TM-9-6920-430-14

COOLANT RECHARGING UNIT, TRAINING GUIDED MISSILE SYSTEM M80 AND CHARGER, BATTERY PP-7309/T

TECHNICAL MANUAL; OPERATOR’S AND ORGANIZATIONAL DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL

AUGUST 1980
TM-9-6920-430-14

  TM-9-6920-430-14 - Page 129 of 180

TM 9-6920-430-14
d. Carefully disconnect (turning counterclockwise) the hose fitting at the gas supply bottle
adapter (4) using an 11/16-inch wrench to hold and a 9/16-inch wrench to loosen.
e. Unlock the chain lock and remove chain from around gas supply bottle valve (1) housing.
f. Carefully disconnect (turning counter-clockwise) the hose fitting at the GPU inlet connector
(5) using a 9/16-inch wrench to loosen.
g. Unlock the chain lock at the GPU eyebolt.
h. Requisition a replacement inlet flexible hose. Remove the protective plug and its chain and
safety chain from each end of the original hose and install onto the replacement hose.
i. Connect one end of the hose to the GPU inlet connector (5) using a 9/16-inch wrench to
tighten.
j. Lock the chain to the GPU eyebolt.
k. Connect other end of the hose fitting onto the gas supply bottle adapter (4) using a 3/4-
inch wrench to hold and a 9/16-inch wrench to tighten.
l. Wrap the chain twice around the gas supply valve (1) housing and latch the chain lock to a
chain link.
m. Close the INLET BLEED valve (3) fully clockwise.
n.
o.
Be sure that the hose fittings and safety chains are properly installed before perform-
ing the next step.
Slowly open the argon gas supply valve (1) two complete turns counterclockwise.
Squirt leak detecting liquid around the two hose fittings. Visually check for gas bubbles in-
dicating leakage. If leaks are detected, close argon gas supply valve (1) fully clockwise. Open
INLET BLEED valve (3) to relieve gas; then close INLET BLEED valve (3) fully clockwise.
Tighten fitting and repeat steps
n
and o above.
p. Slowly open the INLET BLEED valve (3) counterclockwise until you hear gas escaping.
Bleed for 10 seconds. Then, close the INLET BLEED valve fully clockwise.
q. Close the gas supply valve (1) fully clockwise.
r. Slowly open the INLET BLEED valve (3) counterclockwise until you hear gas escaping.
Close the INLET BLEED valve (3) fully clocktwise after gas has vented.
Change 1
3-67


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