Master Cylinder Cap

I have a 65 cj5, F-head, with a single reservoir master cylinder. It's been sitting for quite a while, so the brakes barely work at all. I'm pretty sure that there is little to no brake fluid in the MC. Unfortunately the MC cap head is square, not to mention partially stripped. Does anyone have any suggestions on how to remove the cap? There is very limited room since it is mounted on the frame rail and paritally stripped. I'm wondering if I should remove the whole mc to get the cap of???

 

Howdy, I've got the same, a '65 CJ-5. Mine sat for 12 years so the brakes needed a total overhaul. I'm thinking you ought to replace the master cyl. and the wheel cyls., flush out the hard lines, replace the rubber lines, replace the shoes maybe, and turn the drums. Only way to make sure you're going to stop when you want to. I got to my master cyl. cap from underneath with a big wrench. There is a hatch through the floorboard just over the m. cyl. but you probably already know that. Good luck!

 

A 3/4" wrench would work great, but there is no room to turn it. I've tried from the engine compartment and the access hole in the floor board....... Its also too stripped at the corners for a 12 pt socket to work.

 

Because it's kinda stripped already, can you try a small (6") pipe wrench on it? Is it a steel cap or plastic?

 

I think the guy's having a prob that we with 'A1's don't have regarding access to the cap. So, I don't really know what he's experiencing but wanted to offer a possible solution. On my 'A1, I can easily get a 6" pipe wrench (6" overall length) on the cap "nut" from either the engine bay or in the cab and can loosen and tighten it (just tried it)

 

On my buddies CJ I took a rather large washer, cut it in half and welded it to the nut/bolt head. It made a nice wingnut and you can loosenit by hand through the hole in the floorboards. Of course that doesn't help you get it loose now, but it works well once you get the new MC in.

 

I hear you about the full replacement of everything. My goal right now is to get it running and driveable, then assess what I need to replace to make it full street and light trail ready. Hopefully with some brake fliud I can get some braking action.

I think I found my solution.......apparently they make 8 pt sockets. Hopefully I can order one from carquest and get the MC cap off with that. I believe it was 3/4"x3/4", does anyone know for sure (65 cj5, F-head, orig. single resevoir frame mounted MC)?

 

You could always remove the whole removable floor assembly like you would do for working on the clutch. Gets all that flooring out of your way and you are not trying to work through that little 4 1/2 in hole in the floor.

 

I think the thread before yours is about 5 years old. He should have gotten it by now.

 

Yeah, I just noticed the date.

How ever, you never know. That thing could have been sitting there all this time waiting for an answer.