Warner Electric ER-1225 - Manual (Page 16)

16 Warner Electric • 800-825-9050 819-0466
Figure 21 - Seating the taperlock bushing.
Step 11: Apply power (60 VDC) to release the
brake . Remove the taperlock bushing
and armature assembly (Items 1,2,3)
from the motor shaft . With a hex key
wrench, remove both set screws (Item
12) from the taperlock bushing (Item 1) .
Insert one set screw into the previously
vacant hole in the taperlock bushing
and tighten this screw until the bushing
is loosened in the hub (Item 2) . If the
bushing does not loosen, tap on the hub
with a plastic hammer .
Do not pry the armature
away from the magnet. This can distort
the armature and require complete brake
replacement.
Step 12: Repeat Steps 6 ,7, 8, 9, and 10 .
Step 13: Make the electrical connections if they
have not been made . Apply power
(60 VDC) to the brake and remove the
shims . Set the airgap by pressing the
armature into contact with the magnet
and then releasing as shown in Figure
22 . The armature should spring back
approximately 3/64 ( .045) inches .
Figure 22 - Setting the airgap.
Step 14: If the brake includes temperature and
wear sensor wires, follow KONE Inc .
instructions to make proper connections .
Color coding is as follows:
Yellow wire(s) - temperature sensor
Red wire - 90% wear sensor
Black wire - 70% wear sensor
Step 15: Burnish the brake as follows: Start and
stop the escalator 30 times . Allow 5-10
seconds delay between each start and
stop .
Step 16: With power off, check brake static
torque, which must be at least 400 lb .ft .
excluding system drag . If less, repeat
Step 15 . If the brake does not meet the
torque requirement after two burnishings,
replace it .
Step 17: When the armature is released and
rotating freely, the armature working face
should not rub on the magnet working
face and the armature working face axial
runout (wobble) should not exceed .015
inch . If the armature rubs or wobbles
excessively, remove the armature
assembly and reassemble it as instructed
above . If the problem persists, replace
the brake .
Step 18: Brake installation is complete . Follow
KONE Inc . instructions to install the
remainder of the system .