Harley Davidson Panhead brakes 1948-1965 will cover mechanical and hydraulic brake systems used on springer front forks hydra glide forks also rigid and swingarm frames.
Harley Davidson Panhead front brakes for springer front fork
This front brake assembly is used on big twin Springer front forks 1937-1949
There are two types of brake drum that will fit this Harley Davidson brake assembly. a pressed steel drum 1937-1939
and a cast steel drum 1941 and later.
1937-1939 and 1941 and later backing plates are interchangeable.
Harley Davidson panhead front brakes for hydra glide
The “Glide front brake” is used on hydra-glide, Duo-glide and Electra-glide 1949-1971
1949-1968 glide front brakes are mounted on the left slider.
1969-1971 brakes are mounted on right slider.
Drums backing plates and shoes are year specific.
Early drum 1949-1966
later drum 1967-1971 to accommodate new wheel hub.
Early 1949-1968. late 1969-1971 to accommodate right side mounting.
Early shoes are longer.
rear mechanical brakes.
This mechanical rear brake assembly is used on all big twins 1938-1957.
Drums are made of stamped steel.
Upper and lower shoes must not be interchanged 1938-1957.
Panhead hydraulic rear brakes
In 1958 hydraulically actuated rear brakes were introduced.
Drums and sprockets
Early 1958 drums are stamped steel with 1/8″ rivet holes. 1-5/64 shoe. Same as mechanical brake.
late 1958-1959 are cast steel with 1/8 rivet holes.1-5/16 shoe.
1960-1962 cast steel with 3/16 rivet holes. 1-5/16 shoe
1963-1966 cast steel with 3/16 rivet holes. 1-13/16 shoe
1967-1972 uses drum designed for the later hub.
Backing plates, sprockets and many other components are drum year specific.
Rear brake hydraulic brake master cylinder
Here are some great resources for more detailed information about Harley Davidson Panhead brakes.