Quantcast INSPECT OIL COOLER CORE (cont)

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TM 9-2815-226-34-2
WARNING
MURIATIC ACID (A FORM OF HYDROCHLORIC ACID) IS EXTREMELY HARMFUL
TO SKIN.  WEAR PROTECTIVE CLOTHING WHEN HANDLING.  PROTECT EYES
WITH GOGGLES.
h. Immerse cooler core in solution of 1 part muriatic acid and 9 parts water after adding 1 lb (0.45 kg) of oxalic acid
and 0.01 gal. (88 ml) of pyridine to each 5 gal. (19 1) of acid.
i. Remove cooler core when foaming and bubbling stops. This generally takes 30 to 60 seconds.
j. Immerse cooler cor e in 5 percent solution of sodium carbonate. This neutralizes acids.
k. Remove cooler core when bubbling stops.
l. Pressure flush all tubes with warm water.
m. Flush tubes with clean, light oil after cleaning complete.
n. Steam clean inside of housing, cover, and support.
WARNING
COMPRESSED AIR USED FOR CLEANING PURPOSES WILL NOT EXCEED 30 PSI
(207 KPA).  USE ONLY WITH EFFECTIVE CHIP GUARDING AND PERSONAL
PROTECTIVE EQUIPMENT (GOGGLES, SHIELD, GLOVES, ETC.).
P-D-680 SOLVENT IS POTENTIALLY DANGEROUS.
AVOID PROLONGED OR
REPEATED CONTACT WITH SKIN.  KEEP AWAY FROM FLAME OR EXCESSIVE
HEAT.
o. Clean all other parts in solvent and dry with compressed air.
p. Check cooler core tubes for leakage.
(1) Secure cooler core to tool no. 3375253 tub e bundle tester.
(2) Immerse cooler core in water.
(3) Apply 30 psi (207 kPa) air pressure to tester end plate.
(4) If bubbles are observed, mark cooler core for repair.
(5) Cut off air pressure and remove cooler core from fixture.
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