Posted by Vaughn [108.162.215.9] on Thursday, August 26, 2021 at 19:21:50 :
In Reply to: Brake master cylinder posted by Steve in FH [108.162.246.196] on Thursday, August 26, 2021 at 18:00:16 :
The fluid in the MC is leaking past the cup. If the return hole is plugged the system would hold pressure. The one with the bolt on top is Raybestos# 544. The closed may either be for a MC with booster or W300 truck. After market catalogs don't list a 1963 WM300.
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