Bender Head Disassembly - Greenlee 855 Service Manual

Bender Head Disassembly (cont'd)
Spindle
1. Remove the chain (refer to "Chain" disassembly).
2. Remove the 1/2" to 1-1/4" shoe (refer to "Changing
Shoes" in the "Maintenance" section of this manual).
3. Loosen the 1/2" to 1-1/4" drive plate hub set screw.
4. Remove the socket head screw in the 1/2" to 1-1/4"
spindle.
5. Remove the drive plate and key.
6. Use a file to remove any raised edges from the
spindle to prevent bearing damage.
7. Remove the spindle/sprocket.
8. Reassemble in reverse order.
Limit Switch Bracket
1. Remove the spindle (refer to "Spindle" disassembly).
2. Remove the four screws securing the two limit
switches, and remove the switches.
3. Remove the two screws securing the bracket and
remove the bracket.
4. Reassemble in reverse order, noting the following:
• The limit switch with red wires goes on top.
• Install the top switch so that the trip roller is as far
left as possible, as viewed with the switch behind
the bracket.
• Install the bottom switch (black wires) with the trip
roller as far right as possible, as viewed with the
switch behind the bracket.
• Temporarily install both shoes before installing the
chain.
• Place 2" IMC in the bender and rotate the shoe
until the conduit locks up against tail roller. (Do not
raise the support rollers as is normal for IMC.)
• Slide the top limit switch until the contacts trip
and tighten in that position.
• Place 1/2" rigid in the bender and rotate the shoe
until the conduit locks up against the support roller.
• Slide the bottom switch until the contacts trip and
tighten in that position.
• Rotate the spindle, checking that the limit switch
trip bolts do not snag the trip rollers. Readjust the
bracket mounting, if necessary.
1-1/2" and 2"
Limit Switch
Adj. Screws
Less Bend
Greenlee / A Textron Company
Less Bend
1/2" to 1-1/4"
Limit Switch
Adj. Screws
12
855 Smart Bender
Brake
1. Remove the eleven screws securing the motor
cover, and remove the cover.
2. Loosen the two set screws securing the brake rotor,
and remove the rotor.
3. Remove the power supply leads.
4. Remove the four screws securing the brake
housing, and remove the housing.
5. Reassemble the brake housing and power leads.
6. Use shims to set the brake rotor gap at 0.002" to
0.015" and tighten.
7. Replace the motor cover.
Optical Encoder
1. Remove the four screws securing the top cover, and
remove the cover.
2. Remove the seven screws securing the front guard,
and remove the guard.
3. Remove the nine screws securing the motor cover,
and remove the cover.
4. Rotate the motor until both hub set screws are
accessible.
5. Loosen the two set screws in the drive hub.
6. Unplug the encoder from the I/O board.
7. Remove the two mounting screws and round plastic
spacers securing the encoder, and pull off the
encoder.
Note: Attach a wire or string to the encoder plug at
the I/O board to serve as a retrieval line to pull the
new wire and plug up through the unit.
8. Reassemble in reverse order, noting the following:
• Torque the hub set screws to 0.16 Nm (22 in-oz).
• Jog the motor and check Quad 1 and Quad 2
LEDs for on/off pulsing.
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
®