Brakes have been replaced, fluid and filter changed twice, screen cleaned. Brake Valve overhauled but still have a very load noise when left brake is applied hard. Sounds like the brake is coming apart and metal to metal. Have already removed brake lt brake assy again and find nothing wrong. Original problem was metal in transmission fluid. Found left brake assy down to metal yet right brake looked brand new. Right brake will not stop wheel when both brakes are applied and even when used independent to turn right doesn't stop completely. Have bled both sides.