Help / Advice making stainless lines

GimpyStang

Founding Member
Oct 8, 2001
1,232
0
0
Des Moines, IA
I've made some smaller -4 lines for oil before, and those were cake.

I'm currently assembling some -8 lines to finish up my fuel system. I've gotten a couple done, but it took me like 2 HOURS. Surely someone has some advice on an easier way to shove the hose nut (the thing you screw the end into) onto the hose? I've tried 30w oil, moly lube and nothing seems to help much.

I've watched my dad put these together as a kid before for his airplanes, and they were NEVER THIS HARD.

I talked to him tonight he said the most important thing was to match brands of AN plumbing hardware with manufactorers of the hose... because they all manufactor the stuff slightly different. Also he mentioned he had a set of mandrels for his press to assist in putting the threaded colar/adapter side on, but thats not where my difficulty lies.

---

My current method is just as every site on the internet suggests. I wrap the braided hose in electrical tape and then use a chop saw. The braid is clean and not frayed at all. I then unwrap the tape and put the sleeve/nut into the vice and with a twisting motion try to push it in with all of my might... no dice.

Some people have told me some hose ends are threaded on the inside to assist in getting the sleeve over it. IF this is true, WHAT BRAND are they... because I want to use that.

Any advice / tricks you guys have are appreciated!

Oh and FYI the hose ends are Aeroquip. The braided line itself ... I'm unsure. It all came from a local circle track shop.

Sorry for a the long post, frustrated.
 
From my aircraft mechanic days, I never saw a sleeve that didn't have a shallow, coarse, LH thread to screw the hose into.

I went out to my shop and found an old fitting. I am looking at an Aeroquip 516-40 fitting, and it has the LH thread, but it doesn't start until you get the hose deep into the bell.