Clarke PW50A Instruction Manual

OPERATION & MAINTENANCE

INSTRUCTIONS

ORIGINAL INSTRUCTIONS GC0819 - ISS 1

PETROL ENGINE DRIVEN 2” PUMP

MODEL NO: PW50A

PART NO: 7140651

Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com

INTRODUCTION

Thank you for purchasing this CLARKE Pump.

The PW50A petrol driven pump is designed for pumping clean water, or water

containing small solids in suspension. As the pump is fitted with an open

impeller the suction strainer supplied must always be used to ensure that large

stones or other objects cannot be drawn up, as this would cause severe

damage to the pump. It is NOT designed for pumping slurry, sludge, mud or

heavily polluted water, or any water containing chemicals or other acidic

contaminants including salt water. This pump has the ability to pump solids in

suspension no larger than 4 mm.

Before attempting to use this product, please read this manual thoroughly and

follow the instructions carefully. In doing so you will ensure the safety of yourself

and that of others around you, and you can look forward to your purchase

giving you long and satisfactory service.

SAFETY PRECAUTIONS

SAFETY WHEN USING YOUR PUMP

1. Thoroughly familiarise yourself with the pump & its operation and follow all

instructions in this manual.

2. ALWAYS ensure that the pump is properly positioned to prevent it moving

during operation and that the immediate area surrounding the pump is

kept clear.

3. ALWAYS ensure the pump cannot be started inadvertently by using the ON/

OFF switch whenever carrying out maintenance or making adjustments.

4. ALWAYS use a strainer on the suction hose to prevent stones and other

solids from being drawn up, which could severely damage the pump.

5. ALWAYS keep the pump dry and well clear of water discharge

6. ALWAYS use at least 300 mm of flexible hose to make pipe connections to

the pump. Rigid piping may put stress on the pump causing damage. If

rigid piping is used, it should be supported so as to eliminate stress.

7. ALWAYS observe all safety precautions for the handling of fuel.

CAUTION: AS WITH ALL MACHINERY, THERE ARE CERTAIN HAZARDS

INVOLVED WITH THE OPERATION AND USE OF THIS WATER PUMP.

EXERCISING CAUTION WILL REDUCE THE RISK OF PERSONAL INJURY.

Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com

8. ALWAYS use in a well ventilated area.

9. NEVER refuel the engine whilst it is running and allow the engine to cool

sufficiently before refuelling.

10. NEVER use for pumping petrol (or other flammable liquids) or corrosive

chemicals. This pump is designed to pump water only.

11. NEVER operate an engine driven pump in an explosive atmosphere, near

combustible materials, or where there is insufficient ventilation.

12. NEVER run the pump dry. Always fill the pump with water before starting.

13. NEVER attempt any major repairs to this product unless you are qualified.

14. NEVER direct the discharge flow towards another person.

15. NEVER direct the water discharge towards electrical wiring or equipment.

16. NEVER use indoors or in a confined space.

17. NEVER over-tighten drain or filler plugs. Excessive force may damage the

threads or the pump body.

18. ALWAYS use only original CLARKE replacement parts. The use of non-

standard parts could be hazardous.

19. ALWAYS check for any damage or any condition that could affect the

operation of the pump. Damaged parts should be properly repaired.

20. Have your pump repaired by a qualified person. Repairs should only be

carried out by qualified persons using original spare parts, otherwise this

may result in considerable danger to the user.

GENERAL SAFETY IN THE WORKPLACE

1. ALWAYS keep work area clean & tidy. Cluttered work areas invite

accidents.

2. NEVER over-reach. Keep proper footing and balance at all times.

3. Keep other persons away. Do not let persons, especially children, touch

the pump and keep them away from the work area.

4. ALWAYS ensure the workplace is well lit. Ensure that lighting is placed so that

you will not be working in your own shadow.

5. Dress properly. Loose clothing or other jewellery may get caught in moving

parts. Non-slip footwear is recommended. Wear protective hair covering to

contain long hair.

6. ALWAYS wear safety glasses. (Everyday glasses are not safety glasses).

Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com

OVERVIEW

1 Inlet Strainer/filter 12 Suction Chamber Drain Plug

2 Inlet Adaptor/locking ring with O-ring 13 Plug spanner/tommy bar

3 Water Filler Plug 14 Fuel Shut-off Valve

4 Outlet Adaptor/locking ring with O-ring 15 Choke Lever

5 Fuel Filler Cap 16 Throttle Lever

6 Air Filter Housing 17 Starter Recoil

7 Carburetor Drain Plug 18 ON/OFF Switch

8 Spark Plug 19 Oil Drain Plug

9 Suction Chamber Bolt 20 Oil Filler and Dipstick

10 Inlet or Suction Chamber 21 Rubber feet/fixings

11 Hose Securing Clips

Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com

BEFORE USE

FITTING THE FEET

1. Fit the 4 x rubber feet to the frame

using the nuts and washers

supplied.

FILLING WITH OIL

This pump is not supplied containing

engine oil or fuel. Use an engine oil of

SAE 15-40 rating unless operating at

very high or low ambient

temperatures.

To fill the engine crankcase with oil:

1. Remove the filler plug/dipstick.

2. Fill the unit with oil until visible

inside.

3. Check the level by inserting the

dipstick back into the filler tube

and checking the level is within

the indicated range. If correct

replace the dipstick/filler cap

Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com

.FILLING WITH FUEL

• Use unleaded petrol.

1. Open the fuel cap and top up as

required. Located within the fuel

tank is a filter. Check this filter

periodically and remove any

contaminants which may have

accumulated. Do not fill above

the fuel filter shoulder.

2. After refuelling, tighten the fuel

filler cap securely.

INSTALLING THE PUMP

1. Position the pump on a firm foundation and as near to the water source as

possible.

2. Connect the suction and

discharge hoses to the pump

using the hose clamps and sealing

rings supplied, to achieve an

airtight seal.

• There must be no damage to

the hoses which must be

adequately protected and

supported.

NOTE: Hoses or pipes should be

supported independently

and not carried by the

pump.

WARNING: WIPE UP ANY SPILT FUEL BEFORE RUNNING THE PUMP.

ALLOW THE ENGINE TO COOL DOWN BEFORE REFUELLING

Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com

IMPORTANT: An air leak in the suction line will prevent priming, and reduce

the performance of the pump.

3. Pay particular attention to the following:

• Always ensure the hose adaptor sealing ring is in place and correctly

fitted.

• Always use a flexible hose at the pump body connection of at least

1ft (300 mm) length.

• Keep all pipes/hoses as short and straight as possible and avoid

sharp bends. If a flexible hose must be laid across a roadway,

protect it with planking.

• Ensure there is adequate drainage for the discharged water, and

that there is no danger of damage to property as a result of the

pumping activity.

NOTE: Instantaneous shut off pressure, applied when a vehicle runs

across an unprotected hose, will cause “hydraulic shock”, which

can damage the pump and/or the hose.

4. Attach the inlet strainer to the end

of suction hose using a further

hose clamp, to prevent large

stones etc, from being drawn up

which could cause severe

damage. Keep the strainer free of

debris.

5. If it is likely to clog with dirt or

debris, proceed by either:

• preparing a bed of stones on

which to rest the strainer.

• tying the strainer so that it stays off the bottom of the pit, pond or

excavation.

• rest the strainer inside a basket or bucket to keep undue debris

away.

Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com

6. Prime the pump with water by

removing the filler plug on top of

the pump and filling with water,

leaving no air gap.

• The pump is self-priming only

when the pump is filled. It will

prime and re-prime itself

without refilling. Refilling is

necessary only if the pump has

been drained.

7. Never allow the pump to run dry.

8. If the discharge hose runs

vertically more than 30ft a check

valve should be installed in the

discharge hose near the pump to

stop water hammer when the

pump is shut down.

• It is the pump owners

responsibility to supply and

install a check valve to protect

the pump in this way.

9. Properly fuelled and lubricated, the pump will run without further attention.

OPERATION

Ensure the site and pump are prepared with the pump primed with water to

avoid any possibility of dry running, then proceed as follows:

STARTING

• Note the markings displayed on the engine parts, for the following

choke and throttle settings.

WARNING: WHEN THE ENGINE IS RUNNING THE EXHAUST MUFFLER

IS VERY HOT. TAKE CARE TO AVOID BURNS. NEVER RUN THE ENGINE

IN AN ENCLOSED SPACE - ENSURE THERE IS ADEQUATE

VENTILATION.

Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com

1. Set the engine On/Off switch to

On.

2. Move the fuel valve to the right

side (open position).

3. Pull the starter recoil rope slowly

two or three times to allow fuel to

reach the carburetor.

• The direction of operation is

marked on the machine.

4. To start a cold engine, set the

choke lever to the left (closed

position), but if the engine is

already warm, the choke should

be in the open position to the

right.

5. Set the throttle about one third

open.

6. Pull the recoil starter rope firmly

until the engine starts. Do not

snatch at the starter rope and allow it to recoil slowly after each pull.

7. Once the engine starts, gradually return the choke to the open position as

the engine warms up and use the engine throttle to gradually increase

engine speed.

CONTROL DURING OPERATION

After starting the engine, move the throttle to the open position for priming of

the pump and checking for pump output. Output is controlled by adjusting

the engine speed.

The pump should begin discharging liquid in a few moments. To further reduce

priming time, the engine speed may be increased after the engine is properly

run in. If pumping does not start within this time, shut off engine and check

carefully to find the problem. See TROUBLESHOOTING.

NOTE: Filling the suction pipe with water will speed up the priming

process, and it is recommended that a non-return valve be fitted

to the end of the suction pipe.

On higher vertical lifts, a higher engine speed is necessary but on shallow lifts

or when there is little water to pump, preserve fuel and engine wear by

reducing engine speed.

In the event of blockages, where debris has entered the suction chamber, the

suction chamber can be opened and cleaned out by removing the bolts (12)

shown in the layout on page 18.

Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com

SHUTTING DOWN

1. Reduce engine speed to minimum using the throttle lever.

2. Stop the engine by switching OFF the ignition switch.

3. Close the fuel valve.

MAINTENANCE

1. Always maintain the pump in a clean condition, checking regularly for

loose bolts etc.

2. Clean the air filter once every 50 hours of use (or more often in unusually

dusty conditions) as follows.

3. Unscrew the wingnut and lift off the air filter assembly from the engine.

4. Remove the components shown

and clean the foam filter element

with a high flashpoint solvent.

Squeeze dry, then dip in clean

engine oil and squeeze oil excess

oil.

• Never operate the pump

without the air cleaner installed

as this would cause premature

wear to the engine.

5. Replace the spark plug after the

first month or every 50 hours of

use.

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