Warner Electric Autogap New ER-1225 and ER825 - Manual (Page 6)

6 Warner Electric • 800-825-9050 P-230-1
Step 10: Using a hex key wrench, tighten the
hub bushing screws (item 12) alter-
nately and evenly until tight. Using a
drift, tap lightly at several points
around the circumference against the
large end of the bushing with a small
hammer. Repeat this alternate tapping
and re-tightening until the specified
wrench torque no longer turns the
screw after tapping. Tighten the screw
to 15 lb.ft. torque using a torque
wrench.
The airgap between armature and
magnet must be .062 to .125 inch. If
the airgap is outside of that range,
reposition the armature hub assembly
by repeating steps 1 and 2 of the dis-
assembly procedure and steps 8, 9,
and 10 of the assembly procedure.
Step 11: Apply power to the brake and remove
shims. Set the airgap by pressing the
armature into contact with the magnet
and then releasing as shown in Figure
5. The armature should spring back
approximately 1/32- 3/64 (.031-.045)
inch. If the airgap is outside of that
range, reposition the armature hub
assembly by repeating steps 1 and 2
of the disassembly procedure and
steps 8, 9, and 10 of the assembly
procedure.
Step 12: Burnish the brake as follows: Start
and stop the escalator 30 times.
Allow 5-10 seconds delay between
Start and Stop.
Step 13: Attach torque wrench to the end of the
motor shaft. Hold the wrench at the
handle, and pull it in the direction of
motor rotation in one continuous
motion (without any jerky motion) until
shaft movement is detected. The high-
est reading on the dial is the static
torque of the brake. This torque with-
out any system drag must be at least
400 lb.ft. for ER-1225 and 125 lb.ft. for
ER-825. If less, burnish the brake
again, repeating step 12. If the brake
does not meet the torque requirement
after two burnishing procedures,
replace the brake.
The brake installation procedure is now com-
plete. If the brake is equipped with a
tachometer, then reposition pulley if neces-
sary and reinstall the belt. For electrical
adjustments, see Montgomery Kone's
Instructions. If any other components of the
system were repositioned or disassembled,
use appropriate instructions for their proper
assembly or adjustments.