Brake failure switch on dual circuit master cylinder.

[mikey]

Hello everyone, glad the forum is now working again after it took a short holiday.

I would like to know if it is a Victorian engineers requirement to have a brake failure switch on a dual circuit master cylinder.

I have seen after market dual circuit master cylinders that do not have the switch and do not have provisions for one.

I have never experienced a failure in either of the two circuits in any car I have ever driven but would imagine that it would be felt in the pedal right away and would not need an idiot light to tell you something is wrong, is this a fair assumption?

I don't have an old master cylinder floating around to pull apart to see how the switch is activated. Is it a limit type switch that is pushed by something or is it a true pressure differential type?

Thanks,  M

[smithy]

hi mikey, i think your best bet would be to contact vic roads and see what they say.

for what its worth, the commodore master i am running in mine has the brake fail switch and i have ben told that if it is on the unit then i has to be incorporated, i will wire it from the cylinder but the wires will terminate somwhere out of site so the unit will appear to be opperational.

i still reckon the best brake fail indicator is when you car just wont stop, your brakes dont work


dean

[FC427]

Hi Mikey don't know about VIC but in NSW it is not a requirement I had an engineer tell me he wanted it then when I quizzed him about it he later said it was not compulsory just a good idea and not one of the ADR I had to comply to  so I never wired it and I still got my engineer certificate.......FC427.......

[mikey]

Agree it is is a good idea in principal, but a bit pointless in my opinion almost like having a little light telling your engine has just stalled due to running out of fuel, yeah DUUUUHHHH   

Would personally be quite happy to run without one.

Might have to speak to the authority to get the OK as I would really hate to buy a master without switch and have to swap it over..

Thanks everyone,     M

[mcl1959]

When I was at H/S we stocked recoed HQ brake fail switches for engineers requirements. They are a pressure differential switch and all lines are routed through it.

Ken

[mikey]

Ken thanks for that,
                            One of my original questions was going to be "are there remote pressure switches available" ? but I thought I had asked enough for the time being.

At least if I do get a master without switch it is still possible to plumb a switch into the system somewhere.


Regards  M