5.When the water level is near the mouth of the water filler, open drain plugs and start the engine, and run at low idling. Keep the engine running at low idling and flush the radiator for about 10 minutes.

6.Adjust the flow of the water flowing in and draining out to ensure that the radiator is always full during the flushing operation, While flushing water through the system, watch carefully the water inlet hose does not come out of the radiator filler port.

7.After flushing, stop the engine, open drain plug and drain the water, then close drain plugs.

8.After draining the water, flush the system with a flushing agent. See instructions on flushing agent label.

9.After flushing, open drain plugs and drain out all the water, then close drain plugs and add tap water so the water level is near the mouth of the water filler.

10.When the water level is near the mouth of the water filler, open drain plugs and start the engine, run at low idling and continue to flush the system until clean water comes out. Adjust the flow of the water flowing in and draining out to ensure the radiator is always full during the flushing operation.

11.When clean water comes out, stop the engine, drain all the water, then close drain plugs.

12.Remove the corrosion resistor (if equipped) and open valve.

13.Supply water until it flows over the water filler.

14.Drain the water inside reserve tank, clean the inside of the reserve tank, then fill with coolant/water mixture to between the full and low lines.

15.Stop the engine, wait for 3 minutes, add tap water until the water level reaches near the water filer port, then tighten the radiator cap.

Check Electric Heater (If equipped)

Before starting in cold weather (once a year), please contact your Komatsu distributor for inspection. Remove electric heater from the engine intake manifold and check for disconnections or dirt. When checking or installing the electric heater, replace the gasket with a new part.

DCA-400SPK — MAINTENANCE

Changing Oil

1.Make sure the oil is cool before changing.

2.Set a container directly under the drain plug of the oil pan. Loosen the drain plug slowly.

3.Check the drained oil for excessive metal particles or foreign material. Contact the distributor if there is metal particles or foreign material.

4.Using a filter wrench, turn filter cartridge to the left to remove it. If the filter cartridge is filled with a large amount of oil, wait 10 minutes or so before removing. Make sure there is no old gasket stuck on the filter holder.

5.Tighten drain plug. Clean the filter holder, fill the new filter cartridge with clean engine oil, coat the packing and thread of the new filter cartridge with engine oil, then install it to the filter holder. Tighten until the gasket surface contacts the seal surface of the filter holder, then tighten it a further 3/4 to 1 turn.

6.Add engine oil through oil filler until the oil level is between the H and L marks on the dipstick.

7.Run the engine at idling for a short time, then stop the engine. Recheck the oil level and fill as necessary.

Replacing fuel filter

1.Set the container under the filter cartridge to catch fuel.

2.Using a filter wrench, turn the filter cartridge to the left to remove it.

3.Clean the filter holder, fill the new filter cartridge with fuel, coat the packing surface of the filter cartridge with engine oil, then install the cartridge to the filter holder.

4.When installing, tighten until the packing surface contacts the seal surface of the filter holder then tighten a further 2/3 of a turn. If the filter cartridge is tighten too much, the packing will be damaged and will cause fuel leakage. Fuel leakage will occur if the filter cartridge is not tightened enough. Always tighten to the correct angle.

5.After replacing filter cartridge, loosen air bleed plug.

6.Loosen the knob of feed pump, and pump it up and down until no bubbles come our with the fuel from air bleed plug.

DCA-400SPK — PARTS AND OPERATION MANUAL — REV. #0 (06/19/01) — PAGE 55

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Multiquip DCA-400SPK operation manual Check Electric Heater If equipped, Changing Oil, Replacing fuel filter
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DCA-400SPK specifications

The Multiquip DCA-400SPK is a powerful and versatile diesel generator designed to meet the demands of both commercial and industrial applications. Known for its robust performance and reliable operation, this generator is engineered to provide consistent power in various environments, making it a go-to solution for contractors, events, and emergency backup needs.

One of the DCA-400SPK's standout features is its Cummins QSB6.7 engine, which provides 400 kVA (kilovolt-amps) of output. This engine is renowned for its fuel efficiency and durability, ensuring that users get the most out of their investment without frequent refueling. The generator is also equipped with a two-pole alternator that contributes to its ability to handle heavy loads without compromising performance.

Another notable characteristic of the DCA-400SPK is its advanced control panel. The generator comes with a fully digital control system that offers real-time monitoring and control of the generator’s functions. This includes features such as automatic voltage regulation (AVR), which ensures stable output voltage, and can be vital for protecting sensitive electronic equipment from power fluctuations.

In terms of sound attenuation, the DCA-400SPK is designed with a sound-attenuated canopy that significantly reduces noise levels during operation. This makes it suitable for use in residential areas or other noise-sensitive locations, allowing for operation without disturbing the surrounding community.

For ease of transport, the generator includes a sturdy frame and is equipped with forklift pockets and lifting hooks. This enhances its portability, making it easier to move from one job site to another. Additionally, the unit offers comprehensive connectivity options, allowing it to interface with remote monitoring systems, which can be essential for maintenance and operational oversight.

The Multiquip DCA-400SPK also features an environmentally friendly design, with a low oil shutdown feature and a robust fuel containment system to prevent spills. This not only ensures compliance with environmental regulations but also enhances the safety of operation.

Overall, the DCA-400SPK stands out as a reliable, efficient, and user-friendly generator that meets the stringent demands of the modern world, making it a preferred choice among professionals in various industries.
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