Figure 2-28. Ignition distributor. exploded view.

c. Cleaning and Inspection.

b. Disassembly. Refer to figure 2-28 and disassemble

(1) Clean all parts thoroughly and replace any

the distributor in numerical disassembly sequence.

damaged or worn parts. Do not clean the cap, dust

cover, rotor, condenser, insulator, or housing in de-

greasing compound.

(2) Repair slightly worn or pitted contact points

with a few strokes of a clean fine cut point file. Replace

contact points if worn or badly pitted.

(3) Check the breaker lever rubbing block for

excessive wear.

(4) Check the condenser for leakage. Replace it

if testing is impractical.

(5) Check the distributor cap and rotor for

cracks, burning of contacts, or carbon streaks.

d. Assembly. Reverse procedure in b above.

e. Installation. Reverse procedures in a above.

f. Adjustments. Refer to paragraph 2-14 for ig-

nition timing adjustment.

(1) Remove distributor cap rotor and dust cover.

(2) Rotate the crankshaft until the breaker lever

rubbing block ix on a high spot on the cam, thus open-

ing the contact, points to their maximum open position.

(3) Loosen the contact plate locking screw.

(4) Turn the eccentric adjusting screw to obtain

the correct gap of 0.022 inch and tighten the locking

screw.

(5) Recheck the gap after tightening the locking

screw.

(6) Install the dust, rover, rotor, and distributor

cap.

2-35. Spark Plugs

Spark plugs and spark plug wires must always be

maintained in good condition and kept. free of dirt

and grease. Replace any burned, cracked, broken, or

otherwise unserviceable spark plugs.

a. Removal.

(1) Disconnect wires at the spark plugs. Blow out

all dirt from the spark plug wells with compressed air.

(2) Use a spark plug socket wrench and remove

the spark plugs. Make sure the socket fits correctly to

avoid damaging the plugs.

(3) As each plug is removed make sure the copper

gasket is also removed.

b. Cleaning.

ME 3930-618-20/2-28

(1) Clean spark plugs by scraping excess carbon

9 Screw

cap

and lead deposits off the electrodes and insulator body.

10 Plate, breaker

Rotor

11 Lead

Cover

(2) Sand blasting does not clean between the

12 Grommet

Screw

electrodes and will ruin the glaze on the insulator

13 Shim

contact set

14 Washer

Screw

material if left in the sand blast machine too long.

15 Pin, spring

Bracket

(3) Using a file, file electrodes until square on flat

16 Coupling

Capacitor

at the gap surface.

Figure 2-28. Ignition distributor. exploded view.

(4) Clean exposed insulator surface of all grease,

dirt or paint.

2-35