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)
Page 5
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
Page 6
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)
Page 7
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
Page 8
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)
Page 9
NOTES
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13) — PAGE 9
Dimension (L x W x H)11.7 x 13.4 x 12.5 in. (297 x 341 x 318 mm)
Dry Net Weight28.7 lbs (13 Kg.)
PAGE 10 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13)
Page 11
MQ-D2H/D3H — DIMENSIONS (PUMP)
DIMENSIONS
Figure 1. MQD2H/D3H Pump Dimensions
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MQD2H
MQD3H
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13) — PAGE 11
H2D-QM
H3D-QM
A
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C
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Page 12
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.
connection should always be checked for tightness and leaks. A
small suction leak in the hose or fittings could prevent the pump
)840,3(000,01%88%87
from priming.
PAGE 12 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13)
Page 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
Page 14
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
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)
Page 15
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
Page 16
SETUP
Handle Installation
CAUTION - Handle Mounting
Failure to follow instructions and properly install handle,
mounting screws with washers, and torque mounting
screws, will result in damage or premature failure to
Before Starting
1.Read safety instructions at the
beginning of manual.
2.Place pump as near to water as
possible, on a firm flat, level surface.
gearbox, base or other pump components.
WARNING - Fill Cap
The MQD2H/D3H diaphragm pumps are completely
assembled except for the steering handle. Attach the steering
handle to the pump base as referenced below:
DO NOT open
be under pressure.
1.Remove the two front 1/2-13 hex screws fastening gearbox
mounting feet to base as shown in Figure 6.
2.Place handle onto gearbox mounting feet. Align handle
mounting holes with front holes on gearbox feet.
3.Install 1/2" flat washers onto 1/2-13 X 2-1/4 hex screws.
4.Insert hex screws through handle and gearbox foot, into
tapped holes of base.
5.Hand tighten both hex screws.
6.Torque both hex screws to 35 ft-lb.
Hoses and Clamps
1.Check that all hoses are
Make certain suction hose (Figure 2) does not have any air
leakage. Use teflon tape or pipe dope on NPT threads.
2.Remember suction hoses must be
collapse when the pump is in operation.
3.Check that
Place hose so that it lays as straight as it is possible on the
ground. Remove any twists or sharp bends from hose which
may block the flow of water.
fill cap
the
discharge
if pump is hot! Water inside may
securely
hose (Figure 2) is not restricted.
attached to the pump.
rigid
enough not to
HANDLE
PUMP BASE
Figure 6. Handle Installation
GEAR
BOX
BOLT
WASHER
Suction and discharge hoses are
NOTE
available from Multiquip. Contact
your nearest dealer for more
information.
4.The discharge hose is usually a
hose, however if a thin-walled discharge hose is not available, a rigid suction hose can be substituted in its place.
5.Make sure the
securely attached to the water end of the suction hose. The
strainer is designed to protect the pump by preventing large
objects from being pulled into the pump.
suction strainer
collapsible
(Figure 2) is clean and
(thin-walled)
CAUTION - Transmission Fluid
Transmission fluid needs to be added prior to operation.
PAGE 16 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13)
Page 17
SETUP
CAUTION - Strainer
The strainer should be positioned so it will remain completely
under water
water for long periods can damage the pump.
. Running the pump with the strainer above
CAUTION - Flammable Fluids
DO NOT pump flammable fluids, corrosive chemicals or fluids
containing toxic substances. These fluids can create potentially
dangerous health and environmental hazards. Contact local
authorities for assistance.
Gear Reduction Oil (Transmission)
1.Remove the transmission oil level plug (Figure 7). If oil
begins to seep out as the plug is being removed, then it
can be assumed that the transmission oil is at the proper
operating level.
2.If oil does not seep out as the oil level plug is being removed,
then remove the transmission oil fill plug and fill with SAE
EP (API GL-5) gear oil
80/90
Transmission oil capacity is capacity is 22 ounces (651 ml).
to the proper operating level.
NOTE
Connecting Rod Bearing Lubrication
1.Grease connecting rod bearing thru the access
hole (Figure 8) every 25 hours of operation.
2.Use only
NLG1 Grade #2 consistency.
Diaphragm pumps will handle fluids
containing considerable solids (see
Table 1 for maximum solids diameter),
however, if the mixture is too heavy to
be pumped, water must be added until
the mixture becomes sufficently fluid for
pumping.
premium lithium based grease
, conforming to
Figure 8. Connecting Rod Bearing Lubrication
Helpful Hints
The capacity of this diaphragm pump will vary greatly depending on
the height of the suction lift and length of the discharge hose. A
discharge hose which is too small, long or high will cause the
following:
■
Excessive bulging of diaphragm on the down stroke.
■
Valves closing with a loud snap.
■
Rough operation.
Figure 7. Transmission Oil Level
■
Engine overloads and slow downs.
■
Reduced efficiency.
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13) — PAGE 17
Page 18
CAUTION - Read Manual
DO NOT attempt to operate the pump until the
Safety, General Information and Inspection
sections of this manual have been
thoroughly understood
.
read and
CAUTION - General Safety Precautions
NEVER operate the pump in a confined
area or enclosed area structure that does
not provide ample
free flow of air
.
ALWAYS wear approved eye and hearing
protection before operating the pump.
MQ-D2H/D3H — OPERATION
Figure 11. Engine Choke Lever (CLOSED)
4.Place the
if starting a
choke lever
(Figure 12) in the "OPEN " position
warm engine
or the
OPERATION
temperature is warm.
This section is intended to assist the operator with the
start-up
section be read carefully before attempting to use the pump in
the field.
Starting the Engine (
1.Place the engine
2.Move the
of the trash pump. It is extremely important that this
HONDA
fuel valve lever
position.
Figure 9. Engine Fuel Valve Lever (ON Position)
throttle lever
position, about 1/3 of the way toward the fast position.
engine)
(Figure 9) to the "ON"
(Figure 10) away from the slow
initial
5.Place the
position.
Figure 13. Engine ON/OFF Switch (ON Position)
6.Grasp the starter grip (Figure 14) and slowly pull it out. The
resistance becomes the hardest at a certain position, corresponding to the compression point. Pull the starter grip briskly
and smoothly for starting.
Figure 12. Engine Choke Lever (Open)
engine ON/OFF switch
(Figure 13) in the "ON "
Figure 10. Throttle Lever (1/3 Start Position)
3.Place the
if starting a
choke lever
cold
(Figure 11) in the "CLOSED " position
engine.
Figure 14. Starter Grip
PAGE 18 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13)
Page 19
MQ-D2H/D3H —OPERATION
OPERATION
7.If the engine has started, slowly return the choke lever
(Figure 15 ) to the “OPEN” position. If the engine has not
started repeat steps 1 through 6.
Figure 15. Choke Lever (Open)
8.Before the pump is placed into operation, run the engine for
several minutes. Check for fuel leaks, and noises that would
associate with a lose component.
Stopping The Engine
Normal Shutdown
1.Move the throttle lever to the IDLE position (Figure 17) and
run the engine for three minutes at low speed.
2.After the engine
“OFF” position (Figure 18).
Figure 17. Throttle Lever (Idle)
cools
, turn the engine ON/OFF switch to the
To begin pumping, place the throttle lever (Figure 16) in the
9.
"RUN" position.
3.Place the
position.
Figure 16. Throttle Lever (Run)
Emergency Showdown
Pump speed can be
NOTE
operation can be determined by trying to pump at several speeds.
Limit maximum speed to 65 strokes per minute of the diaphragm
(2,800 RPM engine speed).
the engine throttle control from full
volume, 65 strokes per pinute, to
about 40 strokes per minute for
lesser volume seepage.Smoothest
regulated
1.Move the throttle lever quickly to the “IDLE
with
place the engine ON/OFF switch in the “OFF” position.
Figure 18. Engine ON/OFF Switch (OFF)
fuel shut-off lever
Figure 19. Fuel Valve Lever (OFF)
(Figure 19) in the ”OFF”
”
position, and
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13) — PAGE 19
Page 20
MAINTENANCE
Pump Vacuum Test
To perform the pump vacuum test do the following:
1.Start the engine as outlined in the initial start-up section,
and wait for the pump to begin pumping.
2Check and make sure that there are no air leaks between
the vacuum tester (Figure 21) and the inlet port on the
pump. If air leaks are present reseat vacuum tester.
3.Run the pump for a few minutes while monitoring the
vacuum gauge. If the gauge indicates a reading between
-25 and -20 in. Hg. (inches of mercury) then it can be
assumed that the pump is working correctly.
22 in. Hg (inches of mercury)
NOTE
4.If the vacuum tester gauge indicates a reading
below
is not functioning correctly, and corrective action needs
to be taken.
5.To test the
vacuum tester should remain attached to the pump
suction inlet port by vacuum. This indicates the pump's
flapper valve is seating properly to hold water in the
suction hose when the engine is stopped. This prevents
backflow and allows for faster priming when the engine
is restarted.
-20 in. Hg, it can then be assumed that the pump
flapper valve
translates into 25 feet of lift at
level
.
, shut down the engine. The
Flapper Valve Replacement
1.Remove the two bolts that secure the suction port
chamber (Figure 20) to the pump well. Remove suction
port chamber. Replace valves as required and
reassemble.
sea
2.Remove the two bolts that secure the discharge port
(Figure 20) to the pump well. Remove discharge port
plate.Replace valves as required and reassemble.
Gear Reduction Oil (Transmission)
1.Check gearbox oil level every
at least once a week; more often if any leakage is
detected around the gearbox.
2.Change transmission oil after the first
operation. Use SAE 80/90
Transmission oil capacity is 22 ounces (651 ml.). Check
oil level periodically and change oil after every
of operation.
Figure 20. Flapper Valve Replacement
20 hours
of operation or
40 hours
EP (API GL-5) gear oil.
350 hours
of
Connecting Rod Bearing Lubrication
1.Grease connecting rod bearing (Figure 8) every
8 hours of operation.This is done by rotating the
rod bearing to the 12 o'clock position. At this point
the grease fitting will be visible through the guard
hole.
2.Use only
to NLG1 Grade #2 consistency.
3.Remove connecting rod guard occasionally and
wipe up excess grease from connecting rod
bearing.
PAGE 20 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13)
premium lithium based grease
, conforming
Page 21
MAINTENANCE
NOTE
Figure 21. Pump Vacuum Tester
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13) — PAGE 21
Pressure reading may vary depending on
altitude. See Tables 4 and 5.
Page 22
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.
Stalled/Stopped/Damaging Debris
If Pump has stalled, stopped, or has been engaged in moving
heavy debris laden fluids, perform the following procedures:
1.Remove handle from pump. See Figure 6.
2.Remove the four hex head cap screws, hex nuts, flat
3.Push pump well downwards (Figure 23) to separate from
4.Clean and remove all dirt and debris from pump well.
5.Align pump well, pump base, and diaphragm with each
CAUTION - Stalled or Stopped Pump
During the course of pumping operations that include
heavy debris laden fluids, the pump well MUST be
checked for build-up of rocks, silt, sand and general debris. Failure to clean out the pump cavity (well) could
result in damage to the plunger arm, and pump casing.
washers and lock washers from the pump base.
pump base.
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, silt or other
sediment gather and become lodged in the pump well, the
plunger arm may be prevented from making a normal full
stroke. This action may cause the pump to stall, the crank
to slip on the output shaft, and ultimately cause damage to
the plunger arm.
Similarly, large damaging solids and debris may build in the
pump well and if not removed, may cause extreme damage
to the plunger arm and pump casing. If a jam or suspected
debris build-up occurs, the pump must be thoroughly cleaned
as described in the “Stalled/Stopped/Damaging Debris”
Section.
PAGE 22 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13)
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.
Figure 23. Pump Well (Clean-out)
WARNING - Lock Screw Torqueing
Page 23
MAINTENANCE
Seized Plunger
If the plunger arm has seized, perform the following:
1.Remove plunger guard (Figure 24) by removing slotted
screw (2).
2.Disassemble pump and clean as described in steps 1
thru 4 in the "Stalled Pump" section.
3.Using a torque wrench, torque lock screw (Figure 24) to
70 ft.-lbs. (9.6 kg-m).
Diaphragm Replacement
1.Remove plunger cover as shown in step 1 of the "Seized
Plunger" section.
2.Remove handle as shown in Figure 6 of the "Handle
Installation" section.
3.Rotate pump output shaft until plunger arm is in the
down position.
4.Remove the four hex head cap screws, hex nuts, flat
washers and lock washers from the pump base.
PLUNGER
GUARD
SLOTTED
SCREW
5.Push pump well downwards to separate from pump
base.
6.Remove the three carriage bolts (Figure 25) that secure
the diaphragm to the plunger arm base. Remove
diaphragm.
7.Replace diaphragm, reassemble in reverse order.
LOCK
SCREW
PLUNGER
ARM
70 FT-LBS
(9.6 KG-M)
Figure 24. Lock Screw Torqueing
Figure 25. Diaphragm Replacement
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13) — PAGE 23
Page 24
Engine Maintenance
Perform engine maintenance procedures as referenced by
Table 7 below:
Reference manufacturer engine
manual for specific servicing
instructions.
PAGE 24 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13)
Page 25
MAINTENANCE
Maintenance
Perform the engine maintenance procedures as indicated below:
DAILY
■
Thoroughly remove dirt and oil from the engine and control
area. Clean or replace the air cleaner elements as necessary.
Check and retighten all fasteners as necessary. Check the
spring box and bellows for oil leaks. Repair or replace as
needed.
WEEKLY
■
Remove the fuel filter cap and clean the inside of the fuel
tank.
■
Remove or clean the filter at the bottom of the tank.
■
Remove and clean the spark plug (Figure 26), then adjust
the spark gap to 0.028 ~0.031 inch (0.6~0.7 mm). This unit
has electronic ignition, which requires no adjustments.
ENGINE AIR CLEANER
1.Remove the air cleaner cover and foam filter element as
2.Tap the paper filter element (Figure 28) several times on a
3.Clean foam element in warm, soapy water or nonflammable
DANGER - Combustion (Fire , Explosion)
DO NOT use gasoline as a cleaning solvent. The possibility
exists of fire or explosion.
shown in Figure 28.
hard surface to remove dirt, or blow compressed air [not
exceeding 30 psi (207 kPa, 2.1 kgf/cm
element from the air cleaner case side.
Brushing will force dirt into the fibers. Replace the paper filter
element if it is excessively dirty.
solvent. Rinse and dry thoroughly. Dip the element in clean
engine oil and completely squeeze out the excess oil from the
element before installing.
2
)] through the filter
NEVER
brush off dirt.
Figure 26. Spark Plug Gap
ENGINE OIL
warm
1.Drain the engine oil when the oil is
Figure 27.
2.Remove the oil drain bolt and sealing washer and allow
the oil to drain into a suitable container.
3.Replace engine oil with recommended type oil as listed
in Table 5. Engine oil capacity is .63 quarts (.60 liters). DONOT overfill.
4.Install drain bolt with sealing washer and tighten securely.
as shown in
Figure 28. Engine Air Cleaner
Figure 27. Engine Oil (Draining)
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13) — PAGE 25
Page 26
PREPARATION FOR LONG-TERM STORAGE
Pump Storage
For storage of the pump for over 30 days, the following is
required:
Drain the fuel tank completely.
Run the engine until the fuel is completely consumed.
Completely drain used oil from the engine crankcase
and fill with fresh clean oil, then follow the procedures
described in the engine manual for engine storage.
Remove the pump cover and clean inside of pump
housing. Coat inside of pump housing with a light film of
oil to reduce corrosion. A spray can of oil works well for
this application.
Cover suction and discharge ports with duct tape to
prevent any foreign matter from falling into pump.
Cover pump and engine with plastic covering or
equivalent and store in a clean, dry place.
PAGE 26 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13)
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13) — PAGE 29
Page 30
EXPLANATION OF CODE IN REMARKS COLUMN
The following section explains the different symbols and
remarks used in the Parts section of this manual. Use the
help numbers found on the back page of the manual if there
are any questions.
NOTICE
The contents and part numbers listed in the parts
section are subject to change without notice. Multiquip
does not guarantee the availability of the parts listed.
4 12349 BEARING ..............1 .....S/N 2345B AND ABOVE
NO. Column
Unique Symbols — All items with same unique
symbol
QTY. Column
Numbers Used — Item quantity can be indicated by a
number, a blank entry, or A/R.
A/R (As Required) is generally used for hoses or other
parts that are sold in bulk and cut to length.
A blank entry generally indicates that the item is not sold
separately. Other entries will be clarified in the “Remarks”
Column.
REMARKS Column
Some of the most common notes found in the “Remarks”
Column are listed below. Other additional notes needed
to describe the item can also be shown.
Assembly/Kit — All items on the parts list with the
same unique symbol will be included when this item is
purchased.
Indicated by:
“INCLUDES ITEMS W/(unique symbol)”
(@, #, +, %, or >) in the number column belong to the
same assembly or kit, which is indicated by a note in the
“Remarks” column.
Duplicate Item Numbers — Duplicate numbers indicate
multiple part numbers, which are in effect for the same
general item, such as different size saw blade guards in
use or a part that has been updated on newer versions
of the same machine.
NOTICE
When ordering a part that has more than one item
number listed, check the remarks column for help in
determining the proper part to order.
PART NO. Column
Numbers Used — Part numbers can be indicated by a
number, a blank entry, or TBD.
TBD (To Be Determined) is generally used to show a
part that has not been assigned a formal part number
at the time of publication.
A blank entry generally indicates that the item is not sold
separately or is not sold by Multiquip. Other entries will
be clarified in the “Remarks” Column.
Serial Number Break — Used to list an effective serial
number range where a particular part is used.
Indicated by:
“S/N XXXXX AND BELOW”
“S/N XXXX AND ABOVE”
“S/N XXXX TO S/N XXX”
Specific Model Number Use — Indicates that the part
is used only with the specific model number or model
number variant listed. It can also be used to show a
part is NOT used on a specific model or model number
variant.
Indicated by:
“XXXXX ONLY”
“NOT USED ON XXXX”
“Make/Obtain Locally” — Indicates that the part can
be purchased at any hardware shop or made out of
available items. Examples include battery cables, shims,
and certain washers and nuts.
“Not Sold Separately” — Indicates that an item cannot
be purchased as a separate item and is either part of an
assembly/kit that can be purchased, or is not available
for sale through Multiquip.
PAGE 30 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13)
Page 31
MQD2H/D3H DIAPHRAGM PUMP
1 TO 3 UNITS
HONDA
Qty.P/NDescription
3 ............ 17210ZE0822 ....... ELEMENT AIR CLEANER DUAL
3 ............ 9807955876 .......... SPARK PLUG
1 ............ 17620Z0T813 ....... CAP, FUEL WITH GASKET
Part number on this Suggested
Spare Parts List may super cede/
replace the P/N shown in the text
pages of this book.
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13) — PAGE 31
Page 32
NAMEPLATE AND DECALS ASSY.
MQ-D2H/3H — NAMEPLATE AND DECALS ASSY.
NAME PLATE AND DECALS ASSY.
BACK
3
MODEL
SERIAL NO.
2
5
1
4
FRONT
6
1
CAUTIONPRECAUCIONATTENTION
Avoid equipment damage:
Use noncollapsable hose or pipe
on both suction and discharge.
Do not exceed (60) strokes per
minute with the diaphragm pump.
CAUTION
Avoid personal injury:
KEEP power
shields and
guards in place.
Evite dano en el equipo:
Asegurese que sea reforzada tanto
en la succion como en la
descarga.
No exceda (60) carreras por
minuto con la bomba de
diafragma.
CAUTIONPRECAUCIONATTENTION
Avoid personal injury:
Do not pump flammable
substances with this unit.Exposure
to chemicals can be hazardous.
Follow instructions issued by
chemical manufacturer.
TAG
Éviter l’endommagement du
materiel:
Il faut prendre soin d’utiliser un
tuyau renforce pour l’aspiration et
la decharge.Il ne faut pas
depasser 60 coups/min avec la
pompe a diaphragme.
Evite las lesiones personales:
No bombee sustancias inflamables
con esta unidad.La exposición a
productos químicos puede ser
peligrosa.Siga las instrucciones
publicadas por el fabricante del
producto químico.
5/2003
GREASE
CONNECTING
ROD BEARING
MONTHLY
7
Éviter les blessures corporelles:
Ne pas pomper de substances
inflammables avec cette pompe.
L’exposition aux produits chimiques
peut être dangereuse.Suivre les
instructions données par le
fabricant du produit chimique.
1
DCL1261
1
10/96
PRECAUCION
Evite las lesiones
personales:
Garder tous
les ecrans et
gardes de
securite en
place.
ATTENTION
Eviter les biessures
corporelles:
Mantenga las
defensas y las
protecciones
de la energia
en su lugar
5/2003
NOTES:
ITEMS 5, 6 AND 7 NO LONGER
1
AVAILABLE, REPLACED BY ITEM 4.
PAGE 32 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13)
(PACK OF 4) .............................................................. 1 ...... INCLUDES ITEMS W/#
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13) — PAGE 45
Page 46
TERMS AND CONDITION OF SALE — PARTS
PAYMENT TERMS
Terms of payment for parts are net 30 days.
FREIGHT POLICY
All parts orders will be shipped collect or
prepaid with the charges added to the invoice.
All shipments are F.O.B. point of origin.
Multiquip’s responsibility ceases when a
signed manifest has been obtained from the
carrier, and any claim for shortage or damage
must be settled between the consignee and
the carrier.
MINIMUM ORDER
The minimum charge for orders from Multiquip
is $15.00 net. Customers will be asked for
instructions regarding handling of orders not
meeting this requirement.
RETURNED GOODS POLICY
Return shipments will be accepted and
credit will be allowed, subject to the following
provisions:
A Returned Material Authorization 1.
must be approved by Multiquip prior to
shipment.
To obtain a Return Material Authorization, 2.
a list must be provided to Multiquip
Parts Sales that defines item numbers,
quantities, and descriptions of the items
to be returned.
The parts numbers and descriptions a.
must match the current parts price
list.
The list must be typed or computer b.
generated.
The list must state the reason(s) c.
for the return.
The list must reference the sales d.
order(s) or invoice(s) under
which the items were originally
purchased.
The list must include the name e.
and phone number of the person
requesting the RMA.
A copy of the Return Material Authorization 3.
must accompany the return shipment.
Freight is at the sender’s expense. All 4.
parts must be returned freight prepaid to
Multiquip’s designated receiving point.
Parts must be in new and resalable 5.
condition, in the original Multiquip
package (if any), and with Multiquip part
numbers clearly marked.
The following items are not returnable:6.
Obsolete parts. (If an item is in the a.
price book and shows as being
replaced by another item, it is
obsolete.)
Any parts with a limited shelf life b.
(such as gaskets, seals, “O” rings,
and other rubber parts) that were
purchased more than six months
prior to the return date.
Any line item with an extended c.
dealer net price of less than
$5.00.
Special order items.d.
Electrical components.e.
Paint, chemicals, and lubricants.f.
Decals and paper products.g.
Items purchased in kits.h.
The sender will be notified of any material 7.
received that is not acceptable.
Such material will be held for five 8.
working days from notification, pending
instructions. If a reply is not received
within five days, the material will be
returned to the sender at his expense.
Credit on returned parts will be issued 9.
at dealer net price at time of the original
purchase, less a 15% restocking
charge.
In cases where an item is accepted, for 10.
which the original purchase document
can not be determined, the price will be
based on the list price that was effective
twelve months prior to the RMA date.
Credit issued will be applied to future 11.
purchases only.
PRICING AND REBATES
Prices are subject to change without prior
notice. Price changes are effective on a
specific date and all orders received on or
after that date will be billed at the revised price.
Rebates for price declines and added charges
for price increases will not be made for stock
on hand at the time of any price change.
Multiquip reserves the right to quote and
sell direct to Government agencies, and to
Original Equipment Manufacturer accounts
who use our products as integral parts of their
own products.
SPECIAL EXPEDITING SERVICE
A $35.00 surcharge will be added to the
invoice for special handling including bus
shipments, insured parcel post or in cases
where Multiquip must personally deliver the
parts to the carrier.
LIMITATIONS OF SELLER’S LIABILITY
Multiquip shall not be liable hereunder for
damages in excess of the purchase price of
the item with respect to which damages are
claimed, and in no event shall Multiquip be
liable for loss of profit or good will or for any
other special, consequential or incidental
damages.
LIMITATION OF WARRANTIES
No warranties, express or implied, are
made in connection with the sale of parts or
trade accessories nor as to any engine not
manufactured by Multiquip. Such warranties
made in connection with the sale of new,
complete units are made exclusively by a
statement of warranty packaged with such
units, and Multiquip neither assumes nor
authorizes any person to assume for it
any other obligation or liability whatever in
connection with the sale of its products. Apart
from such written statement of warranty,
there are no warranties, express, implied or
statutory, which extend beyond the description
of the products on the face hereof.
Effective: February 22, 2006
PAGE 46 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13)
Page 47
NOTES
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #7 (05/24/13) — PAGE 47
Multiquip Inc
of their respective owners and used with permission.
This manual
The information and specifications included in this publication were in effect at the time of approval for printing. Illustrations, descriptions, references and technical data contained in
this manual are for guidance only andmay not be considered as binding. Multiquip Inc. reserves the ri
in this publication at any time without notice and without incurring any obligations.
, the MQ logo are registered trademarks of Multiquip Inc. andmay not be used, reproduced, or altered without written permission. All other trademarks are the property
MUST accompany the equipment at all times. This manual is considered a permanent part of the equipment and should remai