Multiquip MQD2H User Manual
OPERATION AND PARTS MANUAL
MODELS
DIAPHRAGM PUMPS
(Honda
MQD2H
MQD3H
GX120K1QX2
Revision #6 (10/27/11)
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. #6 (10/27/11)
NOTES
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 3
TABLE OF CONTENTS
MQ-D2H/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 GX120K1QX2 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. #6 (10/27/11)
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. #6 (10/27/11) — 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.
Symbol Safety Hazard
Rotating parts hazards
Electric shock hazards
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. #6 (10/27/11)
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. #6 (10/27/11) — PAGE 7
SAFETY INFORMATION
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.
NEVER use pump for swimming pool dewatering applications.
This can result in electrical shock or electrocution.
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 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.
DO NOT restrict the flow of the discharge hose as it may
cause overheating.
Be careful of discharge whipping under pressure.
NOTICE
ALWAYS place the pump in an upright position on a
platform before using. The platform will prevent the pump
frowm burrowing itself on soft sand or mud.
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.
Keep machine in proper running condition.
ELECTRICAL SAFETY
DANGER
The electrical voltage required to operate
pump can cause severe injury or even death
through physical contact with live circuits.
ALWAYS disconnect electrical power from
pump before performing maintenance on
pump.
NOTICE
ALWAYS
pump is correct. Always read the pump’s nameplate to
determine what the power requirements are.
make certain that the voltage supplied to the
PAGE 8 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)
SAFETY INFORMATION
Power Cord/Cable Safety
DANGER
NEVER let power cords or cables lay in water.
NEVER use damaged or worn cables or cords. Inspect
for cuts in the insulation.
NEVER grab or touch a live power
cord or cable with wet hands. The
possibility exists of electrical shock,
electrocution or death.
Make sure power cables are securely connected to the
motor's output receptacles. Incorrect connections may
cause electrical shock and damage to the motor.
WARNING
NEVER attempt to use the power cord as a lifting or
lowering device for the pump.
NOTICE
ALWAYS make certain that proper power or extension
cord has been selected for the job. See Cable Selection
Chart in this manual.
Grounding Safety
DANGER
ALWAYS make sure pump is grounded.
ALWAYS make sure that electrical circuits are properly
grounded to a suitable earth ground (ground rod) per
the National Electrical Code (NEC) and local codes
before operating generator. Severe injury or death by
electrocution can result from operating an ungrounded
motor.
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 by
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.
NEVER use gas piping as an electrical ground.
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 9
)pmuP(snoitacificepS.1elbaT
epyTpmuPmgarhpaiDH2D-QMpmuPmgarhpaiDH3D-QM
SPECIFICATIONS
egrahcsiD&noitcuS
eziS
gnipmuPmumixaM
pmuP
thgieWteNyrD
yticapaC
retemaiDsdiloS.xaM)mm1.83(.ni2/1-1)mm572.14(ni8/5-1
tfiLxaM)sretem29.7(.tf62)sretem29.7(.tf62
daeH.xaM)sretem26.7(.tf52)sretem26.7(.tf52
).mm8.05(.ni00.2).mm2.67(.ni00.3
ruoh/snollag000,3
)ruoh/sretil043,11(
).gK36(.sbl041
ruoh/snollag004,5
)ruoh/sretil654,02(
).gK27(.sbl061
Table 2. Specifications (Engine)
Model HONDA GX120K1QX2
Air-cooled 4 stroke, Single
Ty p e
Cylinder, OHV, Horizontal
Shaft Gasoline Engine
Engine
Dimension
(L x W x H)
Dry
Net Weight
Bore X Stroke
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
Lube Oil Capacity .60 liters (0.63 qts)
Speed Control
Method
Starting Method Recoil Start
2.4 in. x 1.7 in.
(60 mm x 42 mm)
Unleaded Automobile
Gasoline
Centrifugal Fly-weight Type
11.7 x 13.4 x 12.5 in.
(297 x 341 x 318 mm)
28.7 lbs (13 Kg.)
PAGE 10 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)
MQ-D2H/D3H — DIMENSIONS (PUMP)
DIMENSIONS
Figure 1. MQ-D2H/D3H Pump Dimensions
snoisnemiD.3elbaT
LEDOM
H2D-QM
H3D-QM
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 11
A
HTGNEL
.ni93
).mc60.99(
.ni5.14
).mc14.501(
B
C
THGIEH
.ni35.72
).mc39.96(
.ni22
).mc88.55(
HTDIW
.ni86.52
).mc32.56(
.ni03
).mc2.67(
D
EGRAHCSID
.
ni43.7
).mc46.81(
.ni2.6
(
).mc57.51
E
NOITCUS
.ni26.5
).mc72.41(
.ni3.6
).mc61(
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
leveLaeS)840.3(0.01)275.4(0.51)690.6(0.02)026.7(0.52
,2)086.2(08.8)320.4(2.31)463.5(6.71)507.6(0.22
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
,3(000,01)737.1(07.5)126.2(06.8)474.3(4.11)853.4(3.41
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.
edutitlA
)sreteM(teeF
)016(000
)912,1(000,4)773.2(08.7)665.3(7.11)457.4(6.51)349.5(5.91
)928,1(
)834,2(000,8)988.1(02.6)438.2(03.9)977.3(4.21)427.4(5.51
)840
snoitavelE
edutitlA
sreteM(teeF
leveLaeS%001%001
)016(000,2%79%59
)912,1(000,4%59%19
)928,1(000,6%3
9%78
wolFegrahcsiDdaeHegrahcsiD
snoitavelEsuoiraVtatfiLnoitcuS.4elbaT
)sreteM(teeFnitfiLnoitcuS
suoiraVtassoLecnamrofreP.5elbaT
NEVER place the pump on
soft soil
. The suction hose or pipe
)834,2(000,8%19%38
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. #6 (10/27/11)
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 – Fill with clean
water to assist with faster priming times.
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.
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
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.).
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.
10. Connecting Rod Grease Access Hole – Grease
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. #6 (10/27/11) — 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. #6 (10/27/11)
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
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.
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.
Figure 5. Engine Oil Dipstick (Oil Level)
epyTliO.6elbaT
nosaeS erutarepmeT epyTliO
remmuS rehgiHroC°52 03-W01EAS
llaF/gnirpS C°01~C°52 02/03-W01EAS
retniW rewoLroC°0 01-W01EAS
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. #6 (10/27/11) — PAGE 15
SETUP
Handle Installation
WARNING - Fill Cap
The MQ-D2H/D3H diaphragm pumps are completely
assembled except for the steering handle. Attach the steering
handle to the pump base as shown in Figure 6.
DO NOT open
be under pressure.
Hoses and Clamps
1. Check that all hoses are
Make certain suction hose (Figure 2) does not have any air
GEAR
BOX
leakage. Use teflon tape or pipe dope on NPT threads.
2. Remember suction hoses must be
collapse when the pump is in operation.
HANDLE
PUMP BASE
BOLT
WASHER
Check that the
3.
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.
NOTE
Figure 6. Handle Installation
fill cap
discharge
if pump is hot! Water inside may
securely
hose (Figure 2) is not restricted.
attached to the pump.
rigid
enough not to
Suction and discharge hoses are
available from Multiquip. Contact
your nearest dealer for more
information.
Before Starting:
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.
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.
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. #6 (10/27/11)
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.
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.
This pump uses a water-cooled
NOTE
mechanical seal
from seeping into the engine. The
to prevent water
passage of water through the pump
casing lubricates the seal and
prevents it from overheating.
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.
Figure 8. Connecting Rod Bearing Lubrication
Helpful Hints
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
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.
■
Engine overloads and slow downs.
■
Reduced efficiency.
Figure 7. Transmission Oil Level
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 17
MQ-D2H/D3H — OPERATION
OPERATION
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
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
of the trash pump. It is extremely important that this
position.
.
HONDA
fuel valve lever
read and
initial
engine)
(Figure 9) to the "ON"
4. Place the
if starting a
5. Place the
position.
choke lever
warm engine
Figure 12. Engine Choke Lever (Open)
engine ON/OFF switch
(Figure 12) in the "OPEN " position
or the
temperature is warm.
(Figure 13) in the "ON "
Figure 9. Engine Fuel Valve Lever (ON Position)
2. Move the
position, about 1/3 of the way toward the fast position.
3. Place the
if starting a
throttle lever
Figure 10. Throttle Lever (1/3 Start Position)
choke lever
cold
engine.
(Figure 10) away from the slow
(Figure 11) in the "CLOSED " 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 14. Starter Grip
Figure 11. Engine Choke Lever (CLOSED)
PAGE 18 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)
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. #6 (10/27/11) — PAGE 19
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.
2 Check 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. #6 (10/27/11)
premium lithium based grease
, conforming
MAINTENANCE
NOTE
Figure 21. Pump Vacuum Tester
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 21
Pressure reading may vary depending on
altitude. See Tables 4 and 5.
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 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
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
If pump has stopped or stalled for any unknown reason,
clean out pump cavity (well)
comply could result in damage to plunger arm or other
internal pump components.
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.
thoroughly. Failure to
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.
PAGE 22 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)
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
MAINTENANCE
Seized Plunger
If the plunger arm has seized, perform the following:
1. Remove plunger guard (Figure 24) by turning guard hand
knob counterclockwise to loosen.
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.
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.
Figure 24. Lock Screw Torqueing
Figure 25. Diaphragm Replacement
MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11) — PAGE 23
Engine Maintenance
Perform engine maintenance procedures as referenced by
Table 7 below:
MAINTENANCE
eludehcSecnanetniaMenignE.7elbaT
TSRIF
)3(NOITPIRCSEDNOITAREPOEROFEB
KCEHCX
liOenignE
EGNAHCX
KCEHCX
renaelCriA
EGNAHC)1(X
stloB&stuNllA
gulPkrapS
sniFgnilooCKCEHCX
retserrAkrapSNAELC X
knaTleuFNAELC X
fInethgit-eR
yrasseceN
NAELC-KCEHCX
ECALPER X
X
HTNOM
RO
.SRH01
YREVE
SHTNOM3
RO
.SRH52
YREVE
SHTNOM6
RO
.SRH05
YREVE
RAEY
RO
01
.SRH0
YREVE
SRAEY2
RO
.SRH002
retliFleuFKCEHC X
DA-KCEHC )2(X
nidesunehwylt
resebdluohssmetiesehT)2(
serudecorpecivresroflaunaMpohsADNOHehtotrefeR.tneiciforp
reporpenimretedotnoitarepofosruohgol,esulaicremmocroF)3(
.slavretniecnanetniam
yllacinahcemeradnaslootreporpehtevahuoysselnu,relaedcivresruoyybdeciv
NOTE
deepSeldITSUJ
ecnaraelCevlaVTSUJDA-KCEHC )2(X
senilleuFKCEHC )2()yrassecenfiecalper(sraey2yrevE
neuqerferomecivreS)1( YTSUD .saera
Reference manufacturer engine
manual for specific servicing
instructions.
PAGE 24 — MQD2H/3H DIAPHRAGM PUMPS — OPERATION AND PARTS MANUAL — REV. #6 (10/27/11)
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). DO
NOT 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. #6 (10/27/11) — PAGE 25
Loading...