
OPERATION AND PARTS MANUALRevision #6 (10/27/11)MODELSMQD2HMQD3HDIAPHRAGM PUMPS(Honda GX120K1QX2 Gasoline Engine)THIS MANUAL MUST ACCOMPANY THE EQUIPM
PAGE 10 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)Table 2. Specifications (Engine)EngineModel HONDA GX120K1QX2Ty peA
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 11MQ-D2H/D3H — DIMENSIONS (PUMP)snoisnemiD.3elbaTLEDOMAHTGNELBTHGIEH
PAGE 12 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)MQ-D2H/D3H — GENERAL INFORMATIONAPPLICATIONThe MQD2H and MQD3H dia
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 13Figure 2 shows a typical application using the MQD2H or MQD3H diap
PAGE 14 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)Figure 3. Engine Controls andComponentsINITIAL SERVICINGThe engin
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 15Figure 4. Engine Oil Dipstick (Removal)Figure 5. Engine Oil Dipsti
PAGE 16 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)Before Starting1. Read safety instructions at thebeginning of manu
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 17Gear Reduction Oil (Transmission)1. Remove the transmission oil l
PAGE 18 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)6. Grasp the starter grip (Figure 14) and slowly pull it out. Ther
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 19MQ-D2H/D3H —OPERATION8. Before the pump is placed into operation,
PAGE 2 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)PROPOSITION 65 WARNING
PAGE 20 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)To perform the pump vacuum test do the following:1. Start the engi
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 21Figure 21. Pump Vacuum TesterPressure reading may vary depending o
PAGE 22 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)Rotation of Suction and Discharge PortsIn some applications, it ma
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 23Seized PlungerIf the plunger arm has seized, perform the following
PAGE 24 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)Reference manufacturer enginemanual for specific servicinginstruct
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 25MaintenancePerform the engine maintenance procedures as indicated
PAGE 26 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)Pump StorageFor storage of the pump for over 30 days, the followin
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 27GNITOOHSELBUORTENIGNE.8ELBATMOTPMYS MELBORPELBISSOP NOITULOStratso
PAGE 28 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11))deunitnoC(GNITOOHSELBUORTENIGNE.8ELBATMOTPMYS MELBORPELBISSOP NOI
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 29)deunitnoC(GNITOOHSELBUORTPMUP.9ELBATMOTPMYSMELBORPELBISSOPNOITULO
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 3NOTES
PAGE 30 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)The following section explains the different symbols and remarks u
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 31NOTEPart number on this SuggestedSpare Parts List may super cede/r
PAGE 32 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)MQ-D2H/3H — NAMEPLATE AND DECALS ASSY.NAMEPLATE AND DECALS ASSY.
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 33MQ-D2H/3H — NAMEPLATE AND DECALS ASSY.NAMEPLATE AND DECALS ASSY.
PAGE 34 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)WATERBOX AND FLAP VALVE ASSY. (2-INCH)MQD2H — WATERBOX AND FLAP VA
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 35WATERBOX AND FLAP VALVE ASSY. (2-INCH)NO. PART NO. PART NAME QTY.
PAGE 36 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)PUMP ASSY. (2-INCH)MQD2H —PUMP ASSY.
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 37PUMP ASSY. (2-INCH)NO. PART NO. PART NAME QTY. REMARKS1 336019100
PAGE 38 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)HANDLE, ENGINE AND WHEEL ASSY. (2-INCH)MQD2H —HANDLE, ENGINE, AND
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 39HANDLE, ENGINE AND WHEEL ASSY. (2-INCH)NO. PART NO. PART NAME QTY.
PAGE 4 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)MQ-D2H/D3H GasolinePowered DiaphragmPumpsProposition 65 Warning ...
PAGE 40 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)WATERBOX AND FLAP VALVE ASSY. (3-INCH)MQD3H —WATERBOX AND FLAP VAL
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 41WATERBOX AND FLAP VALVE ASSY. (3-INCH)NO. PART NO. PART NAME QTY.
PAGE 42 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)PUMP ASSY. (3-INCH)NOTES:TORQUE TO 7-8 FT. LBS.1TORQUE TO 55-60 FT
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 43PUMP ASSY. (3-INCH)NO. PART NO. PART NAME QTY. REMARKS1 170400200
PAGE 44 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)MQ-D3H — HANDLE, ENGINE AND WHEEL ASSY. (3-INCH)HANDLE, ENGINE AN
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 45HANDLE, ENGINE AND WHEEL ASSY. (3-INCH)NO. PART NO. PART NAME QTY.
PAGE 46 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)AIR CLEANER ASSY.HONDA GX120K1QX2 ENGINE — AIR CLEANER ASSY.
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 47AIR CLEANER ASSY.NO. PART NO. PART NAME QTY. REMARKS1 16271ZE1000
PAGE 48 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)CAMSHAFT ASSY.HONDA GX120K1QX2 ENGINE — CAMSHAFT ASSY.
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 49CAMSHAFT ASSY.NO. PART NO. PART NAME QTY. REMARKS1 14100ZE0812 CAM
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 5www.multiquip.comOrdering parts has never been easier! Choose from
PAGE 50 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)CARBURETOR ASSY.HONDA GX120K1QX2 ENGINE — CARBURETOR ASSY.
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 51CARBURETOR ASSY.NO. PART NO. PART NAME QTY. REMARKS1*16010ZE1812 G
PAGE 52 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)CONTROL ASSY.HONDA GX120K1QX2 ENGINE — CONTROL ASSY.
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 53CONTROL ASSY.NO. PART NO. PART NAME QTY. REMARKS3 16500ZH7820 CONT
PAGE 54 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)CRANKCASE COVER ASSY.HONDA GX120K1QX2 ENGINE — CRANKCASE COVER ASS
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 55CRANKCASE COVER ASSY.NO. PART NO. PART NAME QTY. REMARKS1 11300ZE0
PAGE 56 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)CRANKSHAFT ASSY.HONDA GX120K1QX2 ENGINE — CRANKSHAFT ASSY.HON
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 57HONDA GX120K1QX2 ENGINE — CRANKSHAFT ASSY.CRANKSHAFT ASSY.NO.
PAGE 58 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)CYLINDER BARREL ASSY.HONDA GX120K1QX2 ENGINE — CYLINDER BARREL ASS
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 59CYLINDER BARREL ASSY.NO. PART NO. PART NAME QTY. REMARKS2 120A0ZH7
PAGE 6 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)Do not operate or service the equipment before reading the entire m
PAGE 60 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)CYLINDER HEAD ASSY.HONDA GX120K1QX2 ENGINE — CYLINDER HEAD ASSY
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 61HONDA GX120K1QX2 ENGINE — CYLINDER HEAD ASSY.CYLINDER HEAD ASSY.
PAGE 62 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)FAN COVER ASSY. HONDA GX120K1QX2 ENGINE — FAN COVER ASSY.HONDA
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 63HONDA GX120K1QX2 ENGINE — FAN COVER ASSY.FAN COVER ASSY.NO. PA
PAGE 64 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)FLYWHEEL ASSY.HONDA GX120K1QX2 ENGINE — FLYWHEEL ASSY.HONDA GX1
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 65FLYWHEEL ASSY.NO. PART NO. PART NAME QTY. REMARKS1 13331357000 KEY
PAGE 66 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)FUEL TANK ASSY.HONDA GX120K1QX2 ENGINE — FUEL TANK ASSY.HONDA
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 67FUEL TANK ASSY.NO. PART NO. PART NAME QTY. REMARKS1 16854ZH8000 RU
PAGE 68 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)IGNITION COIL ASSY.HONDA GX120K1QX2 ENGINE — IGNITION COIL ASS
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 69HONDA GX120K1QX2 ENGINE — IGNITION COIL ASSY.IGNITION COIL ASS
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 7GENERAL SAFETY CAUTION NEVER operate this equipment without prop
PAGE 70 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)MUFFLER ASSY.HONDA GX120K1QX2 ENGINE — MUFFLER ASSY.HONDA GX12
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 71HONDA GX120K1QX2 ENGINE — MUFFLER ASSY.MUFFLER ASSY.NO. PART N
PAGE 72 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)PISTON ASSY.HONDA GX120K1QX2 ENGINE — PISTON ASSY.
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 73PISTON ASSY.NO. PART NO. PART NAME QTY. REMARKS1 13010ZK7V01 RING
PAGE 74 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)RECOIL STARTER ASSY.HONDA GX120K1QX2 ENGINE — RECOIL STARTER ASSY.
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 75RECOIL STARTER ASSY.NO. PART NO. PART NAME QTY. REMARKS1 28400ZH80
PAGE 76 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)GASKET KIT ASSY.HONDA GX120K1QX2 ENGINE — GASKET KIT ASSY.HOND
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 77HONDA GX120K1QX2 ENGINE — GASKET KIT ASSY.GASKET KIT ASSY.NO.
PAGE 78 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)LABELS ASSY.HONDA GX120K1QX2 ENGINE — LABELS ASSY.
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 79LABELS ASSY.NO. PART NO. PART NAME QTY. REMARKS1 87521ZH7020 EMBLE
PAGE 8 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)SAFETY INFORMATIONPUMP SAFETY DANGER NEVER operate the equipment
PAGE 80 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)PAYMENT TERMSTerms of payment for parts are net 30 days.FREIGHT PO
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 81NOTES
OPERATION AND PARTS MANUALYour Local Dealer is:HERE’S HOW TO GET HELPPLEASE HAVE THE MODEL AND SERIALNUMBER ON-HAND WHEN CALLING© COPYRIGHT 2010, MULT
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 9SAFETY INFORMATIONPower Cord/Cable Safety DANGER NEVER let power
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