5-6. Engine Prestart Checks

Check radiator coolant level when fluid is low in recovery tank.

Full

Diesel

Full

.Check all engine fluids daily.

Engine must be cold and on a level surface. Unit is shipped with 20W break-in oil.

Automatic shutdown system stops engine if oil pressure is too low or coolant tempera- ture is too high.

.This unit has a low oil pressure shut- down switch. However, some condi- tions may cause engine damage before the engine shuts down. Check oil level often and do not use the oil pressure shutdown system to monitor oil level.

Follow run-in procedure in engine manual. If unburned fuel and oil collect in exhaust pipe during run-in, see Section 10.

Fuel

NOTICE − Do not use gasoline. Gasoline will damage engine.

The unit is shipped with enough fuel to pre- vent air from entering fuel system. Add fresh diesel fuel before starting (see engine main- tenance label for fuel specifications). Leave filler neck empty to allow room for expansion.

Do not run out of fuel or air will enter fuel sys- tem and cause starting problems. See en- gine manual to bleed air from fuel system.

Oil

After fueling, check oil with unit on level sur- face. If oil is not up to full mark on dipstick, add oil (see maintenance label).

Coolant

Check coolant level in radiator before start- ing unit the first time. If necessary, add cool- ant to radiator until coolant level is at bottom of filler neck.

Check coolant level in recovery tank daily. If necessary, add coolant to recovery tank until coolant level is between Cold Full and Hot Full levels. If recovery tank coolant level was low, also check coolant level in radiator. Add coolant if level is below bottom of radia- tor filler neck.

Unit is shipped with an engine coolant mix- ture of water and ethylene glycol base anti-

freeze rated to −34° F (−37° C). Add anti-

Full

Capacity: 6 qt (5.7 L)

Coolant Recovery Tank

Hot Full

Cold Full

803 563

freeze to mixture if using the unit in tempera- tures below −34° F (−37° C).

Keep radiator and air intake clean and free of dirt.

NOTICE − Incorrect engine temperature can damage engine. Do not run engine with- out a properly working thermostat and ra- diator cap.

.To improve cold weather starting: Use Preheat switch (see Section 6-1).

Keep battery in good condition. Store battery in warm area.

Use fuel formulated for cold weather (diesel fuel can gel in cold weather). Contact local fuel supplier for fuel in- formation.

Use correct grade oil for cold weather (see Section 8-2).

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Miller Electric Big Blue 300 manual Engine Prestart Checks, Fuel, Oil, Coolant Recovery Tank
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Big Blue 300 specifications

The Miller Electric Big Blue 300 is a powerful and versatile engine-driven welder that has become a popular choice for professionals in various industries. Designed to excel in both welding and generator applications, the Big Blue 300 provides reliable performance, advanced technology, and exceptional durability, making it suitable for demanding work environments.

One of the standout features of the Big Blue 300 is its impressive output capabilities. With a maximum welding output of 300 amps, this machine can handle a wide range of welding applications, from stick to TIG and MIG processes. The dual voltage output allows for versatility in the field, accommodating both 120V and 240V power requirements, ensuring you can power tools and equipment directly from the welder.

The Big Blue 300 is equipped with Miller's innovative Clean Air Technology, which ensures that the engine operates efficiently and produces fewer emissions. This feature not only meets environmental standards but also enhances the longevity of the machine. The cooling system is engineered to maintain optimal operating temperatures, extending the life of the engine and related components.

For ease of use, the Big Blue 300 features an intuitive control panel with easy-to-read gauges and simple adjustment settings, allowing operators to quickly set welding parameters. The built-in Fuel Gauge and Hour Meter provide real-time information about fuel levels and usage, enabling efficient operation and maintenance planning.

Another notable characteristic of the Big Blue 300 is its rugged construction. Built to withstand harsh job site conditions, the machine features a durable frame and heavy-duty components that can endure the rigors of everyday use. The oversized wheels and solid axle design enhance portability, making it easy to transport across various terrains.

Additionally, the Big Blue 300 is designed for quiet operation, making it suitable for locations where noise levels are a concern. Its low decibel rating ensures that it won’t disturb the work environment, contributing to a more comfortable and productive atmosphere.

Overall, the Miller Electric Big Blue 300 is a robust engine-driven welder that combines power, efficiency, and portability. Whether working on construction sites, maintenance tasks, or fabrication projects, this machine delivers exceptional performance and reliability, making it a valuable tool for professionals who demand the best in their equipment.
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