13 replies to this topic

[maccers]

Hi All, I've just bought this pedal box with square pedals, not sure if that denotes anything. I was hoping to mate it with a "yellow" type dual master cylinder - this one:

 

https://www.minispar...ow-identity-tag

 

 

Will that work?

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[stuart bowes]

mine goes with that same master cylinder and I can't see anything about yours that looks different (other than the pedal shape)

 

my pics if it helps for comparison:

 

https://www.theminif...-998/?p=3754879

and

https://www.theminif...-998/?p=3755166

Edited by stuart bowes, 18 February 2025 - 11:27 AM.

[maccers]

Thanks, yep so I was looking at one with tapered pedals also, but just wandered if that meant anything with the fitting to various types of m/c. I have a servo setup currently and (assume) matching pedal box that I am replacing with non servo type (to free up room in engine bay).

[stuart bowes]

far as I'm aware the pedal boxes are the same, except the servo m/c has an extra linkage from the pedal because it's at a different angle

 

others will have to confirm that for sure though I guess as I've only ever seen the non servo ones first hand

Edited by stuart bowes, 18 February 2025 - 11:48 AM.

[maccers]

I'm just looking at some other info, seems the ones with square pedals are the early "small" type, and then the ones with the diamond/tapered are the later type, before the servo type. I have a diamond pedal shaped one that came as a spare with my car, as the servo one was fitted, but had assumed this was also a servo type. 

 

So I have 3 now, 1 fitted that I have used with a direct fitted servo for ages, 1 that I just bought with the square pedals and one with diamond shaped pedals that I assumed was just a spare but upon closer inspection it seems to be a later, non servo type. 

 

I think between them all I should be covered when I fit the new dual m/c yellow tag non servo type..!!

[maccers]

This is an interesting read!!

 

https://www.theminif...ly-type-pedals/

[stuart bowes]

Ah see this is why I always make sure to point out when I'm not sure..

 

from what I can tell from that thread though, the main difference is between the earlier single circuit and the later dual circuit .. but the m/c you linked is dual circuit, and presumably so is the servo assisted one (?) 

 

is that the case, and if so are they then interchangeable which is what you're asking, I think

Edited by stuart bowes, 18 February 2025 - 03:26 PM.

[Ethel]

I'm just looking at some other info, seems the ones with square pedals are the early "small" type, and then the ones with the diamond/tapered are the later type, before the servo type. I have a diamond pedal shaped one that came as a spare with my car, as the servo one was fitted, but had assumed this was also a servo type. 

 

So I have 3 now, 1 fitted that I have used with a direct fitted servo for ages, 1 that I just bought with the square pedals and one with diamond shaped pedals that I assumed was just a spare but upon closer inspection it seems to be a later, non servo type. 

 

I think between them all I should be covered when I fit the new dual m/c yellow tag non servo type..!!

 

 

You'll be able to confirm if that last comment from Sprocket is right 

 

Certainly a yellow band is mostly likely to work ok with the early pedals. I've had a (Metro) dual circuit master with the early pedals & a remote servo & it worked. Maybe I should have cracked some bleed screws open to properly test if it still would with a failed circuit.

[Ethel]

The online parts catalogues should confirm with the part numbers for the pedal box & clutch pedal. Seems unlikely they'd redesign the lot for the horizontal master.

[stuart bowes]

^ that was pretty much my line of thinking

 

minimizing of costs being an all-important factor as the mini got older and they had to work harder to sell them, additional R+D isn't something the bean counters would be too pleased about.  just design the new parts to work with what they already had

Edited by stuart bowes, 18 February 2025 - 03:54 PM.

[maccers]

Yeah, I see what you mean. So I have the horizontal m/c fitted with the servo directly connected, this is how the car came to me. Its a dual circuit front/rear split and its been in the car for years. 

 

The pedal box that also came with the car I just assumed was a spare servo type, however upon closer inspection it has the same diamond shaped pedals, but a different shape to the actual pedal box as what I have fitted now, the metal cut outs are circles vs the long cut out but if that makes sense, ie the bit inside the car. 

 

The one I bought with a view to using it with the non servo yellow tag m/c has the same big elongated bit but square pedals...! It was advertised as an "early small pedal box" so assume this to be from a early single line setup.

 

So I might be able to get away with the spare one that came with the car that I had assumed was a servo type, but thinking about it, if the former owner changed to a servo pedal box, they kept the non server spare - what m/c they had, I dont know... to the servo type I have now, it makes sense it would have been an early non servo type, but mated to what m/c no idea.

[Ethel]

The age of the car should tell you, if any was original, they all superseded one another.

 

The one in your photo is the earliest type, but I can't recall them having a brake light switch.

[Spider]

There were several pedal angles used and if I recall, the late diamond type that was used with the servo, has a very unique angle.

 

The other issue is that when going from single to tandem, the hole in the body and pedal box needs to be enlarged for the rubber boot on the master cylinder, though, that's easy to resolve.

 

One last comment I'll give here is that the Yellow Tag is not fail safe in the way you think it is, ie, if you have a leak anywhere, you'll loose all brakes, just as you will with a single circuit system.

[maccers]

So the shell I believe is an SPi era as the engine (if fitted to that chassis as original) is an SPi albeit converted to carbs when I bought it. The holes in the bulkhead for the clutch and m/c look factory and not messed with. I'll see what I can do with the 3 pedal boxes I have...!

 

Just for more info, I dont feel any difference with the servo in all honesty and physically the pads and shoes are still the same size etc. Am running Cooper S 7.5 setup. Its already running a supercharger and all fits fine. Am removing engine for complete overhaul and looking at changing a few things while its all going to be in bits over the next few months.