Because of the hard work that the vehicle does. Every year the cylinders are changed on its yearly overhaul. There are two on each wheel cost £336 approx. for just the front.
There is one on each rear wheel.
If I find as I said that the piston seal leaks too often, then the cylinder is changed again (under warranty).
The dirty fluid is caused from the wear of the piston rubbers.
On each piston there is the seal (a rubber ring) that has a taper (wide part to the top) and there is a dust cover over the top of the cylinder where the brake shoe fits into the slot on top of the piston.
But I expect you all know this.
The springs are good. A mole grip type tool has to be used to lift the shoe from the system Trust me when I tell you it is not easy to remove the shoe because of the strength of the springs.
In answer to JohnWR. If the hole was blocked in the master, this would be spotted when the brakes are bled. and would affect both wheels.
I have jacked up the front a few times to check to see if there is binding and the wheels run free.
Also if there was binding I would feel it in the brake pedal as it would go hard.
I feel sure that with the help and sugestions from you guys, we will solve this in the end.
There is one on each rear wheel.
If I find as I said that the piston seal leaks too often, then the cylinder is changed again (under warranty).
The dirty fluid is caused from the wear of the piston rubbers.
On each piston there is the seal (a rubber ring) that has a taper (wide part to the top) and there is a dust cover over the top of the cylinder where the brake shoe fits into the slot on top of the piston.
But I expect you all know this.
The springs are good. A mole grip type tool has to be used to lift the shoe from the system Trust me when I tell you it is not easy to remove the shoe because of the strength of the springs.
In answer to JohnWR. If the hole was blocked in the master, this would be spotted when the brakes are bled. and would affect both wheels.
I have jacked up the front a few times to check to see if there is binding and the wheels run free.
Also if there was binding I would feel it in the brake pedal as it would go hard.
I feel sure that with the help and sugestions from you guys, we will solve this in the end.