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