ALTERNATOR GP-CHARGING 2020115 - Caterpillar

Pinion Clearance Adjustment (Delco-Remy)
When the solenoid is installed, adjust the pinion clearance. Make the adjustment with the starter motor removed.Bench test and adjust the pinion clearance at installation of solenoid as follows:1. Install the solenoid without connector (1) from the MOTOR 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 battery to ground terminal (3).
CONNECTIONS FOR CHECKING PINION CLEARANCE
1. Connector from MOTOR terminal on solenoid to motor. 2. SW terminal. 3. Ground terminal.
PINION CLEARANCE ADJUSTMENT
4. Shaft nut. 5. Pinion. 6. Pinion clearance.4. MOMENTARILY flash a jumper wire from the solenoid terminal marked MOTOR to the ground terminal. The pinion will shift into cranking position and will remain there until the battery is disconnected.5. Push pinion towards commutator end to eliminate free movement.6. Pinion clearance (6) is .33 to .39 in. (8.3 to 9.9 mm).7. To adjust clearance remove the plug and turn shaft 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 .005 to .030 in. (0.13 to 0.76 mm). 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 clearance, connect the solenoid to a 12 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.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 .020 to .050 in. (0.51 to 1.27 mm).
PINION CLEARANCE ADJUSTMENT
2. Adjusting nut. 3. Distance.3. Remove the plug. Turn the adjusting 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.Use the procedure that follows to check and adjust the pressure regulating valve.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 the regulator outlet.4. Put air pressure in the line or tank.5. Check the pressure.6. Adjust the pressure regulating valve to 100 to 150 psi (690 to 1030 kPa).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 starting motor.Each engine application will have to be inspected to get the most acceptable starting results. Some of the factors that affect regulating valve