Yes, it sounds like the master cylinder.
From 1995 through 2003, the piston and other rubber parts of the master
cylinders were changed. The piston and the rubber plunger are held
together
by a circlip. The center of the plunger cup is open, so that it can
fit onto the
back of the master cylinder. The master cylinder rebuild kit, Moss
Motors
part no. 182-910, has rubber components for old as well as new style
master cylinders. If you disassemble the master cylinder, and all
parts look
like those pictured in the MG TD/TF Workshop manual, section M,
brakes, then
you need the original kit, 180-910.
When installing the pressure seal on the piston, the one that goes on
the front
of the piston, make sure that it seats over the ridge on the piston.
Use a thin blade
screwdriver, once you get the seal pulled over the exterior of the
piston, and in
position, to ensure that the seal is properly straddling the ridge.
If you aren't sure,
try installing the piston into the cylinder backwards. If it takes a
little effort to push
the piston in, and a lot of effort to remove the piston, then the
seal has not seated
on that ridge. Run the thin blade screwdriver around the contact area
between the
seal and the piston, and test again. If it pulls out with some
effort, it is still not seated.
Remember, when installed, the spring pressure has to push the piston
back to the
rest position.
John Seim
Irvine, CA
On May 22, 2010, at 4:44 PM, jvk52td@aol.com wrote:
> Hi All,
>
> Last fall just before storage I lost the brakes on the TD and put
> off the
> bleeding project til this spring.
>
> All went well in the bleeding process and my brakes pumped up well
> and very
> stiff to the push on the brake pedal.
>
> Went out for a cruise today and brakes worked fine the first few
> pushes on the
> pedal and then all the way to the floorboard the pedal went, good
> thing for a
> convenient emergency brake !!!
>
> Then after letting up on pedal they were good again for the next
> few times and
> then again all the way to the floorboard. It then seemed like they
> would be
> good for 2, 3 or 4 times and then all of a sudden the pedal would
> bottom out
> but right after letting up on the pedal the next push would be good.
>
> Any suggestions ?? Seems like master cylinder problem, not sure if
> it is bad,
> needs parts or something else ....
>
>
> I was also looking on the Moss site at master cylinders and it
> seems it
> depends how old you cylinder is what parts are available. Are
> there other
> outlets for master cylinders or parts beside Moss ??
>
> John in IL
> ______________________________________________
>
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