The noise in the cab is like a dry bearing or a kind of hiss like steam coming from a cooker relief vv.
The noise seemed more on the lhs; when the lhs front road wheel was turned it stuck, back and forth released it. I removed the wheel - which was rusted on - found rust on the discs outside of the shinny area, more so on the inner the pad of which was more worn on the out side of the wear area (rust).
Took the caliper off and cleaned of the rust as best could. Made sure the pads could move. Filed off the rust on the piston perimeters. All back together and the disc revolved easily pressed the brake pedal, released it and the disc was difficult to turn. The noise was lessened but the next day was just as loud.
The noise starts at around 20 mph, pressing the brake pedal makes no difference to the noise but as the vehicle slows the noise reduces in volume.
Sat 14 and Sun 15th or Oct 2017. Removed both calipers cleaned off rust, ground off rust from discs, put calipers back together using copper grease as required, discs rotate freely, apply brake pedal and both discs have pads binding on discs, opened con'' on flexi pipe to metal pipe and fluid came out same at flexi con' to caliper, went for a run and noise is still there.
Have now got two new flexi pipes because there could be internal failure of the pipe and caliper repair kits as maybe the pistons are sticking or there is dirt behind the pistons.
Has anyone got a drawing of the caliper? Does anyone know if the hydraulic fluid is bleed from the bottom of the caliper or is it from the top?