CB2.5, CB2.7, CB2.9 and CC2.6 Vibratory Utility Compactors Propel System Caterpillar

Show/hide table

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.

Show/hide table

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.

Show/hide table

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.

Show/hide table

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.

Specifications

Introduction

This test indicates the condition of the propel motor. Perform this test if machine cannot reach full speed.

Required Tools

Illustration 1	g06114189

1. Apply Tool (H) to the pipe thread on each Tool (A).

2. Install one Tool (A) in each end of Tool (B).

3. Install one Tool (C) and one Tool (D) on each Tool (A).

4. Install Tool (E) on Tool (G).

5. Install Tool (F) on Tool (G).

6. Connect Tool (E) to Tool (C) in inlet side of Tool (B).

Test Preparation

1. Drive the machine to a smooth, horizontal surface.
   Show/hide table

   Illustration 2	g06114170

2. Move propel lever (1) to the NEUTRAL position.
   Show/hide table

   Illustration 3	g06114171

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

4. Move engine speed switch (3) into the LOW-IDLE position to operate the engine in low idle.

5. Move engine start switch (4) to the OFF position.
   Show/hide table

   Illustration 4	g06114173

6. Unhook latches (5) on each side of the engine compartment, and open engine hood (6).
   Show/hide table

   Illustration 5	g06114175

7. Remove locking pin (7) from hood support bracket (8). Move the bracket to support engine hood (6). Install the locking pin to secure the hood support bracket.
   Show/hide table

   Illustration 6	g06114177

8. Loosen the lock ring on needle valve (9). Rotate needle valve (9) clockwise to close the valve.

9. Remove the rear wheels on the side of the machine that is being tested.

10. If the test is being performed on the right rear wheel motor, go to Step 11. If the test is being performed on the left rear wheel motor, go to Step 12.
    Show/hide table

    Illustration 7	g06114187

11. Disconnect hose coupling (11) from fitting (10). Connect Tool (F) to fitting (10). Connect hose coupling (11) to the inlet side of Tool (B) and perform the test procedure.
    Show/hide table

    Illustration 8	g06114188

12. Disconnect hose coupling (13) from fitting (12). Connect Tool (F) to fitting (12). Connect hose coupling (13) to the inlet side of Tool (B) and perform the test procedure.

Test Procedure

1. Move engine start switch (4) into the START position. Release the switch when the engine starts.

2. Operate the engine at low idle for a few minutes. Move engine speed switch (3) to the HIGH-IDLE position to operate the engine in high idle.

3. Monitor the hydraulic oil temperature with Tool (J). Operate the machine until the oil temperature reaches the test temperature listed in the Specifications Section above.

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

5. Move propel lever (1) into the forward range. Do not allow the engine to lug and perform the test procedure.

   Note: If the machine moves during the next two steps, immediately move propel handle into the neutral position. The parking brakes must be repaired before this procedure is completed.

6. Record flow on Tool (B). The flow should be less than the minimum case drain flow listed in the Specifications Section above.

7. Move propel lever (1) into the reverse range. Do not allow the engine to lug.

8. Record flow on Tool (B). The flow should be less than the minimum case drain flow listed in the Specifications Section above.

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

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

11. Move engine speed switch (3) to the LOW-IDLE position to operate the engine in low idle.

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

13. If the test is being performed on the right rear wheel motor, go to Step 14. If the test is being performed on the left rear wheel motor, go to Step 17.

14. Remove hose coupling (11) from the inlet side of Tool (B).

15. Remove Tool (B) from fitting (10).

16. Connect hose coupling (11) to fitting (10).

    Note: If the flow is outside the specified range, repair or replace the wheel motor, and retest the flow.

17. Remove hose coupling (13) from the inlet side of Tool (B).

18. Remove Tool (B) from fitting (12).

19. Connect hose coupling (13) to fitting (12).

    Note: If the flow is outside the specified range, repair or replace the wheel motor, and retest the flow.

20. Rotate needle valve (9) counterclockwise to open the valve. Tighten the lock ring.

21. Remove locking pin (7) from hood support bracket (8). Move the bracket into the storage position. Install the locking pin to secure the hood support bracket.

22. Close engine hood (6) and secure latches (5).