3406E and 3456 Industrial Engines Caterpillar

Illustration 1	g00434728
Left side view (1) Speed-timing sensor

Illustration 2	g00434865
Right side view (2) Backup speed-timing sensor

1. Remove the speed-timing sensors from the front housing. Check the condition of the plastic end of the speed-timing sensors for wear and/or contaminants.

2. Clean the metal shavings and other debris from the face of the speed-timing sensors. Use the procedure in the Service Manual in order to calibrate the speed-timing sensors.

Refer to the Service Manual for more information on the speed-timing sensors.