ENGINE AR-PRIMARY 3817574 - Caterpillar

41-MT Starting Motors (24 Volt Systems)
Illustration 7 g00810101
Illustration 8 g00716455
Pinion clearance check (1) Adjustment nut (2) Pinion drive housing (3) Pinion (X) Pinion clearanceWhen the solenoid is installed, make an adjustment of the pinion clearance. The adjustment should be made with the starting motor removed.
Disconnect the starting motor negative wire from the "G" ground terminal of the solenoid.
Connect the batteries to the solenoid per Illustration 7. The Illustration shows a 24 volt system with two 12 volt batteries that are connected in series to a starting motor. Connect four 8 volt batteries in series for a 32 volt system. Connect eight 8 volt batteries in series for a 64 volt system. Connect the positive side of the battery cable to the "S" terminal of the starting motor solenoid. Connect the negative side of the battery cable to the "G" terminal of the starting motor.
Temporarily, touch a wire from the "G" terminal to the "MTR" terminal. The pinion will shift to the crank position and the pinion will stay there until the battery is disconnected.
Push the pinion toward the commutator in order to remove free movement.
Measure the clearance (X) from the pinion (3) to the pinion drive housing (2). Pinion clearance (X) must be 9.10 0.8 mm (0.36 0.03 inch).
If the