MF 65 brake noise

[whiteman55]

Total restoration in 1999. Disc brakes never right. Problem is a loud bang noise upon depressing brake pedal. Very long story short- it appears that upon depressing the brake pedal the actuator is rotating within axle tube and the stop of the actuator is striking the stop of the axle tube. This makes a single metal to metal bang noise. Worse at faster speeds. Partially lessened if I "pretension" the brake by "riding" the pedal. Bangs in forward and reverse. My theory is that the disc brake material is too "grabby" and is "spinning" the actuator too fast / too far. I have tried OEM top-shelf "M" disc and OEM second quality "V" disc. (Both a bonded material). Same problem. Other than noise brakes do work well. Actuator is perfect, new balls / new springs, all braking surfaces have been resurfaced. Original 1958 production used a riveted asbestos brake material. Has anyone else had this problem? I am considering to rework the original brake plates with new riveted disc material but have learned that many materials could be used such as woven and various grades of non woven friction materials. MM Weaver sells a disc reline kit with rivets. Has anyone tried to re-rivet these brakes and how did that work? A big question is how the bonded brake disc parts are used by others without this problem. What am I missing?

 

[jimmyhouser]

Total restoration in 1999. Disc brakes never right. Problem is a loud bang noise upon depressing brake pedal. Very long story short- it appears that upon depressing the brake pedal the actuator is rotating within axle tube and the stop of the actuator is striking the stop of the axle tube. This makes a single metal to metal bang noise. Worse at faster speeds. Partially lessened if I "pretension" the brake by "riding" the pedal. Bangs in forward and reverse. My theory is that the disc brake material is too "grabby" and is "spinning" the actuator too fast / too far. I have tried OEM top-shelf "M" disc and OEM second quality "V" disc. (Both a bonded material). Same problem. Other than noise brakes do work well. Actuator is perfect, new balls / new springs, all braking surfaces have been resurfaced. Original 1958 production used a riveted asbestos brake material. Has anyone else had this problem? I am considering to rework the original brake plates with new riveted disc material but have learned that many materials could be used such as woven and various grades of non woven friction materials. MM Weaver sells a disc reline kit with rivets. Has anyone tried to re-rivet these brakes and how did that work? A big question is how the bonded brake disc parts are used by others without this problem. What am I missing?

Antisqwauk fluid maybe. It's not cheap, but your local dealer should carry it. Other than that, you should double check your reassembly. Maybe the pins holding your brake expansion plate are worn out. Or the riding surface where your plates meet the machined surface in the axle needs a shave at the machine shop.