SETUP

CAUTION - Strainer

The strainer should be positioned so it will remain completely under water. Running the pump with the strainer above water for long periods can damage the pump.

CAUTION - Flammable Fluids

DO NOT pump flammable fluids, corrosive chemicals or fluids containing toxic substances. These fluids can create potentially dangerous health and environmental hazards. Contact local authorities for assistance.

Diaphragm pumps will handle fluids containing considerable solids (see

NOTE Table 1 for maximum solids diameter), however, if the mixture is too heavy to be pumped, water must be added until the mixture becomes sufficently fluid for pumping.

Connecting Rod Bearing Lubrication

1.Grease connecting rod bearing thru the access hole (Figure 8) every 25 hours of operation.

2.Use only premium lithium based grease, conforming to NLG1 Grade #2 consistency.

This pump uses a water-cooled

mechanical seal to prevent water

NOTE from seeping into the engine. The passage of water through the pump casing lubricates the seal and prevents it from overheating.

Gear Reduction Oil (Transmission)

1. Remove the transmission oil level plug (Figure 7). If oil begins to seep out as the plug is being removed, then it can be assumed that the transmission oil is at the proper operating level.

2.If oil does not seep out as the oil level plug is being removed, then remove the transmission oil fill plug and fill with SAE 80/90 EP (API GL-5) gear oil to the proper operating level. Transmission oil capacity is capacity is 22 ounces (651 ml).

Figure 8. Connecting Rod Bearing Lubrication Helpful Hints

The capacity of this diaphragm pump will vary greatly depending on the height of the suction lift and length of the discharge hose. A discharge hose which is too small, long or high will cause the following:

■Excessive bulging of diaphragm on the down stroke.

■Valves closing with a loud snap.

■Rough operation.

■Engine overloads and slow downs.

■Reduced efficiency.

Figure 7.Transmission Oil Level

MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 17

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Multiquip MQD2H manual Mechanical seal to prevent water
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MQD2H specifications

The Multiquip MQD2H is a versatile and robust diesel-powered generator designed to cater to a wide range of applications, making it a staple for construction sites, emergency backup, and outdoor events. Engineered with advanced technologies, this generator is built to deliver reliable power and withstand challenging environments.

At the heart of the MQD2H is a powerful, fuel-efficient diesel engine that ensures long operational hours with minimal downtime. This efficiency is crucial for projects requiring continuous power supply. Equipped with a large fuel tank, the MQD2H can operate for extended periods without the need for frequent refueling, enhancing productivity on the job site.

One of the standout features of the MQD2H is its robust construction. The generator is housed in a durable frame that protects it from physical damage and harsh weather conditions. Its compact design allows for easy transportation and maneuverability, making it ideal for various locations. Additionally, the generator is equipped with advanced soundproofing technology, reducing operational noise levels and making it suitable for use in noise-sensitive environments.

The MQD2H is designed with user convenience in mind. It features an intuitive control panel that provides easy access to vital operational information, allowing users to monitor the generator's performance at a glance. The control panel includes circuit breakers, start/stop switches, and hour meters, ensuring that operators have full control over the generator’s functionality.

Safety is also a priority with the Multiquip MQD2H. The generator incorporates automatic shutdown features for low oil pressure and high engine temperature, protecting the unit from potential damage. This built-in safety mechanism provides peace of mind for operators, knowing that the generator is safeguarded against operational hazards.

Furthermore, the MQD2H complies with emission regulations, making it an environmentally friendly choice among generators. The design includes technologies that minimize harmful emissions without compromising power output, adhering to industry standards and promoting cleaner operation.

In conclusion, the Multiquip MQD2H is a reliable, durable, and efficient generator ideal for a multitude of applications. With its powerful diesel engine, user-friendly controls, enhanced safety features, and commitment to environmental sustainability, it stands out as a top choice for professionals seeking dependable power solutions in demanding conditions.
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