Reason for tandem master cylinder for breaking
Reason for tandem master cylinder for breaking
(OP)
I have a question
With a duel master cylinder, one for back and one for front, I thought this was for safty. If a line breaks, you have the other circuit to brake.
It does not work.
Am I wrong in thinking that its design is for a safty reason?
I have had several brake lines break when I was young with old cars, salted roads in Ontario, and a heavy foot.
I find that when a line breaks, my foot goes to the floor: period.
come to think of it. If a person forgets to pump up the front calipers after a pad replacement, same thing - foot to the floor
In my head I can not see why it would not work.
2 separate cylinders to front and back.
They do have an internal seal, don't they??
Signed
Confused
With a duel master cylinder, one for back and one for front, I thought this was for safty. If a line breaks, you have the other circuit to brake.
It does not work.
Am I wrong in thinking that its design is for a safty reason?
I have had several brake lines break when I was young with old cars, salted roads in Ontario, and a heavy foot.
I find that when a line breaks, my foot goes to the floor: period.
come to think of it. If a person forgets to pump up the front calipers after a pad replacement, same thing - foot to the floor
In my head I can not see why it would not work.
2 separate cylinders to front and back.
They do have an internal seal, don't they??
Signed
Confused





RE: Reason for tandem master cylinder for breaking
On our race cars, the dual master setup is for balancing the brake performance, front to rear and not necessarily to preclude total failure. If one of the masters, either front or rear, were to fail as I go into a very high speed corner...well, let's just say I'd rather not find out.
Rod
RE: Reason for tandem master cylinder for breaking
To be sure, the braking action will be terrible, especially if you happen to lose the fronts......but short of a panic stop, you should be able to safely stop the vehicle.
Rod, you could have had the same thing I ran into, the rears were already not working. Since they really do very little in overall braking, I hadnt noticed them, and when the fronts lost a line, needless to say it was interesting.
RE: Reason for tandem master cylinder for breaking
Rod
Oh yeah, I made it, just!
RE: Reason for tandem master cylinder for breaking
Regards
Dave
RE: Reason for tandem master cylinder for breaking
I remember reading that book in 1978 when I was 13.
School bored me so I took a book.
Thanks for the replies
RE: Reason for tandem master cylinder for breaking
You, like I have lived a charmed life.
RE: Reason for tandem master cylinder for breaking
RE: Reason for tandem master cylinder for breaking
I can say from personal experience with 30's era Buicks that the hydraulic systems of today do not differ greatly from those used in the 20's and 30's---often still identical, as in the case of my 37 Roadmaster...I used late model Dodge truck wheel cylinder parts !!!
For those of you interested in the history of brakes...
http:
Rod
RE: Reason for tandem master cylinder for breaking
My Volvo 240 has complicated 4 piston front calipers with dual inlets, so each braking circuit picks up half of each front caliper, and one rear caliper. Nice, but complicated.
I can attest that Volvo's dual MC does work, as I was able to burst 1 rotted line in each circuit during a real hard stop. (still resulting in zero brakes, but the rotted lines were my fault)
RE: Reason for tandem master cylinder for breaking
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Reason for tandem master cylinder for breaking
RE: Reason for tandem master cylinder for breaking
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Reason for tandem master cylinder for breaking
RE: Reason for tandem master cylinder for breaking
Rod
RE: Reason for tandem master cylinder for breaking
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Reason for tandem master cylinder for breaking
On a traditional front/rear mc, disconnect one brake line, you're pedal will move freely about halfway before it starts building pressure on the good circuit.