Distributor Service

Fig 1 Exploded view of American Motors distributor used with solid state ignition system:

TRIGGER WHEEL & SENSOR, REPLACE

1. Remove distributor cap and rotor, Fig. 5.
2. Remove trigger wheel with a suitable gear puller. Use a flat washer to prevent gear puller from contacting inner shaft. The trigger wheel may also be removed by using two screwdrivers topry trigger wheel upward. Remove pin.
3. Remove sensor retainer and washers from pivot pin on base plate, then theretaining screws.
4. On all distributors, remove ground screw from harness tab.
5. Remove sensor assembly from distributor housing.
6. Reverse procedure to assemble.

VACUUM UNIT, REPLACE

1. Disconnect vacuum hose.
2. Remove vacuum unit attaching screws and the vacuum unit, Fig. 5. Itis necessary to tilt the vacuum unit to disengage the link from the sensor pinand also loosen the base plate screws for clearance.
3. Reverse procedure to install. If a new vacuum unit is installed, it must becalibrated as follows:
a. Insert an appropriate size Allen wrench into vacuum hose tube oforiginal vacuum unit. Rotate Allen wrench clockwise and note thenumber of turns required to bottom the adjusting screw.
b. Insert Allen wrench into vacuum hose tube of replacement vacuumunit. Turn the Allen wrench clockwise until the adjusting screw isbottomed, then rotate Allen wrench counterclockwise the number ofturns noted in the previous step.