Multiquip MQD2H manual Rotation of Suction and Discharge Ports

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MAINTENANCE

Rotation of Suction and Discharge Ports

In some applications, it may be preferable to have suction/ discharge ports rotated 90° (Figure 22) to be in-line with the pump wheels. Perform the following procedure to rotate ports:

1.Remove the four hex head cap screws, hex nuts, flat washers and lock washers from the pump base.

2.Push pump well downwards to separate from pump base.

3.Rotate pump well 90° clockwise so that driver is positioned over top of discharge plate.

4.Align pump well, pump base, and diaphragm with each other.Once all components have been properly aligned, reinstall the four hex head cap screws, hex nuts, flat and lock washers and tighten securely.

Figure 22. Suction/Discharge Port Rotation

Clearing a Jam-Up

If large solids or an accumulation of sand or other sediment becomes lodged in the pump well, preventing the plunger arm from making a full stroke; the pump may stall, the crank could slip on the output shaft, or the plunger arm could incur extreme damage and shear.

If a jam-up does occur, the pump should be thoroughly cleaned as described on the “Pump Stalls” section.

CAUTION - Stalled or Stopped Pump

If pump has stopped or stalled for any unknown reason, clean out pump cavity (well) thoroughly. Failure to comply could result in damage to plunger arm or other internal pump components.

Stalled Pump

If pump has stalled for any unknown reason perform the following:

1.Remove handle from pump. See Figure 6.

2.Remove the four hex head cap screws, hex nuts, flat washers and lock washers from the pump base.

3.Push pump well downwards (Figure 23) to separate from pump base.

4.Clean and remove all dirt and debris from pump well.

5.Align pump well, pump base, and diaphragm with each other. Once all components have been properly aligned, reinstall the four hex head cap screws, hex nuts, flat and lock washers and tighten securely.

Figure 23. PumpWell (Clean-out)

WARNING - Lock Screw Torqueing

Pump jamming with an over-torqued lock screw (plunger arm) may cause internal damage. Under torqueing may allow the output shaft to spin and wear parts prematurely causing replacement.

PAGE 22 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)

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Contents Models MQD2H MQD3H Proposition 65 Warning Page MQ-D2H/D3H Gasoline Powered Diaphragm Pumps Table of ContentsParts Ordering Procedures Ordering parts has never been easierSafety Information Safety MessagesGeneral Safety Pump Safety Lifting Safety Specifications Pump SpecificationsMQ-D2H DimensionsMQ-D3H General Information ApplicationComponents Contact your nearest MultiquipBasic Engine Initial ServicingInspection InspectionSetup Handle InstallationMechanical seal to prevent water Operation Starting the Engine Honda engineNormal Shutdown Maintenance Pump Vacuum TestAltitude. See Tables 4 Rotation of Suction and Discharge Ports Seized Plunger Engine Maintenance Schedule Daily Preparation for LONG-TERM Storage Pump StorageTroubleshooting Engine TroubleshootingEngine Troubleshooting Pump Troubleshooting Explanation of Code in Remarks Column Xxxxx only Not Used onQty Description Name Plate and Decals Assy Nameplate and Decals AssyDECAL, Grease Monthly DECAL, MQ LogoMQD2H Waterbox and Flap Valve Assy Waterbox and Flap Valve Assy -INCHPrimimg Plug Gasket Suction Priming ChamberPriming Plug Flapper Valve AssyMQD2H -PUMP Assy Pump Assy -INCHCrank Internal Retaining Ring 1-1/2Plunger ARM OIL SealHANDLE, Engine and Wheel Assy -INCH MQD2H -HANDLE, ENGINE, and Wheel Assy MQD3H -WATERBOX and Flap Valve Assy 212300001 MQD3H Pump Assy Pump Assy -INCH170400200 MQD3H HANDLE, ENGINE, and Wheel Assy MQD3H HANDLE, ENGINE, and Wheel Assy Engine Mount TBD BoltHonda GX120K1QX2 Engine AIR Cleaner Assy AIR Cleaner AssyCollar B, AIR Cleaner GROMMET, AIR CleanerCOLLAR, AIR Cleaner GASKET, ElbowHonda GX120K1QX2 Engine Camshaft Assy Camshaft AssyARM, Valve Rocker SPRING, Weight ReturnROD, Push LIFTER, ValveHonda GX120K1QX2 Engine Carburetor Assy Carburetor AssyValve SET, Float PLATE, Lever SettingGasket SET Float SETHonda GX120K1QX2 Engine Control Assy Control AssySPRING, Governor ARM, GovernorROD, Governor SPRING, Throttle ReturnHonda GX120K1QX2 Engine Crankcase Cover Assy Crankcase Cover AssyBEARING, Radial Ball GASKET, Case CoverGASKET, OIL Filler CAP PIN A, DowelHonda GX120K1QX2 Engine Crankshaft Assy Crankshaft AssyCRANKSHAFT, H-TYPE Honda GX120K1QX2 Engine Cylinder Barrel Assy Cylinder Barrel AssySLIDER, Governor WEIGHT, GovernorPIN, Governor Weight SHAFT, Governor ARMHonda GX120K1QX2 Engine Cylinder Head Assy Cylinder Head AssyGASKET, Cylinder Head GUIDE, Valve OS OptionalCLIP, Valve Guide COVER, HeadHonda GX120K1QX2 Engine FAN Cover Assy FAN Cover AssyCOVER, FAN *NH1* Black GROMMET, Adjusting CoverWIRE, Stop Switch 370MM PLATE, Side OIL AlertHonda GX120K1QX2 Engine Flywheel Assy Flywheel AssyFlywheel FAN, CoolingPULLEY, Starter NUT, Special 14MMHonda GX120K1QX2 Engine Fuel Tank Assy Fuel Tank AssyTANK, Fuel *NH1* Black RUBBER, Supporter 107MMJOINT, Fuel Tank GASKET, Fuel Filler CAPHonda GX120K1QX2 Engine Ignition Coil Assy Ignition Coil AssyCoil ASSEMBLY, Ignition Honda GX120K1QX2 Engine Muffler Assy Muffler AssyGASKET, Muffler MufflerPROTECTOR, Muffler SCREW, TappingHonda GX120K1QX2 Engine Piston Assy Piston AssyPISTON, Standard BOLT, Connecting RODRing SET, Piston Standard PISTON, OSHonda GX120K1QX2 Engine Recoil Starter Assy Recoil Starter AssyRATCHET, Starter SCREW, SettingREEL, Recoil Starter GUIDE, RatchetHonda GX120K1QX2 Engine Gasket KIT Assy Gasket KIT Assy06111ZH7405 Honda GX120K1QX2 Engine Labels Assy Labels AssyMARK, Choke EmblemLABEL, Caution MARK, OIL Alert ETerms and Condition of Sale Parts Freight PolicyPage HERE’S HOW to GET Help

MQD2H specifications

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