Fuel valve rebuild and manual mistake WARNING

How to keep the Cessna 170 flying and airworthy.

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JSwift
Posts: 63
Joined: Tue Feb 14, 2017 3:01 am

Re: Fuel valve rebuild and manual mistake WARNING

Post by JSwift »

During the annual we started just last week we found that fuel does not shut off fully when in the off position.

I think it’s time for a rebuild of the selector valve on my ‘52 B model SN 20746. I’ve already ordered the McFarlane kit with the O rings and gasket and read this entire post plus George’s article twice. I’m heading to the hangar now to do the “push test”. If it passes that we may defer the rebuilding of the valve until warmer weather allows working outside or at least with my hangar door fully open. If anyone has some recent learning to pass on please chime in.

I agree with Karl’s comment that the learning provided here is worth much more than the price of admission.
N2594D, 1952 170B #20746
Near Enfield, CT
Let's go fly!
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MoonlightVFR
Posts: 624
Joined: Sun Jan 02, 2005 5:55 pm

Re: Fuel valve rebuild and manual mistake WARNING

Post by MoonlightVFR »

I have never had indication to service my Fuel Valve. B s.n.26433.
If I ever come to that the rebuild will be triple checked.

The subject "manual mistake WARNING" should give us all Pause. I had an incident once (rear seat passenger reached down and shut fuel OFF) while landing . I/A talked me out of safety wiring it ON. There are more stories out there.


I can envision Bruce reading the IPC and realizing the IPC is wrong -- I will do it MY WAY. Thank You Bruce.

Go to YOUTUBE watch Frank Sinatra sing MY WAY 15 million views.
gradyb, '54 B N2890C
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c170b53
Posts: 2527
Joined: Mon Apr 22, 2002 8:01 pm

Re: Fuel valve rebuild and manual mistake WARNING

Post by c170b53 »

You will especially if you turn it to off every flight. And likely you’ll be stranded, so I’d recommend getting the gasket and o’ring kit from McFarland aviation
Jim McIntosh..
1953 C170B S/N 25656
02 K1200RS
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c170b53
Posts: 2527
Joined: Mon Apr 22, 2002 8:01 pm

Re: Fuel valve rebuild and manual mistake WARNING

Post by c170b53 »

DAD8CCAE-B057-4A64-B12A-829A08AACF94.jpeg
Found this gasket on my workbench and thought it might give others a reason to look at their installs. Check out the cracks in the rubber, I’m thinking this gasket could be 30-35 years old.
The large hole was intact and tore when the gasket was removed but the bottom edge had totally eroded away between the mating surfaces.
Jim McIntosh..
1953 C170B S/N 25656
02 K1200RS
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