any other ways to do this? I don't have a compressor, so getting access to compressed air is easier said than done.

 

Jam a hose on the connector, plug it back in the rear hole. Put a finger on the other port and blow. That should be enough, but you might want to sit down first.

 

Duplicate post. But I'll use it.

I didn't mention the retaining pin. I assume it's out.?

 

Wait, what? There's a retaining pin?

 

Found the retainer pin. Should be in good shape now. I'm having a little bit of a mental lapse, does the first seal look right to you folks? I thought I had its position memorized, but once I got it off I forgot it.

 

you should try cleaning the crud off the piston 1st???

soak it in acetone or alchohol, without the seals on it!!

 

So, got it all rebuilt and back in the car. New servo is in place as well. Hooked up a bleeder kit from the line hookups at the master to the reservoir. I don't seem to be getting fluid from the cylinder to the bleeder kit when I pump it. Any ideas? I'm gonna pull it when I get home because I'm afraid the plunder bit in the servo might have fallen out or something. Any ideas on what I'm doing wrong if this is not the case?

 

I did one recently for a friend, using a new M/C. In the end, what I did was get my friend to pump the pedal, while I held my fingers over the output holes of the M/C (the threaded parts where the two brake pipes that feed the callipers screw in). When he pushed the fluid pushed my fingers out of the holes, but on the pedal coming back up, my fingers sealed the holes so air could not get back in. Half a dozen pumps and all was well.
Greg

 

The problem is that I don't seem to be getting fluid to the output holes.

 

That is what I am trying to explain. Get someone to push the pedal and hold it down, put you fingers hard over the holes. As the pedal returns, assuming you have the seals in correctly, fluid HAS to come into the M/C from the reservoir. Keep doing this until fluid appears. Good luck
Greg

 

.

 

the MC rod can be assembled and the retainer pin inserted with the plungers at the wrong position. It won't move. Did you bench test it's action?

 

Okay, got the cylinder pulled. The pistons travel correctly, but stick after being depressed. A couple quick searches lead me to believe that the after market rebuild kit could be slightly larger than the bore of the cylinder like on some MGs. Any input on this?

 

Seals in the MC are tapered and seal more tightly when pressing against the hydraulic fluid, but they should easily release and tend to spring back a tiny bit.

I dont think that that you could easily assemble the MC piston if your seals were too large. Let's assume the kit is valid. Are you sure of your order of assembly? This is a 74-77 MC but similar


.

 

Thank you. It looks like the first seal may be placed incorrectly. I'll give it a shot.

 

Pulled the primary piston and flipped the seal around the way I had it originally (as shown in photo) like it is in the diagram and now the piston absolutely will not enter the cylinder.

 

This was the MG article describing a similar problem http://mgaguru.com/mgtech/hydraulics/ht204a.htm

 

Can you take a picture of your entire assembly the way you are installing it?

I pulled my master a few years ago and had it painted and back in working condition within the day, something must be out of order to make this such an issue. Are you using brake fluid to lubricate it when assembling?

Did you look inside to see if there is any gunk inside the cylinder bore? What brand is the rebuild kit?