Ahh the dreaded brake groan. From the RV-list message number 102873
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This is really ..... me off. You know that groan the brakes make when you
stop in a 757. You know the kind that makes the whole plane shake? Well this
is happening to me. I have relined the brakes twice for good measure,
scuffed and cleaned the rotor, replaced the fluid in that line, used that
blue goopy stuff for cars, repacked the bearings twice, with no luck. Van's
says they don't know and have only heard of this once, Cleveland actually
told me this is VERY common in all rv models.
........
I ended up shimming the pad to caliper with an .020 piece
of alum. Basically what you are trying to do is to have a little pressure on
the trailing edge of the brake pad, as the tire rotates. So make a shim,
with a hole for the caliper pin to fit through to hold it in place, on the
up side of the pad, so that as the wheel rotates, the trailing side of the
pad has a little more pressure than the leading edge of the pad. Again as
the wheel rotates. The groan is acting much like an eraser on a pencil when
you push it across a table. One way it slides, another way, it skips. It's
the skipping of the pad that is likely causing the groan. I spent many
hours figuring this out on mine.
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Best,