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Re Brake M/C
Posted: Wed Jun 10, 2009 10:42 am
by ruislipboy
Hope some one might be able to help me. A friend has been given a new brake m/c but it has been set up for use with disc brakes can he still use it on his car which is a 1968 four door Morris minor which just has normal brakes on it. As his m/c has gone u/s
Thanks
Posted: Wed Jun 10, 2009 10:55 am
by alex_holden
If it's a genuine Lockheed MC he could buy a repair kit, which would have the missing seal in it:
http://morrisminorspares.co.uk/shop/pro ... cts_id=470
Posted: Wed Jun 10, 2009 11:10 am
by jonathon
He will also need to swap the top cap and the rear one for the original items
Posted: Wed Jun 10, 2009 3:39 pm
by bmcecosse
Or fit disc brakes !
Don't see why it wouldn't work as is - will just need more regular adjustment of the brakes. That seal is present to take up slack in the system after the initial press of the pedal - but if not present, the brakes should still work ok - just may develop a long pedal rather more quickly.
Posted: Wed Jun 10, 2009 9:48 pm
by les
Best to fit the seal, don't mess with brakes, lockheed probably bothered for a reason!
Posted: Thu Jun 11, 2009 12:02 am
by rayofleamington
The cup seal alloys you to pump up the brakes when there's a small leak / some air in system.
As for the rear spigot for the external reservoir pipe - this can be blanked off very easily (been there, done that...)
Posted: Thu Jun 11, 2009 1:20 am
by alainmoran
If you have a spare M/C filling plug then I will buy it off you since I'm building a pressure bleed system at the moment and could use a new filler plug to replace the one I'm messing with.
Posted: Thu Jun 11, 2009 8:52 am
by bmcecosse
Does any other car have this 'pressure retention' feature in the braking system ? Eg Wolseley 1500/Austin A40 - cars that use very much similar/same brake parts - but with very different master cylinders. Certain that the early Minis with drum brakes did not have this feature.
Posted: Thu Jun 11, 2009 7:24 pm
by les
It may have something to do with the position of the m/c.
Posted: Thu Jun 11, 2009 11:38 pm
by bmcecosse
Indeed - you may be right! Yet there doesn't seem to be any problem when folks remove that seal - the brakes still work, and the rear cylinders then have no 'pressure retention' to keep them close to the drums.