Who needs rear brakes?
Discussion
The old stopping pedal on my S2 suddenly appeared to have a lot more travel than normal the other day, and braking became rather more of a challenge. No change in fluid level, but I have just jacked up the back end to find the rear brakes don't work at all, zip, diddly, nothing! 
Handbrake still works. shoes are OK and I put new cylinders on both sides last year. Only thing I can think of is the Acceleration Valve.
Has anybody else had similar problems, and is there a cure or do I just replace the valve & hope it was that?
Thanks
Handbrake still works. shoes are OK and I put new cylinders on both sides last year. Only thing I can think of is the Acceleration Valve.
Has anybody else had similar problems, and is there a cure or do I just replace the valve & hope it was that?
Thanks
Handbrake is mechanically separate from the slave cylinder (unlike on the disc-equipped cars) so all the evidence seems to point to a hydraulic failure.
The bias valve is mechanical so could in principle stick, might be worth giving it a light tap to see whether it will free up. Doesn't seem likely to me that this is the problem, though.
Given that you have worked on the slaves recently, I would be inclined to suspect some problem caused by this. If you have air in the rear circuit, it'll stop the rear brakes working but not the fronts (dual circuit/tandem master). So I suggest you start by bleeding the rear circuit again. With the drums off you should be able to see whether there's any movement at all at the slave when you press the pedal (carefully in case it does move and start spitting pistons out at you).
The bias valve is mechanical so could in principle stick, might be worth giving it a light tap to see whether it will free up. Doesn't seem likely to me that this is the problem, though.
Given that you have worked on the slaves recently, I would be inclined to suspect some problem caused by this. If you have air in the rear circuit, it'll stop the rear brakes working but not the fronts (dual circuit/tandem master). So I suggest you start by bleeding the rear circuit again. With the drums off you should be able to see whether there's any movement at all at the slave when you press the pedal (carefully in case it does move and start spitting pistons out at you).
Sorted.
The Master Cylinder needed replacing, which is a problem I have never encountered before, even on several of Henry's more mature models.
Nothing that £157.17 from the motor factors couldn't put right - you never have to worry about what to do with spare cash with a Tiv in the drive!
The Master Cylinder needed replacing, which is a problem I have never encountered before, even on several of Henry's more mature models. Nothing that £157.17 from the motor factors couldn't put right - you never have to worry about what to do with spare cash with a Tiv in the drive!
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