TM 9-2330-384-14&P
Table 4-2. Unit Troubleshooting Procedures (Con't).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
If semitrailer is new or has been steam purged and the temperature is below
Step 5.
freezing, malfunction may have been caused by freezing in jet level sensor tubing or
in pilot valve on top of emergency valve. While troubleshooting, thawing will most
likely occur and no evidence of freezing may be discovered.
To safeguard against a recurrence of freezing, winterize bottom loading
system (see paragraph 4-84).
Step 6.
If cause of malfunction has still not been determined, remove pilot valve and repair,
Look for damage to diaphragm (see paragraph 4-83).
19. NO SHUTOFF WHEN BOTTOM LOADING AFTER TANK IS FULL
Check emergency valve control lever in cabinet to ensure that it is closed (see
Step 1.
emergency valve control lever set in the open position.
Push emergency valve control lever to close (see paragraph 2-2).
Remove pilot valve and replace pilot valve diaphragm (see paragraph 4-83).
Step 2.
Step 3.
Remove and repair emergency valve. Be sure to replace all preformed packings
(see paragraph 4-82).
PRECHECK SYSTEM
20. EMERGENCY VALVE DOES NOT CLOSE WITHIN TWO MINUTES OF START OF PRECHECK
CYCLE
WARNING
DO NOT breathe fuel fumes. They are toxic and can cause serious
medical problems. Failure to follow this warning may result in serious
injury or death to personnel.
Give IMMEDIATE medical attention to personnel exposed to hydrocarbon
or toxic vapors. Signs of distress are weakness, nausea, coughing or
intoxication, nosebleed or cramps, or other unusual symptoms.
Qualified personnel able to administer artificial respiration and simple
first aid must be present.
Open manhole fill cover (see paragraph 2-16). Check that precheck tubing is
Step 1.
properly connected to jet level sensor (see paragraph 4-70).
If precheck tubing is connected to jet level sensor, go to step 2.
If precheck tubing is disconnected, connect precheck tubing to jet level sensor
(see paragraph 4-70).
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