Preparation

TM 9-2920-258-30&P

Preparation

Connect the test cable to the Alternator.

Make sure that all controls on the test stand are positioned as shown on Table 2-1 of TM 9-4910-

485-12.

Mount the direct drive Alternator to the low speed driving head.

Place the rectifier in the rectifier cooling chamber of the test stand.

Connect the cables and leads to the rectifier, regulator and binding posts of the side panel as

shown in Figure D-2.

Before starting the varidrive, place the test stand switches and selectors in the following positions:

A Place the DC ammeter load and starter selector (1) in the 500A position.

B Set the DC ammeter field and battery charger selector (2) in the 30A position.

C Determine that the DC voltmeter range selector (5) is in the 50V position.

D Check to see that the DC voltmeter circuit selector (6) is in the RECT GEN position.

E Snap the field circuit switch (36) in the REGULATOR position.

F All load switches (34) in the OFF position.

G Determine that the ground polarity switch (33) is in the negative (-) position.

H Place the AC ammeter range selector (9) in the 400A position.

I Determine that the AC voltmeter range selector (11 ) is in the 50V position.

J Make sure the field current control (41) is fully counterclockwise.

K Ascertain that the battery selector (31) is in the OFF position.

D-4