Warner Electric EUM-50_EUM-100_EUM-180_EUM-210_EUM-215 - Manual (Page 9)

9 Warner Electric • 800-825-9050 P-226 • 819-0355
Troubleshooting
With the motor at rest and locked out, check the
following:
A. Spin the output shaft by hand to ensure that it
turns freely.
B. If the unit fails to engage, first check the power
supply. Then remove the four screws of the
access panel on the side of the unit. With full
voltage applied to the clutch or brake, switch
back and forth between the clutch and brake
and observe the armatures (plates) through the
access hole. They should move back and forth
approximately 1/32'' when switched.
C. If a scraping sound is noted when the output
shaft is spun, it means an armature is dragging
slightly because of shock and displacement
during shipment. This is easily corrected.
Remove the four screws of the access panel
on the side of the unit. Insert a screwdriver
through the access hole and pry the dragging
armature (clutch or brake as observed) away
from the mating surface evenly all the way
around as far as it will move. Then apply power
to the magnet and insert the screwdriver
between the two armatures (back to back) to
nudge them evenly back into complete
contact. Pry only on the outer edge of the
armature to avoid damaging the autogap
assembly. This will reset the autogap in the
proper position and the unit should now be
ready for further assembly in the drive system
and normal operation. See Figure 10.
Replace the access panel on the assembly.
Figure 10