Dr.Looping
Member
Does anyone have a tip which spare needs to be ordered from Vans?
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leaky fuel-selector - which spare?
- Thread starter Dr.Looping
- Start date
That looks like Van's standard 4-way selector valve. It's not expensive:
Fuel Valve, Parker FP 4 Way
Standard brass-on-nylon 90/180 degree 4 port valve
Dr.Looping
Member
Thank you. My Intention is to just replace the o-ring but before disassembling, I would like to know if there is a suitable replacement available.That looks like Van's standard 4-way selector valve. It's not expensive:
Fuel Valve, Parker FP 4 Way
Standard brass-on-nylon 90/180 degree 4 port valvestore.vansaircraft.com
View attachment 84737
Anything special or just a new one? Fuel-resistant for sure.
Make sure the one you have has an outlet port on the bottom.
If not, the one posted above is not a replacement.
If not, the one posted above is not a replacement.
andoman
Well Known Member
Yes, viton.
No need to remove the valve from the aircraft.
They are standard O rings at any auto parts store. To replace O rings, just back off the handle screw (don't remove it yet) and pull up on the handle to release it from the shaft taper. (The handle must be removed from the shaft to replace O rings) Then unscrew the top nut and pull the core out. One O ring will be under the nut, and the other is on the shaft.
If you ever find the valve hard to turn, just reach under the handle with two fingers and lift the handle and turn.... this releases the cone.
They are standard O rings at any auto parts store. To replace O rings, just back off the handle screw (don't remove it yet) and pull up on the handle to release it from the shaft taper. (The handle must be removed from the shaft to replace O rings) Then unscrew the top nut and pull the core out. One O ring will be under the nut, and the other is on the shaft.
If you ever find the valve hard to turn, just reach under the handle with two fingers and lift the handle and turn.... this releases the cone.
Tracer 10
Well Known Member
MS29513-011 is the O-Ring under the cap. If your tanks are full you will need to drain about 1/2 of each tank to get the fuel level below the selector valve or you will have a geyser of fuel coming out when you unscrew the large nut under the handle. Once removed polish the cone with 400 grit. Clean thoughly and lube VERY LIGHTLY with Fuel Lube. Others have suggested Krytox grease works better.
Dan Horton thread:
Fuel Valve O-Ring
I had previously lubricated the standard Vans brass valve with a very thin film of EZ Turn. It was fine initially, but over time it became difficult, I think more so than a valve assembled dry. So, given its non-performance, coupled with the bad habit of clogging fuel controls, henceforth I'm...
vansairforce.net
I have found Marvels Mistry Oil added to the fuel (0.4 oz to every gallon) prevents fuel selectors from getting stiff or leaking over time. And, it also keeps the top-end in great shape! I know -- Mike Busch at Savvy Aviation doesn't think much of MMO, but after using it myself in three different airplanes over years of use, I know it works! And, I'm betting that Mike Busch has never actually tried it.
