Lincoln Electric RANGER 305D AU User manual

Operator’s Manual
RANGER®305D (AU)
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IM10053-D | Issue D ate
Apr-21 © Lincoln Global, Inc. All Rights
Reserved.
For use with machines having Code Numbers:
11692, 12193, 12682, 13167
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to talk to a Service epresentative
Hours of Operation:
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no later than the following business day.
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Save for future reference
Date Purchased
Code: (ex: 10859)
Serial: (ex: U1060512345)

THANK YOU FOR SELECTING
A QUALITY PRODUCT BY
LINCOLN ELECTRIC.
PLEASE EXAMINE CARTON AND EQUIPMENT FOR
DAMAGE IMMEDIATELY
When this equipment is shipped, title passes to the purchaser
upon receipt by the carrier. Consequently, claims for material
damaged in shipment must be made by the purchaser against the
transportation company at the time the shipment is received.
SAFETY DEPENDS ON YOU
Lincoln arc welding and cutting equipment is designed and built
with safety in mind. However, your overall safety can be increased
by proper installation ... and thoughtful operation on your part.
DO NOT INSTALL, OPERATE OR REPAIR THIS EQUIPMENT
WITHOUT READING THIS MANUAL AND THE SAFETY
PRECAUTIONS CONTAINED THROUGHOUT. And, most importantly,
think before you act and be careful.
This statement appears where the information must be followed
exactly to avoid serious personal injury or loss of life.
This statement appears where the information must be followed
to avoid minor personal injury or damage to this equipment.
KEEP YOUR HEAD OUT OF THE FUMES.
DON’T get too close to the arc.
Use corrective lenses if necessary
to stay a reasonable distance
away from the arc.
READ and obey the Safety Data
Sheet (SDS) and the warning label
that appears on all containers of
welding materials.
USE ENOUGH VENTILATION or
exhaust at the arc, or both, to
keep the fumes and gases from
your breathing zone and the general area.
IN A LARGE ROOM OR OUTDOORS, natural ventilation may be
adequate if you keep your head out of the fumes (See below).
USE NATURAL DRAFTS or fans to keep the fumes away
from your face.
If you develop unusual symptoms, see your supervisor.
Perhaps the welding atmosphere and ventilation system
should be checked.
WEAR CORRECT EYE, EAR &
BODY PROTECTION
PROTECT your eyes and face with welding helmet
properly fitted and with proper grade of filter plate
(See ANSI Z49.1).
PROTECT your body from welding spatter and arc
flash with protective clothing including woolen
clothing, flame-proof apron and gloves, leather
leggings, and high boots.
PROTECT others from splatter, flash, and glare
with protective screens or barriers.
IN SOME AREAS, protection from noise may be appropriate.
BE SURE protective equipment is in good condition.
Also, wear safety glasses in work area
AT ALL TIMES.
SPECIAL SITUATIONS
DO NOT WELD OR CUT containers or materials which previously
had been in contact with hazardous substances unless they are
properly cleaned. This is extremely dangerous.
DO NOT WELD OR CUT painted or plated parts unless special
precautions with ventilation have been taken. They can release
highly toxic fumes or gases.
Additional precautionary measures
PROTECT compressed gas cylinders from excessive heat,
mechanical shocks, and arcs; fasten cylinders so they cannot fall.
BE SURE cylinders are never grounded or part of an
electrical circuit.
REMOVE all potential fire hazards from welding area.
ALWAYS HAVE FIRE FIGHTING EQUIPMENT READY FOR
IMMEDIATE USE AND KNOW HOW TO USE IT.
WARNING
CAUTION
Safety 01 of 04 - 5/16/2018

SECTION A:
WARNINGS
CALIFORNIA PROPOSITION 65 WARNINGS
WARNING: Breathing diesel engine exhaust
exposes you to chemicals known to the State
of California to cause cancer and birth defects,
or other reproductive harm.
• Always start and operate the engine in a
well-ventilated area.
• If in an exposed area, vent the exhaust to the outside.
• Do not modify or tamper with the exhaust system.
• Do not idle the engine except as necessary.
For more information go to
www.P65 warnings.ca.gov/diesel
WARNING: This product, when used for welding or
cutting, produces fumes or gases which contain
chemicals known to the State of California to cause
birth defects and, in some cases, cancer. (California
Health & Safety Code § 25249.5 et seq.)
WARNING: Cancer and Reproductive Harm
www.P65warnings.ca.gov
ARC WELDING CAN BE HAZARDOUS. PROTECT
YOURSELF AND OTHERS FROM POSSIBLE SERIOUS
INJURY OR DEATH. KEEP CHILDREN AWAY.
PACEMAKER WEARERS SHOULD CONSULT WITH
THEIR DOCTOR BEFORE OPERATING.
Read and understand the following safety highlights. For
additional safety information, it is strongly recommended
that you purchase a copy of “Safety in Welding & Cutting -
ANSI Standard Z49.1” from the American Welding Society,
P.O. Box 351040, Miami, Florida 33135 or CSA Standard
W117.2-1974. A Free copy of “Arc Welding Safety” booklet
E205 is available from the Lincoln Electric Company,
22801 St. Clair Avenue, Cleveland, Ohio 44117-1199.
BE SURE THAT ALL INSTALLATION, OPERATION,
MAINTENANCE AND REPAIR PROCEDURES ARE
PERFORMED ONLY BY QUALIFIED INDIVIDUALS.
FOR ENGINE POWERED
EQUIPMENT.
1.a. Turn the engine off before troubleshooting
and maintenance work unless the
maintenance work requires it to be running.
1.b. Operate engines in open, well-ventilated areas or vent the engine
exhaust fumes outdoors.
1.c. Do not add the fuel near an open flame welding
arc or when the engine is running. Stop the
engine and allow it to cool before refueling to
prevent spilled fuel from vaporizing on contact
with hot engine parts and igniting. Do not spill fuel when filling
tank. If fuel is spilled, wipe it up and do not start engine until
fumes have been eliminated.
1.d. Keep all equipment safety guards, covers
and devices in position and in good repair.
Keep hands, hair, clothing and tools away
from V-belts, gears, fans and all other
moving parts when starting, operating or
repairing equipment.
1.e. In some cases it may be necessary to remove safety guards to
perform required maintenance. Remove guards only when
necessary and replace them when the maintenance requiring
their removal is complete. Always use the greatest care when
working near moving parts.
1.f. Do not put your hands near the engine fan. Do not attempt to
override the governor or idler by pushing on the throttle control
rods while the engine is running.
1.g. To prevent accidentally starting gasoline engines while turning
the engine or welding generator during maintenance work,
disconnect the spark plug wires, distributor cap or magneto wire
as appropriate.
1.h. To avoid scalding, do not remove the radiator
pressure cap when the engine is hot.
ELECTRIC AND
MAGNETIC FIELDS MAY
BE DANGEROUS
2.a. Electric current flowing through any conductor
causes localized Electric and Magnetic Fields (EMF).
Welding current creates EMF fields around welding cables
and welding machines
2.b. EMF fields may interfere with some pacemakers, and
welders having a pacemaker should consult their physician
before welding.
2.c. Exposure to EMF fields in welding may have other health effects
which are now not known.
2.d. All welders should use the following procedures in order to
minimize exposure to EMF fields from the welding circuit:
2.d.1. Route the electrode and work cables together - Secure
them with tape when possible.
2.d.2. Never coil the electrode lead around your body.
2.d.3. Do not place your body between the electrode and work
cables. If the electrode cable is on your right side, the
work cable should also be on your right side.
2.d.4. Connect the work cable to the workpiece as close as pos-
sible to the area being welded.
2.d.5. Do not work next to welding power source.
SAFETY
Safety 02 of 04 - 5/16/2018

ELECTRIC SHOCK
CAN KILL.
3.a. The electrode and work (or ground) circuits are
electrically “hot” when the welder is on. Do
not touch these “hot” parts with your bare skin or wet clothing.
Wear dry, hole-free gloves to insulate hands.
3.b. Insulate yourself from work and ground using dry insulation.
Make certain the insulation is large enough to cover your full area
of physical contact with work and ground.
In addition to the normal safety precautions, if
welding must be performed under electrically
hazardous conditions (in damp locations or while
wearing wet clothing; on metal structures such as
floors, gratings or scaffolds; when in cramped
positions such as sitting, kneeling or lying, if there
is a high risk of unavoidable or accidental contact
with the workpiece or ground) use the following
equipment:
• Semiautomatic DC Constant Voltage (Wire) Welder.
• DC Manual (Stick) Welder.
• AC Welder with Reduced Voltage Control.
3.c. In semiautomatic or automatic wire welding, the electrode,
electrode reel, welding head, nozzle or semiautomatic welding
gun are also electrically “hot”.
3.d. Always be sure the work cable makes a good electrical
connection with the metal being welded. The connection should
be as close as possible to the area being welded.
3.e. Ground the work or metal to be welded to a good electrical (earth)
ground.
3.f. Maintain the electrode holder, work clamp, welding cable and
welding machine in good, safe operating condition. Replace
damaged insulation.
3.g. Never dip the electrode in water for cooling.
3.h. Never simultaneously touch electrically “hot” parts of electrode
holders connected to two welders because voltage
between the
two can be the total of the open circuit voltage of both
welders.
3.i. When working above floor level, use a safety belt to protect
yourself from a fall should you get a shock.
3.j. Also see Items 6.c. and 8.
ARC RAYS CAN BURN.
4.a. Use a shield with the proper filter and cover plates to protect your
eyes from sparks and the rays of the arc when welding or
observing open arc welding. Headshield and filter lens should
conform to ANSI Z87. I standards.
4.b. Use suitable clothing made from durable flame-resistant material
to protect your skin and that of your helpers from the arc rays.
4.c. Protect other nearby personnel with suitable, non-flammable
screening and/or warn them not to watch the arc nor expose
themselves to the arc rays or to hot spatter or metal.
FUMES AND GASES
CAN BE DANGEROUS.
5.a. Welding may produce fumes and gases
hazardous to health. Avoid breathing these
fumes and gases. When welding, keep your head out of the fume.
Use enough ventilation and/or exhaust at the arc to keep fumes
and gases away from the breathing zone. When welding
hardfacing (see instructions on container or SDS)
or on lead or cadmium plated steel and other
metals or coatings which produce highly toxic
fumes, keep exposure as low as possible and
within applicable OSHA PEL and ACGIH TLV limits
using local exhaust or mechanical ventilation
unless exposure assessments indicate otherwise.
In confined spaces or in some circumstances,
outdoors, a respirator may also be required.
Additional precautions are also required when
welding
on galvanized steel.
5. b. The operation of welding fume control equipment is affected by
various factors including proper use and positioning of the
equipment, maintenance of the equipment and the specific
welding procedure and application involved. Worker exposure
level should be checked upon installation and periodically
thereafter to be certain it is within applicable OSHA PEL and
ACGIH TLV limits.
5.c. Do not weld in locations near chlorinated hydrocarbon vapors
coming from degreasing, cleaning or spraying operations. The
heat and rays of the arc can react with solvent vapors to form
phosgene, a highly toxic gas, and other irritating products.
5.d. Shielding gases used for arc welding can displace air and
cause
injury or death. Always use enough ventilation, especially in
confined areas, to insure breathing air is safe.
5.e. Read and understand the manufacturer’s instructions for this
equipment and the consumables to be used, including the
Safety Data Sheet (SDS) and follow your employer’s safety
practices. SDS forms are available from your welding
distributor or from the manufacturer.
5.f. Also see item 1.b.
SAFETY
Safety 03 of 04 - 5/16/2018

WELDING AND CUTTING
SPARKS CAN CAUSE
FIRE OR EXPLOSION.
6.a. Remove fire hazards from the welding area. If
this is not possible, cover them to prevent the welding sparks
from starting a fire. Remember that welding sparks and hot
materials from welding can easily go through small cracks and
openings to adjacent areas. Avoid welding near hydraulic lines.
Have a fire extinguisher readily available.
6.b. Where compressed gases are to be used at the job site, special
precautions should be used to prevent hazardous situations.
Refer to “Safety in Welding and Cutting” (ANSI Standard Z49.1)
and the operating information for the equipment being used.
6.c. When not welding, make certain no part of the electrode circuit is
touching the work or ground. Accidental contact can cause
overheating and create a fire hazard.
6.d. Do not heat, cut or weld tanks, drums or containers until the
proper steps have been taken to insure that such procedures
will not cause flammable or toxic vapors from substances inside.
They can cause an explosion even though they have been
“cleaned”. For information, purchase “Recommended Safe
Practices for the Preparation for Welding and Cutting of
Containers and Piping That Have Held Hazardous Substances”,
AWS F4.1 from the American Welding Society
(see address above).
6.e. Vent hollow castings or containers before heating, cutting or
welding. They may explode.
6.f. Sparks and spatter are thrown from the welding arc. Wear oil free
protective garments such as leather gloves, heavy shirt, cuffless
trousers, high shoes and a cap over your hair. Wear ear plugs
when welding out of position or in confined places. Always wear
safety glasses with side shields when in a welding area.
6.g. Connect the work cable to the work as close to the welding area
as practical. Work cables connected to the building framework or
other locations away from the welding area increase the
possibility of the welding current passing through lifting chains,
crane cables or other alternate circuits. This can create fire
hazards or overheat lifting chains or cables until they fail.
6.h. Also see item 1.c.
6.I. Read and follow NFPA 51B “Standard for Fire Prevention During
Welding, Cutting and Other Hot Work”, available from NFPA, 1
Batterymarch Park, PO box 9101, Quincy, MA 022690-9101.
6.j. Do not use a welding power source for pipe thawing.
CYLINDER MAY EXPLODE IF
DAMAGED.
7.a. Use only compressed gas cylinders containing
the correct shielding gas for the process used
and properly operating regulators designed for
the gas and pressure used. All hoses, fittings,
etc. should be suitable for the application and
maintained in good condition.
7.b. Always keep cylinders in an upright position securely chained to
an undercarriage or fixed support.
7.c. Cylinders should be located:
• Away from areas where they may be struck or subjected
to physical damage.
• A safe distance from arc welding or cutting operations
and any other source of heat, sparks, or flame.
7.d. Never allow the electrode, electrode holder or any other
electrically “hot” parts to touch a cylinder.
7.e. Keep your head and face away from the cylinder valve outlet
when opening the cylinder valve.
7.f. Valve protection caps should always be in place and hand tight
except when the cylinder is in use or connected for use.
7.g. Read and follow the instructions on compressed gas cylinders,
associated equipment, and CGA publication P-l, “Precautions for
Safe Handling of Compressed Gases in Cylinders,” available from
the Compressed Gas Association, 14501 George Carter Way
Chantilly, VA 20151.
FOR ELECTRICALLY
POWERED EQUIPMENT.
8.a. Turn off input power using the disconnect
switch at the fuse box before working on
the equipment.
8.b. Install equipment in accordance with the U.S. National Electrical
Code, all local codes and the manufacturer’s recommendations.
8.c. Ground the equipment in accordance with the U.S. National
Electrical Code and the manufacturer’s recommendations.
Refer to
http://www.lincolnelectric.com/safety
for additional safety information.
SAFETY
Safety 04 of 04 - 5/16/2018

vi
vi TABLE OF CONTENTS
Page
nstallation.......................................................................................................................Section A
Technical Specifications.......................................................................................................A-1
Safety Precautions........................................................................................................ A-2
Location and Ventilation................................................................................................A-2
Stacking........................................................................................................................ A-2
Angle of Operation........................................................................................................ A-2
Lifting.............................................................................................................................A-2
High Altitude Operation................................................................................................. A-2
High Temperature Operation........................................................................................ A-2
Cold Weather Operation............................................................................................... A-2
Towing...........................................................................................................................A-3
Vehicle Mounting...........................................................................................................A-3
Pre-Operation Engine Service..............................................................................................A-3
Oil..................................................................................................................................A-3
Fuel............................................................................................................................... A-3
Engine Coolant..............................................................................................................A-4
Battery Connections......................................................................................................A-4
Muffler Outlet Pipe........................................................................................................ A-4
Spark Arrester............................................................................................................... A-4
Remote Control............................................................................................................. A-4
Electrical Connections..........................................................................................................A-4
Machine Grounding.......................................................................................................A-4
Welding Terminals........................................................................................................ A-5
Welding Output Cables................................................................................................. A-5
Cable Installation...........................................................................................................A-5
Electrical evice Used with the Ranger 305 (AU)............................................................. A-6
Auxiliary Power Receptacles and Plugs...............................................................................A-7
Standby Power Connections................................................................................................ A-7
Premises Wiring................................................................................................................... A-8
Connection of Lincoln Electric Wire Feeders...............................................................A-9,A-10
________________________________________________________________________________
Operation.........................................................................................................................Section B
Safety Precautions .............................................................................................................. B-1
General escription..............................................................................................................B-1
For Auxiliary Power.............................................................................................................. B-1
Engine Operation..................................................................................................................B-1
Add Fuel............................................................................................................................... B-1
Break in Period.....................................................................................................................B-1
Welder Controls............................................................................................................. B-2,B-3
Engine Controls....................................................................................................................B-3
Starting and Stopping the Engine................................................................................. B-4
Welding Operation................................................................................................................B-4
uty Cycle.............................................................................................................. B-4,B-5
Constant Current (Stick) Welding..................................................................................B-5
ownhill Pipe (Stick) Welding....................................................................................... B-5
Tig Welding................................................................................................................... B-5
Typical Current Ranges for Tungsten Electrodes......................................................... B-5
Wire Welding-CV...........................................................................................................B-6
Arc Gouging.................................................................................................................. B-6
Auxiliary Power Operation.............................................................................................B-7
Simultaneous Welding and Auxiliary Power Loads.......................................................B-7
Extension Cord Recommendations...............................................................................B-7
________________________________________________________________________________
Accessories.....................................................................................................Section C
Field Installed Options / Accessories ...............................................................................C-1
________________________________________________________________________________

vii vii
TABLE OF CONTENTS
Maintenance......................................................................................................Section D
Safety Precautions................................................................................................ -1
Routine Maintenance............................................................................................ -1
Engine Maintenance Components........................................................................ -1
Kubota iesel Engine............................................................................................ -1
Engine Oil Change.......................................................................................... -2
Engine Oil Refill Capacities............................................................................. -2
Engine Oil Filter Change................................................................................. -2
Air Cleaner Service......................................................................................... -2
Service Instructions And Installation Tips for Engine Air Filter....................... -3
Cooling System..................................................................................................... -4
Fan Belt........................................................................................................... -4
Fuel................................................................................................................. -4
Bleeding the Fuel System............................................................................... -4
Fuel Filter........................................................................................................ -5
Engine Adjustment.......................................................................................... -5
Battery Maintenance....................................................................................... -5
Servicing Optional Spark Arrestor................................................................... -5
Welder / Generator Maintenance........................................................................ -6
Storage........................................................................................................... -6
Cleaning.......................................................................................................... -6
Brush Removal and Replacement.................................................................. -6
GFCI Testing and Resetting Procedure.......................................................... -6
________________________________________________________________________
Troubleshooting.............................................................................................. Section E
How to Use Troubleshooting Guide.......................................................................E-1
Troubleshooting Guide............................................................................ E-2 thru E-6
________________________________________________________________________
Diagrams and Dimension Print...................................................................... Section F
________________________________________________________________________
Parts List.................................................................................................................P-646
________________________________________________________________________

RANGER® 305D (AU)
1. Output rating in watts is equivalent to volt-amperes at unity power factor. Output voltage is within ± 10% at all loads up to
rated capacity. When welding, available auxiliary power will be reduced.
* Top of enclosure add 6in. (152mm) for exhaust pipe.
** Engine warranty may vary outside of the USA. (See Engine warranty for details)
A-1
NSTALLAT ON
A-1
TECHN CAL SPEC F CAT ONS - Ranger® 305D (AU) (K2922-1)
Make/Model Description Speed (RPM) Displacement Starting Capacities
cu. in. (cu. cm.) System
3 cylinder 43.88(789)
12V C Battery & Fuel: 12 gal.
4 stroke starter (45 Liters)
18.8 HP High Idle 3650 Bore x Stroke inch (mm) Oil: 3.4Qts. (3.2L)
Kubota** (14 KW)
722 Net intermittent Full Load 3500
2.64 x 2.68 (Group 58; 550 Radiator Coolant:
3600 RPM (67 x 68 mm) cold crank amps) 3.85Qts. (3.6L)
naturally aspirated Low Idle 2450 Battery Charger
water cooled (3.6L)
NPUT - D ESEL ENG NE
RATED OUTPUT @ 104° F (40° C) - WELDER
HE GHT W DTH DEPTH WE GHT
30.00* in. 21.50 in 52.25 in.
762.0 mm 546.0 mm 1327.0 mm
LUBR CAT ON EM SS ONS FUEL SYSTEM GOVERNOR
Full Pressure Certified to EPA Tier 4 Mechanical Fuel Pump, Auto air bleed Mechanical
with Full Flow Filter Compliant system Electric shutoff solenoid Indirect fuel injector Governor
A R CLEANER ENG NE DLER MUFFLER ENG NE PROTECT ON
Low noise Muffler: Shutdown on low oil
Single Element Automatic Idler Top outlet can be rotated. pressure & engine
Made from long life, aluminized steel. temperature
ENG NE WARRANTY: 2 year complete (parts and labor) 3rd. year major components (parts and labor)
Welding Process
C Constant Current
C Pipe Current
Touch-Start™TIG
C Constant Voltage
Output Range
20 TO 305 AMPS
40 TO 300 AMPS
20 TO 250 AMPS
14 TO 29 VOLTS
Max. Weld OCV
@Rated Load RPM
60 Volts
Welding Output
Current/Voltage/Duty Cycle
305A / 29V / 100%
300A / 29V / 100%
250A / 30V / 100%
300A / 29V / 100%
Auxiliary Power 1
7200 Watts Continuous, 60 Hz 240 Volts
Sound Levels
Sound Power: 104.2 dB Lwa, Sound Level: 80.6 dBA @ 23 ft ( 7m )
PHYS CAL D MENS ONS
ENG NE
RECEPTACLES AUX L ARY POWER C RCU T BREAKER OTHER C RCU T BREAKERS
(2) 240VAC Receptacles Two 15AMP for Two Receptacles 15AMP for Battery Charging Circuit
15AMP for 42V Wire Feeder Power
RECEPTACLES AND C RCU T BREAKERS
RATED OUTPUT @ 104° F (40° C).- GENERATOR
698 lbs. (317kg.)

gallons (45ltrs.).
L FT NG
The Ranger® 305 (AU) weighs approximately
775lbs.(352kg.) with a full tank of fuel (698 lbs. less
fuel). A lift bail is mounted to the machine and should
always be used when lifting the machine.
H GH ALT TUDE OPERAT ON
At higher altitudes, output derating may be necessary. For max-
imum rating, derate the machine 2.5% to 3.5% for every 1000 ft.
(305m). ue to new EPA and other local emissions regulations,
modifications to the engine for high altitude are restricted within
the United States and some other European Countries. Use
above 6000 ft.(1828 m) may be limited due to poor engine per-
formance or excessive exhaust smoke. An authorized Kubota
engine field service shop should be contacted to determine if
any adjustments can be made for operation in higher elevations
locally.
H GH TEMPERATURE OPERAT ON
At temperatures above 104°F(40°C), Welder output derating is
necessary. For maximum output ratings, derate the welder out-
put 2 volts for every 50°F(10°C) above 104°F(40°C).
Cold weather starting:
With a fully charged battery and the proper weight oil,
the engine should start satisfactorily even down to
about 5°F (-15°C). If the engine must be frequently
started at or below 23°F (-5°C), it may be desirable to
install cold-starting aides. The use of No. 1 diesel
fuel is recommended in place of No. 2 at tempera-
tures below 23°F (-5°C). Allow the engine to warm up
before applying a load or switching to high idle.
Note: Extreme cold weather starting may require
longer glow plug operation.
Under no conditions should ether or other starting
fluids be used with this engine!
WARN NG
A-2
NSTALLAT ON
RANGER® 305D (AU)
A-2
SAFETY PRECAUT ONS
Only qualified personnel should install,
use, or service this equipment.
LOCAT ON AND VENT LAT ON
The welder should be located to provide an unrestrict-
ed flow of clean, cool air to the cooling air inlets and to
avoid restricting the cooling air outlets. Also, locate the
welder so that the engine exhaust fumes are properly
vented to an outside area.
STACK NG
Ranger® 305 (AU) machines cannot be stacked.
ANGLE OF OPERAT ON
Engines are designed to run in the level condition
which is where the optimum performance is achieved.
The maximum angle of continuous operation is 20
degrees in all directions, 35 degrees Intermittent (less
than 10 minutes continuous) in all directions. If the
engine is to be operated at an angle, provisions must
be made for checking and maintaining the oil level at
the normal (FULL) oil capacity in the crankcase.
When operating the welder at an angle, the effective
fuel capacity will be slightly less than the specified 12
Do not attempt to use this equipment until you
have thoroughly read the engine manufacturer’s
manual supplied with your welder. t includes
important safety precautions, detailed engine
starting, operating and maintenance instructions,
and parts lists.
------------------------------------------------------------------------
ELECTR C SHOCK can kill.
• Do not touch electrically live parts or
electrode with skin or wet clothing.
• nsulate yourself from work and
ground
• Always wear dry insulating gloves.
------------------------------------------------------------------------
ENG NE EXHAUST can kill.
• Use in open, well ventilated areas or
vent exhaust outside.
------------------------------------------------------------------------
MOV NG PARTS can injure.
• Do not operate with doors open or
guards off.
• Stop engine before servicing.
• Keep away from moving parts.
------------------------------------------------------------------------
See additional warning information at
front of this operator’s manual.
WARN NG
• Lift only with equipment of ade-
quate lifting capacity.
• Be sure machine is stable when lift-
ing.
• Do not lift this machine using lift
bail if it is equipped with a heavy
accessory such as trailer or gas
cylinder.
FALL NG • Do not lift machine if lift bail is
EQU PMENT can damaged.
cause injury. • Do not operate machine while
suspended from lift bail.
WARN NG

PRE-OPERAT ON ENG NE SERV CE
REA the engine operating and maintenance instruc-
tions supplied with this machine.
• Stop engine and allow to cool before fueling
• Do not smoke when fueling.
• Fill fuel tank at a moderate rate and do not over-
fill.
• Wipe up spilled fuel and allow fumes to clear
before starting engine.
• Keep sparks and flame away from tank.
------------------------------------------------------------------------
O L
The Ranger® 305 (AU) is shipped with the engine
crankcase filled with high quality SAE 10W-30 Oil that
meets classification CG-4 or CH-4 for diesel engines.
Check the oil level before starting the engine. If it is
not up to the full mark on the dip stick, add oil as
required. Check the oil level every four hours of run-
ning time during the first 50 running hours. Refer to
the engine Operator’s Manual for specific oil recom-
mendations and break-in information. The oil change
interval is dependent on the quality of the oil and the
operating environment. Refer to the Engine Operator’s
Manual for more details on the proper service and
maintenance intervals.
FUEL
D ESEL FUEL ONLY-Low sulphur fuel or ultra low
sulphur fuel in U.S.A. and Canada.
• Fill the fuel tank with clean, fresh fuel. The
capacity of the tank is 12 gals. (45.4ltrs). When
the fuel gauge reads empty the tank contains
approximately 2 gals. (7.6ltrs.) of reserve fuel.
NOTE: A fuel shut off valve is located on the pre-
filter/sediment filter. Which should be in
the closed position when the welder is not
ran for extended periods of time.
--------------------------------------------------------------------------------
A-3
NSTALLAT ON
RANGER® 305D (AU)
A-3
--------------------------------------------------------------------------------
TOW NG
The recommended trailer for use with this equipment for road,
in-plant and yard towing by a vehicle(1) is Lincoln’s K957-1. If
the user adapts a non-Lincoln trailer, he must assume responsi-
bility that the method of attachment and usage does not result
in a safety hazard nor damage the welding equipment. Some of
the factors to be considered are as follows:
1. esign capacity of trailer vs. weight of Lincoln equipment and
likely additional attachments.
2. Proper support of, and attachment to, the base of the weld-
ing equipment so there will be no undue stress to the frame-
work.
3. Proper placement of the equipment on the trailer to insure
stability side to side and front to back when being moved
and when standing by itself while being operated or ser-
viced.
4. Typical conditions of use, i.e., travel speed; roughness of sur-
face on which the trailer will be operated; environmental con-
ditions; like maintenance.
5. Conformance with federal, state and local laws.(1)
WARN NG
WARN NG
WARN NG
VEH CLE MOUNT NG
mproperly mounted concentrated loads may
cause unstable vehicle handling and tires or other
components to fail.
• Only transport this Equipment on serviceable
vehicles which are rated and designed for such
loads.
• Distribute, balance and secure loads so vehicle
is stable under conditions of use.
• Do not exceed maximum rated loads for compo-
nents such as suspension, axles and tires.
• Mount equipment base to metal bed or frame of
vehicle.
• Follow vehicle manufacturer’s instructions.
--------------------------------------------------------------------------------
WARN NG

A-4
NSTALLAT ON
RANGER® 305D (AU)
A-4
--------------------------------------------------------------------------------
REMOTE CONTROL
The Ranger® 305 (AU) is equipped with a 6-pin and
a 14-pin connector. The 6-pin connector is for con-
necting the K857 or K857-1 Remote Control or for TIG
welding, the K870 foot Amptrol or the K936-3 hand
Amptrol. When in the CC-STICK, OWNHILL PIPE,
or CV-WIRE modes and when a remote control is
connected to the 6-pin Connector, the auto-sensing
circuit automatically switches the OUTPUT control
from control at the welder to remote control.
When in TOUCH START TIG mode and when a
Amptrol is connected to the 6-Pin Connector, the
OUTPUT dial is used to set the maximum current
range of the CURRENT CONTROL of the Amptrol.
The 14-pin connector is used to directly connect a
wire feeder control cable. In the CV-WIRE mode,
when the control cable is connected to the 14-pin con-
nector, the auto-sensing circuit automatically makes
the Output Control inactive and the wire feeder volt-
age control active
NOTE: When a wire feeder with a built in welding
voltage control is connected to the 14-pin connec-
tor, do not connect anything to the 6-pin connec-
tor.
--------------------------------------------------------------------------------
ELECTR CAL CONNECT ONS
MACH NE GROUND NG
Because this portable engine driven welder creates its
own power, it is not necessary to connect its frame to
an earth ground, unless the machine is connected to
premises wiring (home, shop, etc.)
To prevent dangerous electric shock, other equipment
to which this engine driven welder supplies power
must:
• Be grounded to the frame of the welder using a
grounded type plug.
• Be double insulated.
• Do not ground the machine to a pipe that carries
explosive or combustible material.
--------------------------------------------------------------------------------
WARN NG
(1) Consult applicable federal, state and local laws regarding specific
requirements for use on public highways.
ENG NE COOL NG SYSTEM
Air to cool the engine is drawn in the base sides
and exhaust through radiator & case back. t is
important that the intake and exhaust air is not
restricted. Allow a minimum clearance of 2 feet
(0.6m) from the case back and 16in.(406mm) from
either side of the base to a vertical surface.
--------------------------------------------------------------------------------
BATTERY CONNECT ON
Use caution as the electrolyte is a strong acid that
can burn skin and damage eyes.
--------------------------------------------------------------------------------
The Ranger® 305 (AU) is shipped with the negative
battery cable disconnected. Make certain that the
RUN-STOP switch is in the STOP position. Remove
the two screws from the rear battery tray using a
screwdriver or a 3/8" socket. Attach the negative bat-
tery cable to the negative battery terminal and tighten
using a 1/2" socket or wrench.
NOTE: This machine is furnished with a wet charged
battery; if unused for several months, the battery may
require a booster charge. Be careful to charge the bat-
tery with the correct polarity.
MUFFLER OUTLET P PE
Using the clamp provided secure the outlet pipe to the
outlet tube with the pipe positioned such that it will
direct the exhaust in the desired direction. Tighten
using a 9/16" socket or wrench.
SPARK ARRESTER
Some federal, state or local laws may require that
gasoline or diesel engines be equipped with exhaust
spark arresters when they are operated in certain
locations where unarrested sparks may present a fire
hazard. The standard muffler included with this welder
does not qualify as a spark arrester. When required by
local regulations, a suitable spark arrester, such as
the K1898-1 must be installed and properly main-
tained.
An incorrect spark arrestor may lead to damage to
the engine or adversely affect performance.
CAUT ON
WARN NG
WARN NG
WARN NG

TABLE A.1
CABLE NSTALLAT ON
Install the welding cables to your Ranger® 305 (AU)
as follows.
1. The engine must be OFF to install welding cables.
2. Remove the flanged nuts from the output terminals
.
3. Connect the electrode holder and work cables to the
weld output terminals. The terminals are identified
on the case front.
4. Tighten the flanged nuts securely.
5. Be certain that the metal piece you are welding (the
“work”) is properly connected to the work clamp and
cable.
6. Check and tighten the connections periodically.
• Loose connections will cause the output termi-
nals to overheat. The terminals may eventually
melt.
• Do not cross the welding cables at the output ter-
minal connection. Keep the cables isolated and
separate from one another.
--------------------------------------------------------------------------------
CAUT ON
A-5
NSTALLAT ON
RANGER® 305D (AU)
A-5
When this welder is mounted on a truck or trailer, its
frame must be electrically bonded to the metal frame
of the vehicle. Use a #8 or larger copper wire connect-
ed between the machine grounding stud and the
frame of the vehicle. When this engine driven welder
is connected to premises wiring such as that in a
home or shop, its frame must be connected to the sys-
tem earth ground. See further connection instructions
in the section entitled "Standby Power Connections"
as well as the article on grounding in the latest
National Electrical Code and the local code.
In general, if the machine is to be grounded, it should
be connected with a #8 or larger copper wire to a solid
earth ground such as a metal water pipe going into the
ground for at least ten feet and having no insulated
joints, or to the metal framework of a building which
has been effectively grounded.
The National Electrical Code lists a number of alter-
nate means of grounding electrical equipment. A
machine grounding stud marked with the symbol
is provided on the front of the welder.
WELD NG TERM NALS
The Ranger® 305 (AU) is equipped with a toggle
switch for selecting "hot" welding terminal when in the
"WEL TERMINALS ON" position or "cold" welding
terminal when in the "REMOTELY CONTROLLE "
position.
WELD NG OUTPUT CABLES
With the engine off connect the electrode and work
cables to the output studs. The welding process dic-
tates the polarity of the electrode cable. These con-
nections should be checked periodically and tightened
with a 3/4" wrench.
Table A.1 lists recommended cable sizes and lengths
for rated current and duty cycle. Length refers to the
distance from the welder to the work and back to the
welder. Cable diameters are increased for long cable
lengths to reduce voltage drops.
TOTAL COMB NED LENGTH OF
ELECTRODE AND WORK CABLES
Cable Length
0-100Ft. (0-30 meters)
100-150 Ft. (30-46 meters)
150-200 Ft. (46-61 meters)
Cable Size for
305 Amps
100% Duty Cycle
1 / 0 AWG
2 / 0 AWG
3 / 0 AWG

A-6
NSTALLAT ON
RANGER® 305D (AU)
A-6
TABLE lll
ELECTRICAL DEVICE USE WITH THE RANGER® 305D (AU).
Type Common Electrical Devices Possible Concerns
Resistive Heaters, toasters, incandescent NONE
light bulbs, electric range, hot
pan, skillet, coffee maker.
Capacitive TV sets, radios, microwaves, Voltage spikes or high voltage
appliances with electrical control. regulation can cause the capaci-
tative elements to fail. Surge
protection, transient protection,
and additional loading is recom-
mended for 100% fail-safe oper-
ation. DO NOT RUN THESE
DEVICES WITHOUT ADDI-
TIONAL RESISTIVE TYPE
LOADS.
Inductive Single-phase induction motors, These devices require large
drills, well pumps, grinders, small current inrush for starting.
refrigerators, weed and hedge Some synchronous motors may
trimmers be frequency sensitive to attain
maximum output torque, but
they SHOUL BE SAFE from
any frequency induced failures.
Capacitive/Inductive Computers, high resolution TV sets, An inductive type line condition-
complicated electrical equipment. er along with transient and
surge protection is required, and
liabilities still exist. DO NOT
USE THESE DEVICES WITH A
RANGER® 305D (AU)
The Lincoln Electric Company is not responsible for any damage to electrical components improperly connected
to the RANGER® 305 (AU).

AUX L ARY POWER RECEPTACLES
The auxiliary power capacity of the Ranger® 305
(AU) is 7.2KW of 60Hz single phase power protected
by an RC (Residual Current evice) and 2 single
phase 15 amp circuit breakers. The auxiliary power
capacity in watts equivalent to volt-amperes at unity
power factor.
This model has:
1 Residual Current evice (RC ) protection (30mA).
2 x 1 phase 15 amp Circuit Breakers.
2 x 1 phase 240 volt 15 amp per outlet.
Note: The single-phase outlets are from different
phases and cannot be paralleled.
The auxiliary power receptacles should only be used
with three grounded type plugs or approved double
insulated tools. The current rating of any plug used
with the system must be at least equal to the current
capacity of the associated receptacle.
STANDBY POWER CONNECT ONS
The Ranger® 305 (AU) is suitable for temporary,
standby or emergency power using the engine manu-
facturer’s recommended maintenance schedule.
The Ranger® 305 (AU) can be permanently
installed as a standby power unit for 240 volt (60Hz).
Connections must be made by a licensed electrician
who can determine how the 240 VAC power can be
adapted to the particular installation and comply with
all applicable electrical codes. The following informa-
tion can be used as a guide by the electrician for
most applications.
1 Install an isolation switch between the power com-
pany meter and the premises disconnect. (The
Ranger® 305 (AU) and the power company sup-
plies must not be connected together).
Switch rating must be the same or greater than the
customer’s premises disconnect and service over
current protection.
2. Take necessary steps to assure load is limited to
the capacity of the Ranger® 305 (AU). Loading
above the rated output will reduce output voltage
below the allowable -10% of rated voltage which
may damage appliances or other motor-driven
equipment and may result in overheating of the
Ranger® 305 (AU) engine.
A-7
NSTALLAT ON
RANGER® 305D (AU)
A-7

CONNECTION OF ACROSS THE ARC WIRE FEEDERS
TO THE RANGER®305D (AU)
These connections instructions apply to both the LN-25 Pro and
Activ8 models. The feeders have an internal contactor and the
electrode is not energized until the gun trigger is closed. hen the
gun trigger is closed the wire will begin to feed and the welding
process is started.
• Shut the welder off.
• For electrode Positive, connect the electrode cable to the "+"
terminal of the welder and work cable to the "-" terminal of the
welder. For electrode Negative, connect the electrode cable "-"
terminal of the welder and work cable to the "+" terminal of the
welder.
• Attach the single lead from the front of the feeder to work using
the spring clip at the end of the lead. This is a control lead to
supply current to the wire feeder motor; it does not carry weld-
ing current (See Figure A.8).
• Set the MODE switch to the "CV- IRE" position (See Figure A.7).
• Set the " ELD TERMINALS" switch to " ELD TERMINALS ON"
• Set the "ARC CONTROL" knob to "0" initially and adjust to suit.
• Set the “REMOTE/LOCAL” switch to “LOCAL” control.
Set Mode to
CV Wire
Set to
Local
Weld
Terminals On
FIGURE A.7
FIGURE A.8
A-8
NSTALLAT ON
RANGER® 305D (AU)
A-8

B-1
OPERAT ON
RANGER® 305D (AU)
B-1
SAFETY PRECAUT ONS
Do not attempt to use this equipment until you
have thoroughly read the engine manufacturer’s
manual supplied with your welder. t includes
important safety precautions, detailed engine
starting, operating and maintenance instructions,
and parts lists.
--------------------------------------------------------------------------------
ELECTR C SHOCK can kill.
• Do not touch electrically live parts or
electrode with skin or wet clothing.
• nsulate yourself from work and
ground
• Always wear dry insulating gloves.
• Always operate the welder with the hinged door
closed and the side panels in place.
• Read carefully the Safety Precautions page
before operating this machine. Always follow
these and any other safety procedures included
in this manual and in the Engine nstruction
Manual.
GENERAL DESCR PT ON
The Ranger® 305 (AU) is a diesel engine powered
C multi-process welding power source and 240 volt
AC power generator. The engine drives a generator
that supplies three phase power for the C welding
circuit and single phase power for the AC auxiliary
outlets. The C welding control system uses state of
the art Chopper Technology (CT tm) for superior weld-
ing performance.
FOR AUX L ARY POWER:
Start the engine and set the I LER control switch to
the desired operating mode. Full power is available
regardless of the welding control settings providing no
welding current is being drawn.
The auxiliary power of the Ranger® 305 (AU) con-
sists of two 15 Amp-240 VAC receptacles. Also refer
to the AUXILIARY POWER OPERATION section later
in this chapter.
ENG NE OPERAT ON
Before Starting the Engine:
• Be sure the machine is on a level surface.
• Open top & side engine doors and remove the
engine oil dipstick and wipe it with a clean cloth.
Reinsert the dipstick and check the level on the dip-
stick.
• Add oil (if necessary) to bring the level up to the full
mark. o not overfill. Close engine door.
• Check radiator for proper coolant level. (Fill if nec-
essary).
• See Engine Owner’s Manual for specific oil and
coolant recommendations.
ADD FUEL
• Stop engine while fueling.
• Do not smoke when fueling.
• Keep sparks and flame away
from tank.
• Do not leave unattended while
fueling.
• ipe up spilled fuel and allow
fumes to clear before starting
engine.
• Do not overfill tank, fuel
expansion may cause over-
flow.
D ESEL FUEL ONLY-Low sulphur fuel or ultra low
sulphur fuel in U.S.A. and Canada.
--------------------------------------------------------------------------------
• Remove the fuel tank cap.
• Fill the tank approximately 4 inches (100mm) from
the top of the filler neck to allow for fuel expansion .
O NOT FILL THE TANK TO THE POINT OF
OVERFLOW.
• Replace the fuel cap and tighten securely.
• See Engine Owner’s Manual for specific fuel recom-
mendations.
BREAK- N PER OD
Any engine will use a small amount of oil during its
“break-in” period. For the diesel engine on the
Ranger® 305 (AU), break-in is about 50 running
hours.
Check the oil every four hours during break-in.
Change the oil after the first 50 hours of
operation,every 100 hours thereafter. Change the oil
filter at the second oil change.
During break-in, subject the Ranger® 305D (AU) to
moderate loads. Avoid long periods running at
idle. Before stopping the engine, remove all loads
and allow the engine to cool several minutes.
--------------------------------------------------------------------------------
WARN NG
WARN NG
CAUT ON
D ESEL FUEL
can cause fire.

FIGURE B.1
B-2
OPERAT ON
B-2
WELD NG CONTROLS (Figure B.1)
1. OUTPUT CONTROL- The OUTPUT dial is
used to preset the output voltage or current as dis-
played on the digital meters for the four welding
modes. When in the CC-STICK, OWNHILL PIPE
or CV-WIRE modes and when a remote control is
connected to the 6-Pin or 14-Pin Connector, the
auto-sensing circuit automatically switches the
OUTPUT CONTROL from control at the welder to
the remote control.
In the CV-WIRE mode, when the wire feeder con-
trol cable is connected to the 14-Pin Connector, the
auto-sensing circuit automatically makes OUTPUT
CONTROL inactive and the wire feeder voltage
control active.
When in the TOUCH START TIG mode and when a
Amptrol is connected to the 6-Pin Connector, the
OUTPUT dial is used to set the maximum current
range of the CURRENT CONTROL of the Amptrol.
2. D G TAL OUTPUT METERS-The digital
meters allow the output voltage (CV-WIRE mode)
or current (CC-STICK, OWN HILL PIPE and TIG
modes) to be set prior to welding using the OUT-
PUT control dial. uring welding, the meter dis-
play the actual output voltage (VOLTS) and cur-
rent (AMPS). A memory feature holds the display
of both meters on for seven seconds after welding
is stopped. This allows the operator to read the
actual current and voltage just prior to when weld-
ing was ceased.
While the display is being held the left-most deci-
mal point in each display will be flashing. The
accuracy of the meters is +/- 3%.
3. WELD MODE SELECTOR SW TCH-
(Provides four selectable welding modes)
CV-WIRE
OWNHILL PIPE
CC-STICK
TOUCH START TIG
RANGER® 305D (AU)
1
10
7
4
9
5
8
11
12
13
6
15
14
17
16
2
3
F GURE B.1

B-3
OPERAT ON
B-3
4. ARC CONTROL- The ARC CONTROL dial is active in
the CV-WIRE, CC-STICK and OWNHILL PIPE modes,
and has different functions in these modes. This control is
not active in the TIG mode.
CC-ST CK mode: In this mode, the ARC CONTROL dial
sets the short circuit current (arc-force) during stick welding
to adjust for a soft or crisp arc. Increasing the dial from –10
(soft) to +10 (crisp) increases the short circuit current and
prevents sticking of the electrode to the plate while welding.
This can also increase spatter. It is recommended that the
ARC CONTROL be set to the minimum number without
electrode sticking. Start with a setting at 0.
DOWNH LL P PE mode: In this mode, the ARC CONTROL
dial sets the short circuit current (arc-force) during stick
welding to adjust for a soft or a more forceful digging arc
(crisp). Increasing the number from –10 (soft) to +10 (crisp)
increases the short circuit current which results in a more
forceful digging arc. Typically a forceful digging arc is pre-
ferred for root and hot passes. A softer arc is preferred for fill
and cap passes where weld puddle control and deposition
("stacking" of iron) are key to fast travel speeds. It is recom-
mended that the ARC CONTROL be set initially at 0.
CV-W RE mode: In this mode, turning the ARC CONTROL
clock wise from –10 (soft) to +10 (crisp) changes the arc
from soft and washed-in to crisp and narrow. It acts as an
inductance/pinch control. The proper setting depends on the
procedure and operator preference. Start with a setting of 0.
5. WELD OUTPUT TERM NALS W TH FLANGE
NUT- Provides a connection point for the electrode and
work cables.
6. GROUND STUD- Provides a connection point for
connecting the machine case to earth ground.
7. 14-P N CONNECTOR- For attaching wire feeder con-
trol cables to the Ranger® 305 (AU). Includes contactor
closure circuit, auto-sensing remote control circuit, and
120V and 42V power. The remote control circuit operates
the same as the 6 Pin Amphenol.
8. 6-P N CONNECTOR- For attaching optional remote
control equipment. Includes auto-sensing remote control
circuit.
9. WELD TERM NALS CONTROL SW TCH- In the
WEL TERMINALS ON position, the output is electrically
hot all the time. In the REMOTELY CONTROLLE posi-
tion, the output is controlled by a wire feeder or amptrol
device, and is electrically off until a remote switch is
depressed.
10. W RE FEEDER VOLTMETER SW TCH:
Matches the polarity of the wire feeder voltmeter to
the polarity of the electrode.
ENG NE CONTROLS: (Figure B.2)
11. RUN/STOP SW TCH - RUN position energizes
the engine prior to starting. STOP position stops the
engine. The oil pressure interlock switch prevents
battery drain if the switch is left in the RUN position
and the engine is not operating.
12. GLOW PLUG PUSH BUTTON -
• When pushed activates the glow plugs. Glow plug
should not be activated for more than 20 seconds
continuously.
13. START PUSH BUTTON -
Energizes the starter motor to crank the engine.
14. DLER SW TCH- Has two positions as follows:
1) In the HIGH position, the engine runs at the high
idle speed controlled by the engine governor.
2) In the AUTO position, the idler operates as follows:
• When switched from HIGH to AUTO or after starting
the engine, the engine will operate at full speed for
approximately 12 seconds and then go to low idle
speed.
• When the electrode touches the work or power is
drawn for lights or tools (approximately 100 Watts
minimum), the engine accelerates and operates at
full speed.
• When welding ceases or the AC power load is
turned off, a fixed time delay of approximately 12
seconds starts. If the welding or AC power load is
not restarted before the end of the time delay, the
idler reduces the engine speed to low idle speed.
• The engine will automatically return to high idle
speed when there is welding load or AC power load
reapplied.
RANGER® 305D (AU)

B-4
OPERAT ON
B-4
15. ELECTR C FUEL GAUGE- The electric fuel
gauge gives accurate and reliable indication as to
how much fuel is in the fuel tank.
16. ENG NE HOUR METER- isplays the total
time that the engine has been running. This meter
is useful for scheduling prescribed maintenance.
17. ENG NE PROTECT ON L GHT- A warning
indicator light for Low Oil Pressure and/or Coolant
Over Temperature. The light is off when the sys-
tems are functioning properly. The light turns on
when the RUN-STOP switch is in the “ON” posi-
tion prior to starting the engine. If the Engine
Protection or Battery Charging Lights do “not”
turn off shortly after starting the engine shut off
the engine immediately and determine the cause.
AUX L ARY POWER CONTROLS
(Items 18-21)
18. C RCU T BREAKERS
These circuit breakers provide separate overload
current protection for each 240V receptacles, the
42VAC in the 14-Pin connector and battery cir-
cuit overload protection.
19. 240 VAC RECEPTACLES
These two 240VAC receptacles provide up to 15
amp total rating each and are IP66 rated. Refer
to the AUXILIARY POWER RECEPTACLES
section in the installation chapter for further infor-
mation about these receptacles. Also refer to the
AUXILIARY POWER OPERATION section later
in this chapter.
20. RCD:
“Residual Current evice” provides protection
from active to ground contact.
RC will not protect against electrical shock
resulting from contact with active and neutral
wires.
21. VRD ND CATOR L GHTS:
(Part of Optional VRD Kit)
Indicates OCV voltage across the output termi-
nals. Also indicates operation of VR in CC
mode. A Green light indicates OCV below 30V
and a red light indicates OCV above 30V.
uring welding both lights will flash, depending on
the type of Consumable being used.
RANGER® 305D (AU)

B-5
OPERAT ON
B-5
START NG THE ENG NE
1. Remove all plugs connected to the AC power
receptacles.
2. Set I LER switch to AUTO.
3. Set the RUN/STOP switch to RUN.
4. Press Glow Plug Button and hold 5 to 10 seconds.
5. Press and hold both the “Glow Plug” Button and
START button together until the engine starts or for
up to 10 seconds.
6. Release the engine START button immediately
when the engine starts.
7. Release the glow plug button after the Engine
Protection Light turns off or after an additional 5
seconds maximum.
8. The engine will run at high idle speed for approxi-
mately 12 seconds and then drop to low idle speed.
Allow the engine to warm up at low idle for several
minutes before applying a load and/or switching to
high idle. Allow a longer warm up time in cold
weather.
NOTE: If the unit fails to start repeat step 4 through
step 7 after waiting 30 seconds
• Do not allow the starter motor to run continuously
for more than 20 seconds.
• Do not push the START button while the engine
is running because this can damage the ring
gear and/or the starter motor.
• F the Engine Protection or Battery Charging
Lights do “not” turn off shortly after starting the
engine shut off the engine immediately and deter
mine the cause.
--------------------------------------------------------------------------------
NOTE: When starting a Ranger® 305 (AU) for the
first time, or after and extended period of time of not
operating, it will take longer than normal because the
fuel pump has to fill the fuel system.
STOPP NG THE ENG NE
Remove all welding and auxiliary power loads and
allow the engine to run at low idle speed for a few
minutes to cool the engine.
STOP the engine by placing the RUN-STOP switch in
the STOP position.
NOTE: A fuel shut off valve is located on the fuel pre-
filter.
WELDER OPERAT ON
DUTY CYCLE
uty Cycle is the percentage of time the load is being
applied in a 10 minute period. For example a 60% duty
cycle, represents 6 minutes of load and 4 minutes of no
load in a 10 minute period.
RANGER® 305D (AU)
CAUT ON
TYP CAL Ranger® 305D (AU) FUEL CONSUMPT ON
Kubota 722 Running time for
Gal./Hr (Liters/Hr) 12 gallons-hours
Low Idle - No Load
2450 R.P.M. .29 (1.09) 41.77
High Idle - No Load
3650 R.P.M. .54 (2.06) 22.02
C Weld Output
250 Amps @ 28 Volts 1.03 (3.91) 11.62
C Weld Output
300 Amps @ 29 Volts 1.18 (4.47) 10.16
7,000 Watts .96 (3.63) 12.50
3,000 Watts .70 (2.67) 17.03
TABLE B.1