Brake Line Leak

[Andrew1967]

We use Dowtys everyday at work.

I'd say that there isn't enough of a flat sealing face on the brake hose for the Dowty to work.

New copper washers will be fine .. always have worked... always will

[1071bob]

I seem to remember making some special copper washers for the adaptor end, needed to be 11mm I.D and the standard 3/8" I.D for the other side of the Y piece. As Andrew pointed out the sealing area is narrow.

[Maddog]

You need two different sized copper washers, as 1071 Bob pointed out. I found this out the hard way when I inadvertently fitted two identical larger washers when rebuilding my 850. I could not get the pressure switch and two way union to seal, and had trouble with brake bleeding. When I pulled it apart, the bottom washer had buckled like a belleville washer. As soon as I fitted a correct sized smaller washer my problem was resolved.

[rogerotto66s]

The two washers are detailed below.
The smaller washer goes below the Union while the larger washer goes above the Union on the banjo nut.

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