Section IV. REPAIR OF BATTERY POWER SUPPLY PP-6607/ VVG-1 (A78)

TM 9-1240-369-34

(4) Lubricate PFN gasket (30) by applying a

b. Inspect for PFN all circuit cards, and all modules

thin. Uniform, film of grease. MIL-G-4343, to the high

for corrosion; check all screws for worn threads check all

point on the bead of the gasket. Do not apply so much

gaskets for deterioration; and check all machined

grease that it fills the grooves on either side of the bead.

surfaces for conditions that may prevent alinement with

Apply by hand to both sides of the gasket.

mating parts.

c. Check electrical wiring for chafed electrical

(5) Install new PFN by performing steps (1)

thru (3) in reverse order.

wiring for chafed or broken wires and bad solder

connections.

d. Inspect machined sealing surfaces for surfaces

3-6. Inspection of Power Supply Control Unit (A77).

for debris or excessive lubricant that may prevent proper

a. Inspect the general condition of all parts. Check

sealing.

for wear or other conditions indicating deterioration.

Section IV. REPAIR OF BATTERY POWER SUPPLY PP-6607/ VVG-1 (A78)

(1) Remove 10 screws (1), 10 washers (2),

3-7. Disassembly of Battery Power Supply Unit (A78)

access cover (3) and gasket (4). Inspect screws and

The battery power supply unit is to be

washers for damage and replace as necessary.

disassembled only to the point where the damaged

(2) Lubricate new gasket (41 by applying a

components can be removed and replaced. During

thin, uniform, film of grease. MIL-G-4343, to the high

disassembly. it is recommended that disassembled

point on the bead of the gasket. Do not apply so much

items be indexed in order of removal. Assembly can

grease that it fills the grooves on either side of the bead.

then be accomplished by replacing items in reverse

Apply by hand to rubber insert on both sides of gasket.

index order. After any repair. the battery power supply

(3) Install new gasket in the reverse order of

unit must be purged with dry nitrogen gas in accordance

step (1).

with TM 9-2350-230-12.

a. Replacement of Gasket (see fig. 3-3).

3-7