I'm a bit baffled that I haven't been able to get a consistent answer anywhere on the issues of torque values for various different types of hoses and fittings. Most people point me to the usual tables, which don't really answer my questions. Surely every builder has to figure this out...
1) For example, the VA-102 hose has a nut on the end that gets tightened onto an AN822-4D elbow. In this case, I would call the nut on the end of the hose "the nut", and I would call the elbow "the fitting". Is this correct terminology?
2) I asked Vans, and the reply was a reference to an Aeroquip technical document. Another generic table! Reading this page that was sent to me, I realise I'm also unclear on terminology. The document starts off by saying "....how tight should the connection between the fitting and the adapter be?". What is the "adapter"? When they say "fitting", which part are they refering to, the nut on the end of the hose, or the thing the nut gets tightened onto?
3) In cases like these hoses onto various steel and aluminum elbows and nipples, how do I determine the correct torque? Is it based on the material of the nut on the hose, or on the material of the elbow/nipple, or on both materials?
4) The nuts on the ends of my hoses (fuel and oil hoses) from Vans FWF kit are not blue. They are a silvery colour, and have a smooth shiney finish and so I would guess they are steel. Is this conclusive evidence that they are indeed steel, or could they be silvery shiney aluminum nuts on these hoses? I don't want to risk putting steel torque values on aluminum nuts!
1) For example, the VA-102 hose has a nut on the end that gets tightened onto an AN822-4D elbow. In this case, I would call the nut on the end of the hose "the nut", and I would call the elbow "the fitting". Is this correct terminology?
2) I asked Vans, and the reply was a reference to an Aeroquip technical document. Another generic table! Reading this page that was sent to me, I realise I'm also unclear on terminology. The document starts off by saying "....how tight should the connection between the fitting and the adapter be?". What is the "adapter"? When they say "fitting", which part are they refering to, the nut on the end of the hose, or the thing the nut gets tightened onto?
3) In cases like these hoses onto various steel and aluminum elbows and nipples, how do I determine the correct torque? Is it based on the material of the nut on the hose, or on the material of the elbow/nipple, or on both materials?
4) The nuts on the ends of my hoses (fuel and oil hoses) from Vans FWF kit are not blue. They are a silvery colour, and have a smooth shiney finish and so I would guess they are steel. Is this conclusive evidence that they are indeed steel, or could they be silvery shiney aluminum nuts on these hoses? I don't want to risk putting steel torque values on aluminum nuts!
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