Fitting new brake master cylinder / reservoir

[Skub]

Dowty washers have a rubber seal in the inside diameter. We used them a lot to waterproof field units.

Yeah thats what the pic shows? Unless my eyes is playin' tricks?

Could be,hard to see.

[Mr. Dazzle]

Dowty seals...



IME it'd be highly unusual to see anything other than these on hydraulic banjo connections on most industrial kit. Theyre also fitted to plenty of car and aircraft connections IME, including suspension and gearbox stuff.

I've heard people say that brake fluid attacks them, but I'd be surprised if that's the case. As above, they're pretty much the default on most hydraulic connections and what's brake fluid if not hydraulic fluid?

That said, chemistry is a funny old mistress. But if the brake supplier sent 'em....

[Silly Car]

My easy bleeding tip:

Take the caliper off and pump the pistons almost all the way out. Bolt your new braided hose to the new m/c, undo the hose from the caliper and bolt the new hose to it. Fit the new m/c to the bars and push the pistons all the way in to the caliper. This will force the brake fluid into the new brake line and up into the m/c reservoir. Refit the caliper and bleed with new fluid.

Oh yes, new copper washers on both banjos

And even if you replace all of the washers with brand new ones, it isn’t beyond the realms of possibility that one will get pinched and have you scratching your head…


…thankfully a brew gave sufficient peace of mind to strip it out and check each washer in turn.

[Druid]

Yes, I remember the fun we had fitting braided hoses to your R1