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#1
February 13th 05, 09:45 PM
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Proper Torque for Fuel Fittings
I'm to the point of installing the fuel fittings on the fuel tanks on
my RV-8A project. I'm a little confused about what torque to set my wrench at when installing the fitting. The fitting that goes through the tank rib and 3/16" reinforcement plate is an AN833-6D elbow with an AN924-6D nut on the outside. There are also a pair of -4D fittings for the vent line which will soon be mounted as well. The only torque chart that I'm ever able to find is one for AN bolts/nuts. Since these are aluminum fittings, I don't dare torque them to the same values. Any assistance would be greatly appreciated. Steve 
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#2
February 13th 05, 10:20 PM
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I was taught to use no more than 10-12 ft/lb of torque for AN aluminum
fittings, but why not call Van's to get the answer from the source? "Steve Waltner" wrote in message ... I'm to the point of installing the fuel fittings on the fuel tanks on my RV-8A project. I'm a little confused about what torque to set my wrench at when installing the fitting. The fitting that goes through the tank rib and 3/16" reinforcement plate is an AN833-6D elbow with an AN924-6D nut on the outside. There are also a pair of -4D fittings for the vent line which will soon be mounted as well. The only torque chart that I'm ever able to find is one for AN bolts/nuts. Since these are aluminum fittings, I don't dare torque them to the same values. Any assistance would be greatly appreciated. Steve
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#3
February 14th 05, 07:45 AM
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Juan Jimenez wrote:
I was taught to use no more than 10-12 ft/lb of torque for AN aluminum fittings, but why not call Van's to get the answer from the source? "Steve Waltner" wrote in message ... I'm to the point of installing the fuel fittings on the fuel tanks on my RV-8A project. I'm a little confused about what torque to set my wrench at when installing the fitting. The fitting that goes through the tank rib and 3/16" reinforcement plate is an AN833-6D elbow with an AN924-6D nut on the outside. There are also a pair of -4D fittings for the vent line which will soon be mounted as well. The only torque chart that I'm ever able to find is one for AN bolts/nuts. Since these are aluminum fittings, I don't dare torque them to the same values. Any assistance would be greatly appreciated. Steve That's a lot of difference between 75 in pounds and 120-144 inch pounds (10-12 ft/pounds). Definetly check with Van's but if you can't wait go with the more conservative. (i'd wait!) John
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#4
February 15th 05, 12:42 PM
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"John" wrote in message ... Juan Jimenez wrote: I was taught to use no more than 10-12 ft/lb of torque for AN aluminum fittings, but why not call Van's to get the answer from the source? "Steve Waltner" wrote in message ... I'm to the point of installing the fuel fittings on the fuel tanks on my RV-8A project. I'm a little confused about what torque to set my wrench at when installing the fitting. The fitting that goes through the tank rib and 3/16" reinforcement plate is an AN833-6D elbow with an AN924-6D nut on the outside. There are also a pair of -4D fittings for the vent line which will soon be mounted as well. The only torque chart that I'm ever able to find is one for AN bolts/nuts. Since these are aluminum fittings, I don't dare torque them to the same values. Any assistance would be greatly appreciated. Steve That's a lot of difference between 75 in pounds and 120-144 inch pounds (10-12 ft/pounds). Definetly check with Van's but if you can't wait go with the more conservative. (i'd wait!) John Yes, it is, which is one reason I told him to call Van's and ask and get it from the source.
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#5
February 13th 05, 11:46 PM
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"Steve Waltner" wrote The only torque chart that I'm ever able to find is one for AN bolts/nuts. Since these are aluminum fittings, I don't dare torque them to the same values. Any assistance would be greatly appreciated. Steve This is such basic information, I don't know why anyone needs to ask stuff like this. Everyone knows, you tighten it until it strips, then back off 1/4 turn. I'll go back to my room, now. g Sorry, I had to do it! -- Jim in NC
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#6
February 14th 05, 12:25 AM
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"Steve Waltner" wrote in message ... I'm to the point of installing the fuel fittings on the fuel tanks on my RV-8A project. I'm a little confused about what torque to set my wrench at when installing the fitting. The fitting that goes through the tank rib and 3/16" reinforcement plate is an AN833-6D elbow with an AN924-6D nut on the outside. There are also a pair of -4D fittings for the vent line which will soon be mounted as well. The only torque chart that I'm ever able to find is one for AN bolts/nuts. Since these are aluminum fittings, I don't dare torque them to the same values. Any assistance would be greatly appreciated. Steve Look up MS21344, should get you there...
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#7
February 14th 05, 12:47 AM
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"Blueskies" wrote in message m... "Steve Waltner" wrote in message ... I'm to the point of installing the fuel fittings on the fuel tanks on my RV-8A project. I'm a little confused about what torque to set my wrench at when installing the fitting. The fitting that goes through the tank rib and 3/16" reinforcement plate is an AN833-6D elbow with an AN924-6D nut on the outside. There are also a pair of -4D fittings for the vent line which will soon be mounted as well. The only torque chart that I'm ever able to find is one for AN bolts/nuts. Since these are aluminum fittings, I don't dare torque them to the same values. Any assistance would be greatly appreciated. Steve Look up MS21344, should get you there... http://assist.daps.dla.mil/quicksearch/
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#8
February 16th 05, 12:05 AM
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"Blueskies" wrote in message . com... "Blueskies" wrote in message m... "Steve Waltner" wrote in message ... I'm to the point of installing the fuel fittings on the fuel tanks on my RV-8A project. I'm a little confused about what torque to set my wrench at when installing the fitting. The fitting that goes through the tank rib and 3/16" reinforcement plate is an AN833-6D elbow with an AN924-6D nut on the outside. There are also a pair of -4D fittings for the vent line which will soon be mounted as well. The only torque chart that I'm ever able to find is one for AN bolts/nuts. Since these are aluminum fittings, I don't dare torque them to the same values. Any assistance would be greatly appreciated. Steve Look up MS21344, should get you there... http://assist.daps.dla.mil/quicksearch/ http://assist.daps.dla.mil/eAccess/l...8/83/40046.PD9 See if that works...
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#9
February 14th 05, 03:12 AM
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Steve: I've got the torque charts at work and will pass on the correct
numbers when I get in. The torque values are different for the various size fittings, with type of service and fitting material both having an impact on the value. Craig C.
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#10
February 14th 05, 03:25 AM
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Managed to locate the set that I had at home.
#6 Bulkhead nut is 75 inch-pounds +/- 5% for clean and dry threads. #4D nuts get 75 inch-pounds +/- 5% also Craig C.
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