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OPERATION
B-7 B-7
RANGER 300 D AND 300 DLX
FIGURE B.2
ENGINE CONTROLS
ENGINE CONTROLS
See Figure B.2 for the location of the following fea-
tures:
1. GLOW PLUG PUSH-BUTTON: Activates
glow plugs to preheat engine for starting.
2. IDLER CONTROL SWITCH: The idler switch has
two positions, “HIGH” and “AUTO”.
When in “HIGH” ( ) position, the engine will
run continuously at high speed.
When in “AUTO” ( / ) idle position, the
idler operates as follows:
a) Welding
Low idle with Ranger 300 DLX in the “WELDING
TERMINALS ALWAYS ON” mode or with a Ranger
300D - When the electrode touches work, the
welding arc is initiated and the engine accelerates
to full speed.
Low idle and in the “WELDING TERMINALS
REMOTELY CONTROLLED” mode - Pressing the
gun trigger or Amptrol closes the Ranger 300 DLX
output contactor and causes the engine to accel-
erate to full speed.
After the gun trigger or Amptrol is released and/or
welding ceases (and no auxiliary power is being
drawn), the engine will return to low idle after
approximately 10 to 14 seconds.
b) Auxiliary Power
With the engine running at low idle and auxiliary
power for lights or tools drawing approximately
100-150 watts or greater from the receptacles, the
engine will accelerate to high speed. If no power is
being drawn from the receptacles (and not welding)
for 10-14 seconds, the engine returns to low idle.
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