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Miller Du-Op Quick
Specs
Weld meters digital ammeter
and presettable voltmeter allow
monitoring of welding output for
each welder.
Multi-arc welding is here! One
dependable engine and two high-
performance arcs allow operators
to work independent of each other.
Its a one-of-a-kind, go-anywhere
engine drive.
Miller Du-Op
�
Engine-Driven
Welder/Generator
Issued May 2008 Index No. ED/10.9
Thermal overload protection
prevents machine damage if the
duty cycle is exceeded or airflow
is blocked.
Two 14-pin remote controls can
be used for precise adjustment
of amperage or voltage along
with contactor.
Increase profits with this multi-arc
machine by completing even your
most demanding jobs in half the
time compared to conventional
engine-driven welders. With two
arcs in one engine drive, fewer
machines are required for a job.
Double the amperage output
with a switch that parallels both
outputs to a single side. This
provides a safe and easy way to
run large electrodes, stud weld,
or carbon-arc gouge.
5,500 watts of AC generator
power independent of welding
output. Two 120 V, 20 A GFCI
duplex receptacles. Two 230 V,
20 A duplex receptacles.
Hot Start provides positive stick
electrode starts to make it easy
to start all types of electrodes.
The Power of Blue
�
.
Welder/generator is warranted by Miller for 3 years, parts and labor.
Engine is warranted by Deutz for 2 years.
Miller Electric Mfg. Co.
An Illinois Tool Works Company
1635 West Spencer Street
Appleton, WI 54914 USA
Web Site
www.MillerWelds.com
International Headquarters
Phone: 920-735-4505
USA FAX: 920-735-4134
Canadian FAX: 920-735-4169
International FAX: 920-735-4125
Heavy Industrial Applications
Pipe Welding
Structural
Processes
Stick (SMAW)
MIG (GMAW)
Flux Cored (FCAW)
DC TIG (GTAW)
Air Carbon Arc (CAC-A)
Single Weld Mode:
3/8 in (9.5 mm) Carbons
Dual Weld Mode:
1/4 in (6.4 mm) Carbons
Output Range
Single Weld Mode: (Right side) CC/DC 30 600 A
Dual Weld Mode: (Both sides) CC/DC 15 300 A
CV/DC 10 32 A
Weld Output Rated at 104�F (40�C)
Single Weld Mode: 550 A at 30 VDC, 40% Duty Cycle
Dual Weld Mode: 275 A at 31 VDC, 40% Duty Cycle
Generator Output Rated at 104�F (40�C)
5,500 Watts Peak 4,000 Watts Continuous
Weight
Net: 2115 lb (959 kg) Ship: 2150 lb (975 kg)
Arc control (DIG) allows the arc
characteristics to be changed for
specific applications and electrodes.
Smooth running 7018 or stiffer,
more penetrating 6010 electrodes. 0
50
100
150
200
250
300
0
5
10
15
20
25
30
10
15
20
30
25
40
50
60
80
100
AC AMPERES IN 240V MODE
AC VOLTS
0
25
50
75
100
150
125
WELD AMPERES
100% DUTY CYCLE
100
150
400
300
250
200
500
600
1000
800
0
10
20
30
40
50
60
AC AMPERES IN 120V MODE
0 50 100 150 200 250 300 350 400 450 500 550 600
DC WELD AMPERES AT 40% DUTY CYCLE
CV
CC
0
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
0.40
0.21
0.62
0.83
1.25
1.04
1.46
1.70
1.98
0.95
2.84
3.78
5.67
4.73
6.62
7.57
U.S. GAL./HR.
IMP. GAL./HR.
LITERS/HR.
SINGLE
DUAL
Welding
Mode
Single
Dual
Weld Output Rated
at 104 F (40 C)
550 A at 30 VDC,
40% Duty Cycle
275 A at 31 VDC,
40% Duty Cycle
Weld
Output
Range
30 600 A
15 300 A
10 32 V
Weld
Stations
Available
1
(Right side)
1 or 2
(Both sides)
Weld
Output
CC/DC
CC/DC
CV/DC
Max. Open-
Circuit
Voltage
85
85
49
*Additional 176 lb (80 kg) when fuel tank is full.
Engine Brand
Deutz, F3L-914
Features
Tier IV: EPA-certified, direct-injected, air-
cooled engine. Right-side service access with
service intervals of 500 hours for oil and
filters.
Type
Three-cylinder,
industrial, air-
cooled, diesel
Weld
Speed
1800 RPM
Idle: N/A
HP
49.3
Fuel
Capacity
25 gal
(95 L)
Oil
Capacity
9 qt
(8.5 L)
Automatic Engine
Shutdown
High oil
temperature
Low oil pressure
Coolant
Capacity
Air
Engine
(Subject to change without notice.)
1
2
3
4
5
6
7
8
9
10
11
12
8
7
6
3
4
5
2
1
Front Panel
Side Panels
2
Control Panel
Performance Data
Weight
Without Fuel*
Net: 2005 lb
(909 kg)
Ship: 2032 lb
(922 kg)
Dimensions
H: 47-5/8 in
(1210 mm)
W: 31-1/4 in
(794 mm)
D: 60-1/2 in
(1537 mm)
Generator Output Rated
at 104 F (40 C)
Peak: 5500 watts
Continuous: 4000 watts,
34/17 A, 120/240 VAC,
while welding
Sound Levels at
Rated Output,
7 m (23 ft)
83 dB (108 Lwa)
Specifications
(Subject to change without notice.)
1. 120 VAC, 20 A GFCI Duplex Receptacle and Circuit Breakers
2. 240 VAC, 20 A Duplex Receptacle and Circuit Breakers
3. Battery Charging Warning Light
4. Engine Hour Meter
5. Engine Start Button
6. Manual Stop Control
7. Ether Starting Aid Switch (Optional)
8. Separate/Parallel Switch
1. Process Selector Switch
2. Arc Force (DIG) Control
3. Hot Start Switch
4. Ammeter
5. Voltmeter
6. Amperage/Voltage Control
7. High Temperature
Shutdown Light
8. Remote Amperage/Voltage
Control Switch
9. Output (Contactor) Switch
10. Negative Weld Output Terminal
11. CC Weld Output Terminal
12. CV Weld Output Terminal
FUEL CONSUMPTION
AUXILIARY POWER
DUTY CYCLE 3
Genuine Miller Options and Accessories
Stick (SMAW) Welding
No. 2/0 Stick Welding Accessory Kits
#173 851
50 ft (15 m) No. 2/0 electrode cable with
electrode holder and 50 ft (15 m) No. 2/0
work cable with work clamp. 350 A at
100% duty cycle.
#043 952
100 ft (30.5 m) No. 2/0 electrode cable with
electrode holder and 50 ft (15 m) No. 2/0
work cable with work clamp. 300 A at
100% duty cycle.
Wire Feeders
SuitCase X-TREME

8VS Wire Feeder
#300 093
SuitCase X-TREME

12VS Wire Feeder
#195 500
Lightweight, portable, voltage-sensing wire
feeder for .045/.052 flux core and .035/.045
hard wire. Includes secondary contactor and
gas valve. Requires gun and drive roll kit.
See Lit. Index M/6.41.
MIG (GMAW) Guns
Miller produces a complete line of
dependable MIG guns. Check literature
for complete details. See Lit. Index Nos.
M/10.0 and M/13.4.
Remote Controls
RHC-14 Hand Control #129 340
Miniature hand control for remote current
and contactor control. Dimensions: 4 x 4 x
3-1/4 in (102 x 102 x 82 mm). Includes
20 ft (6 m) cord and 14-pin plug.
Extension Cords for 14-Pin Remote Controls
#122 973 25 ft (7.6 m)
#122 974 50 ft (15.2 m)
#122 975 75 ft (22.9 m)
HWY-224 Trailer #043 805
A 2650 lb (1202 kg) capacity highway
trailer. Welded steel tubing frame, heavy-
duty axle with roller bearing hubs and
leaf-spring suspension. The HWY-224
comes with jack stand, 2 in (50 mm)
ball hitch, fenders and lights.
Note: Trailer is shipped unassembled.
OFR-224 Trailer #043 802
A 2650 lb (1202 kg) capacity off road
trailer. Welded steel tubing frame, heavy-
duty axle with roller bearing hubs and leaf
spring suspension. The OFR-224 comes
with jack stand and 2 in (50 mm) ball hitch.
Note: Trailer is shipped unassembled.
Lunette Eye 2-1/2 in (64 mm) #043 824
For use with both 224 trailers.
Cable Tree #043 826
Provides an area to conveniently wrap weld
cables and extension cords. Works on all
224 and 430 trailers.
HWY-430 Tandem Axle Trailer #043 806
Smooth riding with 3750 lb (1701 kg)
capacity. Includes: adjustable hitch for
level operation, a hand operated parking
brake, a self-actuating hydraulic brake
system and a break-away device to lock
brakes if the trailer comes loose. It also
includes jack stand, fenders and lights.
(Hitch must be ordered separately.)
Note: Some assembly required.
Ball Hitch 2 in (50 mm) #043 864
For use with the 430 trailer.
Lunette Eye 3 in (76 mm) #043 863
For use with the 430 trailer.
4 West Four-Wheel Steerable Off-Road
Trailer
#042 801
A heavy-duty 2570 lb (1166 kg) capacity
trailer designed for use in mines, quarries,
and other rough terrain. Has narrow 22 ft
(6.7 m) turning radius. Includes 3 in lunette
eye, universal hitch and safety chains.
Note: Trailer is shipped unassembled.
See page 4 for specifications on each trailer.
Trailers and Hitches Litho in USA
Distributed by:
Equipment and Factory Options
Stock No.
Description
Qty.
Price
Miller Du-Op Base Model
#907 317
International Model
#907 317-01-1
Dry Battery
#907 317-02-1
Dry Battery, Polarity Switches
Wire Feeders
Suitcase X-TREME 8VS Wire Feeder
#300 093
Includes contactor and gas valve. See Lit. Index No. M/6.41
Suitcase X-TREME 12VS Wire Feeder
#195 500
Includes contactor and gas valve. See Lit. Index No. M/6.41
MIG Guns and Consumables
See Lit. Index No. M/10.0 and M/13.4
Stick Accessories
Welding Leads
#173 851
2/0, 350 A, 100% duty cycle, 50 ft (15 m) stinger, 50 ft (15 m) work clamp
#043 952
2/0, 300 A, 100% duty cycle, 100 ft (30.5 m) stinger, 50 ft (15 m) work clamp
Remote Controls
RHC-14 #129 340
Hand control
Extension Cords
#122 973
25 ft (7.6 m), 14-pin remote controls
#122 974
50 ft (15.2 m), 14-pin remote controls
#122 975
75 ft (22.9 m), 14-pin remote controls
Trailers and Hitches
HWY-224 Trailer
#043 805
Trailer with lights, fenders and 2 in ball hitch
OFR-224 Trailer
#043 802
Trailer with 2 in ball hitch
Lunette Eye, 2-1/2 in
#043 824
Replaces the 2 in ball hitch on the HWY-224 or OFR-224
Cable Tree
#043 826
Trailer mounted cable holder for HWY-224, OFR-224 or HWY-430
HWY-430 Trailer
#043 806
Hitch requi