AP-1055D and BG-2455D Asphalt Pavers Propel System Caterpillar

Note: This procedure tests the pump flow by measuring the speed of the tracks. This machine is equipped with two identical propulsion pumps. One pump provides the flow in order to drive the right track. The second pump provides the flow in order to drive the left track. This test should be performed on both sides of the machine. If this test reveals a difference in performance between the right side and left side of the machine, a pump synchronization procedure may need to be performed. Refer to the procedure in Testing and Adjusting, "Pump Synchronization–Test and Adjust" in order to synchronize the propulsion pumps.

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

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.

Show/hide table

To prevent injury or death, never work under a machine while a test is being performed.

Show/hide table

Personal injury or death can result from lifting a heavy component. The heavy component can fall if using an incorrect hoist and/or sling or fastener to lift the load. Be sure the hoist and other devices have the correct lifting capacity to lift a heavy component. The approximate weight of the heavy component is given below.

Table 1

AP-1055D Asphalt Paver with 10-20WB Extend-a-Mat Screed
Approximate Weight	20800 kg (45850 lb)

Table 2

Required Tools
Tool	Part Number	Description	Qty
(A) (1)	1U-7771	Tachometer	1
B (1)	1U-6605	Reflective Tape	1
C	4C-6500	Digital Thermometer	1

( 1 )

Tool (A) and Tool (B) are part of 1U-6602 Photo-Tachometer .

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

Show/hide table



Illustration 1	g01162799

2. Move propulsion lever (2) to the NEUTRAL position.

3. Rotate speed dial (3) to the MINIMUM position.

4. Move travel mode switch (6) to the PAVE position.

5. Move parking brake switch (4) to the ON position.

6. Move screed lower switch (7) to the RAISE position. Completely raise the screed.

Show/hide table



Illustration 2	g01162973

7. Engage screed lock (8) on both sides of the machine.

8. Move throttle control switch (5) to the LOW IDLE position. Hold the switch in this position for less than 1 second.

9. After the engine reaches low idle, move engine start switch (1) to the OFF position.

Show/hide table



Illustration 3	g01163065

10. Move key switch (9) to the OFF position.

11. Use a suitable lifting device in order to raise the machine. For this test, the machine must be adequately supported and both tracks must be off the ground.

Show/hide table



Illustration 4	g01163149

12. Place a small strip of reflective tape Tool (B) on final drive housing (10). Place the tape so that the tape is perpendicular to the machine. Repeat this process for the other side of the machine.

13. Clear all personnel away from the machine except the operator and an assistant. The assistant must remain 1.25 m (4 ft) away from the machine. The assistant must also be in the full view of the operator.

14. Move key switch (9) to the ON position. Move engine start switch (1) to the START position. Release the engine start switch when the engine starts.

15. Move throttle control switch (5) to the HIGH IDLE position. Hold the switch in this position for less than 1 second. The engine speed should increase to 2310 rpm.

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

17. Rotate speed dial (3) to the MAXIMUM position.

18. Move parking brake switch (4) to theOFF position.

19. Move propulsion lever (2) to the full FORWARD position.

20. Use Tool (A) to measure the rotational speed of final drive housing (10). The speed should be 26 ± 2.5 rpm. Perform this step for both sides of the machine.

21. Move propulsion lever (2) to the full REVERSE position.

22. Use Tool (A) to measure the rotational speed of final drive housing (10). The speed should be 26 ± 2.5 rpm. Perform this step for both sides of the machine.

23. Move propulsion lever (2) to the NEUTRAL position.

24. Rotate speed dial (3) to the MINIMUM position.

25. Move parking brake switch (4) to the ON position.

26. Stop the engine. Use a suitable lifting device to lower the machine to the ground.