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At 11:20 AM 10/25/2005, Robert Swinney wrote:
he noticed that the core of his gascolator quick drain was laying on
the ground (Curtis type).
Curtis used to sell replacement seals for these drains. It is not an
O-ring; it is a tiny flat washer. An O-ring will not work right as
it will jam in the sealing area. The reason they stopped selling
them is that the rivet-like attachment that holds the metal washer on
the end, which is what keeps the core from exiting the aircraft, was
failing after high time. The solution: no repairs, replace.
The threads on these units are pipe threads. No locking agent is
required or necessary. A little fuel lube helps seal things, but I'm
willing to bet that the one on WRB's plane was never properly
tightened. Had it been, the sealant would not have washed out even
if it was soluble as the threads would have sealed the gas in
sufficiently by themselves, and the torque on the threads would have
held it in place in the absence of any solvent. Only if there was
"space" between the threads, occupied by sealant, could the loss of
sealant have allowed it to back out.
John Cooper
Skyport Services
PO Box 249
4996 Delaware Tnpk
Rensselaerville, NY 12147
518 797-3064
Fax 518 797-3865
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