Straight Six brake master cylinder

[guybetts]

I've got an original Girling master cylinder (0.875) and a rebuild kit I bought a good few years ago now. However, i'm having trouble dismantling it
The piston is free moving against the spring pressure, so on removing the circlip and retaining washer, I'm expecting the "innards" to come out - but they won't. There is no discernable ridge stopping the piston from coming out, and the manual (which is helpful to a point) suggests the piston and valve assembly can be pulled out How? There's nothing to get hold of.
The Coupe manual shows the later type master cylinder with integral reservoir, whereas the early type (mine) has a bolted on plastic reservoir. I wouldn't expect the innards to be any different. Any ideas how I get it apart ?

Guy

[Oaksey]

I normally push the piston down with a screwdriver or something then release. The piston will come a bit further out each time until it's out all the way

[roymck]

Use an airline and blow it out

[guybetts]

I normally push the piston down with a screwdriver or something then release. The piston will come a bit further out each time until it's out all the way

I've done that quite a few times but to no real effect.

Use an airline and blow it out

I was coming round to this idea as the final straw

I've only experience with rebuilding one master cylinder before, and don't recall that being any problem at all.

Thanks for suggestions

[toomanysabres]

Put a bit brake fluid into the open end. Hold in one hand and whack the open end with a wooden mallet or similar NOT metal hammer. The shock should shift it towards the open end. If it moves push it back a bit and hit it again. Very soon you should be able to pull it out.
I did this only but the other day with an apparently completely seized Zephyr clutch slave cylinder and it doesn't have a spring to help.

[Coupe Racing]

Push the piston in as far as it will go , clean the bore , then lubricate the bore , and release the spring pressure as quick as you can.

It ought to pop out and possibly bits fly everywhere if you are lucky

[guybetts]

Put a bit brake fluid into the open end. Hold in one hand and whack the open end with a wooden mallet or similar NOT metal hammer. The shock should shift it towards the open end. If it moves push it back a bit and hit it again. Very soon you should be able to pull it out.

Worked a treat
Thanks

[guybetts]

Now discovered the service kit I acquired some years ago is not the right one

Ordered a new kit at a significantly inflated price over the old one There was a time once when Ford Cortina mk1 parts where cheap as chips, and then everything for a mk1 became Lotus Cortina prices - even if they were never fitted to one