Maintenance Manual and Instruction Book, 16H, Big 4, 18 and ES2

ELECTRICAL SECTION.

94. ESSENTIAL MAINTENANCE. Battery. Inspect the battery regularly and keep acid level to the top of the separators by adding distilled water. UNLESS YOU DO THIS YOUR BATTERY WILL QUICKLY DE­ TERIORATE. Wiring. Keep all connections and terminals tight. See that the cables are clear of moving parts. Dynamo. Keep brushes and commutator clean. (Para. 93.) 95. LUBRICATION. The cam is lubricated by a wick, con­ tained in the contact breaker base, which must be given a few drops of thin machine oil about every 2,500 miles. To get at the wick, remove the spring arm carrying the moving contact and withdraw the screw carrying the wick. (Fig. 21.) When replacing the contact breaker com­ ponents see that the small backing spring is fitted immediately under the securing screw and spring washer, and that the bent portion faces outwards.

Magneto. Keep contact breaker clean. If necessary polish the contacts with fine carborundum stone or emery cloth and after­ wards wipe with cloth moistened with petrol. (Para. 88.) Occasionally check contact breaker opening (using gauge on ignition spanner). (Para. 87.) Replace high-tension cable if it becomes worn or perished. Head Lamp. Focus head lamp after fitting new bulb. (Para. 98.) The gauge should be a sliding fit. If there is an appreciable variation from the gauge, slacken the lock nut and turn the contact screw by its hexagon head until the gap is set to the gauge. Tighten the lock nut. 97. CONTACT BREAKER—CLEANING. Remove the contact breaker cover and examine the contacts. If they are dirty, they must be cleaned by polishing with a very fine carborundum stone or very fine emeiy cloth; afterwards wipe away any dirt or metal dust with a petrol- moistened cloth. Cleaning of the contacts is made easier if the spring arm carrying the moving contact is removed as described in paragraph 86. Examine the spring arm of the contact breaker and wipe away any rust. Adjust as described in paragraph 87. 98. H.T. CABLE. Should be 7 m/m. in diameter, rubber covered ignition cable. The cable must be replaced if the rubber insulation has perished or shows cracks and becomes brittle. To fit the new cable to the pick-up terminal, thread the knurled moulded nut over the lead, bare the cable for about J inch, thread the wire through the metal washer 87

IGNITION.

c o n t a c t s

c o n ta c t BREAKER

SECURING SCREW SCREW CARRYING LUBRICATION WICK SCREW SECURING CONTACT B R E A K S SPRING

Fig. 21.

96. ADJUSTMENT. "After dismantling the contact breaker in order to lubricate, the contact setting should be checked. Turn the engine until the contacts are fully opened and insert the gauge provided, .010 inch—.012 inch thickness, contacts. between . the