IMPELLER-PUMP 7C1067 - Caterpillar

37-MT Starting Motors (12 Volt Systems)
Illustration 1 g00810014
Connections for pinion clearance check for 12 volt system (1) Battery (2) Starting motor (3) Solenoid mounting bolt
Illustration 2 g00810097
(4) Adjustment nut (5) Pinion drive housing (6) Pinion (7) Retainer (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 terminal connector for the starting motor "MTR" from the solenoid.
Connect the battery to the solenoid per Illustration 1. The illustration shows a 12 volt system with a battery that is connected in series to a starting motor. Connect the negative side of the battery cable to the solenoid mounting bolt (3) of the starting motor (2).
Temporarily, touch a wire from the solenoid mounting bolt terminal (3) 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 (6) to the pinion drive housing (5). Pinion clearance (X) must be 1.0 0.8 mm (0.04 0.03 inch).
If the clearance is not correct, remove the plug on the shift lever housing (5). Turn the adjustment nut (4) until the clearance