Hydraulic drum brake

[Chris Launders]

I have a manx lookalike brake plate with twin slave cylinders and two braced shoes believed to be escort,had it about twenty years but never used it yet.regarding master cylinder sizes i have a 1980 900 DUCATI the front brake was ok but after a few years i made up a hydraulic clutch and fitted a pair of Kawasaki GPZ 900 master cylinders-WOW big difference, hard braking with just two fingers so different diameter/ratio cylinders can have a big effect

 

[Howard]

Knowing how many people that have had cracked brake drums on vincents I would be very wary as to putting any kind of hydraulic pressure on them unless you made them of a more substantial material. If they are set up correctly, and this does take sometime, there is no problem with a standard set up.

Hi John, I've got Laverda drums on the Egli.
I know what you mean about Vin drums though, I've got a cracked one in the garage - I seem to remember George Brown cracked it on Gunga Din - I wonder what section of Ebay I can sell it on

H

 

[Diogenes]

For one way of doing it, see:

http://autos.groups.yahoo.com/group/stevenageworld/

http://autos.groups.yahoo.com/group/stevenageworld/files/Brakes/Drum Brakes/

Files > Brakes > Drum Brakes

Vin.Hydro.Brakes.1.pdf
17 JULY 1958

BUT it is worth considering in detail exactly what to do when you get a puncture on a wet dark night.
Those QD wheels with mechanical brake operation on the original design have merit in that situation.

 

[Black Flash]

Hydraulic drum brakes are quite common on BMW racing outfits, sitter and kneeler ones. They use both systems, with the pump lever ( not radial due to the the classic racing regulations) and the hybrid system with the cable going to an hydraulic "pump" somewhere on the chassis.
If the system was inferior to the cable operated drum, I am sure ALL racers would convert backwards.
So there must be something good about it, at least when going racing.
Just a thought.
Bernd

 

[Chris Launders]

How about this I spotted on facebook

 

[Pushrod Twin]

Vcool!!

 

[roy the mechanic]

Rather neat. As standard the cable would have squeezed the arms together. Now the are working backwards. so the inside of the cams are doing the work. I expect the hydro power makes up for this oversight. Roy.

 

[ClassicBiker]

That is very cool is any relevant info about it known? Thanks for posting.
Steven

 

[b'knighted]

Rather neat. As standard the cable would have squeezed the arms together. Now the are working backwards. so the inside of the cams are doing the work. I expect the hydro power makes up for this oversight. Roy.

How does the nut on the far right of the operating rod do anything but squeeze the arms together? The piston must be to the left of fluid inlet. Neither way allows much movement.

 

[Chris Launders]

It was on Tony Foals site there's a whole thing about braking.