SWING BEARING 0857964 - Caterpillar

Table 1
Required Tools    
Part Number     Description     Quantity    
6V-3079     Hose Assembly     1    
6V-4143     Coupler     1    
6V-3079     Hose Assembly     1    
8T-0855     Pressure Gauge (0 to 4,000-kPa (0 to 580-psi))     1    
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.
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.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
Disconnect the electrical harness from the lockup clutch solenoid. Disconnect the upshift solenoid and the downshift solenoid.
The transmission control must be in the NEUTRAL position.
The downshift solenoid remains activated while the transmission is in the NEUTRAL position. This causes +24 volts to be supplied to the electrical harness for the downshift solenoid.
Use two Deutsch 2-pin connectors (one plug and one receptacle) and two 16 gauge wires in order to make a jumper harness. The two wires should be approximately 4.5 m (15 ft) long. Connect one end of the jumper harness to the harness for the downshift solenoid.
Illustration 1 g01054912
Location of the torque converter lockup clutch and solenoid valve
Illustration 2 g01054913
(1) Pressure tap for the lockup clutch pressure "LU"
Use a coupler and a hose to connect a 8T-0855 Pressure Gauge (0 to 4,000-kPa (0 to 580-psi)) at pressure tap (1) .
Start the engine with the parking brake is engaged. Run the engine at 1300 rpm with the transmission in the NEUTRAL position.Note: In order to maintain 1300 rpm for this test, disconnect the throttle position sensor. Then use the throttle backup switch.
Look at the pressure gauge. Connect the jumper harness from the downshift solenoid to the lockup clutch solenoid. The pressure on the gauge should be 1515 70 kPa (220 10 psi).
Stop the engine. Disconnect the jumper harness from the lockup clutch solenoid. After the pressure is correctly set, remove the test equipment.
Illustration 3 g01374078
Synchronizing valve (2) Shuttle valve (3) Spring (4) Spring (5) Load piston orifice (6) Load piston plug (7) Load piston (8) Selector pistonProblem: The oil pressure is not 0 kPa (0 psi) when the lockup clutch solenoid is deactivated.
Probable Cause
Selector piston (8) is stuck.
Spring (3) is weak or broken.
Shuttle valve (2) is stuck.
The lockup clutch solenoid is damaged or worn. Perform the 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 the Testing and Adjusting, "Torque Converter Lockup Clutch