Table 2-2. Direct/General Support Troubleshooting

55-1730-229-34

320A0-MME-000

35C2-3-473-2

1730-34/1

Direct/General Support Troubleshooting (continued)

Table 2-2.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

AGPU DRIVES IN REVERSE DIRECTION (continued)

36.

If voltage is not present, the forward switch S1 in the

speed/direction control assembly, or the wire between switch

and TB4-6 is defective. Disconnect battery. Check wiring

and repair if defective. If wiring is good, check forward

switch S1, and replace if defective. If voltage is still not

present, replace speed/direction control assembly (TM 55-

1730-229-12, paragraph 4-118).

Set power switches off and disconnect battery. Check wires between

Step 2.

TB4-6 and relay 2K1, G18A20N between relays 2K1 and 2K2, and cable

G13A2 on relay 2K1.

Replace any defective wires or cables.

If all cables and wires are good, replace relay 2K1.

(TM 55-1730-229-12, paragraph 4-116).

AGPU DRIVES IN BOTH DIRECTIONS BUT MOTION IS JERKY.

37·

Set power switches off and disconnect battery. Test diodes TB2-CR1 and CR2

(see TM 55-1730-229-12, table 4-2, malfunction 82).

Replace defective diodes.

If diodes are good, check wire between diodes and ground

(figure FO-8).

Section III.

GENERAL MAINTENANCE

2-4. GENERAL MAINTENANCE. This sec-

components can be accomplished with soap

tion provides or references non-standard

and water, followed by a fresh water

maintenance procedures for repairs that

rinse and wipe down with clean cloths.

would otherwise be repeated several

Stubborn grease and grime may require

times throughout the chapters.

Clean

cleaning with solvent P-D-680.

electrical components by vacuuming and/

2-5. GENERAL MAINTENANCE,

FRAME AND

or wiping with a cloth dampened with

HOUSING.

isopropyl alcohol.

b. Welding. The frame and housing

a. Cleaning. Cleaning of

the

frame and housing, and propulsion system

is constructed of 1010/20 steel; weld

2-24