TM-5-4310-389-141.Remove nuts and washers from A terminals. Lift stator leads off studs and separate rear housing (17) fromstator assembly (15).2.Place stator on a clean work surface. Clean off any accumulated chips or debris that would potentially damagethe stator windings.3.Separate rear housing from rectifier diode terminals (19).h.Stator testing.1.Inspect stator for physical damage. Look for evidence of the rotor striking lamination, broken insulation, orforeign material that may impede the flow of cooling air.2.Check for discoloration of the winding insulating enamel. Discoloration of winding insulation enamel is a sign ofan overheated stator that may result in shorted or grounded wires. Replace stator if discoloration is evident.3.The stator assembly consists of three individual windings terminated in the delta type connections. Using anohmmeter or a test lamp, check for winding continuity between terminals A to B, B to C, and C to A (figure 4-65).There should be no continuity from any terminal to point D (laminations).i.Separate diode from rear housing. Remove hex nuts, lock washers, and insulators from alternator terminal studs.Remove negative brush lead from the negative rectifier heat sink. Carefully remove diode from the rear housing.Check rear housing for possible damage, paying particular attention to the bearing contacting surface. Replacehousing if this surface is damaged or worn. Replace, if defective.Figure 4-65. Stator Winding Test4-93
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