Master Cylinder Plug ??

Posted By: 44D6PAKCUDA

Master Cylinder Plug ?? - 05/08/22 02:57 PM

I have 2 identical NOS 1971-2 A Body manual drum brake master cylinders.1 came with a plug installed in the one chamber and the other does not.What is/was the purpose of the plug and what application do you need or not need this installed? Thanks for any info Moparts

Attached picture master cylinder 001.JPG

Attached picture master cylinder 001.JPG

Attached picture master cylinder 002.JPG

Posted By: gtx6970

Re: Master Cylinder Plug ?? - 05/08/22 03:15 PM

Retainer for the front piston

Posted By: 44D6PAKCUDA

Re: Master Cylinder Plug ?? - 05/08/22 03:22 PM

Thanks for the reply Bill.So it needs to be in there correct?

Posted By: John_Kunkel

Re: Master Cylinder Plug ?? - 05/08/22 07:14 PM

Is the empty hole threaded?

Posted By: gtx6970

Re: Master Cylinder Plug ?? - 05/09/22 03:02 AM

Originally Posted by 44D6PAKCUDA

Thanks for the reply Bill.So it needs to be in there correct?

I think its more for assy purposes than anything .

Posted By: 44D6PAKCUDA

Re: Master Cylinder Plug ?? - 05/09/22 10:55 AM

Originally Posted by John_Kunkel

Is the empty hole threaded?

Yes it is

Posted By: 71GTX471

Re: Master Cylinder Plug ?? - 05/09/22 10:47 PM

What I don't like is how 2 same nos m/cs have different feed/return port sizes.