Lincoln Electric LF-72/74 Service Manual page 65

Section BB-1
Operation..............................................................................................................Section BB
Safety Precautions .....................................................................................................BB-2
Graphic Symbols .......................................................................................................BB-2
Common Welding Abbreviations ...............................................................................BB-2
Product Description ...................................................................................................BB-3
Recommended Processes and Required Equipment ...............................................BB-3
Front Panel Controls and Connections .....................................................................BB-4
1. Wire Feed Speed Knob ....................................................................................BB-5
2. Remote Voltage Control Kit (Optional) .............................................................BB-5
3. Burnback and Postflow Timer Kit (Optional)....................................................BB-5
4. Thermal LED, Motor Overload .........................................................................BB-5
5. Cold Feed/Gas Purge Switch...........................................................................BB-5
6. 2 Step - Trigger Interlock Switch .....................................................................BB-6
7. Gun Receiver Bushing......................................................................................BB-6
8. Trigger Connector 5-Pin Amphenol..................................................................BB-6
TABLE OF CONTENTS
- OPERATION SECTION -
POWER FEED 10M SINGLE/DUAL
Section BB-1