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B-1
OPERATING PRECAUTIONS
WARNING
Do not attempt to use this equipment until you
have thoroughly read the engine manufacturer's
manual supplied with your welder. It includes
important safety precautions, detailed engine
starting, operating and maintenance instructions,
and parts lists.
PIPE THAWING
WARNING
PIPE THAWING can result in fire or
explosion.
Only connect welder across
FROZEN section of CONTINUOUS
METAL PIPE.
While thawing, remove any ground leads
nected to Frozen pipe.
Turn welder on AFTER cables are connected to
pipe. Turn off when done.
IMPORTANT: DO NOT USE A WELDER TO THAW A
PIPE BEFORE REVIEWING LINCOLN BULLETIN
E695.1 (dated May 1987 or later). This bulletin may be
obtained from your local Lincoln distributor or by writ-
ing directly to Lincoln Electric at the address on the
back of this manual.
ADDITIONAL SAFETY PRECAUTIONS
Always operate the welder with the hinged doors
closed as these provide maximum protection from
moving parts and insure proper cooling air flow.
Read carefully the Safety Precautions page in the
Instruction Manual before operating this machine.
Always follow these and any other safety procedures
included in this manual and in the engine instruction
manual.
ENGINE CONTROLS:
FUNCTION/OPERATION
IGNITION SWITCH
When placed in the "ON" position, this switch energizes
the fuel solenoid. When placed in the "OFF" position,
the flow of fuel to the injection pump is stopped to shut
down the engine.
OPERATION
SPEED CONTROL LEVER
Manually allows the engine to run at its high idle speed
controlled by the governor or at the factory set low idle
speed. When welding or using auxiliary power the
speed control lever must be in the "RUN" position. To
reduce the engine to low idle speed when not welding
or not using auxiliary power place the speed control
lever in the "IDLE" position notch.
ENGINE TEMPERATURE GAUGE
Displays the coolant temperature in the engine block.
OIL PRESSURE GAUGE
Displays the oil pressure to the engine. When the
engine starts running, watch for the oil pressure to
build up. If no pressure shows within 30 seconds, stop
the engine and consult the engine instruction manual.
con-
BATTERY CHARGING AMMETER
Displays the current going from the charging alternator
into the batteries. It is normal for charging current to be
high (above 15 amps) after starting or when the batter-
ies are 'low' on charge.
ENGINE HOUR METER (Factory Installed Optional
Feature)
The optional engine hour meter records the total run-
ning time on the engine in hours. It can be used to keep
a record of maintenance on the engine and or welder.
ENGINE PROTECTION SYSTEM
The engine protection system shuts down the engine
under high coolant temperature or low oil pressure
conditions by allowing the fuel solenoid valve to close.
SAM400 & 650
B-1
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