Maintenance; Changing Shoes/Motor/Brake; Setting Roller Support Limit Switch - Greenlee 855 Service Manual

Maintenance (cont'd)
Changing Shoes
1. Disconnect the bender from the power source.
2. Lock the bender head in the vertical bending posi-
tion (refer to "Pivoting the Bending Head" in the
"Setup" section of this manual).
3. Refer to the "1/2" to 1-1/4" Side Exploded View" or
the "1-1/2" to 2" Side Exploded View." Use heavy-
duty retaining ring pliers to remove the retaining ring
(26) that secures the shoe.
4. Remove the shoe from the spindle.
Drive lugs must
engage in
these holes.
5. Mount the replacement shoe onto the spindle. Align
the slot in the shoe bore with the screw head on the
spindle. Push the shoe onto the spindle until the
drive lugs are fully engaged in the drive lug holes.
Replace the retaining ring.
Motor
The motor commutator brushes should last for about
1000 hours of normal use but will eventually need to be
replaced.
1. Disconnect power to the unit.
2. Remove the motor cover.
3. Remove the power cord strain relief.
4. Remove the two nuts securing the shroud to the tail
of the motor and remove the shroud.
5. Push in the commutator brush retainer and move it
toward the brush to release it. Unplug the brush and
remove it. Replace it if the length is less than 1/4".
6. Reassemble in reverse order.
Greenlee / A Textron Company
Setting Roller Support Limit Switch
The switch is activated by the main outer roller support
arm, in the retracted position. Retract the switch from
the maximum switch travel by pivoting the switch in its
mounting holes and rotating it clockwise in its mounting
slot.
Set the squeeze adjustment at the maximum clockwise
position. Move the switch in a counterclockwise direc-
tion (with a 0.030" feeler gage between the roller arm
and the body). When the roller, arm, gage, and switch
body are in contact, tighten the mounting screws.
The switch lockout circuit is normally closed. Attach
alligator clips to the common and normally closed
switch terminals to check switch trip operation.
Do not insert meter probes into the Molex
Brake
Under normal circumstances the brake should not
require adjustment. However, if the brake can be heard
dragging while bending or if the braking performance
deteriorates, brake adjustment may be necessary.
Do not touch the brake if the bender
has been recently used. It will be hot.
Wait an hour for it to cool off before
adjusting.
1. Disconnect power to the unit.
2. Remove the motor cover.
3. Loosen the two set screws on the brake rotor hub
(the part that turns).
4. Slide it to a position 0.002" to 0.015" away from the
mating face (about 1 to 3 page thicknesses of this
manual).
5. Tighten the set screws to 4 Nm (35 in-lb).
6. Replace the motor cover.
10
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
855 Smart Bender
plug.
®
®