New period correct early type master cylinders from Minispares.
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TIN TANK BRAKE MASTER CYLINDER SINGLE LINE 0.75" BORE - GMC153
"The GMC153 is the early 0.75" BORE BRAKE MASTER originally used on 1959 minis to approx 1963 with single front wheel cylinder per wheel drum brakes and most 997 Cooper with booster valve and 7" disc brakes. Also fits Austin A40 Farina Mk2.
Originally the top of this master cylinder would have either a removable union top shaped like a nut, or a smaller hexagonal nut shape machined into it, unfortunately these parts are no longer available,therefore the only alternative was to have this copy made with the flat topped shape as this was the version that was made once the hexagonal nut type ceased production.
This looks much more period correct than the later cone shaped top versions, and of course is the correct bore size to suit the early brake systems. This cylinder also has the original size small base foot."
http://www.minispare.../GMC153.aspx?04
TIN TANK CLUTCH MASTER CYLINDER FLAT TOP - AAU4969FLAT
"Flat top clutch master cylinder to suit PRE 65 minis.
Originally the top of this master cylinder would have had either a removable union or a small hexagonal nut shape machined into it, but neither of these options are available so the pipe goes directly into the flat top as per normal but the outlet is period correct.
The later master cylinders post late 1964 have a more pointed shape where the brake pipe comes out.
Ensure the correct DOT4 or DOT5.1 brake fluid is used as these cylinders are not designed to use anything else such as Castrol SRF for racing or any mineral fluid."
http://www.minispare...9FLAT.aspx?0603
There is also this more period correct 3" tall Cooper S master available, details below:-
TIN TANK COOPER S BRAKE MASTER FLAT TOP - GMC172FLAT
Correct flat top brake master cylinder for pre 65 Cooper S.
"Originally the top of this master cylinder would have had either a removable union or a small hexagonal nut shape machined into it, but neither of these options are available so the pipe goes directly into the flat top as per normal but the outlet is period correct.
The later master cylinders have a more pointy shape where the brake pipe comes out.
3" high canister as opposed to std Mini 2.3/8""
http://www.minispare...LAT.aspx?041001
Edited by mab01uk, 18 January 2024 - 07:18 PM.
