KIT-ENGINE OVERHAUL 4503948 - Caterpillar

Pinion Clearance Adjustment (Delco-Remy)
When the solenoid is installed, make an adjustment of the pinion clearance. The adjustment can be made with the starter motor removed.
Connection For Checking Pinion Clearance
(1) Connector from MOTOR terminal on solenoid to motor. (2) SW terminal. (3) Ground terminal.1. Install the solenoid without connector (1) from the MOTOR connections (terminal) on solenoid to the motor.2. Connect a battery, of the same voltage as the solenoid, to the terminal (2), marked SW.3. Connect the other side of the battery to ground terminal (3).4. Connect for a moment, a wire from the solenoid connection (terminal) marked MOTOR to the ground connection (terminal). The pinion will shift to crank position and will stay there until the battery is disconnected.
Pinion Clearance Adjustment
(4) Shaft nut. (5) Pinion. (6) Pinion clearance.5. Push the pinion toward the commutator end to remove free movement.6. Pinion clearance (6) must be 8.3 to 9.9 mm (.33 to .39 in.).7. To adjust pinion clearance, remove plug and turn nut (4).Pinion Clearance Adjustment (Prestolite)
There are two adjustments on this type motor. They are end play for the armature and pinion clearance.End Play For The Armature
The correct end play for the armature is 0.13 to 0.76 mm (.005 to .030 in.). The adjustment is made by adding or removing thrust washers on the commutator end of the armature shaft.Pinion Clearance Adjustment
Connections For Adjustment Of The Pinion Clearance
(1) Stud.1. To adjust the pinion distance, connect the 24V solenoid to a 12 volt battery (12V solenoid to a 6 volt battery) as shown. For a short moment, connect a wire from the "motor" stud of the solenoid to the stud at (1) in the commutator end. This moves the solenoid and drive into the cranking position.Disconnect the wire. The drive is in the cranking position until the battery is disconnected.
Pinion Clearance Adjustment
(2) Adjustment nut. (3) Distance.2. Push the drive toward the commutator end of the motor to eliminate any slack movement in the linkage and measure the distance between the outside edge of the drive sleeve and the thrust washer. The distance (3) must be 0.51 to 1.27 mm (.020 to .050 in.).3. Remove the plug. Turn the adjustment nut (2) in or out as necessary to get this distance.4. Install the plug.Air Starting System
Pressure Regulating Valve
Pressure Regulating Valve (Typical Illustration)
(1) Adjustment screw. (2) Regulator inlet. (3) Regulator outlet.To check and adjust the pressure regulating valve, use the procedure that follows:1. Drain the line to the pressure regulating valve or drain the air storage tank.2. Disconnect the regulator from the starter control valve.3. Connect an 8M2885 Pressure Gauge to regulator outlet (3).4. Put air pressure in the line or tank.5. Check the pressure.6. Adjust the pressure regulating valve as shown in Chart For Air Pressure Setting.7. Remove the air pressure from the line or tank.8. Remove the 8M2885 Pressure Gauge and connect the air pressure regulator to the line to the air starter motor.Each engine application will have to be inspected to get the most acceptable starting results. Some