In a message dated 4/8/98 7:06:57 PM Pacific Daylight Time, mxr125@erols.com
writes:
<< During an inspection of my rear
brakes I discovered a few fine hairline cracks in the steel liner of my
rear brake drums.These are the original 10" factory aluminum alfin
competition type. Has anyone had a similiar problem and/or does anyone
know if the steel liner can be replaced and if so,who does this kind of
work. The drums are rare and I don't want to chance destroying them.
George Wright ,Virginia >>
<snip>
Not to worry about small cracks. On bigger cracks; if the edge gets blue,
polish
it down. The drum is cast over the liner, so replacing that is not really an
option. Make certain that the shoes are not dragging, and that the support
posts (felt still on them?) are adjusted so that the linings are side-to-side
true
to the axle C/L; and that the backing plates are not bent. Check to see if
the drums are out of round or "bellmouthed".
The drum's working surface probably has "hard spots" so see if you can have
them ground, not turned; But only if Really Necessary!!! Discuss the meaning
of continued life to anyone working on these drums!
The 10" units are worth the effort/risk to run if you are serious. They do
make
noises when they cool after a race.
BTW I remember TRF or Moss advertising 9" replicas a while ago. The real
factory 9" drums just had ribs running around the drum OD, not the right
angle fins of the Z or 10" drums. Both factory drums were made by
Wellworthy: the 10" markings are: AL-FIN AFD509-02
Regards, Hardy
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