OM-4411207 283E
Miller LegendR 301 G
Processes
Description
From Miller to You
SECTION 5 − INSTALLATION
TABLE OF CONTENTS
8-2. Maintenance Label 8-3. Servicing Optional Spark Arrestor
TABLE OF CONTENTS
8-4. Servicing Air Cleaner
8-6. Overload Protection 8-7. Troubleshooting
1-2. Arc Welding Hazards
1-1. Symbol Usage
SECTION 1 − SAFETY PRECAUTIONS − READ BEFORE USING
Means “Note” not safety related
BATTERY EXPLOSION can BLIND
1-3. Engine Hazards
WELDING can cause fire or explosion
FLYING METAL can injure eyes
1-4. Compressed Air Hazards
1-5. Additional Symbols For Installation, Operation, And Maintenance
STEAM AND HOT COOLANT can burn
ENGINE EXHAUST GASES can kill
1-6. California Proposition 65 Warnings
1-7. Principal Safety Standards
1-8. EMF Information
READ INSTRUCTIONS
SECTION 2 − CONSIGNES DE SÉCURITÉ − LIRE AVANT UTILISATION
2-1. Signification des symboles
2-2. Dangers relatifs au soudage à l’arc
UN CHOC ÉLECTRIQUE peut tuer
LE SOUDAGE peut provoquer un in- cendie ou une explosion
2-3. Dangers existant en relation avec le moteur
DES PARTICULES VOLANTES peuvent blesser les yeux
DES PIÈCES CHAUDES peuvent provoquer des brûlures graves
L’EXPLOSION DE LA BATTERIE peut RENDRE AVEUGLE
2-4. Dangers liés à l’air comprimé
DES ORGANES MOBILES peuvent provoquer des blessures
LA CHALEUR DU MOTEUR peut pro- voquer un incendie
2-7. Information sur les champs électromagnétiques
2-6. Principales normes de sécurité
LE SURCHAUFFEMENT peut endom- mager le moteur électrique
LES ÉTINCELLES VOLANTES ris- quent de provoquer des blessures
SECTION 3 − DEFINITIONS
3-1. Symbol Definitions
Work like a Pro
4-2. Weld, Power, And Engine Specifications
SECTION 4 − SPECIFICATIONS
4-3. Dimensions, Weights, and Operating Angles
4-1. Description
4-5. Generator Power Curve
4-4. Fuel Consumption While Welding And Using Generator Power
Y Exceeding duty cycle can damage unit and void warranty
4-6. Duty Cycle
Work like a Pro
Continuous Welding
A. CC/DC Stick Mode
4-7. Stick And MIG Mode Volt-Ampere Curves
B. CV/DC MIG Mode
Work like a Pro
4-8. DC TIG Mode Volt-Ampere Curves
5-1. Installing Welding Generator
SECTION 5 − INSTALLATION
Movement Y Do not lift unit from end
Location
Follow run-in procedure in engine manual
5-2. Engine Prestart Checks
To improve cold weather starting Keep battery in good condition
Store battery in warm area Use correct grade oil for cold weather
Y Do not overfill battery cells
5-3. Activating The Dry Charge Battery If Applicable
When electrolyte is low, add
Y Read and follow all instruc
5-5. Installing Exhaust Pipe
5-4. Connecting The Battery
Y Connect negative − cable last
Y Stop engine and let cool
Selecting Weld Cable Sizes
Connecting To Weld Output Terminals
24 VOLTS AC
5-8. Remote Receptacle Information
115 VOLTS AC
AMPERAGE
Y Stop engine and let cool
5-9. Adjusting Wire MIG Weld Puddle Consistency
For wetter weld puddle for mild steel
For wettest weld puddle for stainless steel
6-1. Front Panel Controls
SECTION 6 − OPERATING WELDING GENERATOR
Generator power is available at recep
6-2. Description Of Front Panel Controls
Controlling Engine Speed And Weld/Generator Power Output
Speed Control Switch In Weld Engine Control Switch in 3600/2400 RPM
Process Switch Settings
6-3. Process Switch
Switch Setting
Process
tween pins A and B example
6-4. Remote Amperage/Voltage Control
Engine runs at weld speed when
receptacle makes closure be
SECTION 7 − OPERATING AUXILIARY EQUIPMENT
7-1. 60 Hz Generator Power Receptacles And Circuit Breakers
Controlling Engine Speed And Weld/Generator Power Output
Generator power is available at
Work like a Pro
7-2. Variable Frequency Hz Generator Power Receptacle RC3
ceptacle RC3
1 120 V 20 A Variable Frequency
Receptacle
Each 120 V Duplex
Current Available in Amperes
Receptacle
8-1. Routine Maintenance
SECTION 8 − MAINTENANCE & TROUBLESHOOTING
Every 8 h
20 h
8-3. Servicing Optional Spark Arrestor
8-2. Maintenance Label
Y Stop engine and let cool
803 127 / Ref. 211
Y Do not run engine without air cleaner or with dirty element
8-4. Servicing Air Cleaner
Y Stop engine
Y Stop engine and let cool
8-5. Changing Engine Oil, Oil Filter, And Fuel Filter
Y Close valve and valve cap before adding oil and run- ning engine
Y Stop engine, tighten connec- tions as necessary, and wipe up fuel
When a circuit breaker or fuse
8-6. Overload Protection
Y Stop engine
A. Welding
8-7. Troubleshooting
Trouble
Remedy
C. Variable Frequency Generator Power Receptacle RC3
B. 60 Hz Generator Power Receptacles RC1 And RC2
Trouble
Remedy
Trouble
D. Engine
Remedy
Over 80,000 trained since
Start Your Professional Welding Career Now
400 Trade Square East, Troy, Ohio
Figure 9-1. Circuit Diagram For Welding Generator
SECTION 9 − ELECTRICAL DIAGRAM
211 395-C
OM-4411 Page
10-1. Selecting Equipment
SECTION 10 − GENERATOR POWER GUIDELINES
10-2. Grounding Generator To Truck Or Trailer Frame
has this symbol
10-4. How Much Power Does Equipment Require?
10-3. Grounding When Supplying Building Systems
earth ground if supplying
Use ground device as stated
10-6. Approximate Power Requirements For Farm/Home Equipment
10-5. Approximate Power Requirements For Industrial Motors
Industrial Motors
Rating
Contractor
10-7. Approximate Power Requirements For Contractor Equipment
Rating
Starting Watts
10-9. How Much Power Can Generator Supply?
10-8. Power Required To Start Motor
Single-Phase Induction Motor Starting Requirements
Motor Start
Work like a Pro
10-10. Typical Connections To Supply Standby Power
Cord Lengths for 120 Volt Loads
10-11. Selecting Extension Cord Use Shortest Cord Possible
Current
Load Watts
20 Gauge .037 in 18 Gauge .050 in 16 Gauge .063 in
MATERIAL THICKNESS REFERENCE CHART 24 Gauge .025 in 22 Gauge .031 in
14 Gauge .078 in 1/8 in .125 in 3/16 in .188 in 1/4 in .25 in
5/16 in .313 in 3/8 in .375 in 1/2 in .5 in
SECTION 11 − PARTS LIST
Figure 11-1. Main Assembly
Grommet, Plastic Neck Filler Fuel
Figure 11-1. Main Assembly
Start Your Professional Welding Career Now
Figure 11-1. Main Assembly Continued
Over 80,000 trained since
Front w/Components
Figure 11-2. Panel
Figure 11-2. Panel
Front w/Components Figure 11-1 Item
Figure 11-2. Panel, Front w/Components Continued
Figure 11-2. Bracket w/Components Figure 11-1 Item
Figure 11-3. Bracket w/Components
Hardware is common and not available unless listed
Figure 11-4. Generator
Figure 11-4. Generator Figure 11-1 Item
Stator, Generator
Service
Warranty Questions?
Call 1-800-4-A-MILLER for your local Miller distributor
Support
Owner’s Record
For Service
Please complete and retain with your personal records
Always provide Model Name and Serial/Style Number