KIT-GASKET 4304576 - Caterpillar

Illustration 1 g00553691
MODULATION SWITCH\DISPLACEMENT SOLENOID VALVESDetail...Reference: Refer toTroubleshooting, "Troubleshooting - General Information".System Response:This fault can be active when the key start switch is turned ON. When this fault is active and the all wheel drive system is ON (AUTOMATIC or MANUAL), the all wheel drive ECM will enter the diagnostic operating mode. The all wheel drive system will shut off and a category three warning will be activated. Test Step 1. Perform the following test: Machine Preparation for TroubleshootingResults:
OK - Proceed to test step 2.Test Step 2.
Turn the key start switch to the OFF position. Disconnect the harness connector from the forward pump displacement solenoid valve.
Use a 6V-7070 Digital Multimeter in order to measure the resistance at the machine harness. Measure the resistance between contact 1 (wire 796-BR) and contact 2 (wire 912-GY). The resistance should be approximately 30 ohms.Schematic...
Illustration 2 g00553691
MODULATION SWITCH\DISPLACEMENT SOLENOID VALVESExpected Result:The resistance is approximately 30 ohms.Results:
No - Proceed to test step 3.
Yes - Proceed to test step 4.Test Step 3.
Replace the forward pump displacement solenoid valve. Use a new Caterpillar part for replacement.PartsReference: Refer toTroubleshooting, "115-1517 ACTUATOR GP-PUMP PIN 1AL1-UP. PART OF 6E-3471 PUMP GP-PISTON".SpecificationsReference: Refer toTroubleshooting, "Piston Pump (All Wheel Drive)".Expected Result:The forward pump displacement solenoid valve has been replaced.Results:
Repair Complete - Stop.Test Step 4.
Connect the harness connector to the forward pump displacement solenoid valve. Disconnect the harness from the all wheel drive ECM.
Use a 6V-7070 Digital Multimeter in order to measure the resistance at the harness for the all wheel drive ECM. Check for continuity between contact 11 (wire 796-BR) and contact 39 (wire 912-GY). Measure the resistance between contact 11 (wire 796-BR) and contact 39 (wire 912-GY). The resistance should be approximately 30 ohms.Schematic...
Illustration 3 g00550731
ECMExpected Result:The resistance is approximately 30 ohms.Results:
Yes - Proceed to test step 5.
No - Proceed to test step 6.Test Step 5.
Clean the contacts on the harness for the all wheel drive ECM. Connect the harness to the all wheel drive ECM.
Turn the key start switch to the ON position. Put the all wheel drive ECM in the service mode. Clear all the inactive faults from the all wheel drive ECM.
Check the all wheel drive ECM for the 390-06 fault code.How...Reference: Refer toTroubleshooting, "Using The ECM Display For Troubleshooting".Expected Result:The 390-06 fault code is present.Results:
Yes - Proceed to test step 7.
No - The fault does not exist at this time. The initial fault was probably caused by a poor electrical connection at one of the harness connectors. Resume normal machine operation. Stop.Test Step 6.
Repair the faulty harness or replace the faulty harness. Use new Caterpillar parts for replacement.Expected Result:The harness has been repaired or the harness has been replaced.Results:
Repair Complete - Stop.Test Step 7. Perform the following test: All Wheel Drive Electronic Control - TestResults:
OK - Stop.
REPAIRED, OK - Stop.