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Hobart Welding Products
OM-240 438B
manual
Maintenance − KOHLER-POWERED Units
Models:
OM-240 438B
1
42
72
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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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A complete Parts List is available at wwwHobartWelders.com
SECTION 9 − MAINTENANCE −
(KOHLER-POWERED
UNITS)
9-1.
Maintenance Label
(Kohler-Powered
Units)
OM-240
438 Page 38
Page 41
Page 43
Page 42
Image 42
Page 41
Page 43
Contents
OM-240 438B
Processes
Description
From Hobart to You
Protect Your Investment
Table of Contents
10-3
10-1
10-2
11-1
Electric Shock can kill
Symbol Usage
Arc Welding Hazards
HOT Parts can burn
ARC Rays can burn eyes and skin
Fumes and Gases can be hazardous
Buildup of GAS can injure or kill
Welding can cause fire or explosion
Engine Hazards
Hydraulic Hazards
Hydraulic Fluid can injure or kill
Use only genuine replacement parts from the manufacturer
Compressed Air Hazards
Compressed AIR Equipment can injure or kill
Falling Equipment can injure
Welding Wire can injure
Fire or Explosion hazard
Overheating can damage motors
Radiation can cause interference
Principal Safety Standards EMF Information
California Proposition 65 Warnings
ARC Welding can cause interference
UN Choc Électrique peut tuer
Signification des symboles
− Consignes DE Sécurité − Lire Avant Utilisation
Indique des instructions spécifiques
LE Soudage peut provoquer un incendie ou une explosion
LES Pièces Chaudes peuvent provoquer des brûlures
LES Fumées ET LES GAZ peu- vent être dangereux
LE Bruit peut affecter l’ouïe
’EXPLOSION DE LA Batterie peut provoquer des blessures
Les Pièces Mobiles peuvent causer des blessures
LA Chaleur DU Moteur peut pro- voquer un incendie
Les Pièces Mobiles peuvent causer des blessures
Lire LES Instructions
LA Chute DE L’ÉQUIPEMENT peut provoquer des blessures
Risque D’INCENDIE OU
LES Fils DE Soudage peuvent 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
Informations relatives aux CEM
En ce qui concerne les implants médicaux
Weld, Power, and Engine Specifications
− Specifications
Symbol Definitions
− Definitions
Dimensions, Weights, And Operating Angles
Complete Parts List is available at wwwHobartWelders.com
Weight 562 lb 254 kg
Duty Cycle
Dimensions For Units With Optional Running Gear
Dimensions
Welding Amperes
Fuel Consumption Subaru-Powered Units
Fuel Consumption Kohler-Powered Units
For CC/DC Mode
Generator Power Curve
For CC/AC 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
Connect negative − battery cable last
Installing Exhaust Pipe
Connecting Or Replacing the Battery
+ − + −
Connecting To Weld Output Terminals
Stop engine Failure to properly connect
Tools Needed 3/4
350 ft 400 ft 45 m 60 m 70 m 90 m 105 m 120 m
Selecting Weld Cable Sizes
150 ft 200 ft 250 ft
100 150 200 250
Front Panel Controls
Engine Control Switch
− Operating the Welding Generator
Fine Control
Loaded
Cold Weather Engine Operation
Infrequently
Frequently
Typical Stick Welding Connections And Control Settings
Stop engine
Electrode
− Operating Auxiliary Equipment
Standard Receptacles
Current Available in Amperes 240
Simultaneous Weld And Power
Wiring Optional 240 Volt Plug
Receptacle
− Maintenance SUBARU-POWERED Units
Maintenance Label Subaru-Powered Units
100
Routine Maintenance Subaru-Powered Units
Stop engine before maintaining
200
Servicing Air Cleaner Subaru-Powered Units
Servicing Optional Spark Arrestor Subaru-Powered Units
Stop engine and let cool
Oil Fill Oil Check
Oil Drain Valve Oil Filter
Adjusting Engine Speed Subaru-Powered Units
Idle Speed Adjustment
Overload Protection Subaru-Powered Units
Stop engine. Disconnect negative − battery cable
Fuse F1 See Section
− Maintenance − KOHLER-POWERED Units
Maintenance Label Kohler-Powered Units
Routine Maintenance Kohler-Powered Units
Hours Nl Weld Cables ~ Slip Rings Nl Brushes OM-240 438
Servicing Air Cleaner Kohler−Powered Units
Close valve and valve cap
Stop engine and let cool Oil Drain Valve
2 ID x 7 in Hose Oil Filter
Full Before adding oil Running engine
Loosen lock nut. Turn adjustment
Adjusting Engine Speed Kohler-Powered Units
Adjustment Nut
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
Generator Power Troubleshooting
− Troubleshooting
Welding Troubleshooting
Trouble Remedy
Engine Troubleshooting
Check receptacle wiring and connections
Check fuel level
Recommended Spare Parts
− Parts List
Control switch S2, and throttle solenoid TS1
Recommended Spare Parts
SOCKET/WRENCH Selection Table Standard Metric
− Electrical Diagrams
Circuit Diagram For Welding Generator
240 424-A
− Generator Power Guidelines
Selecting Equipment
Use ground device as stated
Grounding When Supplying Building Systems
How Much Power Does Equipment Require?
Electrical codes
Industrial Motors Rating Starting Watts Running Watts
Approximate Power Requirements For Industrial Motors
Approximate Power Requirements For Farm/Home Equipment
Farm/Home Equipment Rating Starting Watts Running Watts
Approximate Power Requirements For Contractor Equipment
Contractor Rating Starting Watts Running Watts
Single-Phase Induction Motor Starting Requirements
Power Required To Start Motor
How Much Power Can Generator Supply?
KVA/HP x HP x 1000 / Volts = Starting Amperage
Typical Connections To Supply Standby Power
Tional, state, and local codes
Selecting Extension Cord Use Shortest Cord Possible
Electrode touches work
Stick Welding Procedure
− Stick Welding Smaw Guidelines
Tools Needed Equipment Needed Piece Weld current can damage
Scratch Technique
Electrode and Amperage Selection Chart
Striking an Arc
Tapping Technique
Positioning Electrode Holder
Poor Weld Bead Characteristics
Good Weld Bead Characteristics
Groove Welds Fillet Welds
Conditions That Affect Weld Bead Shape
Electrode Movement During Welding
Electrode Angle
Butt Joints
Lap Joint
Tee Joint
To 3 51-76 mm .4 mm
Troubleshooting
Weld Test
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
Contact your Distributor for
Hobart Welding Products
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