The International Cessna 170 Association

And my ‘1953 B-model is 25713... so your serial number makes little sense. It MAY be possible that your year-of-manufacture and your serial number and your logbooks are not ALL talking abou the same airplane? According to the info in “The 170 Book” (which may not be considered an “authority”)... se...

When part numbers are superceded...and then reassigned to a different part... an old flat washer PN used 60 years ago may now be assigned to a fuel pump mfr’d last year, etc. This is why Manual Revisions are made...and why 60-year old UN-approved “catalogs” are not to be used for maintenance. Where...

GAHorn wrote:Reese...you might be assuming we know which model 170 you own. WHAT model and serial number?

1955 170B Serial #25074

Hi all—

Does anyone know the part # on Aircraft Spruce for this hardware?

The Cessna parts catalog lists them as PK76XZ-8-10 & 0311001-27 but I can't find them on Aircraft Spruce.

Items 32 & 40

Actually each tank on an A or B can hold 21 gal, 42 total. 37 of that is usable. No telling how someone marked the stick. Or how they placed it in the tank to get consistent readings. The stick could have been marked very conservatively and the stick owner didn't care to measure his reserve fuel fo...

I have a dipstick which came with my plane, but the numbers don't add up.

When full, the dipstick reads 16.8 us gal. The dipstick is specific to the plane as it has the ident on it.

I thought the tanks were 37 gal total? 16.8 + 16.8 = 33.7.

Is this accurate or am I missing something?

Reece, Welcome! A lot can be done to prevent water intrusion at the filler neck without unthreading the neck. See SIL 170-172-19 and SE 70-28 . The screws in the moat originally had cork washers. I’d replace them with Parker 750-0002-10 ThredSeal washers. Instead of using Parker Seal-lub or silicon...

.... I’d suggest you replace the cap on that right tank with a serviceable vented cap and consider pulling the drain valve out for inspection. While it’s out...you might want to “flush” the tank to get all the water out. Hope this helps. Just to reiterate: I was suggesting only that you replace the...

First off, join the association. Save yourself alot of grief and get all the good info you need. Is Mike doing your annuals? Good guy but the info here would be very helpful for him as well. I know that plane somewhat, it was for sale in Vanderhoof a few years ago. Prior to that it might have been ...

Thanks all.

I will replace the drain valve with a stainless steel one to prevent the rust moving forward. I'll drain and clean out the tanks, but leave the hardware alone for now.

DaveF wrote:Do you mean a CAV-170?

Yes, that's exactly what I mean. Is this the exact one I should order?

Well... the FIrst thing to note is that the vented cap is required by AD note to be installed on the RIGHT tank....and the pic shows what appears to be a non-vented cap. As for the rusty water... I’m going to venture that your have rusted hardware at the fuel filler-neck and that old non-vented cap...

Hi everyone— I keep finding water in my 1956 170b's starboard fuel tank (not unusual for the wet coastal BC climate where I live). HOWEVER, the water I'm sumping from the drain is rust coloured. Does this mean my tanks are rusting, or there is some other part within the fuel tank which is rusting? I...