WELDER OPERATION
WARNING
ELECTRIC SHOCK can kill.
•Do not touch electrically live parts or electrode with skin or wet clothing.
•Insulate yourself from work and ground.
FUMES & GASES can be dangerous.
• Keep your head out of the fumes.
•Use ventilation or exhaust to remove fumes from breathing zone.
WELDING SPARKS can cause fire or 
explosion.
•Keep flammable material away.
When a forceful “digging” arc is required, usually for vertical and overhead welding, use a higher “Current Range Selector” setting and lower open circuit volt- age. For example: to obtain 175 amps and a forceful arc, set the “Current Range Selector” to the
CAUTION
DO NOT attempt to set the “Current Range Selector” between the five points designated on the nameplate.
These switches have a spring loaded cam which almost eliminates the possibility of setting this switch between the designated points.
ARC RAYS can burn.
• Wear eye, ear, and body protection.
Duty Cycle
The NEMA output rating of the
(1)The Lincoln “plus output” rating at 60% duty cycle
is 250 amperes at 40 volts.
Control of Welding Current
CAUTION
DO NOT TURN THE “CURRENT RANGE SELEC- TOR” WHILE WELDING because the current may arc between the contacts and damage the switch.
The “Current Range Selector” provides five overlap- ping current ranges. The “Fine Current Adjustment” adjusts the current from minimum to maximum within each range. Open circuit voltage is also controlled by the “Fine Current Adjustment” permitting control of the arc characteristics.
A high open circuit voltage setting provides the soft “buttering” arc with best resistance to
Idler Operation
Start the engine with the “Idler Control” switch in “High Idle” position. Allow it to run at high idle speed for several minutes to warm the engine. The operat- ing speeds are as follows:
ORDERING | ENGINE | FULL | HIGH | LOW |
INFO. |
| LOAD | IDLE | IDLE |
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K1283- | Perkins | 1725 | 1800 | 1350 |
ALL | Diesel |
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The idler is controlled by an “Idler Control” toggle switch on the welder control panel. The switch has two positions as follows:
1.In the “High” 
position, the idler is off, and the engine runs at the high speed controlled by the governor.
2. In the “Automatic” | / | position, the |
idler operates as follows: |
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a. When welding or drawing power for lights or tools (approximately
b. When welding ceases or the power load is turned off, a preset time delay of about 15 sec- onds starts. This time delay cannot be adjust- ed.
c.If the welding or power load is not
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