Instruction manual

ELECTRICAL SERVICE

ELECTRICAL EQUIPMENT

LUCAS electrical equipment is fitted and this comprises three independent electrical

circuits, as follows :

(1) IGNITION—Magneto, High-tension wire and Sparking plug.

(2) CHARGING—Dynamo, Automatic Voltage Control Unit and Battery.

(3) LIGHTING AND ACCESSORIES—Lamps, Horn, Switches and wiring.

A LUCAS type N1-4 magneto is fitted (Type NR1 to competition models) and the

only service attention this requires is occasional lubrication of the contact breaker cam

and tappet, infrequent adjustment of the contact breaker points and complete servicing

at intervals of about ten thousand miles. To lubricate the contact breaker cam and

tappet it is necessary to remove the complete contact breaker from the magneto.

Illustration 30

Showing Contact Breaker

Remove contact breaker by :

Swing away the flat blade retaining the contact breaker cover.

Pull away the contact breaker cover.

Remove the screw E, Illustration 30, retaining the contact breaker spring arm A,

Illustration 30, to the contact breaker body and take away the backing spring F,

Illustration 31, and the spring arm E, Illustration 31. There is a spring washer under

the screw.

Unscrew the screw B, Illustration 30, carrying the lubrication wick and take away the

fibre insulating bush encircling the screw.

Straighten the tab on the lock washer D, Illustration 31, under the central screw H,

Illustration 30, retaining the contact breaker body A, illustration 31, to the armature

shaft and, with spanner 017251, remove the central screw.

Finally, lever off the contact breaker.

The above instructions do not apply to competition models fitted with Racing

Magnetos Type NR1.

IGNITION CIRCUIT