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2012 RSS brakes locked up - can I just remove the top of the Master Cylinder to clean the Return Port?
- Thread starter DBCC
- Start date
Dusterdude
Active member
Its worth a shot
Snowbelt Spyder
Well-known member
The Spyder master cylinder is a dual master cylinder, with separate front and rear chambers and pistons, for separate front and rear brake circuits. Are all three wheels locked up? If so, I think I’d be looking at more of a common mode failure with the linkage, etc.
Remember, that brake fluid reservoir that is under the seat is just the reservoir. A hose from each chamber just feeds fluid down to the master cylinder. The actual master cylinder, where your compensating (return) ports are, is far forward of that. Not a simple matter to get to. Good luck with it.
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Snowbelt Spyder
Well-known member
Well, I think that you need to consider the probability that both return ports in both front and rear piston chambers, which are physically independent of each other, could clog at the exact same time. And if that’s true, then you have much bigger maintenance issues then just trying to stick a piece of wire in there to poke out an hole, and calling it a day. And this master cylinder, because of its remote reservoirs, is not typical of what you may be used to, when trying to break into it. So, all I can recommend is to rule out any other common failure first, such as linkage issues…lube, corrosion, etc.
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Any chance the return spring (if there is one) is busted? Not familiar with the ABS system so possibly that? The actual piston of the brake valve is sticking in the bore? The latter seems like more of a chance if the fluids old and saturated with moisture. Other that the reservoir and the pedal linkage that's the only mechanical part they have in common that I can think of.
I manage to get all the brakes to release by pumping the breaks several times ,however they all locked up again .All calibers are working as they should when the brakes released. .All brake pads were replaced last year .The system flushed and new DOT4 FLUID added. The tandem (dual) is the extra master cylinder
Snowbelt Spyder
Well-known member
Well, not sure what you mean by "extra" master cylinder. There's no such thing. It's the only one there is. I think that you have a mis-understanding of the system, or else we're having a really weird language problem. There's no master cylinder under the seat beneath the reservoirs. Only the two hoses that go down to this one. If you try to open up your master cylinder, you will need a complete bleed with BUDS. There are no replacement parts and no repair kits. So, the best I can do now is to just give you a link below, to a shop manual that you can download. If you want, post a picture of what you believe to be the master cylinder, because you think that this one is an "extra", and we'll identify what it is. Otherwise I don't think I can be of any more help to you. Good Luck with it.
2012 Can-Am Spyder RS Series Repair and Maintenance Manual Master Collection
It covers the 2012 Can-Am Spyder RS (Auto, Manual & Audio Convenience) RS Series, NOT RT (see the manual below for it) Professional Keyword Searchable Factory OEM Manual - 1305 Pages BRP has decided not to make a new repair manual for 2012. In addition to the 2011 repair and maintenance...
brpmanuals.com
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The fluid was changed last year along all brake pads and also flushed the lines
Sorry the word extra in my last message should have been the word exactly . My tandem (dual) master brake cylinder is exactly the one in the picture you sent. Sorry for the confusion .There is only one master cylinder supply the front and rear brakesWell, not sure what you mean by "extra" master cylinder. There's no such thing. It's the only one there is. I think that you have a mis-understanding of the system, or else we're having a really weird language problem. There's no master cylinder under the seat beneath the reservoirs. Only the two hoses that go down to this one. If you try to open up your master cylinder, you will need a complete bleed with BUDS. There are no replacement parts and no repair kits. So, the best I can do now is to just give you a link below, to a shop manual that you can download. If you want, post a picture of what you believe to be the master cylinder, because you think that this one is an "extra", and we'll identify what it is. Otherwise I don't think I can be of any more help to you. Good Luck with it.
2012 Can-Am Spyder RS Series Repair and Maintenance Manual Master Collection
It covers the 2012 Can-Am Spyder RS (Auto, Manual & Audio Convenience) RS Series, NOT RT (see the manual below for it) Professional Keyword Searchable Factory OEM Manual - 1305 Pages BRP has decided not to make a new repair manual for 2012. In addition to the 2011 repair and maintenance...
Snowbelt Spyder
Well-known member
Well. That clears that up. I was starting to wonder. Anyway, there are no dis-assembly instructions for that thing. And like I said, no parts or repair kit. If the return ports are clogged, it’s a corrosion issue and the master cylinder might not be worth using anyway. If it was me and I felt that I had eliminated everything else, and I had to get into this job that deeply with such an involved recovery, I’d just replace the thing. I know. We all like to save money. But you could go through a lot of trouble just to find out that it still doesn’t work.
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Snoking1127
Well-known member
Sounds like the piston assembly is sticking. I doubt there is a rebuild kit for it.
#17 Tandem Cylinder Master
705600722
$369.99
#17 Tandem Cylinder Master
705600722
$369.99
Snoking1127
Well-known member
How a tandem master cylinder works, with the exception that the Spyder has a dual reservoir. Which is probably to creates a little failsafe on loss of brake fluid.
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