Honda WDP20X, WDP30X Owner's Manual

Owner’s Manual

DIAPHRAGM PUMP

WDP20X • WDP30X

 WARNING: 

The engine exhaust from this product

contains chemicals known to the State of

California to cause cancer, birth defects or

other reproductive harm.

This owner's manual is considered a permanent part of your diaphragm pump. It must be available to all operators of the pump and should remain with the pump if resold.

The information and specifications in this publication were in effect at the time of approval for printing. American Honda Motor Co., Inc. reserves the right to discontinue or change specifications or design at any time without notice and without incurring any obligation whatever. No part of this publication may be reproduced without written permission.

INTRODUCTION

Congratulations on your selection of a Honda diaphragm pump! We are certain you will be pleased with your purchase of one of the finest pumps on the market.

We want to help you get the best results from your new pump and to operate it safely. This manual contains the information on how to do that; please read it carefully.

As you read this manual, you will find information preceded by a

NOTICE

damage to your pump, other property, or the environment.

We suggest you read the warranty policy to fully understand its coverage and your responsibilities of ownership. The Distributor’s Limited Warranty is shown on page 69.

When your pump needs scheduled maintenance, keep in mind that your authorized Honda servicing dealer is specially trained in servicing Honda pumps and is supported by the parts and service divisions of American Honda. Your Honda dealer is dedicated to your satisfaction and will be pleased to answer your questions and concerns.

symbol. That information is intended to help you avoid

Best Wishes, Power Equipment Division American Honda Motor Co., Inc.

INTRODUCTION

A FEW WORDS ABOUT SAFETY

Your safety, and the safety of others, are very important. And using this pump safely is an important responsibility.

To help you make informed decisions about safety, we have provided operating procedures and other information on labels and in this manual. This information alerts you to potential hazards that could hurt you or others.

Of course, it is not practical or possible to warn you about all the hazards associated with operating or maintaining a pump. You must use your own good judgment.

You will find important safety information in a variety of forms, including:

• Safety Label - on the pump.

• Safety Messages - preceded by a safety alert symbol  and one

of three words: DANGER, WARNING, or CAUTION.

These signal words mean:

 DANGER

 WARNING

 CAUTION

• Safety Headings - such as IMPORTANT SAFETY

INFORMATION.

• Safety Section - such as PUMP SAFETY.

• Instructions - how to use this pump correctly and safely.

This entire book is filled with important safety information - please read it carefully.

You WILL be KILLED or SERIOUSLY HURT if you don't follow instructions.

You CAN be KILLED or SERIOUSLY HURT if you don't follow instructions.

You CAN be HURT if you don't follow instructions.

PUMP SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

IMPORTANT SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . 6

Operator Responsibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Pump Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Refuel With Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Hot Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Carbon Monoxide Hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

SAFETY LABEL LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

CONTROLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

COMPONENT IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . 9

DESCRIPTION OF CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . 10

Throttle Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Choke Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Fuel Valve Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Ignition Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Oil Alert™ System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Recoil Starter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

BEFORE OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

ARE YOU READY TO GET STARTED? . . . . . . . . . . . . . . . . . . 12

Knowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

IS YOUR PUMP READY TO GO? . . . . . . . . . . . . . . . . . . . . . . . 13

Check the General Condition of the Pump . . . . . . . . . . . . . . 13

Check the Suction and Discharge Hoses . . . . . . . . . . . . . . . 14

Check the Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

SAFE OPERATING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . 15

PUMP PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Suction Hose Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Discharge Hose Connection . . . . . . . . . . . . . . . . . . . . . . . . . 19

Pump Priming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

STARTING THE ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

STOPPING THE ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Emergency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Normal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

SERVICING YOUR PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

THE IMPORTANCE OF MAINTENANCE . . . . . . . . . . . . . . . . . 23

MAINTENANCE SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

MAINTENANCE SCHEDULE . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

ENGINE OIL LEVEL CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

ENGINE OIL CHANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

ENGINE OIL RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . 29

CONTENTS

AIR FILTER INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

AIR FILTER CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

SPARK PLUG SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

SPARK ARRESTER SERVICE (optional equipment) . . . . . . . . 34

REFUELING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

FUEL RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 36

CARBURETOR ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . 37

Sediment Cup Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

FUEL FILTER/FUEL LINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

PUMP CHAMBER FLUSHING . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Pump Hoses and Strainer . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

GREASE THE PUMP CONNECTING ROD . . . . . . . . . . . . . . . . 40

PUMP GEAR BOX OIL CHANGE . . . . . . . . . . . . . . . . . . . . . . . 41

PUMP CLAPPET VALVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

PUMP DIAPHRAGM DISASSEMBLY . . . . . . . . . . . . . . . . . . . . 45

PUMP DIAPHRAGM REASSEMBLY . . . . . . . . . . . . . . . . . . . . . 48

STORAGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

STORAGE PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Cleaning the Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Cleaning the Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

PLACING IN STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

REMOVAL FROM STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . 55

TRANSPORTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

BEFORE LOADING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

LOADING AND UNLOADING . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

TAKING CARE OF PROBLEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

ENGINE WILL NOT START . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Spark Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

PUMP WILL NOT PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

TECHNICAL AND CONSUMER INFORMATION. . . . . . . . . . . . . . . 59

TECHNICAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Carburetor Modification for High Altitude Operation . . . . . . . 60

Oxygenated Fuels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

EMISSION CONTROL SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . 62

Source of Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Dimensions and Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Engine Design and Performance . . . . . . . . . . . . . . . . . . . . . 65

Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Gear Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

CONTENTS

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Tune-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Pump Performance Curve . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

CONSUMER INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Honda Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Distributor’s Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . 69

Emission Control System Warranty . . . . . . . . . . . . . . . . . . . 70

Customer Service Information . . . . . . . . . . . . . . . . . . . . . . . 73

INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

QUICK REFERENCE INFORMATION . . . . . . . . . . . . . . . . . . . . . . . 77

PUMP SAFETY

This chapter explains what you need to know to operate your diaphragm pump safely.

IMPORTANT SAFETY INFORMATION

Honda WDP20X and WDP30X pumps are not designed to pump drinking water. Pump only non-potable water, muddy water, and water containing solids. Other uses can result in injury to the operator or damage to the pump and other property.

Most accidents can be prevented if you follow all instructions in this manual and on the pump. The most common hazards are discussed below, along with the best way to protect yourself and others.

Operator Responsibility

It is the operator's responsibility to provide the necessary safeguards to protect people and property. Know how to stop the pump quickly in case of emergency. Understand the use of all controls and connections. For your safety and the safety of others, keep all shields in place when the engine is running.

Be sure that anyone who operates the pump receives proper instruction. Do not let children operate the pump. Keep children, pets, and bystanders away from the area of operation.

Pump Operation

Do not pump drinking water. Pumps are designed to only pump non-potable water, muddy water, and water containing solids. Pumping flammable liquids, such as gasoline or fuel oils, can result in a fire or explosion, causing serious injury. Pumping sea water, beverages, acids, chemical solutions, or any other liquid that promotes corrosion can damage the pump.

Operate the pump on a level surface. If the engine is tilted, fuel may spill.

Refuel With Care

Gasoline is extremely flammable, and gasoline vapor can explode. Refuel outdoors, in a well-ventilated area, with the engine stopped and the pump on a level surface. Do not overfill the fuel tank. Never smoke near gasoline, and keep other flames and sparks away. Always store gasoline in an approved container. Make sure that any spilled fuel has been wiped up before starting the engine.

PUMP SAFETY

Hot Exhaust

The muffler becomes very hot during operation and remains hot for a while after stopping the engine. Be careful not to touch the muffler while it is hot. Let the engine cool before transporting the pump or storing it indoors.

To prevent fire hazards, keep the pump at least 3 feet (1 meter) away from building walls and other equipment during operation. Do not place flammable objects close to the engine.

Carbon Monoxide Hazards

Exhaust gas contains poisonous carbon monoxide. Avoid inhalation of exhaust gas. Never run the engine in a closed garage or confined area.

PUMP SAFETY

SAFETY LABEL LOCATION

The label shown here contains important safety information. Please read it carefully. This label is considered a permanent part of your pump. So if the label comes off or becomes hard to read, contact your authorized Honda pump dealer for a replacement.

WARNING

DO NOT PUMP FLAMMABLE LIQUIDS. Pump can explode and you can

be seriously hurt or killed. Follow the Owner's Manual

instructions carefully.

CONTROLS

This chapter shows you the locations of controls and other important parts of your pump, and tells you how the controls work.

COMPONENT IDENTIFICATION

PUMP GREASE

FITING ACCESS PLUG THROTTLE LEVER

CHOKE LEVER

FUEL VALVE LEVER

SUCTION PORT

STARTER GRIP

DISCHARGE PORT

LIFTING BRACKET

AIR CUSHION CHAMBER CAP (priming filler cap)

STRAINER 2 inch – WDP20X 3 inch – WDP30X

OIL FILLER CAP/DIPSTICK

OIL DRAIN PLUG

IGNITION SWITCH

FUEL FILLER CAP

AIR CLEANER

FRAME

OIL DRAIN PLUG

CONTROLS

DESCRIPTION OF CONTROLS

You will use these controls every time you operate your diaphragm pump.

Throttle Lever

THROTTLE LEVER

The throttle lever controls the engine speed. Moving the throttle lever fully to the left gives maximum engine speed. Moving

IDLE

the throttle lever fully to the right returns the engine to idle speed.

FULL THROTTLE

The pump output can be controlled by adjusting the throttle lever to the desired position. At maximum throttle position, the pump will deliver the highest output volume. Moving the throttle toward the idle position will decrease the output volume of the pump.

Choke Lever

CHOKE LEVER

The choke is used to provide an enriched mixture when starting a cold engine. Move the choke to the CLOSED position when starting a cold engine. If the

OPEN

engine is warm, leave the choke in the OPEN position.

CLOSED

Fuel Valve Lever

The fuel valve lever is used to stop flow of fuel from the fuel tank to the carburetor. The fuel valve lever must be in the ON position to start and operate the engine. Turn the fuel valve lever to the OFF position when the pump is not in use.

FUEL VALVE LEVER

OFF

CONTROLS

WHEN OIL LEVELIS LOW ENGINE STOPS IMMEDIATELY

OIL ALERT

Ignition Switch

The ignition switch allows the operator to start and stop the engine.

OIL ALERT LABEL

OIL ALERT

WHEN OIL LEVEL IS LOW ENGINE STOPS IMMEDIATELY

OFF

Switch positions:

OFF: To stop the engine.

ON: To start and run the

engine.

IGNITION SWITCH

Oil Alert™ System

The Oil Alert system is designed to prevent engine damage caused by an insufficient amount of oil in the crankcase. Before the oil level in the crankcase can fall below a safe limit, the Oil Alert system will automatically shut down the engine (the ignition switch will remain in the ON position).

If the engine stops and will not restart, check the engine oil level (see page 29) before troubleshooting in other areas.

Recoil Starter.

To start the engine, pull the recoil starter grip lightly until resistance is felt, then pull briskly.

NOTICE

Do not allow the starter grip to snap back against the engine. Return the starter grip gently to prevent damage to the starter.

RECOIL STARTER GRIP

BEFORE OPERATION

This chapter tells you how to prepare your pump and yourself before you begin using the pump.

ARE YOU READY TO GET STARTED?

Your safety is your responsibility. A little time spent in preparation will significantly reduce your risk of injury.

Knowledge

Read and understand this manual. Know what the controls do and how to operate them.

Familiarize yourself with the pump and its operation before you begin pumping. Know what to do in case of emergencies.

Be sure of what you are pumping. This pump is designed to pump only non-potable water, muddy water, and water containing solids.

BEFORE OPERATION



IS YOUR PUMP READY TO GO?

For your safety, and to maximize the service life of your equipment, it is very important to take a few moments before you operate the pump to check its condition. Be sure to take care of any problem you find, or have your servicing dealer correct it, before you operate the pump.

WARNING

Improperly maintaining this pump, or failing to correct a problem before operation, could cause a malfunction in which you could be seriously injured.

Always perform a pre-operation inspection before each operation, and correct any problem.

Exhaust gas contains poisonous carbon monoxide. Avoid inhalation of exhaust gas. Never run the engine in a closed garage or confined area.

To prevent fire hazards, keep the pump at least 3 feet (1 meter) away from building walls and other equipment during operation. Do not place flammable objects close to the engine.

Before beginning your preoperation checks, be sure the pump is on a level surface and the ignition switch is in the OFF position.

Check the General Condition of the Pump

• Look around and underneath the pump for signs of oil or gasoline leaks.

• Remove any excessive dirt or debris, especially around the engine, muffler, and recoil starter.

• Look for signs of damage.

• Check that all nuts, bolts, screws, hose connectors and clamps are tightened.

• Keep all shields in place while operating the pump.

BEFORE OPERATION

Check the Suction and Discharge Hoses

• Check the general condition of the hoses. Be sure the hoses are in serviceable condition before connecting them to the pump. Remember that the suction hose must be of reinforced construction to prevent hose collapse.

• Check that the sealing washer in the suction hose connector is in good condition (see page 18).

• Check that the hose connectors and clamps are securely installed (see pages 18 & 19).

• Check that the strainer is in good condition and is installed on the suction hose (see page 18).

Check the Engine

• Check the oil level (see page 29). To avoid the inconvenience of an unexpected shutdown by the Oil Alert system, always check the engine oil level before startup.

• Check the air filter (see page 30). A dirty air filter will restrict air flow to the carburetor, reducing engine and pump performance.

• Check the fuel level (see page 35). Starting with a full tank will help to eliminate or reduce operating interruptions for refueling.

Remember, be sure to correct any problem you find, or have your servicing dealer correct it, before you operate the pump.

OPERATION

This chapter tells how to operate your pump safely and effectively.

Read this chapter completely before operating the pump. Take time to familiarize yourself with the controls and how they operate. The small amount of time spent in familiarization will reward you with greater efficiency and reduced risk.

SAFE OPERATING PRECAUTIONS

To safely realize the full potential of this pump, you need a complete understanding of its operation and a certain amount of practice with its controls.

Before operating the pump for the first time, please review the IMPORTANT SAFETY INFORMATION on page 6 and the chapter titled BEFORE OPERATION.

For your safety, avoid starting or operating the engine in an enclosed area, such as a garage. Your engine's exhaust contains poisonous carbon monoxide gas which can collect rapidly in an enclosed area and cause illness or death.

Do not pump drinking water. Pump only non-potable water, muddy water, and water containing solids. Pumping flammable liquids, such as gasoline or fuel oils, can result in a fire or explosion, causing serious injury. Pumping sea water, beverages, acids, chemical solutions, or any other liquid that promotes corrosion can damage the pump.

OPERATION

Due to the pump diaphragm reciprocating motion, pump assembly and hoses will move up and down and side-to-side during pumping. This may cause the pump to walk or move around while pumping. Depending on the surface conditions, pump hose length, and other factors, it may be necessary to anchor the pump to limit pump movement. During operation, observe pump movement and anchor the pump frame as necessary. To anchor the pump, attach anchored tie-down straps to the pump lift handles.

While pumping, the suction hose may move out of the pumping source and the discharge hose may move away from the pumping destination. It may also be necessary to anchor hose ends to prevent hose movement.

If there is no one to monitor the pump during operation, it is advisable to anchor the pump to prevent unexpected movement.

Pump total dynamic discharge head is 50 feet. Total dynamic discharge head includes static discharge head (discharge vertical height) and head loss due to friction. Head loss makes it impractical for the static discharge head to exceed 25 feet. Pumping to a static discharge head greater than 25 feet can damage the pump.

This diaphragm pump should never be run with the discharge output shut off or restricted.

NOTICE

Pump case failure may result if the discharge output is shut off or restricted. To avoid pump damage, do not restrict, shut off, or momentarily stop the fluid flow from the discharge hose.

A rigid pipe should never be used with a diaphragm pump. Flexible hoses must be attached to the pump. The suction hose must be noncollapsible. Never use hoses that are smaller than the suction or discharge fittings. Example: 2 inch pump requires a 2 inch inside diameter or greater hose and 3 inch pump requires a 3 inch inside diameter or greater hose. Using rigid pipes or hoses that are too small will cause severe damage to the diaphragm pump.

NOTICE

Due to pump movement during operation, connecting a rigid pipe to the pump will cause pump damage. Always use flexible suction and discharge hoses to prevent pump damage.

OPERATION

When water being pumped contains solids, the solids may get lodged under the clappet valves, which will prevent the clappet valves from closing completely. To maintain maximum pump performance, the discharge hose should angle upward as it exits the pump.

DISCHARGE HOSE

If the discharge hose must run across a roadway, the hose should cross the roadway perpendicular to traffic flow. Also, heavy boards should be placed next to the hose so the motor-vehicle weight does not shut off the discharge as vehicles cross over the hose. Driving over a discharge hose while the pump is running or even possibly when the pump is stopped will most likely cause pump case failure.

NOTICE

Collapsing the discharge hose will cause pump case and/or diaphragm damage. To prevent pump damage, take the necessary precautions to prevent the discharge hose from getting compressed or collapsed.

During freezing weather, always drain the pump case after use. If water is left in the pump case during freezing weather, the pump case will break.

OPERATION

PUMP PREPARATION

Suction Hose Connection

Use a commercially available hose, hose connector, and hose clamps. The hose must be the same size or larger than the suction port. To prevent the hose from collapsing, use a hose that is reinforced with a noncollapsible wall or braided wire construction. Keep the pump as close as possible to the pumping liquid. Avoid hose bends and sharp turns. Pump performance is best when the pump is not far above the liquid level and the hose is kept straight. Self-priming time is also proportional to the suction hose length. Using a longer suction hose will increase the self-priming time.

Tighten the hose connector to the suction hose with a hose clamp to prevent air leakage and loss of suction. Verify that the connector sealing washer is installed and in good condition. A loosely connected suction hose will reduce pump performance and self-priming ability.

SEALING WASHER

SUCTION HOSE (COMMERCIALLY AVAILABLE)

COUPLING

STRAINER (PROVIDED WITH THE PUMP)

HOSE CLAMP (COMMERCIALLY AVAILABLE)

DISCHARGE HOSE

The strainer provided with the pump should be attached to the end of the suction hose as shown.

Always install the strainer on the end of the suction hose before pumping. The strainer will prevent debris from entering the pump that can cause clogging, diaphragm and/or other pump damage.

OPERATION

Discharge Hose Connection

Use a commercially available hose, hose connector, and hose band. A short, large diameter hose will provide lower fluid friction and improve pump output. A long or small diameter hose will increase fluid friction and reduces pump output. Never use a hose size smaller than the discharge port diameter.

NOTICE

If a discharge hose is used that has a smaller inside diameter than the port size, the pump case may be damaged. To avoid pump damage, always use the correct size hose.

Tighten the hose clamp to prevent the hose from disconnecting under high pressure.

Pump Priming

Pump priming is not required if the vertical distance from water to the pump (suction head) is less than 14 feet on WDP20X or 16 feet for a WDP30X. The suction head can be increased to 21 feet for the WDP20X or 24 feet for the WDP30X by priming the pump.

To prime the pump, remove the air cushion chamber cap. Grasp the suction hose next to the suction fitting and lift the hose about 1 foot off the ground. Pour about 1 gallon of water into the pump case through the air cushion chamber. Lifting the suction hose will help to ensure the water goes into the pump housing and not out the suction hose. Lay the hose back on the ground, and reinstall the air cushion chamber cap.

PRIMING FILLER HOLE

SUCTION HOSE

AIR CUSHION CHAMBER CAP

WATER

OPERATION

STARTING THE ENGINE

1. Turn the fuel valve to the ON position.

2. Move the choke lever to the CLOSED position.

Do not use the choke if the engine is warm or the ambient temperature is high.

3. Turn the ignition switch to the ON position.

FUEL VALVE

CHOKE LEVER

CLOSED

IGNITION SWITCH

4. Move the throttle lever slightly to the left.

THROTTLE LEVER

5. Pull the starter grip lightly until

resistance is felt, then pull it briskly.

NOTICE

Return the starter grip slowly back to the engine to prevent damage to the starter.

OPERATION

STARTER GRIP

6. As the engine warms up,

gradually move the choke lever to the OPEN position.

7. Set the throttle at the desired

speed to produce the best pumping conditions.

The pump output can be controlled by adjusting the throttle lever to the desired position. At FULL throttle position, the pump will deliver the highest output volume. Moving the throttle toward the IDLE position will decrease the output volume of the pump.

CHOKE LEVER

OPEN

THROTTLE LEVER

IDLE

FULL

OPERATION

STOPPING THE ENGINE

Emergency

To stop the engine in an emergency, turn the ignition switch to the OFF position.

Normal

1. Move the throttle lever fully to the right to the IDLE position.

2. Turn the ignition switch to the OFF position.

IGNITION SWITCH

OFF

THROTTLE LEVER

IDLE

3. Turn the fuel valve to the OFF

FUEL VALVE

position.

4. If the pump is not going to be used again for the rest of the day, or is going to be stored for a long period of time, refer to page 51 for procedures on properly storing your pump.

OFF

5. After each use, drain the pump chamber and flush with fresh water.

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