Fuel Selector Valve
Posted: Fri Aug 27, 2021 7:40 pm
I'm having a chronic problem where I have a fuel seep from the fittings
on the fuel selector valve on my falco. A few years back, I replaced the
original valve with the newer version. The current fittings still appear
to be seeping.
I've been looking over the plans, but I don't see any drawings or part
specifications for the valve or its fittings. I'm seeking information
from other falco owners about their fittings.
Mine appears to have three aluminum fuel tubes connecting to the fuel
lines, each with a ferrule and a nut (with "crawford" on it). The nuts connect
to a male-to-male pipe fitting which threads into the female threads on the
fuel selector. The fittings appear to have some sort of thread locker/sealer
applied at the selector joint.
One seep appears to be on the top of the pipe fitting. I'm not sure where the
other fittings seep; is it at the ferrule, or the fitting threads?
In the past, I found fuel lube thread sealer worked for the fuel flow transducer
fittings, but that won't help of the problem is at the ferrule. Are they swagelok
and can they be reattached differently if that is the source?
I've now drained all fuel out of the aircraft and am considering what to do.
Not sure whether to replace the fittings, ferrules, tubing etc. Any suggestions?
Dave Barrett
on the fuel selector valve on my falco. A few years back, I replaced the
original valve with the newer version. The current fittings still appear
to be seeping.
I've been looking over the plans, but I don't see any drawings or part
specifications for the valve or its fittings. I'm seeking information
from other falco owners about their fittings.
Mine appears to have three aluminum fuel tubes connecting to the fuel
lines, each with a ferrule and a nut (with "crawford" on it). The nuts connect
to a male-to-male pipe fitting which threads into the female threads on the
fuel selector. The fittings appear to have some sort of thread locker/sealer
applied at the selector joint.
One seep appears to be on the top of the pipe fitting. I'm not sure where the
other fittings seep; is it at the ferrule, or the fitting threads?
In the past, I found fuel lube thread sealer worked for the fuel flow transducer
fittings, but that won't help of the problem is at the ferrule. Are they swagelok
and can they be reattached differently if that is the source?
I've now drained all fuel out of the aircraft and am considering what to do.
Not sure whether to replace the fittings, ferrules, tubing etc. Any suggestions?
Dave Barrett