Post by
ARKQX33V6 »
https://forums.nicoclub.com/arkqx33v6-u165721.html
Sat May 28, 2011 3:15 pm
Not to interfere with a sale, but these DC motors are cheap, in design, a possible fix is to check the motor out for working. If no work from the motor, check all wires especially the - ground. Then see if the motor has a set of carbon brushes, they may be stuck or too much carbon dust is misdirecting the DC to other parts of the motor. Clean lubricate and free up the brushes. If they are worn try a motor rewind shop for the same or bigger brushes and grind them down to fit.
Make sure the armature is good and commutator is undercut, round and clean.
The commutator has copper looking segments with spaces between, these spaces are mica insulators that need to be below the segments. When the commutator is worn the diameter is smaller and the segments and insulators are at the same level that that brushes make contact.
The brushes are semi-conductors and conduct when energized, but conduction is interfered with the mica insulator.
The motor are fractional HP but they produce torque through a gear head to move the seat. Max and min seat movement are limited so check the limits.