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Table 4-2. Troubleshooting - Continued
MALFUNCTION
TEST OR
INSPECTION
CORRECTIVE ACTION
7. Drain Assembly
leaks
- Check for loose or missing hexagon
head bolts.
- Check O-Ring between drain fitting and
tank metal face for nicks, breaks and
distortion.
- Tighten or replace bolts as necessary.
- Remove and replace O-Ring (Ref . para. 4-11).
8. Drain Valve
Assembly
leaks
- Check for leaks around valve stem.
- Check quick-disconnect couplings for
leaks.
- Check coupling fitting NPT connections
for leaks.
Tighten valve stem B-Nut.
- Remove and replace quick disconnect gaskets,
(Ref. paragraph 4-11).
- Remove fitting and replace Teflon tape, (Ref.
paragraph 4-11).
9. Gate Valve Assembly
leaking
- Check for loose or missing hexagon
head bolts and nuts.
- Check for loose valve stem B-Nut.
- Tighten or replace nuts and bolts as necessary.
- Tighten B-Nut.
4-7
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