Had the same problem on my 37 several years back. Same thing, the return port in the master cylinder had some trash in it. Cleared it out and no problems after that.
Joe smile


"Truckin' Around .......... Since 1937!"
My name is Joe and I am addicted to Classic Country Music. I just can't hep myself.
Operators are standing by to take your calls!
Now cruising in the Passing Lane