CP54 and CS54 Vibratory Soil Compactors Propel System Caterpillar


Pressure Override Valve (Axle Propel Pump) - Test and Adjust

Usage:

CS-54 C5R

------ 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. 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 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    
(1)     198-4234     Pressure Gauge Tool Gp     1    
198-4236 Adapter Cable As     2    
B     251-9600     Pressure Sensor

0 to 69000 kPa (0 to 10000 psi)    
2    
C     6V-9828     Cap As     1    
D     6V-9507     Plug     1    
4J-5477 O-Ring Seal     1    
E     6V-9829     Cap As     2    
F     6V-9508     Plug     2    
6V-8397 O-Ring Seal     2    
G     4C-6500     Digital Thermometer     1    
( 1 ) Tool (A) is part of the 198-4240 Digital Pressure Indicator Group.

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



    Illustration 1g01418103

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



    Illustration 2g01418123

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



    Illustration 3g01418126

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



    Illustration 4g01418128

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

  1. Block the wheels. Block the drum.

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



    Illustration 5g01419745

  1. Disconnect brake supply line (5) from drum. Use Tool (C) to cap port. Use Tool (D) to plug the hose.

  1. Raise the cab. Refer to Disassembly and Assembly, KENR6047, "Cab - Tilt".



    Illustration 6g01419763

    Drum Pump Shown From Right Side

  1. Disconnect balance line (6) and balance line (7) from drum pump. Use Tool (E) to cap ports. Use Tool (F) to plug the hoses.



    Illustration 7g01420140

    Drum Pump Shown From Right Side

  1. Disconnect drum interlock electrical connector (8) from the drum pump.



    Illustration 8g01420131

    Drum Pump Shown From Right Side

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

    • Forward pressure tap (9) on the axle pump

    • Reverse pressure tap (10) on the axle pump

  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 a few minutes. Move throttle control switch (3) to the HIGH IDLE position.

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



    Illustration 9g01420245

  1. Move shift switch (11) to the HIGH SPEED position. Move parking brake switch (2) to the RELEASE position.

    Note: The machine may move slightly during the next two steps. The slack must be removed from the drive line.

  1. Modulate propulsion lever (1) forward until the peak pressure is registered at forward pressure tap (9) (approximately one-half of the total travel). Read pressure on Tool (A). Move the propulsion lever to the NEUTRAL position. The pressure should be 35000 ± 1500 kPa (5075 ± 220 psi).

  1. Modulate propulsion lever (1) to the rear until the peak pressure is registered at reverse tap (10) (approximately one-half of the total travel). Read pressure on Tool (A). The pressure should be 35000 ± 1500 kPa (5075 ± 220 psi).

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

  1. Move throttle switch (3) to LOW IDLE position. Move shift switch (11) to the LOW SPEED position.

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

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

  1. If either pressure reading is outside the specified range, go to Step 24. If both pressure readings are inside the specified range, go to Step 29.



    Illustration 10g01420426

  1. Remove cap (12) from the POR valve. Loosen the locknut and rotate adjustment screw clockwise in order to increase POR pressure. Rotate the adjustment screw counterclockwise in order to decrease POR pressure.

  1. Hold adjustment screw. Tighten the locknut.

  1. Go to Step 13.

  1. Raise the cab. Refer to Disassembly and Assembly, KENR6047, "Cab - Tilt".

  1. Remove Tool (B) from pressure tap (9) and pressure tap (10).

  1. Remove Tool (E) and Tool (F) from balance line (6) balance line (7). Reconnect both of the balance lines.

  1. Reconnect drum interlock electrical connector (8) .

  1. Remove Tool (C) and Tool (D). Reconnect brake supply line (5) to the drum motor.

  1. Lower the cab. Refer to Disassembly and Assembly, KENR6047, "Cab - Tilt".

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