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One
of the many problems on an MMM car is the braking system. This is what
I do now to get it working as it should. It is obvious that every part
in the braking system has to be in good condition but there is always
the problem of worn brake drums. When the inside of the brake drum has
got bigger through wear or machining, the brake shoes and linings will
not match up perfectly. |
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Over the last few years I have tried different methods to skim the
non-asbestos brake linings to a perfect fit with the drums..
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have to use a slightly thicker brake lining than original to compensate
for the worn drums. So I made a dummy backplate with shoes and linings
to put in the lathe and turned everything down to a perfect fit with
the brake drum. One has to be very careful and take precautions that
nothing comes loose when turning this contraption in the lathe. This
worked quite well but I noticed some differences in the backplates. |
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The
top bolt is used to move the cutter downwards and cut the exact
diameter you want. When holding the bottom pulley and turning the
device on the hub the slide will move forward and the cutter will
slowly progress. If you want the cutter to come back then turn the
belt. There is no point in giving exact dimensions as they need to be
adapted to the slide.
It is a good idea to put two pieces of cardboard (0.5 mm thick) under the brake shoes before you start cutting. |
The brake lever will then have a minimal movement before it pushes the
whole brake lining against the drum.The big steel cylinder at the
bottom is just a balancing weight. It now takes about half an hour to
do the brakes on one car. You will see that now the drums will move
easily over the shoe and that there is no more cursing involved.
Happy Braking,
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| Stefaan Vernyns |
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