Revision #6 10/27/11
OPERATION AND PARTS MANUAL
MODELS MQD2H MQD3H
DIAPHRAGM PUMPS
PROPOSITION 65 WARNING
Page
Component Drawings
TABLE OF CONTENTS
MQ-D2H/D3HGasoline Powered Diaphragm Pumps
HONDAGX120K1QX2 Engine
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Symbol
SAFETY INFORMATION
SAFETY MESSAGES
SAFETY SYMBOLS
SAFETY INFORMATION
GENERAL SAFETY
fire extinguisher
first aid kit
SAFETY INFORMATION
PUMP SAFETY
ELECTRICAL SAFETY
NEVER disconnect any emergency or
TRANSPORTING SAFETY
Power Cord/Cable Safety
Grounding Safety
LIFTING SAFETY
Dry Net Weight
Table 1. Specifications Pump
Table 2. Specifications Engine
SPECIFICATIONS
DIMENSIONS
Table 3. Dimensions
MODEL
Table 5. Performance Loss at Various Elevations
GENERAL INFORMATION
Power Plant
Oil Alert Feature
Figure 2. MQ-D2H/D3HPump Application
COMPONENTS
used in general de-wateringapplications. Typical
Figure 3. Engine Controls and Components
BASIC ENGINE
DANGER - Explosive Fuel
CAUTION - Burn Hazard
DANGER - Explosive Fuel
INSPECTION
CAUTION - Read Manual
Table 6. Oil Type
WARNING - Fill Cap
SETUP
Handle Installation
CAUTION - General Safety Precautions
SETUP
CAUTION - Strainer
CAUTION - Flammable Fluids
mechanical seal to prevent water
Starting the Engine HONDA engine
OPERATION
Figure 13. Engine ON/OFF Switch ON Position
CAUTION - Read Manual
Figure 16. Throttle Lever Run
Figure 18. Engine ON/OFF Switch OFF
OPERATION
Figure 15. Choke Lever Open
Pump Vacuum Test
MAINTENANCE
FlapperValve Replacement
Connecting Rod Bearing Lubrication
altitude. See Tables 4 and
MAINTENANCE
Figure 21. Pump Vacuum Tester
Stalled Pump
Rotation of Suction and Discharge Ports
Clearing a Jam-Up
CAUTION - Stalled or Stopped Pump
Seized Plunger
Diaphragm Replacement
MAINTENANCE
1Service more frequently when used in DUSTY areas
MAINTENANCE
Table 7. Engine Maintenance Schedule
Engine Maintenance
ENGINE AIRCLEANER
DANGER - Combustion Fire , Explosion
MAINTENANCE
Maintenance
Pump Storage
PREPARATION FOR LONG-TERMSTORAGE
POSSIBLE PROBLEM
TROUBLESHOOTING
TABLE 8. ENGINE TROUBLESHOOTING
SYMPTOM
SYMPTOM
TABLE 8. ENGINE TROUBLESHOOTING Continued
TROUBLESHOOTING
TABLE 9. PUMP TROUBLESHOOTING
POSSIBLE PROBLEM
TROUBLESHOOTING
TABLE 9. PUMP TROUBLESHOOTING Continued
SYMPTOM
PART NO. Column
EXPLANATION OF CODE IN REMARKS COLUMN
SAMPLE PARTS LIST
NO. Column
Description
SUGGESTED SPARE PARTS
MQ-D2H/D3HDIAPHRAGM PUMP 1TO 3 UNITS WITH
HONDA GX120K1QX2 ENGINE
NAMEPLATE AND DECALS ASSY
NAME PLATE AND DECALS ASSY
REMARKS
PART NAME
NAME PLATE AND DECALS ASSY
WATERBOX AND FLAP VALVE ASSY. 2-INCH
MQD2H - WATERBOX AND FLAP VALVE ASSY
MQD2H - WATERBOX AND FLAP VALVE ASSY
QTY. REMARKS
PART NAME
PUMP ASSY. 2-INCH
MQD2H -PUMPASSY
QTY. REMARKS
MQD2H -PUMPASSY
PUMP ASSY. 2-INCH
PART NAME
MQD2H -HANDLE,ENGINE, AND WHEEL ASSY
HANDLE, ENGINE AND WHEEL ASSY. 2-INCH
335410800
MQD2H -HANDLE,ENGINE, AND WHEEL ASSY
PART NAME
REMARKS
WATERBOX AND FLAP VALVE ASSY. 3-INCH
MQD3H -WATERBOXAND FLAP VALVE ASSY
QTY. REMARKS
MQD3H -WATERBOXAND FLAP VALVE ASSY
WATERBOX AND FLAP VALVE ASSY. 3-INCH
PART NAME
28 27
MQD3H - PUMP ASSY
REMARKS
MQD3H - PUMP ASSY
PUMP ASSY. 3-INCH
PART NAME
HANDLE, ENGINE AND WHEEL ASSY. 3-INCH
7 6 1 2
MQD3H - HANDLE, ENGINE, AND WHEEL ASSY
PART NAME
MQD3H - HANDLE, ENGINE, AND WHEEL ASSY
REMARKS
AIR CLEANER ASSY
HONDA GX120K1QX2 ENGINE - AIR CLEANER ASSY
REMARKS
HONDA GX120K1QX2 ENGINE - AIR CLEANER ASSY
AIR CLEANER ASSY
PART NAME
CAMSHAFT ASSY
HONDA GX120K1QX2 ENGINE - CAMSHAFT ASSY
REMARKS
HONDA GX120K1QX2 ENGINE - CAMSHAFT ASSY
CAMSHAFT ASSY
PART NAME
CARBURETOR ASSY
HONDA GX120K1QX2 ENGINE - CARBURETOR ASSY
REMARKS
HONDA GX120K1QX2 ENGINE - CARBURETOR ASSY
CARBURETOR ASSY
PART NAME
CONTROL ASSY
HONDA GX120K1QX2 ENGINE - CONTROL ASSY
REMARKS
HONDA GX120K1QX2 ENGINE - CONTROL ASSY
CONTROL ASSY
PART NAME
CRANKCASE COVER ASSY
HONDA GX120K1QX2 ENGINE - CRANKCASE COVER ASSY
REMARKS
HONDA GX120K1QX2 ENGINE - CRANKCASE COVER ASSY
CRANKCASE COVER ASSY
PART NAME
CRANKSHAFT ASSY
HONDA GX120K1QX2 ENGINE - CRANKSHAFT ASSY
13310ZE0601
HONDA GX120K1QX2 ENGINE - CRANKSHAFT ASSY
CRANKSHAFT ASSY
PART NAME
CYLINDER BARREL ASSY
HONDA GX120K1QX2 ENGINE - CYLINDER BARREL ASSY
120A0ZH7810
HONDA GX120K1QX2 ENGINE - CYLINDER BARREL ASSY
PART NAME
QTY. REMARKS
CYLINDER HEAD ASSY
HONDA GX120K1QX2 ENGINE - CYLINDER HEAD ASSY
12210ZH7000
HONDA GX120K1QX2 ENGINE - CYLINDER HEAD ASSY
PART NAME
REMARKS
FAN COVER ASSY
HONDA GX120K1QX2 ENGINE - FAN COVER ASSY
FAN COVER ASSY
HONDA GX120K1QX2 ENGINE - FAN COVER ASSY
PART NAME
FLYWHEEL ASSY
HONDA GX120K1QX2 ENGINE - FLYWHEEL ASSY
FLYWHEEL ASSY
HONDA GX120K1QX2 ENGINE - FLYWHEEL ASSY
PART NAME
FUEL TANK ASSY
HONDA GX120K1QX2 ENGINE - FUEL TANK ASSY
REMARKS
HONDA GX120K1QX2 ENGINE - FUEL TANK ASSY
FUEL TANK ASSY
PART NAME
IGNITION COIL ASSY
HONDA GX120K1QX2 ENGINE - IGNITION COIL ASSY
REMARKS
CAP ASSEMBLY, NOISE SUPPRESSOR
HONDA GX120K1QX2 ENGINE - IGNITION COIL ASSY
PART NAME
MUFFLER ASSY
HONDA GX120K1QX2 ENGINE - MUFFLER ASSY
MUFFLER ASSY
HONDA GX120K1QX2 ENGINE - MUFFLER ASSY
PART NAME
PISTON ASSY
HONDA GX120K1QX2 ENGINE - PISTON ASSY
PISTON ASSY
HONDA GX120K1QX2 ENGINE - PISTON ASSY
PART NAME
RECOIL STARTER ASSY
HONDA GX120K1QX2 ENGINE - RECOIL STARTER ASSY
28400ZH8013ZB
HONDA GX120K1QX2 ENGINE - RECOIL STARTER ASSY
PART NAME
REMARKS
GASKET KIT ASSY
HONDA GX120K1QX2 ENGINE - GASKET KIT ASSY
REMARKS
HONDA GX120K1QX2 ENGINE - GASKET KIT ASSY
GASKET KIT ASSY
PART NAME
LABELS ASSY
HONDA GX120K1QX2 ENGINE - LABELS ASSY
LABELS ASSY
HONDA GX120K1QX2 ENGINE - LABELS ASSY
PART NAME
FREIGHT POLICY
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