TM 9-2330-384-14&P
Table 4-2. Unit Troubleshooting Procedures (Con?).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
WARNING
Compressed air used for clearing restrictions must not exceed 30 psi
(207 kPa). Wear protective clothing (goggles, face shield, and gloves) and
use caution to avoid injury to personnel.
Disconnect precheck tubing inside tank from jet level sensor and check valve (see
Step 5.
check for leaks.
If no restrictions or leaks are found, go to step 6.
If precheck tubing can be cleared of restrictions and no leaks are found,
connect precheck tubing to jet level sensor and check valve (see paragraph
If precheck tubing cannot be cleared of restrictions or if leaks are found,
replace tubing (see paragraph 4-72).
Inspect check valve for proper installation. Check valve must be installed with arrow
Step 6.
pointing to inside of tank (see paragraph 4-72).
If check valve is correctly installed, go to step 7.
If incorrectly installed, install check valve in proper direction (see paragraph
WARNING
Compressed air used for clearing restrictions must not exceed 30 psi
(207 kPa). Wear protective clothing (goggles, face shield, and gloves) and
use caution to avoid injury to personnel.
Remove check valve (see paragraph 4-72). Check for cracks or other damage.
Step 7.
Depress check valve and check for free movement. Direct compressed air through
inlet of valve; compressed air should pass through to outlet. Direct compressed air
through outlet of valve: no compressed air should pass through to inlet.
If check valve is damaged, replace (see paragraph 4-72).
21. EMERGENCY VALVE DOES NOT OPEN TO ALLOW BOTTOM LOADING AFTER PRECHECK
CYCLE COMPLETED
Purge tank (see paragraph 4-68). Remove emergency valve and pilot valve (see paragraphs
Repair emergency valve and pilot valve (see paragraphs 4-82 and 4-83).
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