SENDER AS 3E8559 - Caterpillar

Illustration 2 g00810031
Remove the wiring harness from the two transmission output speed sensors (2). Connect a 8T-5200 Signal Generator to the two transmission output speed sensors. Use a FT-2796 Connector Harness .
Route the FT-2796 Connector Harness so that the signal generator can be mounted in the cab.
Lower the cab. Ensure that the connector harness is not trapped.
Ensure that the parking brake control is in the ENGAGED position.
Illustration 3 g00764819
740 (S/N: AXM1-UpB1P1-621) and 740 EJECTOR (S/N: AZZ1-UpB1R1-193)
Illustration 4 g01196432
735 (S/N: B1N321-Up), 740 (S/N: B1P622-Up) and 740 EJECTOR (S/N: B1R194-Up)
Connect a computer with ET software to the socket connector for ET by using the communications adapter. The socket connector for ET is located at the right side of the seat for the operator.
Turn the engine start switch to the ON. Start the engine.Switch on the computer and open up the ET software.
Check that the computer detects the three electronic control modules.
Select "Transmission".
Use ET in order to check that the service brakes and the parking brake are functioning correctly.
When you have ensured that the service brakes and the parking brake are functioning correctly, set ET to monitor the engine output speed, the transmission output speed and the actual gear.
Press and hold the service brakes.
With the engine at low idle, move the transmission control to the DRIVE position.Note: The engine will be turning against the torque converter, so there may be some small movement and vibration of the machine.
Start the signal generator. Refer to Special Instruction, SEHS8579, "8T-5200 Signal Generator".
Observe the actual gear indicator.
Observe the computer and increase the frequency of the signal from the signal generator until the torque converter lockup clutch attempts to engage. As the solenoid is not connected this will not occur. It will be possible to observe the attempt of the ECM to engage the torque converter lockup clutch by using ET. Record the transmission output speed from the ET screen as the ECM attempts to engage the torque converter lockup clutch. Refer to Table 2 and Table 3 for the correct shift points.
Increase the frequency of the signal from the signal generator until the transmission shifts to second gear. Record the transmission output speed from the ET screen as the transmission shifts to second gear. Refer to Table 2 and Table 3 for the correct shift points.
Increase the frequency of the signal from the signal generator and observe the shift points for each of the transmission gears.
Once the transmission is in SEVENTH gear, reduce the frequency of the signal from the signal generator. Record the transmission output speed from the ET screen as the transmission moves from SEVENTH gear to SIXTH gear.
Repeat this procedure for each gear until the transmission is in FIRST gear.
Move the transmission control to the NEUTRAL position and stop the engine.
Compare the shift points that were recorded with the shift points that are provided in Table 2 and Table 3.The shift points for the transmission are modified when certain actions are carried out. Engaging the brakes will result in the modification of the transmission