4-32. ALTERNATOR ASSEMBLY TEST/REPLACE.
This Task Covers:
Tool Kit, General Mechanic's (Appendix B, Section III, Item I)
Multimeter (Appendix B, Section III, Item 1)
Lockwasher (Appendix H, Section II, Item 7).
Tags (Appendix E, Section II, Item 17).
Tape, Electrical (Appendix E, Section II, Item 18)
Belts Removed (para 4-31)
Unit shut down and cool.
Prevent electrical shocks or burns. Do not wear jewelry or dog tags when
working on electrical components.
Serious injury or death could occur by entanglement of clothing with moving
machinery. Do not wear loose clothing around alternator or belts
Alternator must be supported while removing alternator bracket to prevent
a. Test. (Refer to Figure 4-23).
After testing, disconnect negative battery terminal before removal of alternator
to prevent electrical short or damage to components.
Start diesel engine (para 2-9a.).
Using the multimeter, check voltage between terminals (1). Read out should be 24 volts DC or more. Replace
alternator (2) if no voltage is present or very low voltage is present.
Check alternator (2) for wear by moving pulley (3) up and down and in and out. Replace alternator (2) if any wear