Classic cars forum & vehicle restoration.

[GAZ5855]

Hi all, Newbie here, I have just removed my master cylinder on my 1937 morris 8 series 2 and wish to replace the seals, I would be very grateful on some information on how to take the cylinder apart to tackle this, thanks in advance. Gary

[ukdave2002]

Hi Gary and welcome a few of us 8 owners are on the forum

Remove circlip ; 14 whilst taking the pressure of it by pushing on to the piston with the rod :18 or a screwdriver.



Then with the circlip removed slowly take the pressure off the piston.

Dave

[GAZ5855]

Thanks so much Dave, though I can't see a circlip? Did they all have them?

[goneps]

Something must be preventing the piston from popping out under spring force. If the unit is still mounted on the chassis, I hope it's not merely restrained by the pushrod (18 on the diagram).

Richard

[Rosco663]

Gidday Gaz,

Welcome to the forum

Both Dave and Richard are correct. Hopefully the following will help to identify the part (H45) in question. Once parts H41 - H48 are inserted in the correct order as per the schematic. The circlip is housed in the machined groove of the Barrel and Supply Tank (H38). The circlip goove is found on the left side of this part as per the schematic.




I have a Series I and the circlip on mine didn't have the Internal Circlip plier holes as per Dave's schematic but champhered ends - I replaced it with a conventional circlip as part of the rebuild.



Following is a cut away of a similar single circuit master cylinder. Make sure all the parts a scrupulously clean. The parts and cyliner bore are very easy to gat clean but the actual reservoir on the Lockheed Master Cylinder is very hard to access (unless you desolder everything). But no debris should be present - at all Pay particular attention to the Compensating Port if this gets blocked the brakes can lock on



Good luck with your project. Put up some pictures, I'm sure they would be appreciated by all.

Cheers
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Rosco

[ka]

Do you have any thoughts on the brake cylinder rebuild grease that is available?
_________________
KA

Better three than four.

[Penguin45]

Red rubber grease is what you want.

P45.
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'67 Wolseley MkI 18/85, '70 Austin MkII 1800 The Landcrab Forum.

[goneps]

Never used rubber grease myself, but on the Morris Register forums there have been adverse comments from those who have, claiming that it congeals over time and clogs up the action of the pistons. Could it be that too much was used?

I've just reconditioned the slave cylinders on my Eight and did it the old-fashioned way, lubricating the cups with a smear of brake fluid.

Richard

[ka]

Yes I have always just lubricated with brake fluid, but just wondered.
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KA

Better three than four.