (4) to the OFF position.

35. Remove the tooling from port "M5" (11) and port "M4" (12). Replace the plugs. Tighten the plugs to a torque of 12 N·m (9 lb·ft).
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    Illustration 17	g03224045

36. Remove the plug from port "M4" (22) on the left side of the pump. Install one Tool (G) in port "M4" (22). Tighten Tool (G) to a torque of 12 N·m (9 lb·ft).

37. Connect Tool (C) to Tool (G) in port "M4" (22).
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    Illustration 18	g03224057

38. Remove the plug from port "M5" (23) on the right side of the pump. Install other Tool (G) in port "M5" (17). Tighten Tool (G) to a torque of 12 N·m (9 lb·ft).

39. Connect Tool (C) to Tool (G) in port "M5" (23).

40. Move engine start switch (4) to the START position. Release the switch when the engine starts.

41. Use throttle control switch (3) in order to operate the engine in ECO mode or in low idle.

    Note: Two things indicate when the engine is in ECO mode. First, "ECO" will appear on the display. Second, the second LED next to throttle control switch (3) will be illuminated. Two things indicate when the engine is at low idle. First, "Low Idle" will appear on the display. Second, the first LED next to the throttle control switch will be illuminated.

42. Move parking brake switch (2) to the OFF position.

43. Repeat Step 22 through Step 28 in order to launch the Plus+1^TM program on the computer.

44. Read differential pressure on Tool (A). Differential pressure should be less than 70 kPa (10 psi).

45. If, the differential pressure is greater than 70 kPa (10 psi) go to Step 46. If, the differential pressure is less than 70 kPa (10 psi) go to Step 48.
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    Illustration 19	g03224058

    Note: A small movement of the adjustment mechanism is all that will be required. Larger movements may cause machine movement.

46. Hold adjustment screw (25) and loosen locknut (24). Watch the pressure gauges. Rotate adjustment screw (25) until the differential pressure is less than 70 kPa (10 psi).

47. Hold adjustment screw (25) in place and tighten locknut (24). Tighten locknut (24) to a torque of 10 N·m (7 lb·ft).

48. Move parking brake switch (2) to the ON position.

49. Move engine start switch (4) to the OFF position.

50. Remove the tooling from port "M5" (23) and port "M4" (22). Replace the plugs. Tighten the plugs to a torque of 12 N·m (9 lb·ft).

51. Connect solenoid electrical connections (10).

52. Remove Tool (E) from brake supply hose assembly (9) at the drum propel motors. Remove Tool (D) from the brake inlet port at the drum propel motors. Connect brake supply hose (9) to the brake inlet ports on the propel motors.

53. Remove the tooling from the diagnostic port.

54. Position side panel (8) and install ten bolts (7).

55. Close engine compartment door (6) on the right side of machine and secure latch (5).