B-3

OPERATION

B-3

 

 

 

ENGINE CONTROLS

IGNITION SWITCH

When placed in the “ON” position, this switch ener- gizes the fuel solenoid. When placed in the “OFF” posi- tion, the flow of fuel to the injection pump is stopped to shut down the engine.

“IDLER” SWITCH

The idler switch has

two

positions, “HIGH” and

“AUTO”.

 

 

When in “HIGH” (

) position, the engine will run

continuously at high idle.

 

When in “AUTO” (

/

) idle position, the idler

operates as follows:

 

 

a.Welding

When the electrode touches the work, the welding arc is initiated and the engine accelerates to full speed.

After 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 weld- ing) for 10-14 seconds, the idler reduces the engine speed to low idle.

ENGINE TEMPERATURE GAUGE

Displays the coolant temperature in the engine block.

ENGINE 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.

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

The engine hour meter records the total running 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 engine oil pres- sure conditions by allowing the fuel solenoid valve to close.

AIR INTAKE SHUT-OFF

The air intake shut-off is a manually engaged device that blocks all intake air from entering the engine.

To shut down the engine, simply pull the emergency stop handle on the lower control panel.

The air intake shut-off device must be reset manually inside the welder.

•Place the ignition toggle switch in the "OFF" position

•Manually turn the air intake shut-off reset handle such that the handle is in-line with the air intake hoses. The air intake shut-off is located on the top of the engine between the muffler and air filter.

WARNING

• Muffler and Engine may be hot!

IMPORTANT: Before restarting engine, verify that the air intake shut-off is in the open position. DO NOT ATTEMPT TO START ENGINE WITH THE AIR INTAKE SHUT-OFF IN THE CLOSED POSITION. This may cause severe damage to the engine.

SAE-400 SEVERE DUTY

Page 14 Page 16
Page 15
Image 15
Lincoln Electric IM727 manual Engine Controls
Page 14 Page 16

IM727 specifications

Lincoln Electric IM727 is a highly regarded machine in the welding industry, particularly known for its remarkable performance and innovative features. This versatile inverter-based welding machine has been designed to meet the demands of various welding applications while ensuring ease of use and efficiency.

One of the standout features of the IM727 is its advanced inverter technology. This technology allows for a more compact design while maintaining exceptional power output and energy efficiency. With a lightweight structure, the IM727 is easy to transport, making it an ideal choice for both field work and shop environments.

The IM727 is equipped with a wide range of welding processes, including MIG, TIG, and Stick welding. This versatility allows users to switch between different welding methods depending on the specific requirements of a project, making it highly adaptable to various materials such as steel, stainless steel, and aluminum. The intuitive interface provides straightforward controls, making the setup process quick and easy for both novice and experienced welders.

Another significant characteristic of the IM727 is its precise arc control, which enhances the quality of the welds. The machine features digital control circuitry that offers consistent arc stability, reducing spatter and improving the final appearance of the weld bead. This not only reduces the amount of post-weld cleanup required but also ensures stronger, more reliable welds.

Safety is a paramount concern in welding, and the IM727 comes equipped with several protective features. Overcurrent protection, thermal overload protection, and a built-in fan ensure that the machine operates safely and reliably. These features extend the machine’s lifespan and provide peace of mind to the user.

Furthermore, the IM727 is designed with user-friendly accessibility in mind. The front panel provides clear indicators and settings to facilitate easy operation, while the rugged construction ensures durability even in harsh working conditions.

In conclusion, Lincoln Electric IM727 stands out as a versatile welding machine with advanced inverter technology, multiple welding capabilities, and a focus on user safety and convenience. Its combination of portability, performance, and reliability makes it an excellent choice for professionals looking to elevate their welding operations. Whether used in a busy fabrication shop or on-site repairs, the IM727 is engineered to deliver exceptional results in diverse welding scenarios.
Top Page Image Contents