1942 - 1947 Chevrolet Shop Manual



	the opposite direction on the armature shaft. The tension of the starter pedal return spring holds the pinion out of mesh with the flywheel while the engine is operating. DISASSEMBLY OF STARTING MOTOR Before a starting motor is removed from an engine, certain tests should be made to be sure that the starting motor is in need of repair. First check the battery. If the specific gravity is below 1.175, the battery is discharged and should be recharged. Check the battery ground connection at the frame and clean and tighten if necessary. Check the battery terminals. Dirty terminals result in poor connection between the battery and the electrical units. They should be cleaned regularly and the battery washed off with a solution of bicarbonate of soda and water. Remove the starting motor switch and check the contacts to be sure that they are clean and not burned or corroded. If after making the foregoing inspections the starting motor still does not function, it should be removed and disassembled. To disassemble-remove the starting motor switch, commutator cover band, through bolts and rear housing. Remove the field coil to brush lead machine screws and remove the commutator end frame assembly and then remove the armature. To remove the drive mechanism, first remove the bolt on which the shift lever pivots and then remove the shift lever and drive mechanism. After the starting motor has been completely disassembled. Fig. 44, wash all parts, except the overrunning clutch, in clean gasoline or cleaning solvent. TESTING STARTING MOTOR PARTS Field Coil Test for Continuous Circuit	*12-21* Place the test prod leads on the field coil leads, Fig. 45. If the test lamp lights, the field coils are OK. If the test lamp does not light, there is an open circuit in one or both of the field coils. Field Coil Test for Ground

		Fig. 46-Field Coil Test for Ground Place one test prod lead to frame and the other to the field coil lead, Fig. 46. If the test lamp does not light the field coils are OK. If the test lamp lights, one or both field coils are grounded. Individual Field Coil Test for Ground Break soldered connection between the two field coils and test each one separately replacing the field coil found to be grounded. Field Coil Leads Inspect the field coil leads where they are soldered at the starting switch terminal to be sure that they are tight. Armature Test for Ground



	Fig. 45-Field Coil Test for Continuous Circuit	F!g. 47-Armature Test for Ground