CONTROL GP-PARKING BRAKE 2706341 - Caterpillar

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. 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 on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Check the all wheel drive solenoid valve and the valve seat for debris or for wear that may interfere with the valve operation. Remove the all wheel drive solenoid valve from the all wheel drive control valve.
Inspect the cartridge assembly and the valve seat for debris or wear. Debris or wear on the cartridge assembly or the valve seat can cause fluid leakage.How...Reference: Refer toTroubleshooting, "All Wheel Drive Control Valve".Expected Result:The cartridge assembly and the valve seat are free of debris or wear.Results:
No - Proceed to test step 7.
Yes - Proceed to test step 8.Test Step 6.
An electrical problem exists in the all wheel drive system. Check the all wheel drive electronic control module (ECM) for any fault codes. Continue to troubleshoot the electrical system.Expected Result:Results:
OK - Stop.Test Step 7.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. 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 on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Replace the all wheel drive solenoid valve. Use new Caterpillar parts for replacement.PartsReference: Refer toTroubleshooting, "6T-5859 VALVE GP-SOLENOID PIN 1AL1-UP. 24 VOLT PART OF 6E-3906 VALVE GP-CONTROL".How...Reference: Refer toTroubleshooting, "All Wheel Drive Control Valve".SpecificationsReference: Refer toTroubleshooting, "All Wheel Drive Control Valve".Expected Result:The all wheel drive solenoid valve has been replaced.Results:
Repair Complete - Stop.Test Step 8.
Install the all wheel drive solenoid valve to the all wheel drive control valve.How...Reference: Refer toTroubleshooting, "All Wheel Drive Control Valve".SpecificationsReference: Refer toTroubleshooting, "All Wheel Drive Control Valve".Expected Result:The all wheel drive solenoid valve has been installed.Results:
Continue - Inspect the drive spool for any wear or damage. Proceed to test step 9.Test Step 9. Perform the following test: Drive Spool for All Wheel Drive Control Valve - InspectResults:
OK - Stop.
REPAIRED, OK - Stop.