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 - Page 116 of 180

TM 9-6920-430-14

Table 3-3. GPU Troubleshooting Guidance Chart (Continued)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

3. GPU STARTS BUT PRESSURE GAGE DOES NOT INCREASE

ABOVE 4000 PSIG AND COMPRESSOR CONTINUES TO

OPERATE.

ARE INLET AND OUTLET FITTINGS PROPERLY

SECURED?

SHUT DOWN GPU. IF LEAK CANNOT BE HEARD, CHECK FITTINGS USING LEAK

DETECTING LIQUID. SQUIRT LEAK DETECTING LIQUID AROUND INLET AND

OUTLET HOSE FllTINGS. IF LEAKS ARE DETECTED, CLOSE ARGON GAS SUPPLY

VALVE FULLY CLOCKWISE. OPEN OUTLET BLEED VALVE TO RELIEVE GAS,

THEN CLOSE OUTLET BLEED VALVE FULLY CLOCKWISE. TIGHTEN FITTINGS

IN ACCORDANCE WITH PARA. 3-13 AND 3-14

CAN GAS BE HEARD LEAKING FROM RUPTURE DISC (3)?

IF GAS IS LEAKING FROM RUPTURE DISC, TIGHTEN OR REPLACE RUPTURE DISC

IN ACCORDANCE WITH PARA. 3-23,

IS COMPRESSOR (4) PROPERLY FUNCTIONING?

IF ALL HOSE FITTINGS ARE PROPERLY SECURED AND NO LEAKAGE IS EVIDENT,

COMPRESSOR MAY HAVE LOST PRIME OR THE COMPRESSOR MAY BE FAULTY.

PERFORM THE PRIMING PROCEDURE IN SECTION Vl, BEFORE YOU ATTEMPT TO

REPLACE COMPRESSOR. (SEE PARAGRAPH 3-1 8).

3.1 GPU STARTS BUT OUTLET PRESSURE DOES NOT INCREASE

ABOVE INLET PRESSURE READING.

BOTH PRIME OR FAULTY COMPRESSOR(S), SEE PARA 3-11.1

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