AN Brake Line Fittings & Hoses

[hammer408]

Im to the stage of installing the brake lines and brake hoses in my 9A. My questions are rather straight forward.

1st - What type of "dope" can you put on the AN fitting threads. I know for the fuel line fittings, I used "fuel lube", and I was told NOT to use this for brake fittings.

Obviously when it comes to putting together the nylon fittings and tubing, NOTHING is used, CORRECT ????

2nd - Im thing about making my own brake lines rather than use Van's pre-made lines that go from the rudder pedal to the firewall support. I want to use Aeroquip hoses, but not sure if I should get Aeroquip 701 SS, which is used for the fuel lines, or go with Aeroquip 666, which is a medium pressure Teflon hose with SS outer cover !!!

Any help or suggestions welcome

Hank
Pittsburgh, Pa
N918HB (reserved)

[Christopher Murphy]

I was just making a list of parts to replace the plastic/nylon lines on my plane.

I used the nylon and plastic lines and fittings supplied with the kit on my RV-4. It has about 350 hours on it. The plastic tubing was a constant problem at the elbow fitting into the brake caliper. It was a constant seep I think due to the heat cycles. I replaced the brass hardware with AN fitting and aeroquip hose to aluminum tube on the gear legs. It still has plastic tube from brake cylinder to the gear leg. This has worked well for last 100+ hours.

Now the lines from the resevoir to the cylinders has been giving me trouble. I tighten the elbow on the cylinder and 6 months later it is loose again.( and leaking)

I am going to install aeroquip hose and AN fittings on the resevoir end of things.

This is the one area of the kit I was not impressed with.

good luck

[craigvince]

I know they're not sponsors of VAF yet (Hint, Hint Brett?), but I can't say enough good things about the brake lines Bonaco made up for me. Their fittings are flawless. This setup cost me somewhere around 100 bucks if I rememer right; WELL worth it!

[LifeofReiley]

I did what Craig did... mine are on the way. Thanks Craig!

[G-force]

For NPT threads, use something like Locktite PST 567. It is rated for fuel, oil, hydrolic fluid, etc. It also acts as an antiseize which is really important if your assembling any stainless fittings.

[hammer408]

I appreciate all responses, but I plan on fabricating my own hoses, so I am still interested in feedback on either using Aeroquip 701 SS or should I go with a teflon lined SS hose like Aeroquip 666 or Stratoflex 124.........

Thanks

Henry

[Sam Buchanan]

Originally Posted by hammer408

I appreciate all responses, but I plan on fabricating my own hoses, so I am still interested in feedback on either using Aeroquip 701 SS or should I go with a teflon lined SS hose like Aeroquip 666 or Stratoflex 124.........

Thanks

Henry

I made up new brake lines yesterday out of #4 Aeroquip teflon stainless braided hose and AN fittings. I think the teflon is the only hose recommended for use with brake fluid. This is the same hose as "666", I bought mine at a speed shop so it is branded as TFE racing hose.

The hoses look great and should last the lifetime of the plane.

[Rick S.]

I was set on building my own hoses too....I did it for all the FWF and other lines...but for those stainless -3 fittings and hose I could not do it cheaper buying the materials and they came already pressure tested...so unless your sold on doing them yourself...it's not like an interior...they are brake lines..I won't tell

[craigvince]

Yes, they use the 37 deg flare. They use only real AN fittings.

[az_gila]

Originally Posted by Sam Buchanan

I made up new brake lines yesterday out of #4 Aeroquip teflon stainless braided hose and AN fittings. I think the teflon is the only hose recommended for use with brake fluid. This is the same hose as "666", I bought mine at a speed shop so it is branded as TFE racing hose.

The hoses look great and should last the lifetime of the plane.

Sam.. did the speed shop sell the Teflon hose version with the plastic outer cover?

gil A