Safety is essential in the use and maintenance of
Greenlee tools and equipment. This instruction manual
and any markings on the tool provide information for
avoiding hazards and unsafe practices related to the
use of this tool. Observe all of the safety information
provided.
Greenlee / A Textron Company24455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
Page 3
IMPORTANT SAFETY INFORMATION
SAFETY
ALERT
SYMBOL
This symbol is used to call your attention to hazards
or unsafe practices which could result in an injury
or property damage. The signal word, defined below,
indicates the severity of the hazard. The message
after the signal word provides information for preventing or avoiding the hazard.
Immediate hazards which, if not avoided, WILL result
in severe injury or death.
853 Quad Bender™
Electric shock hazard:
• Connect the power cord to a 120
volt, 20 amp receptacle on a
ground fault protected circuit only.
See Grounding Instructions.
• Do not modify the power cord or
plug.
• Inspect the power cord before use.
Repair or replace the cord if
damaged.
• Disconnect from power before
servicing.
Failure to observe this warning could
result in severe injury or death.
Hazards which, if not avoided, COULD result in severe
injury or death.
Hazards or unsafe practices which, if not avoided,
MAY result in injury or property damage.
Read and understand all of the
instructions and safety information
in this manual before operating or
servicing this tool.
Failure to observe this warning will
result in severe injury or death.
Do not use this tool in a hazardous
environment. Hazards include
flammable liquids, gases, or other
materials. Using this tool in a hazardous environment can result in a
fire or explosion.
Failure to observe this warning will
result in severe injury or death.
• Do not expose to rain.
• Do not use in wet or damp
locations.
Failure to observe these warnings
can result in severe injury or death.
Wear eye protection when operating
or servicing this tool.
Failure to wear eye protection could
result in serious eye injury from
flying debris.
Do not remove guards.
Failure to observe this warning could
result in severe injury or death.
Greenlee / A Textron Company34455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
Page 4
853 Quad Bender™
IMPORTANT SAFETY INFORMATION
Extension cords:
• Use only three-wire, 12-gauge
extension cords that have threeprong grounding-type plugs and
three-hole receptacles that accept
the tool’s plug.
• Do not use extension cords that
are longer than 30 m (100').
• Repair or replace damaged
extension cords.
Failure to observe these warnings
can result in severe injury or death.
Make sure that the handle is properly installed and
secured with the safety spring clips and snap pins
before lifting or moving the bender. An improperly
installed handle could allow the bender to fall,
injuring nearby personnel.
Failure to observe this warning can result in severe
injury or death.
• Conduit moves rapidly as it is bent. The path of
the conduit must be clear of obstructions. Be sure
clearance is adequate before starting the bend.
• Do not operate the bender while wearing loose
clothing. Loose clothing can get caught in moving
parts.
• Inspect the bender before use. Replace worn,
damaged or missing parts with Greenlee replacement parts. A damaged or improperly assembled
component could break and strike nearby personnel.
• Some bender parts and accessories are heavy
and may require more than one person to lift and
assemble.
• Use this tool for the manufacturer’s intended
purpose only. Use other than that which is
instructed in this manual can result in injury or
property damage.
Failure to observe these precautions can result in
injury or property damage.
Pinch points:
Keep hands away from bending
shoe, rollers and conduit when
bender is in use.
Unplug the bender before changing accessories.
Accidental startup can result in serious injury.
Greenlee / A Textron Company44455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
Page 5
853 Quad Bender™
Handle Removal and Replacement
The handle of the 853 is removable. This feature is
convenient when performing complex bending, and
makes it easy to replace a damaged handle.
Removal
1. Place the bender in the upright position.
2. Release the spring clip on the safety snap pin.
3. Remove the pin from the handle and the sleeve of
the frame.
4. Repeat for the other end of the handle.
5. Lift the handle to remove.
Replacement
1. Insert the handle into the sleeves of the frame.
2. Align the holes in the handle with the holes in the
sleeves.
3. Insert the safety snap pin. Ensure that the pin goes
through the handle and the sleeve on the frame.
4. Engage the safety spring clip over the end of the pin.
Ensure that the loop on the clip is completely around
the pin.
5. Repeat for the other end of the handle.
Transporting the Bender
Make sure that all components used to lift this bender
are properly rated for the 202 kg (445 lb) weight. Use
a ramp to load and unload the bender from a truck or
other vehicle that is not equipped with a lift gate.
To lift the bender, loop a nylon or polyester sling through
the spindle. Thread one end of the sling through the
length of the spindle as shown. Securely fasten to lifting
device.
Lifting Bender
Removing or Replacing Handle
safety
snap
pin
Make sure that the handle is properly installed and
secured with the safety spring clips and snap pins
before lifting or moving the bender. An improperly
installed handle could allow the bender to fall,
injuring nearby personnel.
Failure to observe this warning can result in severe
injury or death.
Lift bender using a nylon or polyester sling through
the spindle. Do not attempt to lift bender by the
handles. Make sure all lifting components are
properly rated for the 202 (445 lb) weight.
Failure to observe this warning can result in severe
injury or death.
Greenlee / A Textron Company54455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
Page 6
Maintenance
There is no need for periodic flushing and replacing of
lube in the bender gear box since it is sealed and locked
tight. However, if the box is opened for repair and the
lube is lost or contaminated by dirt, then the box and
parts should be flushed out and filled with 26 fluid
ounces of Mobil® 634 synthetic oil.
Flushing should be accomplished with kerosene, which
is a petroleum hydrocarbon that does not affect seals.
Note: Aromatic hydrocarbons such as benzine,
chlorinated solvents such as carbon-tetrachloride, and
ketones such as acetone should never be used for
flushing as they are solvents for rubber. They are also
harmful to the environment.
Chain Adjustment
853 Quad Bender™
Eight Reductor
Mounting Bolts
(four on reverse side)
Disconnect this tool when not in use,
before servicing or adjusting, and
when changing shoes or conduit
rollers and supports.
Failure to observe this warning could
result in severe injury or death.
Both chains have to be adjusted if the final drive #60 chain
is to be reset. Refer to the Exploded View and Parts List.
1.
Remove the front cover (38) and upper rear guard (37).
2. Loosen the eight mounting bolts for the reductor (19).
Remove the eccentric cam and move the reductor to
create chain slack.
3. Remove the four retaining screws for eccentric
adjustment. Rotate to remove slack from the chain
and align with one of the two sets of holes in the
frame. Remount the eccentric with the four bolts.
4. Slide the reductor in slotted mounting holes to the
retension chain. Set tension with the eccentric cam.
With the eight reductor mounting bolts (22, 24) loose,
rotate the eccentric cam with a 1/2" square drive to
tension the chain. Torque the eight reductor mounting
bolts to 47 Newton-meters (35 ft-lb).
Two eccentric cam mounting
holes provided for varying
Reductor
Mounting Bolt
1/2" Square
Rotate eccentric cam counterclockwise.
Apply 20 Newton-meters (15 foot-pounds) of torque
to set chain tension. Then torque reductor mounting
bolts to 47 Newton-meters (35 foot-pounds).
adjustment positions.
Eccentric Cam
Tab on
Reductor Bracket
Greenlee / A Textron Company64455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
#60 HT Final
Drive Chain
Positioning Plate on
Eccentric Housing,
Counter Shaft
Four 1/4" Flange
Mounting Screws
Page 7
Maintenance (cont’d)
Electrical Control Unit Removal
Disconnect power supply before
servicing bender. Servicing to be
done only by trained service
technician.
Failure to observe this warning could
result in severe injury or death.
853 Quad Bender™
Electric shock hazard:
Disconnect the unit from power
before servicing.
Failure to observe this warning can
result in severe injury or death.
1. Remove the cover retained by ten 5/16" hex screws.
2. Disconnect the pendant switch plug from the circuit
board and remove through the cord grip.
3. Remove two hex mounting screws, one on each side.
3/8" Hex
Mounting Screw
4. Remove the motor leads, power cord ground wire,
and neutral wire before the control unit can be totally
removed from the bender.
Line Connection
at Circuit Breaker
Wear eye protection when operating
or servicing this tool.
Failure to wear eye protection can
result in serious eye injury from
flying debris.
Roller Support Maintenance
Clean and lubricate roller supports every 6 months, or
more often if the bender is used in dusty or corrosive
environments.
Refer to the exploded view of the bridge assembly when
performing the following procedures.
1" Roller Support
1. Disconnect the bender from the power source.
2. Remove shoulder bolt (40) and nut (41). Remove
1" arm (1).
3. Remove retaining ring (39). Remove 1" roller (5).
4. Spray a motorcycle chain or high quality axle grease
on shaft of the 1" arm (1).
5. Lubricate the shoulder bolt (40).
6. Wipe away any excess lubricant.
7. Assemble in reverse order.
Greenlee / A Textron Company74455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
Page 8
Maintenance (cont’d)
853 Quad Bender™
1-1/4" to 2" Roller Support
1. Disconnect the bender from the power source.
2. Remove the shoe and bridge assembly.
3. Place bridge on stable work surface. Use a pair of
needlenose pliers to disconnect the spring (48) from
the hole in the bridge beneath the roller support unit.
4. Remove the squeeze adjustment arm screw (38)
and arm (32).
5. Remove the three button head cap screws (37) and
adapter sleeve (33).
6. Place one hand under the support arm (2) to support
the weight of the roller support unit. Remove the
eccentric shaft (4).
Note: You may need to rotate the eccentric shaft to
remove it.
Pinch points:
Use both hands to hold the lead and
tail rollers to prevent the rollers from
pivoting.
Failure to observe this precaution
could result in injury or property
damage.
7. Lift bridge weldment (3) off of roller assembly.
8. To separate 1-1/4" and 1-1/2" roller assemblies:
Loosen the sleeve set screw (36) and remove the
1-1/4" to 1-1/2" pivot roller shaft (28). Remove the
sleeve (30).
9. On the 1-1/4" roller group:
• Remove two hex head screws (34). Remove the
outer roller plate (14).
• Remove the tail roller (7) and lead roller (6).
10. On the 1-1/2" roller group:
• Remove two hex head screws (34). Remove the
outer roller plate (14).
• Remove the tail roller (10).
• Remove all components of the split roller
assembly.
11. On the 2" roller group:
• Loosen the sleeve set screw (36) and press out
the 2" pivot shaft (29). Remove the sleeve (31).
• Remove the hex head screw (34). Remove one
retaining ring (35) from the tail roller shaft (26).
Remove outer roller plate (15).
• Remove the tail roller (9) and center roller (8).
• Remove all components of the split roller
assembly.
12. Clean off all of the grease and dirt.
13. Inspect each item. Replace any worn, damaged,
or missing items.
14. Lubricate all working surfaces with a high-quality
grease.
15. Replace all components in reverse order, noting the
following:
• On split roller groups: To ease the assembly of
the split roller subassemblies, begin by slipping
the O-rings onto the side plates. Assemble the
split roller subassemblies as shown, then slip the
O-rings into their correct positions.
• On the 2" roller group only: After replacing any
split roller components, add or remove shim
washers (42, 43, or 44) as needed.
• On the 1-1/2" roller group: Install the two Belleville
washers (21) so that the inside diameters contact
each other.
• Use Loctite® 271 on the hex head screws (34).
Torque to 55 to 61 Nm (40 to 45 ft-lb).
16. Position the roller support arm (2) as shown.
Assemble the roller groups to the support arm.
17. Place the bridge weldment (3) over roller assembly.
18. Insert the eccentric shaft (4).
Note: You may need to rotate the eccentric shaft to
get it to seat completely.
19. Install the adapter sleeve (33) and three button head
cap screws (37).
20. Install the adjustment arm (32) and adjustment arm
screw (38).
21. Attach the spring (48) to the holes in the bridge
beneath the roller support unit.
Greenlee / A Textron Company84455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
Page 9
853 Quad Bender™
Troubleshooting
ProblemProbable CausePossible Remedy
Bender will not operate.No voltage.Check supply voltage circuit operation.
Check that switch is on.
Bends are overbent a fewPointer is adjusted wrong.Loosen pointer locking screws and
degrees.rotate clockwise to compensate.
Retighten locking screws.
Too much squeeze on 1-1/4", 1-1/2"Back squeeze off per adjustment
or 2" EMT, IMC or Rigid Aluminuminstructions.
conduit.
Unusual conduit characteristics.Bend smaller angle to compensate.
Bends are underbent a fewPointer is adjusted wrong.Loosen pointer locking screws and
degrees.rotate counterclockwise to compen-
sate. Retighten locking screws.
Too little squeeze on 1-1/4", 1-1/2"Increase squeeze per adjustment
or 2" EMT, IMC or Rigid Aluminuminstructions.
conduit.
Unusual conduit characteristics.Bend larger angle to compensate.
Bender stops bending.Current overload.Rigid conduit is being bent with roller
support engaged. Retract roller
assembly. Conduit is bent past 105°
and hook has contacted unbent conduit.
Press UNLOAD and remove overbent
conduit.
Greenlee / A Textron Company94455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
Page 10
Troubleshooting (cont’d)
853 Quad Bender™
The following flow charts show the suggested troubleshooting procedures for some bender problems. They by
no means encompass all possible problems or solutions.
Electric shock hazard:
• Contact with live circuits can result
in severe injury or death.
• Some troubleshooting steps
require power to the bender.
This type of troubleshooting step
should only be performed at
authorized Greenlee service
centers by personnel who are
familiar with safe troubleshooting
procedures.
Failure to observe these warnings
could result in severe injury or death.
Won’t bend
Plugged into dead circuit,
Is 115 VAC measured at
PGU BOARD input?
YES
Does the green LED on
the I/O BOARD light?
YES
Does the green LED on
the PGU light?
YES
Does amber or red LED
on IO light when BEND
or UNLOAD is pressed?
YES
Does relay on IO
operate when BEND or
UNLOAD is pressed?
YES
Replace PGU.
NO
bad power cord, or
switch is bad or off.
NO
Replace transformer unit.
NO
Replace PGU.
Unplug pendant or IO and
NO
check switch for continuity.
If ok, replace IO.
NO
Replace IO.
Trips circuit breaker
Are the proper support rollers
and shoe groove being used for
the type and size of conduit
being bent?
YES
Is the current on the 115 VAC
line exceeding 20 amps?
YES
Is the DC current to the motor
exceeding 17 amps?
NO
When BEND is pressed, is the
voltage sent to the motor 20 to 50
volts over the AC line voltage?
YES
Are connectors corroded?
NO
Replace PGU.
NO
NO
YES
NO
YES
Won’t stop
Is the supply line voltage low?
NO
Does bender stop when the
pendant is unplugged?
NO
Replace PGU.
YES
YES
Bender only runs in one direction
Does amber or red LED light
when switch is pressed?
YES
When amber or red LED is on, is
12 VDC measured at large relay
coil on PGU (where relay wire
unit connects)?
YES
Replace 918 6645.6 relay.
NO
NO
Follow directions in
instruction manual.
Replace circuit
breaker.
Replace motor.
Replace
bridge rectifier
(918 5997.2).
Clean.
Use 115 VAC.
Replace pendant
switch.
Check and replace
pendant switch.
Move six-wire
connector on PGU
from “to I/O” to
“test.” Alternately
press BEND and
UNLOAD. Does
yellow “direction”
LED on PGU turn
on and off?
Greenlee / A Textron Company104455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
NOYES
Replace PGU.Replace I/O.
Page 11
Quick diagnostics for electronic problems
1. With bender unplugged, switch six-wire connector on
PGU from “To I/O” to “Test.”
2. Plug unit in.
3. Press BEND. Contactor on I/O will activate.
• If not, check for 12 VDC at contactor coil
— If 12 VDC is present, replace contactor
918 6645.6—else replace I/O
• If bender runs, replace PGU.
• On PGU near “test” connector:
Green “Power” LED is ON
Yellow “Direction” LED is OFF
Red “PWM” LED slowly turns dimly on
If not, replace I/O.
4. Press UNLOAD. Contactor on I/O will activate.
•If not, check for 12 VDC at contactor coil
— If 12 VDC is present, replace contactor
918 6645.6—else replace I/O
•On PGU near “test” connector:
Green “Power” LED is ON
Yellow “Direction” LED is ON
Red “PWM” LED slowly turns dimly on
If not, replace I/O.
5. Press BEND. With insulated object, carefully press
black button “S1” on PGU. Bender will run slowly.
If not, replace PGU.
853 Quad Bender™
Greenlee / A Textron Company114455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
Page 12
Exploded View — 853 Quad Bender
26
27
Note: Key supplied
with item #19
(reductor)
853 Quad Bender™
25
39
22
47
24
41
19
71
54
79
74
18
30
28
76
78
52
59
17
20
78
37
31
36
73
21
42
77
12
14
34
32
70
11
9
35
7
44
43
58
40
46
45
75
72
80
1
8
24
23
29
89
54
7
49
11
2
88
77
141
142
BEND
UNLOAD
Greenlee / A Textron Company124455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
5
10
14
13
24
16
15
3
38
5
6
48
Page 13
Parts List — 853 Quad Bender
KeyPart No.DescriptionQty.
1500 7275.7Weldment, main frame ...................................................................... 1
Greenlee / A Textron Company144455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
Page 15
Exploded View—500 7276.6 Bridge Assembly
1
853 Quad Bender™
39
5
38
32
51
3
50
49
33
4
40
37
41
52
53
45
46
Greenlee / A Textron Company154455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
Page 16
Exploded View—500 7276.6 Bridge Assembly (cont’d)
22
17
16
21
22
17
16
30
36
10
25
29
2
34
14
For all #34 screws:
apply a high-strength
thread-locking agent such as
Loctite 271 to the threads
and then tighten to 45 ft-lb.
34
11
6
14
853 Quad Bender™
12
47
48
7
24
34
Use slim washers #42, #43, #44
between the 2" ball (#19) and
outer plate (#15) to allow free
movement of the split roller
with no more than 1/32: axial
free play.
28
34
15
23
19
36
35
18
31
20
13
23
19
18
35
9
27
8
26
Greenlee / A Textron Company164455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
Page 17
Parts List—500 7276.6 Bridge Assembly
KeyPart No.DescriptionQty.
1500 7239.01" Arm weldment ............................................................................... 1