Multiquip QP40TH User Manual

PARTS AND OPERATION MANUAL

GAS POWERED TRASH

PUMP MODEL

QP40TH (HONDA)

© COPYRIGHT 2002, MULTIQUIP INC.

Revision #1 (10/01/02)

MULTIQUIP INC

18910 WILMINGTON AVE. 800-427-1244
CARSON, CALIFORNIA 90746 FAX: [phone]
310-537-3700
800-421-1244 800-478-1244
FAX: [phone] FAX: [phone]

E-mail:[e-mail] • www:multiquip.com

Atlanta • Boise • Dallas • Houston • Newark
Montreal, Canada • Manchester, UK
Rio De Janiero, Brazil • Guadalajara, Mexico

..

. PARTS DEPARTMENT:

..

SERVICE DEPARTMENT/TECHNICAL ASSISTANCE:

HERE'S HOW TO GET HELP

PLEASE HAVE THE MODEL AND SERIAL NUMBER
ON-HAND WHEN CALLING

PARTS DEPARTMENT

800-427-1244 or 310-537-3700
FAX: [phone] or 310-637-3284

SERVICE DEPARTMENT/TECHNICAL ASSISTANCE

800-478-1244 or 310-537-3700
FAX: [phone]

WARRANTY DEPARTMENT

888-661-4279, or 310-661-4279
FAX: [phone]

MAIN

800-421-1244 or 310-537-3700
FAX: [phone]

QP40TH — PARTS & OPERATION MANUAL — REV. #0 (08/09/02) — PAGE 3

TABLE OF CONTENTS

Here's How To Get Help ............................................ 3

Table Of Contents ..................................................... 4

Parts Ordering Procedures ....................................... 5

Multiquip QP40TH Trash
Pump

Safety Message Alert Symbols .............................. 6-7

Rules For Safe Operation ...................................... 8-9

Pump Specifications/Dimensions ............................ 10

Engine Specifications .............................................. 11

General Information ................................................ 12

Pump Components ................................................. 13

Basic Engine ........................................................... 14

Pre-Inspection (Engine) .......................................... 15

Pre-Set-up (Pump) .................................................. 16

Initial Start-up (Engine) ...................................... 17-18

Maintenance (Pump) ......................................... 20-21

Maintenance (Engine)........................................ 22-23

Preparation for Long-Term Storage ........................ 24

Troubleshooting (Pump).......................................... 26

Troubleshooting (Pump/Engine) ............................. 27

Explanation Of Code In Remarks Column .............. 28

Suggested Spare Parts ........................................... 29

Pump Assy. ........................................................ 30-33

Honda GX340K1QA2 Engine

Air Cleaner Assy. ................................................ 34-35

Camshaft Assy. .................................................. 36-37

Piston Assy. ........................................................ 38-39

Crankcase Cover Assy. ...................................... 40-41

Crankshaft Assy. ................................................ 42-43

Cylinder Barrel Assy. .......................................... 44-45

Cylinder Head .................................................... 46-47

Fan Cover Assy. ................................................. 48-49

Flywheel Assy. .................................................... 50-51

Fuel Tank Assy. .................................................. 52-53

Ignition Coil Assy. ............................................... 54-55

Carburetor Assy. ................................................ 56-59

Muffler Assy. ....................................................... 60-61

Recoil Starter Assy. ............................................ 62-63

Control Assy. ...................................................... 64-65

Labels Assy. ....................................................... 66-67

Terms and Conditions of Sale ................................. 68

NOTE

Specification and part number
are subject to change without
notice.

PAGE 4 —QP40TH — PARTS & OPERATION MANUAL — REV. #1 (10/01/02)

PARTS ORDERING PROCEDURES

■■

■ 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

■■

■■

■ Specify preferred method of shipment:

■■

UPS Ground

•

UPS Second Day or Third Day*

•

UPS Next Day*

•

Federal Express Priority One (please provide us with your Federal

•

Express account number)*

Airborne Express*

•

Truck or parcel post

•

*Normally shipped the same day the order is received, if prior to 2PM west coast time.

Earn Extra Discounts when

you order by FAX!

All parts orders which include complete part numbers
and are received by fax qualify for the following extra
discounts:

Number of
line items ordered Additional Discount

1-9 items 3%

10+ items** 5%

Get special freight allowances
when you order 10 or more
line items via FAX!**

■■

■

UPS Ground Service at no charge for freight

■■

■■

■

UPS Third Day Service at one-half of actual freight

■■

cost

Extra Fax DiscountExtra Fax Discount

Extra Fax Discount

Extra Fax DiscountExtra Fax Discount

for Domestic USAfor Domestic USA

for Domestic USA

for Domestic USAfor Domestic USA

Dealers OnlyDealers Only

Dealers Only

Dealers OnlyDealers Only

Now! Direct TOLL-FREE access

to our Parts Department!

Toll-free nationwide:

No other allowances on freight shipped by any other carrier.

**Common nuts, bolts and washers (all items under $1.00 list price)
do not count towards the 10+ line items.

*DISCOUNTS ARE SUBJECT TO CHANGE*

Fax order discount and UPS special programs revised June 1, 1995

QP40TH — PARTS & OPERATION MANUAL — REV. #1 (10/01/02) — PAGE 5

800/6-PARTS-7 • 800-672-7877

800-421-1244

Toll-free FAX:

QP40TH — SAFETY MESSAGE ALERT SYMBOLS

FOR YOUR SAFETY AND THE SAFETY OF OTHERS!

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.

This Owner's Manual has been
developed to provide complete
instructions for the safe and efficient

NOTE

operation of the Multiqui p

QP40TH Centrifugal Trash Pump.

Refer to the engine manufacturers
instructions for data relative to its
safe operation.

Before using these pumps,
ensure that the operating
individual has read and
understands all instructions in
this manual.

Model

HAZARD SYMBOLS

SAFETY MESSAGE ALERT SYMBOLS

The three (3) 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 three words: DANGER,

WARNING, or CAUTION.

Lethal Exhaust Gases

Engine exhaust gases contain poisonous
carbon monoxide. This gas is colorless and

odorless, and can cause death if inhaled.
NEVER operate this equipment in a confined

area or enclosed structure that does not
provide ample free flow air.

Explosive Fuel

GASOLINE is extremely flammable, and its
vapors can cause an explosion if ignited. DO
NOT start the engine near spilled fuel or

combustible fluids. DO NOT fill the fuel tank
while the engine is running or hot. DO NOT
overfill tank, since spilled fuel could ignite if it
comes into contact with hot engine parts or
sparks from the ignition system. Store fuel in

approved containers, in well-ventilated areas
and away from sparks and flames. NEVER
use fuel as a cleaning agent.

DANGER: You WILL be KILLED or

SERIOUSLY injured if you do not follow
directions.

WARNING: You CAN be KILLED or

SERIOUSLY injured if you do not follow
directions.

CAUTION: You CAN be injured if you

do not follow directions.

Potential hazards associated with the QP-40TH Centrifugal
Trash Pump operation will be referenced with Hazard Symbols
which appear throughout this manual, and will be referenced in
conjunction with Safety Message Alert Symbols.

Burn Hazards

Engine components can generate extreme heat.
To prevent burns, DO NOT touch these areas
while the engine is running or immediately after
operations. Never operate the engine with heat
shields or heat guards removed.

Rotating Parts

NEVER operate equipment with covers, or

guards removed. Keep fingers, hands, hair and
clothing away from all moving parts to prevent
injury.

PAGE 6 —QP40TH — PARTS & OPERATION MANUAL — REV. #1 (10/01/02)

QP40TH — SAFETY MESSAGE ALERT SYMBOLS

Accidental Starting

ALWAYS place the engine ON/OFF switch in
the OFF position when the pump is not in use.

Sight and Hearing hazard

ALWAYS wear approved eye and hearing

protection.

Respiratory Hazard

ALWAYS wear approved respiratory

protection.

Equipment Damage Messages

Other important messages are provided throughout this manual
to help prevent damage to your pump, other property, or the
surrounding environment.

This pump, other property, or the
surrounding environment could

NOTE

be damaged if you do not follow
instructions.

QP40TH — PARTS & OPERATION MANUAL — REV. #1 (10/01/02) — PAGE 7

RULES FOR SAFE OPERATION

■

DANGER:

Failure to follow instructions in this manual may
lead to serious injury or even death! This
equipment is to be operated by trained and
qualified personnel only! This equipment is for
industrial use only.

The following safety guidelines should always be used when
operating the

GENERAL SAFETY

■

DO NOT operate or service this equipment before
reading this entire manual.

■

This equipment should not be operated by
persons under 18 years of age.

■

NEVER operate this equipment without proper
protective clothing, shatterproof glasses, steel­toed boots and other protective devices required
by the job.

■

NEVER operate this equipment when not feeling
well due to fatigue, illness or taking medicine.

trash pump

:

NEVER touch the hot exhaust manifold,
muffler or cylinder. Allow these parts to
cool before servicing engine or pump.

■

High Temperatures – Allow the engine to cool before adding
fuel or performing service and maintenance functions. Contact

hot

with

■

The engine of this pump requires an adequate free flow of
cooling air.
narrow area where free flow of the air is restricted. If the air

components can cause serious burns.

NEVER!

operate the roller in any enclosed or

flow is restricted it will cause
serious damage to the
pump or engine and may
cause injury to people and
property. Remember the

pump's engine (gasoline
models only) gives off
DEADLY gases.

■

NEVER operate this equipment under the
influence or drugs or alcohol.

■

Whenever necessary, replace nameplate, operation and
safety decals when they become difficult read.

■

ALWAYS check the machine for loosened threads or bolts
before starting.

■

ALWAYS wear proper respiratory (mask) hearing and eye
protection equipment when operating the pump.

■

ALWAYS refuel in a well-ventilated area, away from sparks
and open flames.

■

ALWAYS use extreme caution when working with flammable
liquids. When refueling, stop the engine and allow it to cool.

DO NOT

could result from fuel vapors, or if fuel is spilled on a hot
engine.

■

NEVER operate the pump in an

atmosphere

materials. An explosion or fire could result
causing severe

smoke around or near the machine. Fire or explosion

explosive

or near combustible

bodily harm or even

death.

■

Topping-off to filler port is dangerous, as it tends to spill fuel.

■

Refer to the
questions or information.

■

NEVER use accessories or attachments, which are not
recommended by Multiquip for this equipment. Damage to
the equipment and/or injury to user may result.

■

Manufacturer does not assume responsibility for any accident
due to equipment modifications.

Engine Owner's Manual

for engine technical

PAGE 8 —QP40TH — PARTS & OPERATION MANUAL — REV. #1 (10/01/02)

■

NEVER Run engine without air cleaner. Severe engine

damage may occur.

■

ALWAYS read, understand, and follow procedures in
Operator’s Manual before attempting to operate equipment.

■

ALWAYS be sure the operator is familiar with proper safety
precautions and operation techniques before using pump.

■

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.

■

■

Maintenance Safety

■

NEVER leave the pump unattended, turn off engine when
unattended.

■

Unauthorized equipment modifications will void all
warranties.

■

NEVER pump volatile, explosive, flammable or low flash
point fluids. These fluids could ignite or explode.

■

NEVER operate the pump in an

■

Before starting the pump, check that the clean-out cover is

explosive

atmosphere.

securely fasten.

■

ALWAYS ensure pump is on level ground before use.

■

Become familiar with the components of the pump before
operating.

■

ALWAYS replace any worn or damaged warning decals.

■

NEVER pump corrosive chemicals or water containing toxic
substances. These fluids could create serious health and
environmental hazards. Contact local authorities for
assistance.

■

■

■

■

■

■

■

Emergencies

■

RULES FOR SAFE OPERATION

High Temperatures – Always stop engine and allow the

engine to cool before adding fuel, oil or performing service

hot

and maintenance functions. Contact with
cause serious burns.

NEVER disconnect any

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.

"emergency or safety devices"

NEVER lubricate components or attempt service on a running

machine.

ALWAYS allow the machine a proper amount of time to cool

before servicing.
Keep the machinery in proper running condition.
Fix damage to the machine immediately and always replace

broken parts, or missing decals.
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.

ALWAYS know the location of the

nearest

fire extinguisher

.

components can

.

■

NEVER open the priming plug when pump is hot. Hot water

inside could be pressurized much like the radiator of an
automobile. Allow pump to cool to the touch before loosening
plug.

■

NEVER open the pump housing during operation or start the

pump with the clean-out cover removed. The rotating impeller
inside the pump can cut or sever objects caught in it.

■

NEVER block or restrict flow from discharge hose. Remove

kinks from discharge line before starting pump. Operation
with a blocked discharge line can cause water inside pump
to overheat.

■

ALWAYS fill the pump casing with water before starting the
engine. Failure to maintain water inside the pump housing
will cause severe damage to the pump.

■

In winter drain water from pump housing to prevent freezing.

QP40TH — PARTS & OPERATION MANUAL — REV. #1 (10/01/02) — PAGE 9

■

■

ALWAYS know the location of the nearest

first aid kit

In emergencies

nearest phone or

.

always

know the location of the

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.

QP40TH — SPECIFICATIONS/DIMENSIONS (PUMP)

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Figure 1. QP-40TH Pump Dimensions

PAGE 10 —QP40TH — PARTS & OPERATION MANUAL — REV. #1 (10/01/02)

QP40TH — SPECIFICATIONS/DIMENSIONS (PUMP)

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QP40TH — PARTS & OPERATION MANUAL — REV. #1 (10/01/02) — PAGE 11

QP40TH — GENERAL INFORMATION

APPLICATION

The

QP40TH Centrifugal Trash Pump

for de-watering applications. Both the suction and discharge
ports on the QP40TH pump use a 4-inch diameter opening,
which allows the pump to pump at a rate of approximately
611gallons/minute (gpm) or 2,313 liters/minute (lpm).

Centrifugal or self priming pumps are designed to purge air from
the suction line and create a partial vacuum in the pump body.
The reduced atmospheric pressure inside the pump allows water
to flow through the suction line and into the pump body. The
centrifugal force created by the rotating impeller pressurizes the
water and expels it from the pump.

Power Plant

This trash pump is powered by an 11 horsepower air cooled 4­stroke, single cylinder
incorporates a low "

Oil Alert Feature

In the event of
a built-in oil alarm engine shut-down feature. In the event the oil
level is low the engine will automatically shut-down.

Trash Pump

Trash pumps derive their name from their ability to handle a
greater amount of debris and solids than standard centrifugal
pumps. These pumps generally handle solids up to 1/2 the size
of the discharge opening making them less likely to clog. Also
trash pumps are capable of handling water with 25% solids by
weight.

low oil

HONDA GX-340

Oil Alert Feature

or

no oil

, the HONDA GX-340 engine has

is designed to be used

gasoline engine that

"

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 put the pump as close to the
water as possible.

Pump Support

The pump should always be placed on

ground

NEVER place the pump on

connection should always be checked for tightness and leaks. A
small suction leak in the hose or fittings could prevent the pump
from priming.

Elevation

Elevations over 3,000 feet 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.

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.

For example, in Flagstaff, Arizona where the elevation is
approximately 7,000 feet, the pump would have a suction lift of
only 18 feet rather than the 25 feet at sea level.

in a level position.

soft soil

. The suction hose or pipe

solid stationary

The advantage of using a trash pump is that it can be quickly
and easily disassembled in the field "
cleaned when clogged.

PAGE 12 —QP40TH — PARTS & OPERATION MANUAL — REV. #1 (10/01/02)

without tools

" and easily

QP40TH — PUMP COMPONENTS

Figure 2 shows a typical application using the QP40TH Centrifugal Trash 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
should not exceed 2 inches (50 mm) 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.

Figure 2. QP-40TH Pump Application

1. Pump – The model MQ40TDH is 4-inch trash pump used
in general de-watering applications. Typical dewatering
applications consist of manholes, septic tanks, fast and
slow seepage ditch water, silt water, mud water and muck
water.

2. Fill Cap – Prior to operation, the pump casing should be
filled with water. Remove this cap to add water to the pump.
After the initial prime, a sufficient amount of water will be
retained in the casing so that the operator will not need to
re-prime later.

If the casing is dry or has insufficient water, the pump will
have difficulty in priming which could lead to premature
mechanical seal wear thus causing damage to the pump.

3. Discharge Port – Connect a 4-inch discharge hose to this
port.

4. Worm Clamp – Used to secure the hose to the inlet and
outlet ports on the pump. Use two clamps to secure the
hose on the inlet side of the pump.

5. Discharge Hose – Connect this 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.

6. Suction Port – Connect a 4-inch inlet hose to this port.

7. Suction Hose – Connect this flexible rubber hose to the

8. Clean-out Cover Handles – To gain access to the pump's

9. Drain Plug – Remove this plug to drain water from the

10. Clean-out Cover – Remove cover to gain access to the

11. Locking Knobs– Turn both knobs clockwise to secure

12. Strainer – Always attach a strainer to bottom side of the

Use two worm clamps to secure the hose.

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

clean-out area, grip both handles, then pull to remove cover.
Make sure both locking knobs have been released before
attempting to remove clean-out cover.

pump.

clean-out area.

clean-out cover, turn counter-clockwise to release cover.

suction hose to prevent large objects and debris from
entering the pump. Strainer should be positioned so that it
will remain completely under water. Running the pump with
the strainer above water for long periods can damage pump.

QP40TH — PARTS & OPERATION MANUAL — REV. #1 (10/01/02) — PAGE 13

QP40TH — BASIC ENGINE

Figure 3. Engine Controls and Components

INITIAL SERVICING

The engine (Figure 3) must be checked for proper lubrication and
filled with fuel prior to operation. Refer to the manufacturers engine
manual for instructions & details of operation and servicing. The
engine shown above is a HONDA engine, operation for other
types of engines may vary somewhat.

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.

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.

DANGER

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

advanced forward

FAST

).

SLOW

, lever back toward operator

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.

NOTE

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.

WARNING

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.

5. Fuel Valve Lever – OPEN to let fuel flow, CLOSE to stop
the flow of fuel.

PAGE 14 —QP40TH — PARTS & OPERATION MANUAL — REV. #1 (10/01/02)

while the engine is running or immediately after operating. NEVER
operate the engine with the muffler removed.

10. Fuel Tank – Holds unleaded gasoline. For additional

Engine components can generate extreme heat.
To prevent burns, DO NOT touch these areas

information refer to engine owner's manual.

QP40TH — PRE-INSPECTION (ENGINE)

CAUTIONCAUTION

CAUTION

CAUTIONCAUTION

NEVER operate the pump
in a confined area or
enclosed area structure that
does not provide ample

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. Clean the pump, removing dirt and
dust, particularly the engine
cooling air inlet, carburetor and air
cleaner.

3. Check the air filter for dirt and dust. If air filter is dirty, replace
air filter with a new one as required.

4. Check carburetor for external dirt and dust. Clean with dry
compressed air.

.

free

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 3). Maximum oil
capacity is 1.16 quarts (1.1 liters)

Figure 5. Engine Oil Dipstick (Oil Level)

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5. Check fastening nuts and bolts for tightness.

DANGERDANGER

DANGER

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.

Figure 4. Engine Oil Dipstick (Removal)

DANGERDANGER

Fuel Check

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

Explosive Fuel

Motor fuels are highly flammable and can be
dangerous if mishandled. DO NOT smoke
while refueling. DO NOT attempt to refuel the
pump if the engine is

hot! or running

immediately!

.

QP40TH — PARTS & OPERATION MANUAL — REV. #1 (10/01/02) — PAGE 15

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.

QP40TH — PRE-SETUP (PUMP)

Suction and discharge hoses are

NOTE

available from Multiquip. Contact
your nearest dealer for more
information.

3. To prime pump, remove fill cap (Figure 2) and fill pump casing
with water. If the pump casing is not filled with water before
starting, it will not begin pumping.

5. The discharge hose is usually a

6. Make sure the

CAUTION :

Pump casing
before using pump. Otherwise pump will
not be able to begin pumping.

must

be filled with water

CAUTION :

WARNING :

DO NOT open

inside may be under pressure.

fill cap

if pump is hot! Water

CAUTION :

4. Check for
between the pump and engine housing, the seal inside the
pump may be worn or damaged. Continued operation of the
pump is not recommended. Further usage of the pump under
these conditions may cause severe water damage to engine.

leaks

between pump and engine. If water is leaking

collapsible

hose, however if a thin-walled discharge hose is not avail­able, a rigid suction hose can be substituted in its place.

suction strainer

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.

The strainer should be positioned so it will

remain completely
pump with the strainer above water for long
periods can damage the pump.

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.

(Figure 2) is clean and

under water

(thin-walled)

. Running the

Hoses and Clamps

1. Check that all hoses are
Make certain suction hose (Figure 2) does not have any air
leakage. Tighten hose clamps and couplings as required.

2. It is recommended that 2 clamps be used when securing the
suction hose to the inlet side (suction) of the pump.

3. Remember suction hoses must be
collapse when the pump is in operation.

4. 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.

the

discharge

securely

hose (Figure 2) is not restricted.

PAGE 16 —QP40TH — PARTS & OPERATION MANUAL — REV. #1 (10/01/02)

attached to the pump.

rigid

enough not to

CAUTION :

This pump uses a water-cooled

to prevent water from seeping into the

seal

engine. The passage of water through the
pump casing lubricates the seal and prevents
it from overheating.
without water in the casing as this will cause
damage to the mechanical seal.

NEVER!

mechanical

operate the pump

QP40TH — INITIAL START-UP (ENGINE)

CAUTION :

DO NOT attempt to operate the pump until the Safety, General

Information and Inspection sections of this manual have been

read and 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

HONDA

fuel valve lever

position.

.

initial

engine)

(Figure 6) to the "ON"

3. Place the
starting a

4. Place the
if starting a

choke lever

cold

engine.

Figure 8. Engine Choke Lever (Open)

choke lever

warm engine

(Figure 8) in the "

(Figure 9) in the "

or the

temperature is warm.

OPEN

CLOSED

" position if

" position

Figure 6. Engine Fuel Valve Lever (ON Position)

2. Move the
position, about 1/3 of the way toward the fast position.

Figure 7. Throttle Lever (1/3 Start Position)

throttle lever

(Figure 7) away from the slow

Figure 9. Engine Choke Lever (Closed)

5. Place the
position.

Figure 10. Engine ON/OFF Switch (ON Position)

engine ON/OFF switch

(Figure 10) in the "

ON

"

QP40TH — PARTS & OPERATION MANUAL — REV. #1 (10/01/02) — PAGE 17

QP40TH — INITIAL START-UP (ENGINE)

6. Grasp the starter grip (Figure 11) 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 11. Starter Grip

7. If the engine has started, slowly return the choke lever
(Figure 12 ) to the
started repeat steps 1 through 6.

CLOSED

position. If the engine has not

CAUTION :

Stopping The Engine

Normal Shutdown

1. Move the throttle lever to the IDLE position (Figure 27) and
run the engine for three minutes at low speed.

2. After the engine
“OFF” position (Figure 15).

ALWAYS run engine at
pumping.

Figure 14. Throttle Lever (Idle)

cools

, turn the engine ON/OFF switch to the

full speed

while

Figure 12. Choke Lever (Closed)

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.

To begin pumping, place the throttle lever (Figure 13) in the

9.

RUN

"position.

"

Figure 23. Throttle Lever (Run)

PAGE 18 —QP40TH — PARTS & OPERATION MANUAL — REV. #1 (10/01/02)

3. Place the
position.

Emergency Showdown

1. Move the throttle lever quickly to the
the engine ON/OFF switch in the

Figure 15. Engine ON/OFF Switch (OFF)

fuel shut-off lever

Figure 16. Fuel Valve Lever (OFF)

(Figure 16) in the OFF

IDLE

position, and place

OFF

position.

NOTE PAGE

QP40TH — PARTS & OPERATION MANUAL — REV. #1 (10/01/02) — PAGE 19

QP40TH — MAINTENANCE (PUMP)

Pump Vacuum Test

CAUTION :

DO NOT attempt to start the engine unless

the pump has previously been
water. Severe pump damage will occur if
pump has not been primed.

To perform the pump vacuum test do the following:

1. Remove the pump fill cap, and fill the pump with water.

2. Start the engine as outlined in the initial start-up section,
and wait for the pump to begin pumping.

3. As shown in Figure 17 (next page), place a water hose
inside the discharge opening of the pump, and turn on
the water. This flow of water into the discharge opening
will

prevent

4. Place the
the pump suction (inlet) opening (Figure 17) with the
vacuum gauge facing upwards. It may be necessary to
apply a small amount of water around the rubber seal of
the vacuum tester to make a good suction fit.

the pump from running dry.

Pump Vacuum Tester

(P/N 7000030) over

primed

with

Adjusting Impeller Clearance

1. If it is necessary to replace impeller or volute, be sure
clearance between impeller and volute is adjusted
correctly.

2. The impeller should be as close to the volute as possible
without rubbing against it. Clearance is adjusted by
adding or removing

3. Check clearance between impeller and insert by slowly
pulling starter rope to turn impeller. Remove spark plug
to make it easier to turn impeller.

NOTE

down, additional shims may be required to maintain the
clearance between the impeller and insert.

4. Check the impeller
clearance between the impeller face and the volute. Also
check the shaft seal for wear, as well as the shaft sleeve.

shims

every six months

from behind the impeller.

It is important not to remove too
many shims or the clearance
between the impeller and volute
will become
performance will be reduced.
Remember as the impeller wear

too wide

and pump

for wear, and for

5. Check and make sure that there are no air leaks between
the vacuum tester and the inlet port on the pump. If air
leaks are present reseat vacuum tester.

6. 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.

25 in. Hg (inches of mercury)

NOTE

translates into 25 feet of lift at

level

.

sea

Pump Cleaning

After pumping water containing large amounts of dirt and
debris, perform the following:

1. Remove the drain plug from the pump housing (Figure 1)
and drain any water left in the pump.

2. Loosen the two locking hand knobs (turn counter­clockwise) and remove

3. Clean and remove dirt, debris from pump casing. Inspect
impeller and volute for wear. Replace any damaged or
worn parts.

CAUTION :

7. If the vacuum tester gauge indicates a reading

below

is not functioning correctly, and corrective action needs
to be taken.

6. 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

, shut down the engine. The

clean-out cover

The impeller may develop
Use extreme care when cleaning around
the impeller to prevent being cut.

.

sharp edges

.

PAGE 20 —QP40TH — PARTS & OPERATION MANUAL — REV. #1 (10/01/02)

QP40TH — MAINTENANCE (PUMP)

Figure 17. Pump Vacuum Tester

QP40TH — PARTS & OPERATION MANUAL — REV. #1 (10/01/02) — PAGE 21