Multiquip MQD3H, MQD2H User Manual
OPERATION AND PARTS MANUAL
MODELS
DIAPHRAGM PUMPS
(Honda
MQD2H
MQD3H
GX120UT1QX2
Revision #7 (05/24/13)
To find the latest revision of this
publication, visit our website at:
www.multiquip.com
Gasoline Engine)
THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
PROPOSITION 65 WARNING
PAGE 2 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13)
NOTES
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13) — PAGE 3
TABLE OF CONTENTS
MQD2H/D3H Gasoline
Powered Diaphragm
Pumps
Proposition 65 Warning ............................................. 2
Table of Contents ...................................................... 4
Parts Ordering Procedures ....................................... 5
Safety Information .................................................. 6-9
Specifications ...........................................................10
Dimensions .............................................................. 11
General Information .................................................12
Components............................................................. 13
Basic Engine ............................................................14
Inspection .................................................................15
Set-up ................................................................ 16-17
Operation ........................................................... 18-19
Maintenance ...................................................... 20-25
Preparation for Long-Term Storage ......................... 26
Troubleshooting ................................................. 27-29
Explanation Of Code In Remarks Column ............... 30
Suggested Spare Parts ............................................ 31
HONDA GX120UT1QX2
Engine
Air Cleaner Assembly ......................................... 46-47
Camshaft Assembly ........................................... 48-49
Carburetor Assembly ......................................... 50-51
Control Assembly ............................................... 52-53
Crankcase Cover Assembly ............................... 54-55
Crankshaft Assembly ......................................... 56-57
Cylinder Barrel Assembly ................................... 58-59
Cylinder Head Assembly .................................... 60-61
Fan Cover Assembly .......................................... 62-63
Flywheel Assembly ............................................ 64-65
Fuel Tank Assembly ........................................... 66-67
Ignition Coil Assembly ........................................ 68-69
Muffler Assembly ............................................... 70-71
Piston Assembly ................................................. 72-73
Recoil Starter Assembly ..................................... 74-75
Gasket Kit Assembly .......................................... 76-77
Labels ................................................................ 78-79
Terms and Condition Of Sale
— Parts .................... 80
Component Drawings
Nameplate and Decals Assy. ............................. 32-33
Waterbox and Flap Valve Assy. (2-inch)............. 34-35
Pump Assy. (2-inch) ........................................... 36-37
Handle, Engine and Wheel Assy. (2-inch) .......... 38-39
Waterbox and Flat Valve Assy. (3-inch).............. 40-41
Pump Assy. (3-inch) ........................................... 42-43
Handle, Engine and Wheel Assy. (3-inch) .......... 44-45
NOTICE
Specification and part number are subject to
change without notice.
PAGE 4 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13)
r
PARTS ORDERING PROCEDURES
Ordering parts has never been easier!
Choose from three easy options:
January 1
Effective:
st
, 2006
Best Deal!
Order via Internet (Dealers Only):
Order parts on-line using Multiquip’s SmartEquip website!
■ View Parts Diagrams
■ Order Parts
■ Print Specification Information
Goto www.multiquip.com and click on
Order Par ts
Order via Fax (Dealers Only):
All customers are welcome to order parts via Fax.
Domestic (US) Customers dial:
1-800-6-PARTS-7 (800-672-7877)
Non-Dealer Customers:
Contact your local Multiquip Dealer for
parts or call 800-427-1244 for help in
locating a dealer near you.
to log in and save!
Order via Phone:
If you have an MQ Account, to obtain a Username
and Password, E-mail us at: parts@multiquip.
com.
To obtain an MQ Account, contact you
District Sales Manager for more information.
Use the internet and qualify for a 5% Discount
on Standard orders for all orders which include
complete part numbers.*
Fax your order in and qualify for a 2% Discount
on Standard orders for all orders which include
complete part numbers.*
Domestic (US) Dealers Call:
1-800-427-1244
International Customers should contact
their local Multiquip Representatives for
Parts Ordering information.
Note: Discounts Are Subject To Change
Note: Discounts Are Subject To Change
When ordering parts, please supply:
❒ Dealer Account Number
❒ Dealer Name and Address
❒ Shipping Address (if different than billing address)
❒ Return Fax Number
❒ Applicable Model Number
❒ Quantity, Part Number and Description of Each Part
NOTICE
All orders are treated as Standard Orders and will
ship the same day if received prior to 3PM PST.
❒ Specify Preferred Method of Shipment:
✓ UPS/Fed Ex ✓ DHL
■ Priority One ✓ Tr uck
■ Ground
■ Next Day
■ Second/Third Day
www.multiquip.com
WE ACCEPT ALL MAJOR CREDIT CARDS!
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13) — PAGE 5
SAFETY INFORMATION
Do not operate or service the equipment before reading
the entire manual. Safety precautions should be followed
at all times when operating this equipment.
Failure to read and understand the safety
messages and operating instructions could
result in injury to yourself and others.
SAFETY MESSAGES
The four safety messages shown below will inform you
about potential hazards that could injure you or others. The
safety messages specifically address the level of exposure
to the operator and are preceded by one of four words:
DANGER, WARNING, CAUTION or NOTICE.
SAFETY SYMBOLS
DANGER
Indicates a hazardous situation which, if not avoided,
WILL result in DEATH or SERIOUS INJURY.
WARNING
Potential hazards associated with the operation of this
equipment will be referenced with hazard symbols which
may appear throughout this manual in conjunction with
safety messages.
Indicates a hazardous situation which, if not avoided,
COULD result in DEATH or SERIOUS INJURY.
CAUTION
Indicates a hazardous situation which, if not avoided,
COULD result in MINOR or MODERATE INJURY.
NOTICE
Addresses practices not related to personal injury.
PAGE 6 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13)
SAFETY INFORMATION
GENERAL SAFETY
CAUTION
NEVER operate this equipment without proper protective
clothing, shatterproof glasses, respiratory protection,
hearing protection, steel-toed boots and other protective
devices required by the job or city and state regulations.
Avoid wearing jewelry or loose fitting clothes that may
snag on the controls or moving parts as this can cause
serious injury.
NEVER operate this equipment when not
feeling well due to fatigue, illness or when
under medication.
NEVER operate this equipment under the
influence of drugs or alcohol.
NOTICE
This equipment should only be operated by trained and
qualified personnel 18 years of age and older.
Whenever necessary, replace nameplate, operation and
safety decals when they become difficult read.
Manufacturer does not assume responsibility for any
accident due to equipment modifications. Unauthorized
equipment modification will void all warranties.
NEVER use accessories or attachments that are not
recommended by Multiquip for this equipment. Damage
to the equipment and/or injury to user may result.
ALWAYS know the location of the nearest
fire extinguisher.
ALWAYS know the location of the nearest
first aid kit.
ALWAYS know the location of the nearest phone or keep
a phone on the job site. Also, know the phone numbers
of the nearest ambulance, doctor and fire department.
This information will be invaluable in the case of an
emergency.
ALWAYS clear the work area of any debris, tools, etc.
that would constitute a hazard while the equipment is
in operation.
No one other than the operator is to be in the working
area when the equipment is in operation.
DO NOT use the equipment for any purpose other than
its intended purposes or applications.
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13) — PAGE 7
SAFETY INFORMATION
y
PUMP SAFETY
DANGER
NEVER operate the equipment in an explosive
atmosphere or near combustible materials. An
explosion or fire could result causing severe
bodily harm or even death.
WARNING
Accidental starting can cause severe injury
or death. ALWAYS place the ON/OFF
switch in the OFF position.
DO NOT place hands or fingers inside
pump when pump is running.
NEVER disconnect any emergency or
safety devices. These devices are intended for operator
safety. Disconnection of these devices can cause severe
injury, bodily harm or even death. Disconnection of any
of these devices will void all warranties.
CAUTION
DO NOT restrict the flow of the discharge hose as it may
cause overheating.
Be careful of discharge whipping under pressure.
NOTICE
NEVER operate pump on its side.
DO NOT allow up to freeze in water.
NEVER leave an open pump chamber unattended.
ALWAYS keep the machine in proper running condition.
DO NOT attempt to thaw-out a frozen pump by using
a torch or other source of flame. Application of heat in
this manner may heat the oil in the seal cavity above the
critical point, causing pump damage.
DO NOT pump water greater than 104º F.
DO NOT pump liquids containing acid or alkali.
ALWAYS check strainer before pumping. Make sure
strainer is not clogged. Remove any large objects, dirt
or debris from the strainer to prevent clogging.
ALWAYS use a large basket strainer when pumping
water that contains large debris.
ALWAYS flush pump (clean) after use when pumping
water concentrated with heavy debris. It is very important
to always flush the pump before turning it off to prevent
clogging.
Fix damage to machine and replace any broken parts
immediately.
ALWAYS store equipment properly when it is not being
used. Equipment should be stored in a clean, dry location
out of the reach of children and unauthorized personnel.
NEVER lubricate components or attempt service on a
running machine.
ALWAYS allow the machine a proper amount of time to
cool before servicing.
Keep machine in proper running condition.
LIFTING SAFETY
CAUTION
When raising or lowering of the pump is required, always
attach an adequate rope or lifting device to the correct
lifting point (handle) on the pump.
NOTICE
DO NOT lift machine to unnecessary heights.
NEVER lift the equipment while the engine is running.
TRANSPORTING SAFETY
NOTICE
ALWAYS shutdown pump before transporting.
ALWAYS tie down equipment during transport b
securing the equipment with rope.
ENVIRONMENTAL SAFETY
NOTICE
Dispose of hazardous waste properly.
Examples of potentially hazardous waste
are used motor oil, fuel and fuel filters.
DO NOT use food or plastic containers to dispose of
hazardous waste.
DO NOT pour waste, oil or fuel directly onto the ground,
down a drain or into any water source.
PAGE 8 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13)
NOTES
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13) — PAGE 9
SPECIFICATIONS
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Table 2. Specifications (Engine)
Model HONDA GX120UT1QX2
Type
Air-cooled 4 stroke, Single Cylinder, OHV,
Horizontal Shaft Gasoline Engine
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Bore X Stroke 2.4 in. x 1.7 in. (60 mm x 42 mm)
Displacement 119 cc (7.2 cu-in)
Max Output 4.0 H.P./2,750 R.P.M.
Fuel Tank Capacity 0.66 US gal. (2.5 liters)
Fuel Unleaded Automobile Gasoline
Lube Oil Capacity .60 liters (0.63 qts)
Speed Control Method Centrifugal Fly-weight Type
Starting Method Recoil Start
Dimension (L x W x H) 11.7 x 13.4 x 12.5 in. (297 x 341 x 318 mm)
Dry Net Weight 28.7 lbs (13 Kg.)
PAGE 10 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13)
MQ-D2H/D3H — DIMENSIONS (PUMP)
DIMENSIONS
Figure 1. MQD2H/D3H Pump Dimensions
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MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13) — PAGE 11
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MQ-D2H/D3H — GENERAL INFORMATION
GENERAL INFORMATION
APPLICATION
The
MQD2H
and
MQD3H diaphragm
pumps are designed to
be used for de-watering applications. The suction and discharge
ports on the
MQD2H
use a 2-inch diameter opening, which allows
the pump to pump at rate of approximately 3,000 gallons/hour
(gph) or 11,340 liters/hour (lph). The suction and discharge ports
on the
MQD3H
use a 3-inch diameter opening, which allows the
Elevation
Higher elevations will effect the performance of the pump. Due to
less atmospheric pressure at higher altitudes, pumps DO NOT
have the priming ability that they have at sea level. This is due to
the “thinner air” or lack of oxygen at higher altitudes.
A general rule of thumb is that for every 1,000 feet of elevation
above sea level a pump will lose one foot of priming ability.
pump to pump at rate of approximately 5,400 gallons/hour (gph)
or 20,456 liters/hour (lph).
For example, in Flagstaff, Arizona where the elevation is
approximately 7,000 feet, the pump would have a suction lift of
Diaphragm pumps use a positive displacement design rather
than centrifugal force to move water through the casing. This
only 18 feet rather than the 25 feet at sea level. Table 3 shows
suction lift at various elevations.
means the pump will deliver a specific amount of flow per stroke,
revolution or cycle. These pumps are commonly referred to as
mud hogs, mud hens and mud suckers. Their names reflect their
popularity for use in applications where shallow depths and slurry
water render centrifugal pumps ineffective.
Power Plant
These diaphragm pumps are powered by a 4.0 horsepower air
cooled, 4-stroke, single cylinder
that incorporates a low “
HONDA GX120
Oil Alert Feature
” . The drive shaft of the
gasoline engine
000,6)301.2(09.6)961.3(4.01)602.4(8.31)372.5(3.71
engine is coupled to an offset connecting rod that is coupled to a
flexible diaphragm. The connecting rod alternately raises
(expands) and lowers (contracts) the diaphragm at a rate of 60
cycles per minute at maximum engine RPM (2,750).
Oil Alert Feature
In the event of
low oil
or
no oil
, the HONDA GX120 engine has
Table 4 shows percentage drops in performance as elevation
increases.
a built-in oil alarm engine shut-down feature. In the event the oil
level is low the engine will automatically shut-down.
Suction Lift
This pump is intended to be used for dewatering applications
and is capable of suction lifts up to 25 feet at sea level. For
optimal suction lift performance keep the suction hose or line as
short as possible. In general always place the pump as close to
the water as possible.
Pump Support
The pump should always be placed on
solid stationary ground
in a level position.
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PAGE 12 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13)
MQ-D2H/D3H — PUMP 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 11/2 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.
COMPONENTS
NOTE
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 – To help
facilitate faster priming operations, fill chamber with clean
water and secure priming plug.
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.
Contact your nearest Multiquip
dealer for quick disconnect hoses
and fittings.
Figure 2. MQ-D2H/D3H Pump Application
6. Suction Port – Connect either a 2-inch or 3-inch inlet
7. Suction Hose – Connect a flexible rubber hose to the
8. Strainer – Always attach a strainer to bottom side of the
9. Transmission Oil Fill Plug – Remove this plug to add
10. Connecting Rod Grease Access Hole – Grease
hose to this port depending on pump model.
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.
suction hose to prevent large objects and debris from
entering the pump. Strainer should be positioned so that it
will remain completely under water.
SAE 80/90 EP (API GL-5) gear oil to the transmission.
Transmission oil capacity is 22 ounces (651 ml.).
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. #7 (05/24/13) — PAGE 13
Figure 3. Engine Controls and
Components
BASIC ENGINE
INITIAL SERVICING
The engine (Figure 3) must be checked for proper lubrication and
filled with fuel prior to operation. Refer to the Honda manufacturers
engine manual for instructions and details for operation and
servicing.
1. Fuel Filler Cap – Remove this cap to add unleaded
gasoline to the fuel tank. Make sure cap is tightened
securely. DO NOT over fill.
Explosive FuelExplosive Fuel
Explosive Fuel
Explosive FuelExplosive Fuel
DANGER - Explosive Fuel
Adding fuel to the tank should be done only
when the engine is stopped and has had an
opportunity to cool down. In the event of a fuel
spill, DO NOT attempt to start the engine until
the fuel residue has been completely wiped up,
and the area surrounding the engine is dry.
2. Throttle Lever – Used to adjust engine RPM speed (lever
SLOW
advanced forward
FAST
).
3. Engine ON/OFF Switch – ON position permits engine
starting, OFF position stops engine operations.
4. Recoil Starter (pull rope) – Manual-starting method. Pull
the starter grip until resistance is felt, then pull briskly and
smoothly.
, lever back toward operator
6. Choke Lever – Used in the starting of a cold engine, or in
cold weather conditions. The choke enriches the fuel
mixture.
7. Air Cleaner – Prevents dirt and other debris from entering
the fuel system. Remove wing-nut on top of air filter
cannister to gain access to filter element.
NOTE
8. Spark Plug – Provides spark to the ignition system. Set
spark plug gap to 0.6 - 0.7 mm (0.028 - 0.031 inch) Clean
spark plug once a week.
9. Muffler – Used to reduce noise and emissions.
CAUTION - Burn Hazard
Engine components can generate extreme
heat. To prevent burns, DO NOT touch these
areas while the engine is running or
immediately after operating. NEVER operate
the engine with the muffler removed.
5. Fuel Valve Lever – OPEN to let fuel flow, CLOSE to stop
the flow of fuel.
10. Fuel Tank – Holds unleaded gasoline. For additional
information refer to engine owner's manual.
Operating the engine without an air
filter, with a damaged air filter, or a
filter in need of replacement will
allow dirt to enter the engine,
causing rapid engine wear.
PAGE 14 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13)
INSPECTION
CAUTION - Read Manual
Please read the entire maintenance section
in this manual before servicing the pump. In
addition for operator safety, please read all
safey messages at the begining of the
manual
Inspection
1. Clean the pump, removing dirt and dust, particularly the
engine cooling air inlet, carburetor and air cleaner.
2. Check the air filter for dirt and dust. If air filter is dirty, replace
air filter with a new one as required.
3. Check carburetor for external dirt and dust. Clean with dry
compressed air.
4. Check fastening nuts and bolts for tightness.
Engine Oil Check
1. To check the engine oil level, place the pump on secure
level ground with the engine stopped.
2. Remove the filler dipstick from the engine oil filler hole
(Figure 4) and wipe clean.
DIPSTICK
Motor fuels are highly flammable and can be
dangerous if mishandled. DO NOT smoke
while refueling.
should be done only when the engine is
stopped and has had an opportunity to cool
down. DO NOT attempt to refuel the pump if the engine is
hot! or running
immediately.
fuel residue has been completely wiped up, and the area
surrounding the engine is dry.
UPPER LIMIT
LOWER LIMIT
Figure 5. Engine Oil Dipstick (Oil Level)
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DANGER - Explosive Fuel
Adding fuel to the tank
In the event of any spilled fuel, wipe up
DO NOT attempt to start the engine until the
Fuel Check
Figure 4. Engine Oil Dipstick (Removal)
3. Insert and remove the dipstick without screwing it into the filler
neck. Check the oil level shown on the dipstick.
4. If the oil level is low (Figure 5), fill to the edge of the oil filler
hole with the recommended oil type (Table 5). Maximum oil
capacity is .63 quarts (.60 liters).
1. Remove the gasoline cap located on top of fuel tank.
2. Visually inspect to see if the fuel level is low. If fuel is low,
replenish with unleaded fuel.
3. When refueling, be sure to use a strainer for filtration. DO
NOT top-off fuel. Wipe up any spilled fuel
immediately!
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13) — PAGE 15
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