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Bill Schlatterer
Joined: 09 Jan 2006
Posts: 195
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 Posted: Sun Apr 22, 2007 2:07 pm Post subject: Torque Values for Sensors and other not nuts and bolts stuf |
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Where or how would you find what to torque something like a Oil Temp Sensor? Big brass fitting, 7/8 socket size into the case just above the oil filter. Easy enough to get to with a crows foot and extension but how much do you tighten it? I'm thinking something like 100-125 inch pounds which feels like enough to flatten the copper gasket?
How about carb and fuel pump fittings ? ( I did find the AN values in the AC43 but nothing on the "banjo" part,…. Why do they call it a banjo fitting ? )
Is there any kind of rule of thumb for things which don't fall into the nut and bolt category? How about the synthetic Oil filler tube on an O-360 ? Takes a 1 1/8 wrench but it would look like you could twist it off if you're not careful? (Snug, then a little more, and wire it ??
All help appreciated, thanks
Bill S
7a Ark
Wired, cowled, canopied and "engining"
But nowhere near done ;-(
Do not archive [quote][b]
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Vanremog(at)AOL.COM
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| Posted: Sun Apr 22, 2007 4:44 pm Post subject: Torque Values for Sensors and other not nuts and bolts stuf |
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In a message dated 4/22/2007 3:09:59 P.M. Pacific Daylight Time, billschlatterer(at)sbcglobal.net writes:
| Quote: |
Where or how would you find what to torque something like a Oil Temp Sensor? Big brass fitting, 7/8 socket size into the case just above the oil filter. Easy enough to get to with a crows foot and extension but how much do you tighten it? I'm thinking something like 100-125 inch pounds which feels like enough to flatten the copper gasket? |
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I believe that the more common torque specs out in the industrial world are based on 75% of the yield strength of the weaker material, but that doesn't really help you does it?
I have an old Ford Aerospace (now Loral Space Systems still owned by Bernard Schwartz, the slime ball who sold/gave much of our space science to China) torque standard that I could dig out and maybe they have some guidance on this, but I would try to err on the side of caution with anything threading into cast aluminum. If you fail to get anything useful from the builders here over the next few days, e-mail me offline and I'll go thru my records to see if I can find the document.
GV (RV-6A N1GV O-360-A1A, C/S, Flying 844hrs, Silicon Valley, CA)
See what's free at AOL.com.
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