TM-9-2330-330-14-P

SEMITRAILER, FUEL TANKER: 5000-GALLON, FUEL-DISPENSING, AUTOMOTIVE, M969A3

TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST)

NOVEMBER 2005

TM-9-2330-330-14-P - Page 771 of 1116

TM 9-2330-330-14&P

0168 00-19

VAPOR INTEGRITY TEST—Continued

0168 00

21.

Remove coupling assembly (8) from vapor vent line (10).

22.

Install coupling assembly (8) on discharge port of valve B (34).

23.

Install a closed cap on the now open vapor vent line (10).

24.

Open emergency valve A (25). Evacuate tank and piping system according to steps 3 and 5, then

continue with step 25.

25.

Wait 5 minutes to verify that vacuum reading on gage (35) remains stable. If vacuum does not

drop, go to step 34. If vacuum drops more than 0.5 in. wc, go to step 26.

26.

Reevacuate tank and piping system according to steps 3 thru 5; then continue with step 27.

27.

Close emergency valve A (25). Wait 5 minutes to verify that vacuum reading on gage (35)

remains stable. If vacuum does not drop, tank is leaking; go to 28. If vacuum drops more than 0.5

in. wc, piping system is leaking. Go to step 31.

28.

Locate leak in tank, check cleanout caps (1), manhole cover (2), precheck circuit and weld

seams.