I do own a 1940 Piper J5,the brakes master cylinders are coroded beyond repair and I am looking for spare parts.
Until now I was unable to find any of those.
On an old Piper parts catalogue it is labeled as follows;
Air Associates Brake Master Cylinder AW-20 New part number Old part number
piston 750 055 AW-384
Compressionspring 750 057 AW-386
forward cup ( rubber ) 750 056 AW-385
washer 750 060 AW-390
Boot ( rubber ) 750 058 AW-387
Plunger rod 750 051 AW-19
Can anyone help ?