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B-4
OPERATION
B-4
FIGURE B.2
DIESEL 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 for approximate-
ly 8 seconds and then go to 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 o with a
Ranger 300D - When the electrode touches work,
the welding arc is initiated and the engine to
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
accelerate 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 is drawn
(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.
3. START PUSH-BUTTON: When the push-
button is held, the starter motor cranks over
the engine - release the Button once the engine
starts.
NOTE: If you press the START push-button when the
engine is running, you may damage the ring gear or
starter motor.
4. ENGINE HOUR METER: Records engine running
time. Use to determine when to perform required
maintenance.
5. BATTERY LIGHT: Is off when battery charging
system is functioning normally. If the red light
turns on while the engine is running, the fan belt
may be broken or the alternator or the voltage reg-
ulator may be defective.
It is normal for the light to go on when the “Engine”
switch is switched to the “ON” position with the
engine not running. It will go off after one minute
to prevent discharging the battery if the engine is
not started. If this happens, the engine protection
circuit must be reset by turning the “Engine” switch
to the “OFF” position and back to the “ON” posi-
tion.
6. OIL PRESSURE LIGHT: Remains off with
proper oil pressure. If the red light turns on
while the engine is running, the engine pro-
tection system will stop the engine.
It is normal for the light to go on when the “Engine”
switch is switched to the “ON” position with the
engine not running. It will go off after one minute
to prevent discharging the battery if the engine is
not started. If this happens, the engine protection
circuit must be reset by turning the “Engine” switch
to the “OFF” position and back to the “ON” posi-
tion.
RANGER 300 D AND 300 DLX
1
8
9
5
6
4
7
FE
3
2