4-68. PURGING TANK (Con't).
(29) Push emergency valve and vapor vent control levers in cabinet to close (see paragraph 2-2).
(30) Close two vent caps (11). Close manhole fill cover (12) (see paragraph 2-16).
d. CHEMICAL PURGING (ALTERNATE METHOD)
DO NOT perform chemical purging unless TB 43-0212 has been thoroughly
read, understood, and all safety procedures followed.
Refer to TB 43-0212 for information on chemical purging.
If repair to tank is scheduled, remove emergency valve after purging (see paragraph 4-82).
Even with tank drained and purged, approximately 3-4 cc of fuel remain inside piston cavity of
emergency valve and create a safety hazard.
Follow instructions in subparagraph c, STEAM CLEAN PURGING, to dry precheck and jet level
When emergency valve is installed after tank repair is complete, winterize bottom loading