Strange filler cap on Master Cylinder

[Art Newland]

Picked up a new master cylinder for my 49 F-1. The filler cap isn't anything like the old one. Look familiar? Do I just have the wrong one?

[alanwoodieman]

looks like some one added a fill plug on top of the fill plug--possible to help in bleeding the brakes? one on left is like the old original ones not the plastic one

[deuce_roadster]

I think that plug is removed for pressure bleeding.

[G32]

Originally Posted by alanwoodieman

looks like some one added a fill plug on top of the fill plug--possible to help in bleeding the brakes? one on left is like the old original ones not the plastic one

The master cylinder is used on certain model forklifts --and has a cap

with a remote fill fiting -- tube from an upper reservor down to

master cylinder cap. My understanding.

Gene Tulsa

[Art Newland]

Hmmm, that's just strange. Maybe I can just take that cap off and use the old one?

[mike42]

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Art .........

Very glad you asked this question, as I too bought a MastCyl at Napa and I have the same cap ! The cap on old original was exactly the same as yours in second picture. I left it alone and didn't use the old cap and all is well.

It would be interesting to find out what that is all about.

Thx...... Mike

[Kerk]

I have a remote fill cap with a piece of tubing attached. I will never use it and got it with some other stuff. kx

[Tom/SC]

The last three (different Fords) master cylinders that I have bought are made in this fashion. The first one the cap was so tight That we had to really struggle( strong arm) to get the cap to unscrew. Wagner box, but made overseas thank you! Tom Byrd

[Kurt in NJ]

Whatever cap you use make sure that the vent is open

[Art Newland]

I found this on Mac's website. Listed as "Wagner Brake". Is it just a different manufacturer?
http://www.macsautoparts.com/ford_tr...s-made-f1.html

[Art Newland]

Just tried to remove the entire cap... wow-wee it's on there tight! The little hex shaped bolt/plug comes right out. I added some fluid through the small opening and got it pumping. Sure doesn't seem to hold much brake fluid however...

[RalphG]

I found from experience that those old caps will twist off if they have been stuck for years. I needed a new master cylinder anyway.

[Kube]

Originally Posted by Art Newland

Picked up a new master cylinder for my 49 F-1. The filler cap isn't anything like the old one. Look familiar? Do I just have the wrong one?

Neither is correct. The "new" one is typical of what is now being installed. It works but is wrong. Your "old" one works too but also is wrong.
For those that might care, my attached photograph depicts a proper cap.

[Art Newland]

It may be wrong. but was handy. I cut down a cheap funnel and threaded it in the center plug hole. Made bleeding the brakes a lot easier.