HUB-IMPELLER 2988704 - Caterpillar

Illustration 1 g01097807
Connection for checking pinion clearance
(1) Connector to the motor
(2) Switch terminal
(3) Ground terminal
Install the solenoid without connector (1) from the MOTOR connections (terminal) on the solenoid to the motor.
Connect a battery, that has the same voltage as the solenoid, to the "SW" terminal (2).
Connect the other side of the battery to ground terminal (3).
Temporarily, connect a wire from the solenoid connection (terminal), which is marked "MOTOR", to the ground connection (terminal). The pinion will shift to the crank position and the pinion will stay there until the battery is disconnected.
Illustration 2 g01386517
(A) Pinion clearance
(4) Shaft nut
(5) Pinion
Push the pinion toward the end with the commutator in order to remove free movement.
Pinion clearance (A) must be 9.10 mm (0.358 inch).
In order to adjust the pinion clearance, remove the plug and turn the shaft nut (4).
After the adjustment is completed, install the plug over the nut (4) and install the connector (1) between the MOTOR terminal on the solenoid and the starting motor.