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


Pump Control Valve (Generator) - Test and Adjust

Usage:

AP-1055D A6P
Note: This test consists of two parts. The margin pressure test should be performed first. The pressure compensator test should be performed second.

------ 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 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    
A     1U-5796     Pressure Differential Tool Gp     1    
B     6V-9832     Cap As     1    
C     6V-9511     Plug     1    
D     6V-9746     O-Ring Seal     1    
E     4C-6500     Digital Thermometer     1    
F     177-7860     Hose As     1    
G     8T-0860     Pressure Gauge     1    

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



    Illustration 1g01163097

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

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

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

  1. Move screed lower switch (6) to the DOWN position. Lower the screed to the ground.

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

  1. Move engine start switch (1) to the OFF position after the engine reaches low idle.



    Illustration 2g01163099

  1. Move key switch (7) to the OFF position.

  1. Open the front access door which is on the left side of the machine.

Margin Pressure Test and Adjust




    Illustration 3g01163101

  1. Install Tool (A) . Connect the high pressure side of the tool to port "TP" (9) . Connect the low pressure side of the tool to port "TA" (8) .

  1. Move key switch (7) to the ON position. Move engine start switch (1) to the START position. Release the engine start switch after the engine starts.

  1. 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.

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



    Illustration 4g01163110

  1. Move generator switch (10) to the ON position.

  1. Read the pressure differential on Tool (A) . The differential should be 1655 -69/+276 kPa (240 -10/+40 psi).

  1. Move generator switch (10) to the OFF position.

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

  1. Move engine start switch (1) to the OFF position after the engine reaches low idle.

  1. Move key switch (7) to the OFF position.

  1. If the pressure differential is within the specified range, go to Step 15. If the pressure differential is not within the specified range, go to Step 12.



    Illustration 5g01215801

    Removed for photo purposes

  1. Loosen set screw (12) for spool (13) . In order to increase pressure, rotate adjustment screw (11) clockwise. In order to decrease pressure, rotate the adjustment screw counterclockwise.

  1. Hold adjustment screw (11) . Tighten set screw (12) .

  1. Go to Step 2.

  1. Remove the tooling. Perform the procedure that is in the "Pressure Compensator Test and Adjust" section.

Pressure Compensator Test and Adjust




    Illustration 6g01163123

  1. Disconnect the outlet hose at fitting (14) from fitting (15) . Cap fitting (15) . Plug fitting (14) .

  1. Install Tool (F) and Tool (G) on port "TP" (9) .

  1. Move key switch (7) to the ON position. Move engine start switch (1) to the START position. Release the engine start switch after the engine starts.

  1. 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.

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

  1. Move generator switch (10) to the ON position.

  1. Read the pressure on Tool (G) . The pressure should be 25000 ± 690 kPa (3626 ± 100 psi).

  1. Move generator switch (10) to the OFF position.

  1. Stop the engine. If the pressure is within the specified range, go to Step 13. If the pressure is outside the specified range, go to Step 10.



    Illustration 7g01215805

    Removed for photo purposes

  1. Loosen set screw (17) for spool (18) . In order to increase pressure, rotate adjustment screw (16) clockwise. In order to decrease pressure, rotate the adjustment screw counterclockwise.

  1. Hold adjustment screw (16) . Tighten set screw (17) .

  1. Go to Step 3.

  1. Remove the tooling. Reconnect fitting (14) and fitting (15) .

Caterpillar Information System:

AP-1055D and BG-2455D Asphalt Pavers Auxiliary System Pressure Reducing Valve - Test and Adjust
AP-1055D and BG-2455D Asphalt Pavers Auxiliary System Pump Control Valve (Auxiliary) - Test and Adjust
2005/05/30 Relocation of the Fuel Tank Vent Prevents Interference {1273}
CB-535B Vibratory Compactor Engine Air Precleaner - Clean
2005/06/13 Corrections To Steering System Pressures - Test and Adjust {4300, 4300}
140M Motor Grader Crankshaft Vibration Damper - Inspect
C4.4 Industrial Engine Engine Stopping
2005/07/11 A New Spindle Assembly Has An Improved Service Life {4001, 4201}
C4.4 Industrial Engine Fire Prevention and Explosion Prevention
583T Pipelayer Additional Messages
C7 Engines for Caterpillar Built Machines Piston and Rings
C6.6 Industrial Engine High Pressure Fuel Lines
2005/05/16 Service Replacement Relay is now Available {4493}
RM-300 Soil Stabilizer Front Propel Pump Charge Filter - Replace
IT62H Integrated Toolcarrier and 950H and 962H Wheel Loaders Machine Systems Cab - Remove
RM-300 Soil Stabilizer Fuel System Secondary Filter - Replace
2005/05/09 A New Accumulator Charging Valve (Brake) is Available for Parts Service that Improves Service Life. {4264}
RM-300 Soil Stabilizer Fuel Tank Water and Sediment - Drain
AP-1055D and BG-2455D Asphalt Pavers Auxiliary System Gear Motor Case Drain Flow (Generator) - Test
RM-500 Soil Stabilizer Hydraulic System Oil Level - Check
RM-300 Soil Stabilizer Hydraulic System Oil - Change
RM-500 Soil Stabilizer Hydraulic Tank Screen - Clean
RM-300 Soil Stabilizer Rotor Drive Differential Breather - Replace
RM-300 Soil Stabilizer Rotor Drive Differential Oil - Change
Back to top
The names Caterpillar, John Deere, JD, JCB, Hyundai or any other original equipment manufacturers are registered trademarks of the respective original equipment manufacturers. All names, descriptions, numbers and symbols are used for reference purposes only.
CH-Part.com is in no way associated with any of the manufacturers we have listed. All manufacturer's names and descriptions are for reference only.