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Classic Mustangs Tech Forum

Technical discussions specific to 1964-1967, 1968-1970, and 1971-1973 Classic Mustang. Discuss all tech related to in-line six cylinder and V8 powered Vintage Mustangs here.

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Unread 03-08-2010   #1 (permalink)
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Default 1966 Mustang master cylinder push rod help!!

Please, somebody has to have an answer. I found out the hard way that I have to use my original push rod for my new dual bowl master cylinder. Both my old and my new pushrods have that stupid little clip that is locking them into the master cylinder. I have tried the screw driver & needle nose pliers trick, and I've tried the slidehammer trick, both to no good. Does anybody else have an idea as to how to get the pushrod's out? Thanks, Michael
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Unread 03-08-2010   #2 (permalink)
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It's not the C clip style snap ring that you need snap ring pliers for? I will have to look at mine when I get home to see, it has been years since I paid attention to it.
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Unread 03-08-2010   #3 (permalink)
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No, unfortunately it's not. I got that out with a flat head screwdriver. At the end of the pushrod inside the master cylinder, there is this really strange little clip that holds the pushrod in. I can't get it out, I need to get both the new pushrod and the old pushrod out of their respective master cylinders, and on top of it, my car currently does not have brakes and I am supposed to be starting a job sometime in the next couple weeks.
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Unread 03-09-2010   #4 (permalink)
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I pulled mine out of the parts bucket and it had the original pushrod in it still. I put the master cylinder in the vise and pulled hard on the pushrod and it popped out. It looks like it has a compression type ring on it that closes up when you push it in and opens once inside where the larger diameter is. I don't know that mine is original as I bought the car used but that is how mine was set up. Sorry I could not be more help. Hopefully someone else has some input for you.
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Unread 03-09-2010   #5 (permalink)
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Default 1966 master cylinder push rod help!!

Hello 66Sprint200,
Boy can I help here. I broke my clip on the new master and had to do a ton to make it right.

As far as I can tell there are 2 types of clips that hold the rod into the master.

The first looks like a "clover". It is made of spring steel.

The second type looks like a neoprene washer.

Yours is probably the steel "clover".

For removal of the rod to the master - - - - - Hold the master or the "master puck" into a vice and then pull on the rod. It will take a lot of force. You will break the clip.

If it is the neoprene type, they pull easier but round off.

I am thinking you have pulled the "SNAP ring that holds the piston into the back of the master, so you need to put the "piston" into the vice and pull hard on the rod.

Now for the fix - - -

For me I bought a cheap rebuilt master and pulled the clip because I didn't want to leave the clip out. My friend "The Greek" posted about a source for the clip.

Check out this thread that I had used

http://www.allfordmustangs.com/forum...follow-up.html

I will also post a picture of the "clover clip as soon as I remember where I posted it. LOL

For me, I would replcae the clip, but the rod will come out for sure, Print Dad

Here is the clip I spoke of:
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Unread 03-09-2010   #6 (permalink)
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Yes! That is what mine looks like too, glad I wasn't crazy.
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Unread 03-09-2010   #7 (permalink)
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Well after all our efforts, my original cylinder is extremely beat up, and I've even broken part of the piston. So, I've decided that to get my original master cylinder's push rod, my metal teacher and I are going to cut it out. I'm still at a loss on how to get the pushrod out of my new master cylinder. I don't want to, nor can I afford, to break it's piston.
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Unread 03-09-2010   #8 (permalink)
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Default 1966 master cylinder push rod help!!

Hello 66Sprint200,
You can pull the rod out of the Master. Keep the piston in the master, put the master in a vice and pull the rod.

Show the teacher the pix of the clip. Don't squeeze the Master by the bowl, but clamp it on the end. It will come out, the clip may break but not the piston.

Trust me on this - - it will pull out.

Be sure to Thank the teacher - - we don't often hear those words.


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Unread 03-09-2010   #9 (permalink)
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Print Dad, I always say thank you to my teachers. And we were victorious with cutting my old master cylinder's piston in 2. Here are pictures of the 2 halfs of the piston, and the pushrod after I sandblasted it clean.
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Unread 03-09-2010   #10 (permalink)
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Ok, I really need to ask this so I can try and get the other pushrod out, what should I be using to pull it out.
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Unread 03-09-2010   #11 (permalink)
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Default 1966 master cylinder push rod help!!

Hello 66Sprint200,
The pictures are great - nice job. I am glad you thank the teacher.

What you need to do is put the master in a strong stable vice.

Hold it on the end (the part that bolts against the firewall)

The put a ratchet handle through the end of the rod and pull like heck.

You will not break the rod. The clip is small. See the ridge inside the piston? That is where the "spring clip" opens and catches.

If you can't just pull the rod out, you will need to make some sort of leverage point.

See if I can explain this - -

Clamp the master in the vice with the rod facing you. Now run a bar or ratchet handle through the open end of the rod. Now you have the bar running parallel to the back of the master. See if you can put 2 blocks of wood between the "bar and the face of the master. Now take a wedge and try to force the rod towards you.

One good tug will pull it out. If not you need to make a fulcrum point so when you push on a pry-bar it forces the rod outward.

Don't squeeze the master by bowl, could caaue problems

I can't draw but here it is -

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Unread 03-10-2010   #12 (permalink)
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Nice drawing Print Dad
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Unread 03-10-2010   #13 (permalink)
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I got it!!! Print Dad, I took your idea and modified it abit. I used a pair of pliers, my jack, and my friends jack. I then held the master cylinder with the pushrod sticking up. I put the pliers through the pushrod, and put a jack on each ear under the pliers. Then I just jacked them up evenly and it popped out.:yelpleased:

Here is my picture created in paint.
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Unread 03-11-2010   #14 (permalink)
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Default 1966 master cylinder push rod help!!

Hello 66Sprint200,
Nice going - - great to hear. You should be OK now but let me know

GRADE of work - - A+

GRADE of PIx - - A

Nice going - - - Print DAd
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Unread 03-11-2010   #15 (permalink)
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Thanks. I couldn't have gotten it without you guys. And I thanked both my teachers that helped me several times. The master cylinder is now installed, and Saturday my friend Eric and I are going to bleed the brakes.
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