CP76 and CS76 Vibratory Compactors Propel System Parking Brake - Test Caterpillar


Parking Brake - Test
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CP76 and CS76 Vibratory Compactors Propel System [KENR6089]
BRAKING SYSTEM
BRAKE GP
CP76 and CS76 Vibratory Compactors Propel System Parking Brake - Test

Note: Refer to Operation and Maintenance Manual, KEBU7543, "Parking Brake - Check". If the required incline is not available, perform the following procedure.

------ 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.

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------ 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.

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------ 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.

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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, "AVSpare Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in AVSpare machines.

Dispose of all fluids according to local regulations and mandates.


Table 1
Required Tools    
Tool     Part
Number    
Description     Qty    
A     198-4234     Pressure Gauge Tool Gp

0 to 19 L/min (0 to 5 US gpm)    
1    
198-4236 Adapter Cable As     2    
B     251-9600     Pressure Sensor

0 to 69000 kPa (0 to 10000 psi)    
2    
C     4C-6500     Digital Thermometer     1    

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



    Illustration 1g01407630

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



    Illustration 2g01407609

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



    Illustration 3g01407610

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



    Illustration 4g01407660

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



    Illustration 5g01408900

  1. Remove bolts (5) and remove right cover plate (6) .



    Illustration 6g01408904

  1. Remove bolts (7) and remove left cover plate (8) .

  1. Block the wheels. Block the drum.



    Illustration 7g01408980

  1. Loosen set screw (9). Fully rotate the needle valve in the clockwise direction.



    Illustration 8g01410783

    The Axle Pump is Shown From Right Side.

  1. Connect one Tool (B) to each of the following pressure taps:

    • Forward pressure tap (10) on the axle pump

    • Reverse pressure tap (11) on the axle pump

  1. Connect each Tool (B) to Tool (A) .

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

  1. Operate the engine at low idle for few minutes. Move throttle switch (3) to the HIGH IDLE position.

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



    Illustration 9g01410788

  1. Move shift switch (12) to the HIGH SPEED position. Move parking brake switch (2) to the RELEASE position.

    Note: The machine may move during the next steps. The drum may rotate several degrees in order to remove the backlash in the gear train. After the backlash in the gear train has been removed, the drum may slide depending on the underfoot conditions but the drum should not rotate.

  1. Move propulsion lever (1) to the FULL FORWARD position. Monitor pressure on Tool (B). The pressure should be 44000 ± 1000 kPa (6380 ± 145 psi). The drum and the wheels should not rotate after the backlash in the gear train has been removed.

  1. Move propulsion lever (1) to the FULL REVERSE position. Monitor pressure on Tool (B). The pressure should be 44000 ± 1000 kPa (6380 ± 145 psi). The drum and the wheels should not rotate.

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

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

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

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

  1. Remove Tool (B) from forward pressure tap (10). Remove second Tool (B) from reverse pressure tap (11).

  1. Remove Tool (C) and Tool (D). Reconnect brake supply line (9) .

  1. Replace cover plates (6) and (8). Install bolts (5) and (7) .

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