APPENDIX D. ALTERNATOR TEST STAND PROCEDURES

TM 9-2920-258-30&P

APPENDIX D

ALTERNATOR TEST STAND PROCEDURES

SECTION I

SUN ELECTRIC CORPORATION MODEL AGT-9 OR AGT-9A

TEST STAND

D-1 General

The procedure in this section is performed to determine whether the Alternator is functioning in

accordance with manufacturer's specifications for ampere and voltage output when operated under

normal conditions. This procedure is for use with a Sun Electric Corporation Model AGT-9 or AGT-9A

test stand. For further information, refer to TM 9-4910-485-12.

D-2 Testing Procedure Without Regulator

Refer to TM 9-4910-485-12 for test stand general preparation and operation procedures. Use the

information contained below for testing procedures specific to the 180 ampere Alternator.

Preparation

1 Connect the test cable to the Alternator.

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

485-12.

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

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

5 Connect the cables and leads to the rectifier and binding posts of the side panel as shown in

Figure D-1.

6 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 15A 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 Set the tachometer circuit selector in the DIRECT DRIVE position.

F Snap the field circuit switch (36) in the MANUAL position.

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

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

D-1