TM 5-4240-501-14PIGNITIONFlywheel Type - External BreakerFig. 32 - Armature Air GapADJUST ARMATURE TIMINGModel Series 19D, 23DFig. 33 - Model Series 19D, 23DRemove FlywheelUse puller 19203 or 19068, running puller screws intoholes tapped into flywheel. Continue to tighten screwsuntil flywheel loosens, Fig. 30.NOTE: Use flywheel nut to protect crankshaft threads.Set points at .020" (0.51 mm) gap. Position flywheel oncrankshaft taper. Flywheel key screw should be fingertight. Flywheel nut may be put on loosely, Fig. 33.Fig. 34 - Flywheel KeyRotate flywheel clockwise until breaker points are justopening (flywheel key drives crankshaft while doing this).Fig. 35. Use a timing light.Fig. 35 - Flywheel TimingRotate flywheel slightly, counterclockwise, until edge ofarmature lines up with edge of flywheel insert, Fig. 36.(Crankshaft must not turn while doing this.) Tighten keyscrew. Tighten flywheel nut. See Table 1. Set armatureair gap at .022"-.026" (0.56-0.66 mm).Fig. 36 - Flywheel Timing210
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