TRANSMISSION 6U3065 - Caterpillar

Illustration 1 g00021430
Transmission Output Speed Sensor (TOS)The TOS is located on the gear housing at the front of the transmission.Note: The air gap between the gear and the sensor is automatically adjusted when the TOS is properly installed.Prior to replacement of the sensor, ensure that the sensor has failed. Always check that the power is available to the sensor. The correct voltage is approximately +10 VDC. Measure this voltage between the pins "A" and "B" of the machine harness connector for the sensor. Check for metal shavings on the magnetic tip or the sensor gear teeth.Follow the steps below in order to replace the sensor.
Turn the disconnect switch to the OFF position. Disconnect the machine harness connector from the sensor. Remove the sensor.
Fully extend the nose piece of the new sensor. Use a small screwdriver in order to pry the nose piece out. Pry the nose piece out until the nose piece stops. The nose piece should move 6.5 mm (0.25 inch).
Install the new sensor into the sensor gear housing and tighten to 23 4 N m (17 3 lb ft).As the sensor is tightened, the nose piece contacts the gear face and slides back into the sensor body. After the sensor is fully tightened, the nose piece is at the correct air gap and no adjustments are required.
Inspect the sensor connector of the machine harness. Connect the machine harness to the sensor.
Check the sensor:It is easy to determine if the sensor is not working. The sensor's operation can be verified by checking the ground speed indicator.