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Circuit breaker contact assembly (1 '¿) should be replaced, it contact point pressure is not within prescribed limits of 14 to 18 oz. Check pressure with a spring gauge. The scale should be hooked to the breaker lever at an angle of 90 degrees with the point surface and reading taken just as contacts break. Excessive pressure causes rapid wear of rubbing block, cam and contacts. Insufficient pressure will permit high speed bounce which will, in turn, cause arcing and burning of the contacts and missing of the engine.

Contact faces must seat squarely against each other. If bent, square up by bending plate on levers.

Inspect lip of cam seal (21) and replace it if worn or rough. Also replace seal if there is evidence of oil leakage into circuit breaker arm.

When installing contacts, be sure contact faces seat squarely against each other. Adjust gap as previously described in "Adjusting Circuit Breaker Points."

Check flyweight springs, and if bent or stretched, replace them. When installing, be sure that bent end of each spring is hooked through bottom of hole, and that upper looped end grips groove in pin tightly. See Figure 5-21.

Lubricate breaker cam with a trace of Harley-Davidson "Anti-Seize," Part No. 96632-77, when contact set is replaced or every 5000 miles. Also remove cam and lubri cate shaft with the same. Replace cam in correct position so that it engages both flyweights and flat side is next to roll pin (19).

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