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TABLE 6-1
(Cont'd)
Item
Problem
Cause
Action
Needle valves
Leak at gland
Loose packing
Tighten gland nut.
Worn packing
Repack
Scored seating surface
1. Replace.
* 2. Overhaul, replacing
parts as necessary.
Test and reissue.
Piping threads All valves,
fittings and pipe
Leak
Cross threaded(not badly
damaged)
Disconnect, chase threads
to remove burrs. Dope and
reconnect.
Badly damaged threads
Replace, or if feasible, cut
short, cut off or ream and
rethread.
All aluminum pipe, fittings,
valves
in
contact
with
ferrous metals
Corrosion
adjacent
to
ferrous contact -
Electrolytic corrosion
Replace if leaking. Replace
if pitting beyond 1/16 inch.
NOTES:
1. Qualified and properly equipped shops required on items marked *
2. Items that are not repairable in field, or that are of questionable serviceability, should be passed up
through maintenance channels for disposition.
6-28
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