KIT-REPAIR 2358631 - Caterpillar

Table 1
Required Tools    
Part Number     Part Description     Qty    
6V-3079     Hose As     1    
6V-4143     Coupler     2    
8T-0855     Pressure Gauge (0 to 4,000-kPa (0 to 580-psi))     1    Note: Make sure that the filters and the screens are clean before you test any pressures. Make sure that the oil is at operating temperature before you perform this test.
Personal injury or death can result from sudden machine movement.Sudden movement of the machine or the release of oil under pressure can cause injury to persons on or near the machine. To prevent possible injury before testing and adjusting the power train system, perform the procedure in the Testing and Adjusting, Troubleshooting, "General Information" section.
This test will show the following conditions if the conditions exist:
The maximum lockup pressure is correct.
The operation of the modulation reduction valve is correct.Procedure
Illustration 1 g01186804
Torque converter lockup clutch and solenoid valve (A) Pressure tap for lockup pressure (1) Harness connector for lockup solenoid (2) Lockup solenoid
Disconnect electrical harness at connector (1) for lockup clutch solenoid (2) .
Using a 2-pin sure seal connector, two alligator clips and two 16-gauge wires approximately 4.5 m (15 ft) long, make a jumper harness. Connect the clip ends of the jumper harness to the positive (+) and negative (-) terminals of the machine battery. This will supply + 24 Volts to activate the lockup solenoid.
Use a coupler and a hose to connect a 8T-0855 Pressure Gauge (0 to 4,000-kPa (0 to 580-psi)) to the nipple at pressure tap (A) .
With the parking brake engaged, start and run the engine at low idle rpm with the transmission in NEUTRAL.
Connect the connector end of the jumper harness to the connector of the lockup solenoid. The pressure on the gauge must be 1690 70 kPa (245 10 psi).
Disconnect the jumper harness from the lockup clutch solenoid. The pressure on the gauge must be 0 kPa (0 psi).
Stop the engine. After the pressure is correctly set, remove the test equipment.
Illustration 2 g01186806
Problem: The oil pressure is not 0 kPa (0 psi) when the lockup clutch solenoid is deactivated.
Probable Cause:
Selector piston (3) is stuck.
Spring (10) is weak or broken.
Shuttle valve (9) is stuck.
The lockup clutch solenoid is not operating correctly. Perform the test in Testing and Adjusting, "Solenoid Valve - Test".Problem: The oil pressure is 0 kPa (0 psi) with the lockup clutch solenoid activated.
Probable Cause:
There is either a small amount of pilot oil or no pilot oil. Perform the test in Testing and Adjusting, "Torque Converter Lockup Clutch Pilot Pressure - Test and Adjust".
Incorrect operation of shuttle valve (9) .
Outer spring (7) is weak or broken, and/or inner