The Ford Barn - View Single Post - Dot 5 brake fluid and leaking wheel cylinder’s

Bruce Newbery · 08-20-2022, 09:25 AM

I measured all bores on wheel cylinders and they were exactly on spec. I found that the cups were soft and pliable. I took a new Raybestos cylinder apart and found that the new cups were very rigid and the fit was perfect and much stiffer. There is definitely a problem with a reaction of this brake fluid to the cup rubber. I bought new hoses, residual check valves ,wheel cylinders,shoes. I am changing to Dot 3 . I am also removing and flushing the lines with brake clean and alchol.

08-20-2022, 09:25 AM	#18
Bruce Newbery Member Join Date: May 2010 Location: Williams Lake B.C. Canada Posts: 50	Re: Dot 5 brake fluid and leaking wheel cylinder’s I measured all bores on wheel cylinders and they were exactly on spec. I found that the cups were soft and pliable. I took a new Raybestos cylinder apart and found that the new cups were very rigid and the fit was perfect and much stiffer. There is definitely a problem with a reaction of this brake fluid to the cup rubber. I bought new hoses, residual check valves ,wheel cylinders,shoes. I am changing to Dot 3 . I am also removing and flushing the lines with brake clean and alchol.