The MCs with the ring around them had a different main seal (not a plain cup)- it fitted over the piston similar to the bottom seal.
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| Mk1 master cylinders https://www.ausmini.com/forums/viewtopic.php?f=2&t=35825 |
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| Author: | 66S [ Mon Sep 17, 2007 2:10 pm ] |
| Post subject: | Mk1 master cylinders |
Hi guys, What is the deal with Mk1 brake master cylinders? Some have an identifying ring at the base and some don't. I used to know but cannot recall right now. Regards Al |
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| Author: | drmini in aust [ Mon Sep 17, 2007 2:22 pm ] |
| Post subject: | |
The MCs with the ring around them had a different main seal (not a plain cup)- it fitted over the piston similar to the bottom seal.
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| Author: | 66S [ Mon Sep 17, 2007 2:29 pm ] |
| Post subject: | |
Hi Kev, Thanks for that. I seem to recall there was a change date, any ideas? Al |
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| Author: | drmini in aust [ Mon Sep 17, 2007 4:42 pm ] |
| Post subject: | |
Sorry, no idea- you need a dude with a parts book. Morris 1100.. where are you??? 
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| Author: | Morris 1100 [ Mon Sep 17, 2007 6:33 pm ] |
| Post subject: | |
I have just looked through my parts books and I can't find a changover date. I have a 69 Mini parts book (just before the change from Deluxe to K) and a last edition Morris 1100 parts book from about 72 and neither of them mentions a change. Karcraft shows both part numbers in their catalogue but no date. Ring = two "ring" seals. Part number BAU1247 No Ring = one "ring" and one "cup" seal. Part number 50957 |
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| Author: | Mick [ Mon Sep 17, 2007 7:09 pm ] |
| Post subject: | |
Can anyone describe the 'ring' a little better? I have a number of MC's here, but the only differences I see are in the top where the brake line union screws in. |
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| Author: | Anto [ Mon Sep 17, 2007 7:12 pm ] |
| Post subject: | |
The groove varies, sometimes it is on the bottom part below the reservoir, other times it is on the reservoir itself. It is basically a groove that runs all the way around the master cylinder. Sometimes it's hard to see if the m/c is dirty. |
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| Author: | Timbo [ Mon Sep 17, 2007 7:21 pm ] |
| Post subject: | |
Do you have any that look like these? 
Tim |
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| Author: | Morris 1100 [ Mon Sep 17, 2007 7:27 pm ] |
| Post subject: | |
This should explain it better. 
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| Author: | Mick [ Mon Sep 17, 2007 7:37 pm ] |
| Post subject: | |
Sorry Timbo, none like that one I am afraid...I had a look last time you said you were hunting for them..on a bright note though, I still have a rivetted 3.5 inch rim in careful storage around the back! I had a look through the MC's again, one has a ring around the taper down at the top of the MC. it is quite distinct having been cut in by a lathe. The bore is .75 and (obviously later down the track ) stainless steel lined. |
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| Author: | Timbo [ Mon Sep 17, 2007 9:00 pm ] |
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Mick wrote: Sorry Timbo, none like that one I am afraid...I had a look last time you said you were hunting for them..on a bright note though, I still have a rivetted 3.5 inch rim in careful storage around the back!
Oops sorry, I'll get on to that this week! Tim |
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| Author: | Mick [ Mon Sep 17, 2007 9:01 pm ] |
| Post subject: | |
No stress, it's doing no harm around the back. |
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| Author: | 66S [ Tue Sep 18, 2007 9:39 am ] |
| Post subject: | |
Hi folks, Thanks for your help, I'll keep trying to find a change date and report if I do. Regards Al |
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