Cotter pins are missing. The cam operating lever has been repositioned on the shaft as a means of avoiding replacement of worn cam, shoes or lining. Any brake adjustment mechanism which will not maintain an adjusted position or is adjusted to its maximum extent. Front brake cable is routed so as to be pinched between fork and frame. There is any roughness, binding, or jamming in levers or pedals.
Modifications make the pedal or lever inaccessible for adequate leverage or operation.
Any portion of the brake hand lever is broken or missing. Visually inspect the condition of the hydraulic system. Hoses or tubing leaks or they are cracked, chafed, flattened, restricted or are improperly fastened. There is any leakage in the brake system. The push rod is improperly adjusted.