TM 5-4240-501-14PIGNITIONMAGNETRONTMINSTALLING MAGNETRONT" MODULEModule is installed in reverse order of removal. Notethat module retainer must be on back side of coillaminations, Fig. 8. Use Permatex’" or similar sealant tohold ground wires in place, Fig. 8Ignition timing is controlled by the location of the flywheeland crankshaft keyways on aluminum engines. On castiron engines, refer to page 9.Fig. 8 -Starter Clutch On flywheels of 6-3/4" (171 mm) diameteror less, use flywheel holder 19167, to keep flywheel fromturning. On rope starter engines, the 1/2" diameterthread flywheel nut is left handed and the 5/8" diameterthread is right handed. Fig. 9. Starter clutch used onrewind and wind-up starter has a right hand thread. Fig.10. Remove clutch using P/N 19114 starter clutchwrench or P/N 19244 or 19161 1/2" square drive starterclutch wrench.For flywheels or larger diameter place a block of woodunder flywheel fin to prevent flywheel turning whileloosening nut or starter clutch. Clamp engine basesecurely. Fig. 11.Fig. 9 Loosen Flywheel, Rope Starter (1/2" Dia.Threads)Figure. 10 - Loosening FlywheelRewind Starter and Wind-up Starter EnginesFig. 11 - Loosening Large FlywheelsRemove FlywheelSome flywheels have two holes provided for use of aflywheel puller. Use puller shown in Table 1. Leave nutloose on threads of crankshaft for puller to bear against,Fig. 12. Small cast iron flywheels do not require aflywheel puller. See note below.Fig. 12 - Removing FlywheelNOTE: To remove small cast iron flywheels withoutpuller holes. support the flywheel with a gloved hand.exerting an upward pull. Using a rawhide hammer.strike the outside rim of the flywheel with a sharp blow.Several blows may be required on an extremely tightflywheel.NOTECare is required not to damage the flywheel fins.magnets or ring gear224
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