6-4. 200 AMPERE ALTERNATOR (A0013036AA) TESTING AND REPAIR (Cont' )
Set 500 amp test stand as follows:
(a) DC ammeter load and starter selector
(b) DC ammeter field and battery charge selector
Field circuit switch
Turn 500 amp test stand master power switch and master load swtch to " N." Green lamp on 500
amp test stand must illuminate. Start the varidrive by actuating the start button. Set 500 amp battery
circuit selector to 24V DC, and the "GN" switch to " N".
When tachometer reaches 3000 rpm, test light should go out to
Observing DC output and tachometer rpm, set the 200 A switch of the load bank switches to " N". and
raise speed until tachometer reads 5000 rpm.
Snap the load bank master load switch in the "ON" position, and use the variable load control to apply
Readings should be 28.0 volts and 100-160 amps. If readings are not correct, repair alternator.
Prior to removal, tag leads for installation.
1. Scribe alignment marks (5) on cover plate (1), drive end housing (4), stator (2) and end housing (3).