New Master Cylinder issue

[HappyJack]

I have a 67 Fury III with 4 wheel drum brakes. Recently my master cylinder gave out, and this is when I noticed it was the wrong one anyway. It is a MC for a disc/drum setup.

Anyway order the proper one from RockAuto.
When it arrived I noticed it had a clip to hold the plunger in during shipping.
I bench bled the master cylinder, then went to remove the clip and the plunger started coming out. So I quickly reinstalled it.

This may be a stupid question, but I do remove this before installing. Right? Doesn’t seem right to leave it on.

I can’t compare to the old one because it is different and wrong. Might not even be for this car even if it had discs. But it is recessed and has a snap ring holding it in.

It seems like I should remove the clip and quickly bolt it on, but with the clip there it won’t sit flush.
Thoughts?

 

[3C's & a D?]

I've never seen that before, on either disc/drum or drum/drum. I can't see it mounting properly with it in place, I'd return it.

There was a thread on this forum recently where a member received a new master cylinder with a note saying not to bench bleed, which is the opposite of any new master cylinder I've received. What did your note say?

 

[HappyJack]

There was a thread on this forum recently where a member received a new master cylinder with a note saying not to bench bleed, which is the opposite of any new master cylinder I've received. What did your note say?

The instructions say to bleed, and gave directions. Even supplied plugs to use for bleeding. Though usually I have used lines that loop back into the top of the reservoir.
I still have the plugs in, maybe I’ll remove them now. (Instead of when I’m ready to hook up the lines) Maybe there is still pressure in the MC causing the plunger to come out.

 

[Vaanth]

The piston retainer and screw are used to hold the piston during shipping and handling on this style master cylinder with manual brakes. It is removed before use and replaced with a bolt-on stop/retainer and rubber boot, plus the push rod retainer is inserted in the piston cavity:

If the master cylinder is used with power brakes, the retainer clip is still removed, but the boot/stop/retainer is not used. In this case the piston must be held in place until placed against the power booster push rod, then the master cylinder pushed back and mounted on the booster.

NOTE: the retainer is also used to hold the piston in the cylinder bore while bench bleeding.

 

[MrMoparCHP]

This is what you need...

Alan

 

[Big_John]

This is what you need...

Alan

You only need this if you have manual brakes.

Even though he didn't say it, I think the OP has power brakes.