TM 5-4240-501-14PIGNITIONFLYWHEEL TYPE—INTERNAL BREAKERRemoving Breaker CoverCare should be taken when removing breaker cover, toavoid damaging cover. If cover is bent or damaged itshould be replaced to insure a proper dust seal.Breaker PointsBreaker point gap on all models is .020" (0.5 mm).Breaker points should be checked for contact and forsigns of burning or pitting. Points set too wide willadvance spark timing and may cause kick back whenstarting. Points gapped too close retard spark timing anddecrease engine power.Remove Breaker PointsBreaker point assemblies of style shown in Fig. 13 areremoved by removing condenser and armature wiresfrom breaker points clip. Loosen adjusting lock screwand remove breaker point assembly.Breaker point assemblies of style shown in Fig. 14 areremoved by loosening the screw holding the post. Thecondenser on these models also includes the breakerpoint. The condenser is removed by loosening the screwholding the condenser clamp.Fig. 13 - Breaker Point AssembliesFig. 14 - Breaker Point AssembliesCheck Breaker Point Plunger HoleFig. 15 - Checking Breaker Plunger HoleIf the breaker point plunger hole becomes wornexcessively, oil will leak past the plunger and may get onthe points, causing burning. To check, loosen breakerpoint mounting screw and move breaker points out of theway. Remove plunger. If the flat end of the 19055 pluggauge will enter the plunger hole for a distance of 1/4"(6.35 mm) or more, the hold should be rebushed: Fig.15.Install Breaker Point Plunger BushingTo install the bushing, it is necessary that the breakerpoints, armature, crankshaft and starter be removed.Use reamer 19056, to ream out the old plunger hole.See Fig. 16. This should be done by hand. The reamershould be in alignment with the plunger hole. Drive thebushing 23513, with driver 19057 until the upper end ofthe bushing is flush with the top of the boss. Fig. 16.Finish ream the bushing with reamer 19058. All reamingchips or dirt must be removed.Fig. 16 - Installing Breaker Plunger Bushing25
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