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Torque Values for Sensors and other not nuts and bolts stuf

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Bill Schlatterer

Joined: 09 Jan 2006
Posts: 195

Posted: Sun Apr 22, 2007 2:07 pm Post subject: Torque Values for Sensors and other not nuts and bolts stuf

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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frank.hinde(at)hp.com
Guest

Posted: Mon Apr 23, 2007 6:33 am Post subject: Torque Values for Sensors and other not nuts and bolts stuf

My personal take is leave the torque wrench on the bench  and do it by feel...You'll spend a surprising amount of time torquing everything  this way.

  

 Frank



   From: owner-rv7-list-server(at)matronics.com  [mailto:owner-rv7-list-server(at)matronics.com] On Behalf Of Bill  Schlatterer

Sent: Sunday, April 22, 2007 3:08 PM

To:  rv7-list(at)matronics.com; rv-list(at)matronics.com;  RV7A(at)yahoogroups.com

Subject: Torque Values for Sensors and  other not nuts and bolts stuff ?

 

 

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]



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jimpercy(at)mindspring.co
Guest

Posted: Tue Apr 24, 2007 5:10 am Post subject: Torque Values for Sensors and other not nuts and bolts stuf

Those values can be found in a Lycoming overhaul  manual, except maybe the oil filler spout.  

  

 The crush type gaskets are not torqued.  They  are tightened until there is contact (finger tight) then further tightened a  specified number of degrees.  I don't have my manual handy so I don't  know the actual values.  The seam on the gasket goes on the engine  side.

  

 For the non-specified hardware like carb nuts, etc,  there is a chart of torque values based on diameter and thread pitch of the  fastener.  Again, I don't have the numbers available right now.  That  overhaul manual is probably a good investment if you don't have  it.

  

 Jim Percy

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