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That's good to know and I figured that except my car only had 80k ish miles so I wouldn't expect the master cylinder to need to be replaced even given that old technology. Are you saying that time is the evil of these parts demanding that they need to be replaced regardless? But what would have been the casting number of the one originally installed in the car and are there any pictures please?PS granted I'm having my 2016 f150 master cylinder replaced now due to a recall.
Mileage has nothing to do with it. Brake fluid Dot 3 eats rubber over time.
Back to the master cylinder. At Birmingham I got dinged for a silver cap and not black. Before I paint the cap I have or get a second cap to paint black, I just wanted to confirm that silver cap for my car is correct as I thought we decided in earlier posts on this thread. The MCA grading sheet gives black or zinc dichromate as the options, not silver.
Not sure were the group came to that conclusion (caps not being black with the rest of the master cylinder) but IMHO and from experience they should be painted as a unit black with cap to reduce the chance of the master cylinders rusting while in Fords control. On power brake cars the master cylinder and booster were painted as a unit - together
The 67-68 rules say on manual brakes Semi gloss black or zinc-dichromate. I would assume that would be the entire master cylinder and cap. The rules were changes some time ago to also except natural manual cylinder and caps. That would be better verbiage than calling out just the 67 zinc-dichromate, as how it seems to end up in the rules. I have seen a number of natural master cylinders on manual unrestored cars including my car.