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Hobart Welding Products
OM-240 438B
manual
Models:
OM-240 438B
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Troubleshooting
Specification
Poor Weld Bead Characteristics
Install
Parts list
Electrical Diagrams
Symbol Usage
Welding Wire can injure
Dimension
Stick Welding Procedure
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Notes
OM-240
438 Page 65
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Contents
OM-240 438B
Processes
Description
Protect Your Investment
From Hobart to You
Table of Contents
10-2
10-1
10-3
11-1
Arc Welding Hazards
Symbol Usage
Electric Shock can kill
HOT Parts can burn
Buildup of GAS can injure or kill
Fumes and Gases can be hazardous
ARC Rays can burn eyes and skin
Welding can cause fire or explosion
Hydraulic Hazards
Engine Hazards
Compressed Air Hazards
Use only genuine replacement parts from the manufacturer
Hydraulic Fluid can injure or kill
Compressed AIR Equipment can injure or kill
Fire or Explosion hazard
Welding Wire can injure
Falling Equipment can injure
Overheating can damage motors
California Proposition 65 Warnings
Principal Safety Standards EMF Information
Radiation can cause interference
ARC Welding can cause interference
− Consignes DE Sécurité − Lire Avant Utilisation
Signification des symboles
UN Choc Électrique peut tuer
Indique des instructions spécifiques
LES Fumées ET LES GAZ peu- vent être dangereux
LES Pièces Chaudes peuvent provoquer des brûlures
LE Soudage peut provoquer un incendie ou une explosion
LE Bruit peut affecter l’ouïe
Les Pièces Mobiles peuvent causer des blessures
’EXPLOSION DE LA Batterie peut provoquer des blessures
Les Pièces Mobiles peuvent causer des blessures
LA Chaleur DU Moteur peut pro- voquer un incendie
Lire LES Instructions
LES Fils DE Soudage peuvent provoquer des blessures
Risque D’INCENDIE OU
LA Chute DE L’ÉQUIPEMENT peut provoquer des blessures
LE Surchauffement peut endommager le moteur électrique
Proposition californienne 65 Avertissements
Principales normes de sécurité
LE Soudage À L’ARC risque de provoquer des interférences
En ce qui concerne les implants médicaux
Informations relatives aux CEM
Symbol Definitions
− Specifications
Weld, Power, and Engine Specifications
− Definitions
Dimensions, Weights, And Operating Angles
Complete Parts List is available at wwwHobartWelders.com
Weight 562 lb 254 kg
Dimensions
Dimensions For Units With Optional Running Gear
Duty Cycle
Welding Amperes
Fuel Consumption Kohler-Powered Units
Fuel Consumption Subaru-Powered Units
For CC/AC Mode
Generator Power Curve
For CC/DC Mode
Volt-Ampere Curves
− Installation
Installing Welding Generator
Serial Number And Rating Label Location
Grounding Generator To Truck Or Trailer Frame
Engine Prestart Checks Subaru-Powered Units
Oil Check
Oil
Engine Prestart Checks Kohler-Powered Units
Full
To improve cold weather starting
Connecting Or Replacing the Battery
Installing Exhaust Pipe
Connect negative − battery cable last
+ − + −
Connecting To Weld Output Terminals
Stop engine Failure to properly connect
Tools Needed 3/4
150 ft 200 ft 250 ft
Selecting Weld Cable Sizes
350 ft 400 ft 45 m 60 m 70 m 90 m 105 m 120 m
100 150 200 250
− Operating the Welding Generator
Engine Control Switch
Front Panel Controls
Fine Control
Infrequently
Cold Weather Engine Operation
Loaded
Frequently
Typical Stick Welding Connections And Control Settings
Stop engine
Electrode
Standard Receptacles
− Operating Auxiliary Equipment
Wiring Optional 240 Volt Plug
Simultaneous Weld And Power
Current Available in Amperes 240
Receptacle
Maintenance Label Subaru-Powered Units
− Maintenance SUBARU-POWERED Units
Stop engine before maintaining
Routine Maintenance Subaru-Powered Units
100
200
Servicing Air Cleaner Subaru-Powered Units
Servicing Optional Spark Arrestor Subaru-Powered Units
Stop engine and let cool
Oil Drain Valve Oil Filter
Oil Fill Oil Check
Idle Speed Adjustment
Adjusting Engine Speed Subaru-Powered Units
Overload Protection Subaru-Powered Units
Stop engine. Disconnect negative − battery cable
Fuse F1 See Section
Maintenance Label Kohler-Powered Units
− Maintenance − KOHLER-POWERED Units
Hours Nl Weld Cables ~ Slip Rings Nl Brushes OM-240 438
Routine Maintenance Kohler-Powered Units
Servicing Air Cleaner Kohler−Powered Units
2 ID x 7 in Hose Oil Filter
Stop engine and let cool Oil Drain Valve
Close valve and valve cap
Full Before adding oil Running engine
Adjustment Nut
Adjusting Engine Speed Kohler-Powered Units
Loosen lock nut. Turn adjustment
Turn idle speed screw for fine ad- justments
Overload Protection Kohler-Powered Units
Servicing Optional Spark Arrestor Kohler-Powered Units
If a fuse opens, it usually indi
Welding Troubleshooting
− Troubleshooting
Generator Power Troubleshooting
Trouble Remedy
Engine Troubleshooting
Check receptacle wiring and connections
Check fuel level
Control switch S2, and throttle solenoid TS1
− Parts List
Recommended Spare Parts
Recommended Spare Parts
SOCKET/WRENCH Selection Table Standard Metric
Circuit Diagram For Welding Generator
− Electrical Diagrams
240 424-A
Selecting Equipment
− Generator Power Guidelines
How Much Power Does Equipment Require?
Grounding When Supplying Building Systems
Use ground device as stated
Electrical codes
Approximate Power Requirements For Farm/Home Equipment
Approximate Power Requirements For Industrial Motors
Industrial Motors Rating Starting Watts Running Watts
Farm/Home Equipment Rating Starting Watts Running Watts
Contractor Rating Starting Watts Running Watts
Approximate Power Requirements For Contractor Equipment
How Much Power Can Generator Supply?
Power Required To Start Motor
Single-Phase Induction Motor Starting Requirements
KVA/HP x HP x 1000 / Volts = Starting Amperage
Tional, state, and local codes
Typical Connections To Supply Standby Power
Selecting Extension Cord Use Shortest Cord Possible
− Stick Welding Smaw Guidelines
Stick Welding Procedure
Electrode touches work
Tools Needed Equipment Needed Piece Weld current can damage
Striking an Arc
Electrode and Amperage Selection Chart
Scratch Technique
Tapping Technique
Good Weld Bead Characteristics
Poor Weld Bead Characteristics
Positioning Electrode Holder
Groove Welds Fillet Welds
Conditions That Affect Weld Bead Shape
Electrode Movement During Welding
Electrode Angle
Butt Joints
Lap Joint
Tee Joint
Weld Test
Troubleshooting
To 3 51-76 mm .4 mm
Possible Causes Corrective Actions
Lack of Penetration Good Penetration
Good Penetration Excessive Penetration
Metal remains
OM-240 438
OM-240 438
OM-240 438
Service
Support
Assistance
Hobart Welding Products
Contact your Distributor for
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