|
excessive arcing on central vacuum motor brushes?
QUESTION: I had to replace the brushes on the Vacu-maid central vacuum lately (it has
a Lamb motor). When it runs, it arcs way too much, running until the safety
relay cuts out to turn it off (it is also pretty hot at this point).
Any ideas what is wrong? I used a special type of stone to clean off the
copper commutator that comes in contact with the brushes (I realize that
there should be some sparking, but this sparks way too much). Maybe the
commutator is too worn to make an even contact with the new brushes?
Anyone have any ideas?
ANSWER: Sounds like you better think about a major overhaul here. At the least the
commutator should be machined smooth and the motor windings checked for shorts
and /or grounds. Stop gap measures could easily kill the motor. If it's already
on the way out you'll not waste time trying to revive a corpse. Check
replacement motor costs vs. service and repair costs and then decide. Good
luck.
Or maybe the brushes where not fitted to the commutator? did you take
some sand paper and turn it back ways on the commutator and then leave
the brushes in place and then turn the commutator back and forth with
the sandpaper to wear the brushes down to the correct arc? so they
will fit the commutator?
worth a try.
|
|
|
|
