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 con-
tact 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.
MAGNETO MODELS
Electrical Equipment
Lucas electrical equipment is fitted and this comprises three indepen-
dent electrical circuits, as follows:
(1) IGNITION—Magneto, High-tension wires, Sparking plug and Cut-
out switch.
(2) CHARGING—Dynamo compensated voltage control unit and
Battery.
(3) LIGHTING AND ACCESSORIES—Lamps, Horn, Switches and
Wiring.
To remove contact breaker. Take out the hexagon-headed screw from the
centre of the contact breaker, then pull the assembly off the tapered shaft.
When refitting, ensure the projecting key on the assembly engages with
the keyway cut in the armature shaft. Incorrect assembly will affect igni-
tion timing.
Adjustment every 3,000 miles. Remove the contact breaker cover and
turn the engine until the contact points are fully opened. Check the gap
with a gauge having a thickness of .012" (spanner 015023 has a gauge of
this thickness as an integral part of it). If the setting is correct the gauge
should he a sliding fit, but if the gap varies appreciably from the gauge it
should be adjusted by releasing the fixed contact plate securing screw and
using a screwdriver.
Cleaning every 5,000 to 6,000 miles. Take off the contact breaker cover
and remove the contact breaker. If the contact points are burned or
blackened, clean them with a fine carborundum stone or with very fine
emery cloth, and afterwards wipe away any dust or dirt with a petrol-
moistened cloth. After replacing the contact breaker check the point gap
and, if necessary, re-set it.
Remove the high tension pick-up (held by swinging spring clip), wipe
clean and polish with a fine dry cloth. The high tension pick-up brush
must move freely in its holder.
If it is dirty, clean with a cloth moistened with petrol.
On the SR-1 magneto fitted to all 1957 Touring models, the contact
breaker is exposed by removing the moulded end cover secured with 3
captive screws.
To remove the contact breaker lever, slacken the nut securing the end
of the contact breaker spring which is slotted to permit easy withdrawal
of the moving contact lever.
If dirty, oily or burnt, contact points must be cleaned with a fine car-
113
To Next Page
Loading...
