The Ford Barn

qmdv · 10-28-2016, 12:26 PM

I am working on a long term project. A 32 roadster. About 20 years a go I purchased new brake cylinders and today I am doing some assembly. Turns out that my front cylinders do not have the inverted flare. It is the correct thread size but not flare inside. Is there an adapter or do I just use a flat brass ring?

Tim

rotorwrench · 10-28-2016, 01:50 PM

The 91A-2149 gasket was a copper washer that was used on early applications before Weatherhead inverted flare type fittings came along. The gasket was also used on the banjo bolt type fittings. The copper is annealed soft so it literally squishes it to a good tight seal. We still used copper washers on aircraft type spark plugs.

Bob C · 10-28-2016, 03:45 PM

Fronts don't use an inverted flare do they? The hose should screw into the wheel
cylinder and the inverted flare is on the other end of the hose where the metal
line hooks into it.

Bob

PeteVS · 10-28-2016, 05:52 PM

Yes, the fronts don't have the flare connection. It accepts the brake hose with a copper washer. The other end of the hose (where it's mounted to the frame) has an inverted flare connection that accepts a steel line on the right side of the car and the banjo bolt on the left side.

qmdv · 10-28-2016, 06:05 PM

I was confused cus back in 1975 I had a 29 roadster pickup that I converted to hydraulic. A friend gave me some front cylinders that bolted right up to 48 backing plates. They had the flare inside just like the rears. I also remember that they were 1 1/8 by 1 3/8 cups. A bit odd I guess. Thanks all. This sire is the best

Tim

PeteVS · 10-28-2016, 08:20 PM

Sponsored Links (Register now to hide all advertisements)

PS: I can't imagine why, but the 7/16 thread on the "non-flare" connections has a standard pitch of 20 threads per inch while the thread on the flared connections has a bastard pitch of 24. (For 3/16 tubing arrangements, both the "non-flare" and flared have the same thread size of 3/16-24.)

10-28-2016, 12:26 PM	#1
qmdv Senior Member Join Date: Dec 2012 Location: Payette, ID Posts: 936	hydraulic brakes I am working on a long term project. A 32 roadster. About 20 years a go I purchased new brake cylinders and today I am doing some assembly. Turns out that my front cylinders do not have the inverted flare. It is the correct thread size but not flare inside. Is there an adapter or do I just use a flat brass ring? Tim

10-28-2016, 01:50 PM	#2
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,440	Re: hydraulic brakes The 91A-2149 gasket was a copper washer that was used on early applications before Weatherhead inverted flare type fittings came along. The gasket was also used on the banjo bolt type fittings. The copper is annealed soft so it literally squishes it to a good tight seal. We still used copper washers on aircraft type spark plugs.

10-28-2016, 03:45 PM	#3
Bob C Senior Member Join Date: May 2010 Location: So Cal Posts: 8,755	Re: hydraulic brakes Fronts don't use an inverted flare do they? The hose should screw into the wheel cylinder and the inverted flare is on the other end of the hose where the metal line hooks into it. Bob

10-28-2016, 05:52 PM	#4
PeteVS Senior Member Join Date: May 2010 Location: FP, NJ Posts: 2,770	Re: hydraulic brakes Yes, the fronts don't have the flare connection. It accepts the brake hose with a copper washer. The other end of the hose (where it's mounted to the frame) has an inverted flare connection that accepts a steel line on the right side of the car and the banjo bolt on the left side. __________________ Don't never get rid of nuthin!

10-28-2016, 06:05 PM	#5
qmdv Senior Member Join Date: Dec 2012 Location: Payette, ID Posts: 936	Re: hydraulic brakes I was confused cus back in 1975 I had a 29 roadster pickup that I converted to hydraulic. A friend gave me some front cylinders that bolted right up to 48 backing plates. They had the flare inside just like the rears. I also remember that they were 1 1/8 by 1 3/8 cups. A bit odd I guess. Thanks all. This sire is the best Tim

10-28-2016, 08:20 PM	#6
PeteVS Senior Member Join Date: May 2010 Location: FP, NJ Posts: 2,770	Re: hydraulic brakes Sponsored Links (Register now to hide all advertisements) PS: I can't imagine why, but the 7/16 thread on the "non-flare" connections has a standard pitch of 20 threads per inch while the thread on the flared connections has a bastard pitch of 24. (For 3/16 tubing arrangements, both the "non-flare" and flared have the same thread size of 3/16-24.) __________________ Don't never get rid of nuthin!