CB7 and CB8 Asphalt Compactor Propel System Caterpillar


Case Drain Flow for Piston Motor (Drum Propel) - Test - Solid Drum

Usage:

CB7 AT5

------ WARNING! ------

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.


------ WARNING! ------

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.


------ WARNING! ------

Personal injury can result from rotating and moving parts.

Moving fan blades and moving parts will throw or cut any object or tool that falls or is pushed into them.

Make sure no one is working on, underneath or close to an engine that is running. Make sure the area is free of personnel.


------ WARNING! ------

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.


------ WARNING! ------

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


------ WARNING! ------

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.



NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.

Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines.

Dispose of all fluids according to local regulations and mandates.


Table 1
Required Tools 
Tool  Part Number  Description  Qty 
8C-6874  Connector 
6V-9746 O-Ring Seal 
4C-8689  Flow Meter Gp 1.9 - 18.9 L/min (0.5 - 5.0 US gpm) 
6V-8941  Reducer 
6V-8397 O-Ring Seal 
6V-8556  Nut 
124-2114  Coupling 
6V-8397 O-Ring Seal 
122-6889  Hydraulic Hose 1 m (3.3 ft) 
5P-3413  Pipe Sealant 
6V-8634  Connector 
3E-7401  Adapter 
6V-9828  Cap As 
6V-9507  Plug 
4J-5477 O-Ring Seal 

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

Note: The machine is equipped with two propel motors. The propel motors are similar. The following procedure illustrates the test on the rear propel motor. The same procedure can be used to test the front propel motor.

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


    Illustration 1g06160408

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

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

  4. Place the engine in ECO mode or low idle.


      Illustration 2g06148038

    1. Select "Main Menu" (3) on the machine display.

    2. Select "Machine Setup" (4).


      Illustration 3g06148261

    3. Select "Engine Spd Sw" (5).


      Illustration 4g06148286

    4. Select "ECO" (6) or "Low" (7).


    Illustration 5g06160422

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


    Illustration 6g03243516

  6. Apply Tool (G) on the NPT side of each Tool (A). Install one Tool (A) in each side of Tool (B).

  7. Assemble Tool (C) and Tool (D). Connect one Tool (D) to each Tool (B) on Tool (A).

  8. Assemble Tool (E) and Tool (F). Make two sets of this tool assembly. Connect Tool (E) from one of tool assemblies to Tool (C) on each side of the flowmeter.


    Illustration 7g06166659

  9. Loosen clamp (10). Remove hose (9) from adapter (11). Remove the adapter from the propel motor.

  10. Reconnect hose (9) to adapter (11). Tighten clamp (10) on the hose and the adapter.

  11. Install Tool (H) in the propel motor.

  12. Install Tool (E) from inlet side of Tool (B) onto Tool (H).

  13. Install Tool (J) onto adapter (11).

  14. Install Tool (E) from outlet side of Tool (B) onto Tool (J).


    Illustration 8g06166667
    Brake hose assembly on solid drum motor.

  15. Disconnect brake supply hose assembly (12) at the two propel motors on solid drum machines. Use Tool (K) to cap the brake inlet port in the propel motors. Use Tool (L) to plug the brake supply hose assembly.

  16. Move engine start switch (8) to the START position. Release the switch when the engine starts.

  17. Place the engine in high idle.

  18. Operate the hydraulic system until the oil temperature reaches the test temperature of 45 °C (113 °F).

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


    Illustration 9g06166672

  20. Use speed control buttons (13) to set the propel speed to 50 percent.

    Note: Two things indicate when the propel speed is set to 50 percent. First, "Speed Control % 50" will appear on the display. Second, four LEDs next to speed control buttons (13) will be illuminated.

  21. Modulate propel lever (1) forward until flow is registered. (approximately one half of the total travel). Read flow on Tool (B). The flow should be between 5.5 L/min (1.4 US gpm) to 12.5 L/min (3.3 US gpm).

    Note: Motor case drain flow cannot be adjusted. If the case drain flow is greater than 12.5 L/min (3.3 US gpm), determine the source of excess leakage and repair. If the flow is less than 5.5 L/min (1.4 US gpm), test the flushing valve and orifices.

  22. Modulate propel lever (1) in reverse until flow is registered. (approximately one half of the total travel). Read flow on Tool (B). The flow should be between 5.5 L/min (1.4 US gpm) to 12.5 L/min (3.3 US gpm).

    Note: Motor case drain flow cannot be adjusted. If the case drain flow is greater than 12.5 L/min (3.3 US gpm), determine the source of excess leakage and repair. If the flow is less than 5.5 L/min (1.4 US gpm), test the flushing valve and orifices.

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

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

  25. Place the engine in ECO mode or in low idle.

  26. Move engine start switch (8) to the OFF position.

  27. Remove Tool (A). Reconnect adapter (11) to the propel motor.

  28. Perform Step 9 through Step 14 in reverse order to remove the tooling, and reconnect the case drain line to the propel motor.

  29. Remove Tool (K) from the brake inlet port in the propel motors. Remove Tool (L) from the brake supply hose assembly. Reconnect brake supply hose assembly (12) at the two propel motors on solid drum machines.

  30. If necessary, repeat this test for the other propel motor.

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