pewe
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| posted on 29/8/08 at 11:25 AM |
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Front & rear master cylinders - help
Accepted wisdom said I should put the smaller cylinder to the front, the larger to the rear which is what I did.
Front is 0.625 and rear 0.75. It's Cortina front discs and calipers with Green Stuff pads and ordinary Cortina(?) drums and shoes on the
rear.
It failed SVA because the rears locked first.
So any suggestions as to how to cure this gratefully received. I wonder if it's the pads not bedded-in as he had to push very,very hard to
achieve any sort of reading from the fronts.
Cheers, Pewe
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coozer
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| posted on 29/8/08 at 11:28 AM |
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balance bar set up? are the cylinder push rods screwed in correctly and is the bias bar wound towards the fron M/C??
1972 V8 Jago
1980 Z750
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pewe
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| posted on 29/8/08 at 11:37 AM |
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Good point, Coozer, scurrying off after work to check it. Thanks, Pewe
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hughpinder
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| posted on 29/8/08 at 12:02 PM |
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smaller cylinder = higher pressure therefore more force on front brakes. Since these are disks and the rears are drums, I would expect the fronts to
lock much easier - So as coozer says, or perhaps mechanical fouling of some part, or the seals have failed on the 0.625 cylinder, or air in
lines/calipers to front, or calipers seized!
Good luck
hugh
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Paul TigerB6
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| posted on 29/8/08 at 12:11 PM |
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I'd suspect either the pads need further bedding in as you suspect, or there is still a little bit of air in the front lines somewhere. How is
the pedal feel?? Is it at all spongy or go solid pretty quickly?? I've always jammed the pedal down overnight to pressurise the system and then
bleed again the following day. Seems to help get the tiny bubbles out that always seem to linger.
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