Hi all,
The 404 brake saga continues. To recap, 1968 or 69 disk brake model.
I’ve had the master cylinder done, I’ve fitted a new booster, I’ve replaced the limiting valve on the rear axel with one of those adjustable limiters used in racing, a good one purchased from PBR in Adelaide, and it sits between the solid pipe on the chassis and the flexible hose to the tail shaft. The rear limiter has been replaced with a three way union, no moving parts.
Rear slaves were replaced about three years ago, but were not used for a year or more while we waited for my son to be old enough to drive the car.
Now the car keeps getting air in the lines, in the back half of the circuit. Clamping the hose between the limiter and the drive shaft immediately fixes the brakes to rock solid.
There is absolutely no evidence of fluid loss in the system. But within a week or two of driving the brakes get softer and softer and softer.
The only idea I can come up with is that it is somehow drawing air back in through the seals on the rear slaves. Is this possible?
Matt
The 404 brake saga continues. To recap, 1968 or 69 disk brake model.
I’ve had the master cylinder done, I’ve fitted a new booster, I’ve replaced the limiting valve on the rear axel with one of those adjustable limiters used in racing, a good one purchased from PBR in Adelaide, and it sits between the solid pipe on the chassis and the flexible hose to the tail shaft. The rear limiter has been replaced with a three way union, no moving parts.
Rear slaves were replaced about three years ago, but were not used for a year or more while we waited for my son to be old enough to drive the car.
Now the car keeps getting air in the lines, in the back half of the circuit. Clamping the hose between the limiter and the drive shaft immediately fixes the brakes to rock solid.
There is absolutely no evidence of fluid loss in the system. But within a week or two of driving the brakes get softer and softer and softer.
The only idea I can come up with is that it is somehow drawing air back in through the seals on the rear slaves. Is this possible?
Matt