A.J.S. 16, Instruction Book

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Smear the surface of the cam very lightly with Mobilgrease No. 2, or, if this is not
available, clean (SAE 30-40) engine oil may be used.
Squeeze a little grease into the felt wick.
Place a spot of clean engine oil on the contact breaker pivot.
Remove the central fixing bolt and inject a small amount of clean engine oil into the
hole thus exposed. When the fixing bolt has been replaced and the engine run for a
few minutes, the oil will be forced out over the automatic advance mechanism by
centrifugal force.
Cleaning—every 6,000 miles
Examine the contact breaker. The contacts must be free from grease or oil. If they
are burned or blackened, clean with fine carborundum stone or very fine emery cloth,
afterwards wiping away any trace of dirt or metal dust with a clean petrol moistened
cloth. Cleaning of the contacts is made easier if the contact breaker lever carrying the
moving contact is removed.
To remove the moving contact, unscrew the nut securing the end of the spring and
remove the nut, spring washer and bush. Lift the contact breaker lever off its pivot.
After cleaning, check the contact breaker setting.
C O N T A C T BREAKER SETTING
The contact breaker gap should be checked after the first 500 miles running and subse-
quently every 3,000 miles. To check the gap, turn the engine over slowly until the
contacts are seen to be fully open, and insert a feeler gauge between the contacts.
The correct gap setting is 0·014"—0·016".
If the gap is correct, the gauge should be a sliding fit. (Make sure the gauge is clean
and oil free before use.)
To adjust the gap, keep the engine in the position giving maximum contact opening and
slacken the screws securing the fixed contact plate. Adjust the position of the plate
until the gap is set to the thickness of the gauge, and tighten the securing screws.
LUCAS COIL I G N I T I O N . ALTERNATOR T W I N S
The ignition equipment comprises a Model MA6 coil with a Model I8D2 distributor
assembly. The contact breaker with automatic advance mechanism is mounted in the
distributor body.
The distributor has a flange fitting retained to the crankcase by one bolt and two nuts.
The drive is by gear pinion on the distributor shaft which is located by a parallel pin
passing through the distributor shaft and the pinion. The parallel pin is retained by a
circlip encircling the boss on the pinion.
An efficient oil seal encircles the distributor shaft to prevent oil entering the contact
breaker compartment with an " O " ring on the body for oil retention. A bronze
thrust washer is fitted between the pinion and the distributor body. A clamp incor-
porated in the flange mounting, when released, will allow the distributor to be moved
for ignition timing. The rotation is anti-clockwise.
CLEANING
To be carried out every 6,000 miles. Remove and clean the distributor cover, which
must be handled with care. Pay particular attention to the spaces between the metal
electrodes in the cover, and check that the small carbon brush moves freely in its
holder.
LUBRICATION
Lift off the rotor arm, and unscrew the two screws securing the contact breaker base
plate. Remove the base plate and lubricate the automatic advance mechanism with
clean engine oil, paying particular attention to the pivots.
Re-fit the base plate and rotor arm.
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