Maintenance; Adjustments; Greenlee Textron - Greenlee 855 Instruction Manual

Adjustments (cont'd)
Retention Cam
Loosen the screws securing the retention cam. With the
bender oriented in the vertical position, rotate the round
plate until the right side edge of the cam is pointed
straight down or within 1/4" left of being straight down.
Make sure both ends of the spring are engaged in the
holes of the cam and round plate. Tighten the screws
while holding the round plate in position with pliers to
prevent it from rotating.
Check to make sure the roller support handle will fully
engage and retract without catching on the cam holding
surface. This should be done in both the vertical and
horizontal bending positions. It should also be done with
the cam positioned as far left and as far right as friction
will allow it to stay.
Cam Holding
Surface
Once everything is tightened down in the proper posi-
tion, push in the limit switch trip arm. You should hear
the switch click on. If not, loosen the two screws and
nuts and slide the switch to the right and retighten.
Push the cam toward the switch to make sure any free
play will not trip the switch.
Arm
Rotate the cam until the switch trip arm rides up on top
of the tripping surface of the cam. You should hear the
switch click on. If not, move the switch to the left to a
point where it does. You should hear the switch click off
when the cam is released. If you cannot move the
switch enough to get it to trip properly, use needlenose
pliers to slightly bend the arm.
Greenlee Textron / Subsidiary of Textron Inc.
855 Smart Bender™
1/4"
Tripping Surface
of Cam
Limit
Switch

Maintenance

Chain Lubrication
Lubrication of the drive chain is recommended every
six months (more often if used in dusty or corrosive
environments).
1. Disconnect power to unit.
2. Remove the 1-1/2" to 2" shoe.
3. Remove the lower front guard.
4. Spray a motorcycle chain lubricant on the inside of
the chain between the sprockets while pressing
UNLOAD until the entire length of chain has been
covered (do not spray on the encoder beneath the
drive sprocket).
5. Replace the guard and shoe.
Chain Adjustment
Check the free play in the chain every time the chain is
lubed. If the total play halfway between the sprockets is
more than 1", adjust the chain.
1. Disconnect power to unit.
2. Remove the 1-1/2" to 2" shoe.
3. Remove the front lower guard and the motor
cover.
4. Loosen the two motor mounting bolts on the front of
the bender and the two mounting bolts and one nut
on the back.
5. Turn the lower bolt on the front clockwise until all
chain slack is removed. While maintaining tension,
tighten the nut and two front bolts.
6. Tighten the two rear bolts.
7. Replace the motor cover, guard and shoe.
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 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 .002" to .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.
30 4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070