CP56, CS56, CP64, CS64, CP74 and CS74 Vibratory Compactors Propel System Neutral Start Switch - Test and Adjust Caterpillar


Neutral Start Switch - Test and Adjust
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CP56, CS56, CP64, CS64, CP74 and CS74 Vibratory Compactors Propel System [KENR5721]
ELECTRICAL AND STARTING SYSTEM
SWITCH GP
CP56, CS56, CP64, CS64, CP74 and CS74 Vibratory Compactors Propel System Neutral Start Switch - Test and Adjust

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

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.


------ 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.


Table 1
Required Tools 
Tool  Part
Number 
Description  Qty 
146-4080  Digital Multimeter Gp
0 to 500 kPa (0 to 70 psi) 
7X-1710  Multimeter Probe 

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


    Illustration 1g01412481

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


    Illustration 2g01412483

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


    Illustration 3g01412484

  4. Move throttle switch (3) to the LOW IDLE position.


    Illustration 4g01412486

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

  6. Raise the cab. Refer to Disassembly and Assembly, KENR6004, "Cab - Tilt".


    Illustration 5g01414238
    The Drum Pump is Shown From Left Side.

  7. Disconnect tie rod (5).


    Illustration 6g01414241
    The Axle Pump is Shown From Left Side.

  8. Disconnect electrical connector (6) for the neutral start switch.

  9. Insert Tool (B) into pin "1" of electrical connector (6).

  10. Insert Tool (C) into pin "2" of electrical connector (6).

  11. Connect Tool (B) to Tool (A).

  12. Connect Tool (C) to Tool (A).

  13. Set Tool (A) to measure continuity.


    Illustration 7g01414244

  14. Ensure that direction control valve (7) on the axle pump is in the NEUTRAL position.


    Illustration 8g01414250
    The Axle Pump is Shown From Left Side.

  15. Loosen locknut (9). If necessary, rotate neutral start switch (8) counterclockwise until the circuit across the switch is open.

  16. Rotate neutral start switch (8) clockwise until the circuit across the switch just closes.

  17. Hold neutral start switch (8). Tighten locknut (9).

  18. Remove Tool (B) and Tool (C).

  19. Reconnect electrical connector (6) for the neutral start switch.

  20. Install tie rod (5).

  21. Lower the cab. Refer to Disassembly and Assembly, KENR6004, "Cab - Tilt".

  22. Move engine start switch (4) to the START position. Release the switch when the engine starts. If the engine will not start, go to Step 6. If the engine starts, go to Step 23.

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

  24. Move propulsion lever (1) slightly out of NEUTRAL and into the FORWARD range.

  25. Move engine start switch (4) to the START position. If the engine starts, immediately stop the engine, and go to Step 6. If the engine does not start, move the engine start switch to OFF position. Move propulsion lever (1) to the NEUTRAL position.

  26. Move propulsion lever (1) slightly out of NEUTRAL and into the REVERSE range.

  27. Move engine start switch (4) to the START position. If the engine starts, immediately stop the engine, and go to Step 6. If the engine does not start, move the engine start switch to OFF position. Move propulsion lever (1) to the NEUTRAL position.

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