8 replies to this topic

[lippo]

 I have just spent the afternoon changing the shoes on my Clubman Estate. They were in a shocking state. Whilst doing the nearside, I noticed a small amount of fluid come out - I presumed this was brake fluid. The master cylinder cap was loose and no pressure was put on the brake pedal. No further fluid came out and the pedal is very firm.

 

 I have a late Metro Mini green tag master cylinder with a servo, and Cooper S disc brakes. Am I right in thinking that I will need 5/8" rear wheel cylinders? I have looked at the cylinders in situ and they just say 'Lucas".

 

 Thanks. 

Edited by lippo, 11 April 2025 - 06:35 PM.

[floormanager]

Now there is a question...

Easiest thing is to measure them.  Somerfords have a great description

 

https://www.somerfor....uk/rear-brakes

Edited by floormanager, 11 April 2025 - 05:50 PM.

[lippo]

Now there is a question...

Easiest thing is to measure them.  Somerfords have a great description

 

https://www.somerfor....uk/rear-brakes

 Thanks, I'll take a look.

Edited by lippo, 11 April 2025 - 05:55 PM.

[nicklouse]

 I have just spent the afternoon changing the shoes on my Clubman Estate. They were in a shocking state. Whilst doing the nearside, I noticed a small amount of fluid come out - I presumed this was brake fluid. The master cylinder cap was loose and no pressure was put on the brake pedal. No further fluid came out and the pedal is very firm.

 

 I have a late Metro green tag master cylinder with a servo, and Cooper S disc brakes. Am I right in thinking that I will need 5/8" rear wheel cylinders? I have looked at the cylinders in situ and they just say 'Lucas".

 

 Thanks. 

The metro set up is designed to work vertical. 
 

how have you fitted it?

[lippo]

 

 I have just spent the afternoon changing the shoes on my Clubman Estate. They were in a shocking state. Whilst doing the nearside, I noticed a small amount of fluid come out - I presumed this was brake fluid. The master cylinder cap was loose and no pressure was put on the brake pedal. No further fluid came out and the pedal is very firm.

 

 I have a late Metro green tag master cylinder with a servo, and Cooper S disc brakes. Am I right in thinking that I will need 5/8" rear wheel cylinders? I have looked at the cylinders in situ and they just say 'Lucas".

 

 Thanks. 

The metro set up is designed to work vertical. 
 

how have you fitted it?

 

 I bought it this way with no provenance to the build apart from the basics.

 

Judging by the build, I can only assume that the cylinders are original Clubman estate version. The car had barely been run since the engine transplant within the last 5 years or so, however the O/S shoes were cracked and worn through to the backing plate so I don't think anyone changed the cylinders.

 

 Edit; it's this master cylinder which is horizontal and for a Mini https://rimmerbros.c...sBoCdLkQAvD_BwE

Edited by lippo, 11 April 2025 - 06:33 PM.

[Spider]

With 7-1/2" Cooper S Discs up front, yes, you'll need 5/8" Rear Wheel Cylinders.

 

[lippo]

With 7-1/2" Cooper S Discs up front, yes, you'll need 5/8" Rear Wheel Cylinders.

 Thanks Spider, so the bore is in relation to the front brakes used, rather than the master cylinder?

[Spider]

 

With 7-1/2" Cooper S Discs up front, yes, you'll need 5/8" Rear Wheel Cylinders.

 Thanks Spider, so the bore is in relation to the front brakes used, rather than the master cylinder?

 

 

Yes.

Braking Systems need to be balanced in regards to front / rear ratio and as most of the braking is done on the fronts, the amount of rear braking is dictated by the fronts.

The size of the master cylinder is a 'balance' between pedal travel and pedal effort.You can have a smaller cylinder, that will give a lighter pedal, but it will travel further to the floor or a bigger master cylinder than doesn't need much moving of the pedal, but you need to wrap the steering wheel around your ears trying to get enough pressure in to it.

Disc Cailpers need a higher hydraulic pressure to work, it doesn't mean at all that they are less effective, it's just the way the work and it's because they need this higher pressure than most cars usually have a servo fitted if they have discs.

[NLinPEN]

This table might also be helpful in selecting the correct components:  https://www.minispar...ap0109/page/86/