CHAPTER 2. ALTERNATOR TROUBLESHOOTING

TM 9-2920-258-30&P

CHAPTER 2

ALTERNATOR TROUBLESHOOTING

REPAIR PARTS, SPECIAL TOOLS, TEST MEASUREMENT AND

SECTION I

DIAGNOSTIC EQUIPMENT (TMDE) AND SUPPORT EQUIPMENT

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COMMON TOOLS AND EQUIPMENT

For authorized common tools and equipment, refer to the Modified Table of Organization and

Equipment (MTOE) applicable to your unit.

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SPECIAL TOOLS

500-amp test stand.

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REPAIR PARTS

Repair parts are listed in Appendix B of this manual.

TROUBLESHOOTING

SECTION II

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PURPOSE

This chapter contains detailed troubleshooting information and procedures for locating and

correcting malfunctions in the various component parts of the Alternator.

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TROUBLESHOOTING

PROCEDURES

a After the Alternator has been received, inspect the Alternator as follows:

1 Check if spline shaft turns. If it does not, check if drive end housing has been

seated correctly. Check bearings and make sure there is no obstruction between

spline shaft and air shroud.

2 Grasp spline shaft and see if it can be moved up or down, or to either side. If

spline shaft does move, remove and replace worn components as required (ref

Chapter 3, Disassembly Step 6).

3 Check pins that they are not burned, bent or broken, or pushed back into jumper

connector (ref Chapter 3, Disassembly Step 19). Replace if burned, bent or

broken, and pull back into proper position if pushed back.

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