Multiquip MQD2H manual Components, MQ-D2H/D3HPump Application

COMPONENTS

Figure 2 shows a typical application using the MQD2H or MQD3H diaphragm pump. Please note that this pump is intended for the removal of clean water and water containing some debris and solids. Maximum size of solids for the MQD2H should not exceed 1- 1/2 inches (38.1 mm) in diameter, and maximum size of solids for the MQD3H should not exceed 1-5/8 inches (41.275) in diameter. DO NOT set strainer on bottom of water bed. Placing the strainer above the water bed will prevent the pump from drawing in excessive amounts of sand and foreign debris.

Contact your nearest Multiquip

NOTEdealer for quick disconnect hoses and fittings.

Figure 2. MQ-D2H/D3H Pump Application

1.	Pump – The Multiquip Models MQD2H and MQD3H are
	2-inch and 3-inch diaphragm pumps respectively and are
	used in general de-watering applications. Typical
	dewatering applications consist of cleaning out cesspools
	and septic tanks, draining slow seepage from small
	excavations, trenches and construction sites, or pumping
	out industrial waste.
2.	Priming Plug/Suction Priming Chamber – Fill with clean
	water to assist with faster priming times.
3.	Discharge Port – Connect either a 2-inch or 3-inch
	discharge hose to this port depending on pump model.
4.	NPT Connection – Used to secure the hose to the inlet
	and outlet ports on the pump.
5.	Discharge Hose – Connect a flexible rubber hose to the
	discharge port on the pump. Make sure that the hose lays
	flat and is not kinked. Use only recommended type discharge
	hose. Contact Multiquip parts department for ordering
	information.

6. Suction Port – Connect either a 2-inch or 3-inch inlet hose to this port depending on pump model.

7. Suction Hose – Connect a flexible rubber hose to the suction port on the pump. Make sure that the hose lays flat and is not kinked. Use only recommended type suction hose. Contact Multiquip parts department for ordering information.

8. Strainer – Always attach a strainer to bottom side of the suction hose to prevent large objects and debris from entering the pump. Strainer should be positioned so that it will remain completely under water.

9. Transmission Oil Fill Plug – Remove this plug to add SAE 80/90 EP (API GL-5) gear oil to the transmission. Transmission oil capacity is 22 ounces (651 ml.).

10. Connecting Rod Grease Access Hole – Grease connecting rod bearing through this access hole. Grease connecting rod bearing every 25 hours of operation.

MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 13