RocwooD RWHPPW4 User manual

HIGH POWER
PRESSURE WASHER
RocwooD
Instruction Manual
NOTE: PLEASE READ INSTRUCTIONS CAREFULLY BEFORE USE.
RWHPPW4 &
RWHPPW4ES

• Read instructions carefully before operating this product.
• Keep bystanders away.
• This product is for outdoor use only.
• Ensure the engine is stopped before carrying out adjustments, cleaning or maintenance.
• Always turn o the engine and water supply when nished.
• Do not use the product if found to be damaged.
• Only use with detergents specied by the manufacturer. Other chemicals may compromise the safety of the product.
• Do not direct the pressure jet towards mechanical parts containing lubricant grease.
• Clean vehicle tyres from a minimum of 50cm to avoid damage by the high pressure jet.
• Do not point high pressure jets at people, animals, live electrical parts or the product itself.
• Do not use accessories such as hoses and connections that are not advised by the manufacturer.
• Engage the high pressure safety catch located on the gun when not in use.
• Do not step/stand on the high pressure hose.
• Ensure the nozzle is securely attached before using the Product. High pressure can cause it to be red from the lance with
considerable force, and could cause injury & damage.
• Be ready for the kick-back force and the sudden torque on the spray assembly when operating the trigger.
• A high pressure jet can remove paint and other surface nishes. It can also damage tarmac and grouting.
• Switch o completely when not attended.
• The hose is designed specically for operation with high pressures. Take care to avoid damage that may prevent correct
operation of the product.
• This product is not to be used by children or anyone with reduced capabilities.
• Always completely unwind the high pressure hose prior to operation.
• Make sure that the machine is switched o before unwinding the high pressure hose, and take care not to pull the
machine over.
• Do not let the high pressure hose contact the hot engine exhaust.
• Do not use this product indoors.
• Keep exhaust emissions away from air intakes.
Explanation of the symbols on the appliance!
GENERAL INSTRUCTIONS
WARNING ! Read all the operating instructions
before use!
WARNING! Do not inhale exhaust fumes!
ATTENTION! Hot surfaces! Risk of burns!
Wear protective gloves!
Wear safety shoes!
Wear hearing protection
Wear safety goggles!
High-pressure jets can be dangerous if misused. Do not aim
at people, animals, active electrical equipment or at the
appliance itself .
Regulate engine speed!
Choke:open/close,petrol: on/o
TECHNICAL PARAMETERS:
MODEL: ............................................................RWHPPW4
ENGINE: ............................................................4-STROKE OHV ENGINE
OUTPUT: ..........................................................8HP (5.25 KW)/3600 RPM
DISPLACEMENT: ..........................................196CC
MAXIMUM PRESSURE:...............................3950 PSI (272 BAR)
CONTINUOUS PRESSURE: .......................3000 PSI (207 BAR)
RATED FLOW: ................................................8.5L/MIN
MAX FLOW: ....................................................10L/MIN
MAX WATER TEMPERATURE: ..................60°C

• Do not attempt to modify the product in any way.
• To ensure good operating condition arrange regular servicing from an authorised agent.
• Only use replacement parts supplied by the manufacturer
• Only use fresh,clean and good quality fuel in the engine.
• Never operate the engine without oil.
• Never refuel in close proximity to naked ames, sparks or other sources of ignition e.g. cigarettes.
• Do not refuel when the engine is hot.
• Wipe up and correctly dispose of any fuel spillage immediately with a suitable medium.
• Move away from the refuelling areas before restarting the engine. Store fuel for short periods only in a suitable container
away from heat and direct sunlight.
• Clean the pressure washer thoroughly after each use.
• Regularly check external nuts and xings to ensure vibration caused by normal use has not to begun loosen them
• Remove the spark plug ignition lead from the back of the spark plug and position the lead to avoid accidental
reconnection.
• Store the machine in a secure dry location out of reach of children.
• Empty the fuel tank before storage.
MAINTENANCE AND STORAGE
GETTING TO KNOW YOUR PETROL PRESSURE WASHER
1. Engine 2. Pump 3. Lower Frame
4. Top Handle 5. Frame feet 6. Panel
7. Wheel 8. Soap tank 9. Lance
10. Hand spray gun 11. Nozzle 12. Hose
10
11
9
8
5
4
12
6
1
3
7
2

FIG. 1
ASSEMBLYINSTRUCTIONS
NOTE: Every machine is tested during production, so there may a few drops of water inside the pump assembly
Locate the frame feet on to the
lower frame and secureusing
the nuts and bolts provided
Locatethe panel on to
the upper frame and
secure using the nuts
and bolts provided
TO ASSEMBLE THE WHEELS
(Figs. 2-3):
Ensure the appliance is kept in the
upright position. Insert the axle bar
into the axle support tube on the
lower frame, locate the axle bar with
the locating pin
Fit a wheel to the axle and
secure using the locking nut
provided. Repeat this process
for each wheel.
The upper handle can only be
located in one way.
Insert the upper handle into the
uprights of the lower base and
secure in place using the nuts
and securing dials provided.
WARNING:
The engine is not provided with oil. It is necessary to 
ll the unit before starting the engine.
ENGINE OIL (FIG. 7):
WARNING:
The engine is not provided with oil. It is necessary to lltheunit
before starting the engine.The engine has twooil ll points at
the front and back of the engine. Remove the desired cap and ll
with the engine oil speci ed to the upper level mark. Replace the
oil ller cap.
ENGINE REQUIRES
FILLING WITH OIL
BEFORE FIRST USE.
FIG. 5
FIG. 6 FIG. 7
FIG. 4
FIG. 2 FIG. 3

HIGH PRESSURE
CONNECTION
(Figs. 8 - 9):
Connect the high pressure
hose A to the units high
pressure outlet.
INSERTING A NOZZLE
(Fig 10):
To insert a nozzle, pull back
the locking collar at the end
of the lance, insert nozzle
and release the collar. This
will lock the nozzle in place.
Ensure the nozzle is inserted
correctly. If not it can yo ut
and injure personnel or
damage property.
CONNECTING THE HOSE
(Fig 11):
Connect the hose to the wa-
ter inlet connector (Max 20PSI
Max Tempreture 60C) and
turn on the water completely
Connect the high pressure
hose to the trigger B. Insert
the lance C into the trigger.
Press firmly against the spring
tension and twist
the coupling into the locked
position. Insert the required
nozzle by retracting the
coupling at the end of the
lance, ensure the nozzle is
inserted securely
WARNING: The engine is not lled with oil. It is necessary to ll the unit before starting the
engine. The engine will not produce a spark unless sucient oil is inside.
CAUTION: Do not run the engine with high or low oil level as this can cause engine damage.
CAUTION: Only use unleaded gasoline.
CAUTION: Avoid damaging your hose by ensuring it does not touch the hot exhaust during
and after use.
CAUTION: Avoid damaging your pump by ensuring the water supply is clean and free of any
foreign objects.
CAUTION: Inlet water temperature must not exceed 60 C and 20PSI .
CAUTION: Never let the appliance operate for more than 2 minutes with the spray gun in the
closed position.
CAUTION: Never operate the pressure washer with repeated and rapid on and o movements
of the trigger
FIG. 8FIG. 9
FIG. 11
FIG. 10

WATER SUPPLY FROM THE WATER MAIN
• Connect a water supply hose (not supplied) to the water inlet connection of the pressure washer.
• Turn on the water supply and pull the trigger until water is continually owing out of the nozzle.
WATER SUPPLIER FROM A CONTAINER
• Unscrew the coupling part for the water inlet.
• Screw the suction hose with lter onto the water connection of the unit.
• Hang the lter in the container.
• Vent the unit before operation.
• Unscrew the high pressure line at the high pressure outlet of the unit.
• Switch on the unit and let it run until water is free of bubbles at the high pressure outlet.
• Switch o the unit and screw on the high pressure hose again.
Pull the trigger to eliminate trapped
air and wait for a steady ow of
water to emerge from the spray nozzle.
NOTE:
In order to assist the rst startup it is
recommended to press the trigger
during the pulling of the starter handle.
To prevent accidental operation the
trigger is tted with a locking facility.
FIG. 12FIG. 13

STARTING THE ENGINE
(FIG. 14-17):
Push the fuel lever A to the
right (On position).
Push the choke lever B to the
left; closing the choke for initial
start-up.
NOTE: Do not use the choke
if the engine or air tempreture
is warm.
Turn the engine switch
clockwise to the ON position.
ELECTRIC START RWPPW4ES
If the engine fails to start within 5 seconds release the switch and wait at least 10 seconds before
trying again. Running the starter for more than 5 seconds at a time will overheat the starter motor
causing damage that is not covered in the warranty.
ENGINE SWITCH
OFF ON START OFF ON START
Switch from ‘OFF’ position to ‘START’
until engine res.MAX5seconds*.
1Once running allow switch to return
to ‘ON’position.
2
CONVENTIONAL PULL START RWPPW4
FIG. 14FIG. 15FIG. 16

Let the engine idle for a short
while topreheat before
pushing the choke lever C to
the right.
When the applianceis in
operation, the speed can be
adjusted by moving the
throttle
Dcontrol lever to the high
position (indicated by a hare).
NOTE: Thereis astop bracket
on the throttle control lever,
do not force this bracket as it
can damage the engine.
STOPPING THE ENGINE
(Fig 20-21):
In an emergency turn the engine switch
anticlockwise to the OFF position to stall
the engine.Tostop the appliance normally
use the following sequence.
Turn the engine switch
anticlockwise tothe OFF
position. Then slide the fuel
lever E to the left; OFF
position.
C
FIG. 17 FIG. 18 FIG. 19
Pull the black starting rope
handle gradually until you
feel resistance; then make a
rapid pull.
NOTE: Return the starting
rope handle gently to prevent
damage to the starter
assembly.
Do not pull the rope all the
way out as this can damage
the starter assembly.
FIG. 20FIG. 21
ADJUSTING THE SPRAY PATTERN (Fig.22)
You have the choice of 4 dierent colour coded nozzles giving you dierent spray patterns to choose
from:
0° nozzle (Red):This nozzle delivers apinpoint stream and is extremely powerful. It covers avery small
area of cleaning.This nozzle should only be used on surface that can withstand this high pressure
such as metal or concrete. Do not use on wood.
15°nozzle (Yellow):This nozzle delivers apowerful 5degree spray pattern for
intense cleaning of small areas.This nozzle should only be used on areas that FIG. 22
can withstand the high pressure from this nozzle.
40°nozzle (White):This nozzle delivers a40 degree spray pattern and aless
powerful stream of water. It covers awide area of cleaning.This nozzle should
be used for most general cleaning jobs.
Low pressure nozzle (Black):This nozzle is used to apply chemicals or
cleaning solutions. It has the least power stream.
CAUTION: When you have

nished working turn o
the
engine. When the machine is
switched o
,alwaysdischarge
the pressure by pressing the
trigger.

NOTE:
Before using the pressure washer to clean patio paving slabs it is advisable to test a small area first,
some paving slabs are manufactured from inferior materials and the use of a pressure washer could
damage the surface.
USING THE DETERGENT FACILITY (Fig. 23)
Fill asuitable container with pressurewasher detergent. Do not use washing up liquid as it contains salt. We
recommend the use of good quality pressure washer detergent for use with this pressure washer. Please follow the
instructions on the container. Most automobile detergents are acombination of adetergent and awax solution.
The viscosity (thickness) of the detergent will increase in cold weather. It is recommended that this type of
detergent is diluted with water beforefilling the container.When using combination wash and wax solutions we
recommend that they are diluted before use. As ageneral guide we would recommend adilution rate of 50/50.
However atrial and error process would determine the ideal dilution rate for aparticular detergent.
NOTES:
Athick viscous detergent would not flow freely from the detergent tank and the residue will cause ablockage
in the system. After using the detergent facilityit should be flushed thoroughly using copious amount of water.To
activate detergent delivery, fit the Black LOW PRESSURE nozzle to the and of the lance. Submerge the and of
the detergent pick up pipe into your container of pressure washer detergent. Suction and mixing will occur
automatically as the water flows though the pump.
CLEARING A BLOCKAGE (Fig. 24)
If at anytime the ow ratestutters or is inconsistent, release the trigger and switch OFF the machine.
Squeeze the trigger to relieve any pressure and check the jet in the end of the lance for any blockage.
If a blockage is suspected use some wire to clean the inside of the nozzle.
SAFETY INSTRUCTIONS FOR THE ENGINE
1. Before operating the engine, be sure to read all instructions carefully as injury or permanent damage
to equipment may occur.
2. Run the engine in awell ventilated area.
3. Ensurethe appliance is at least one metre away from building walls or other equipment.
4. Keep the appliance away from ammable liquids such as petrol.
5. Refuel in a well ventilated area with the engine switched o and avoid sparks or naked ames.
6. When refuelling ensure that you do not overll the fuel tank.
7. If any fuel is spilled ensure it is deaned up thoroughly before restarting.
8. Ensure the fuel cap Is located securely.
9. The exhaust muers get very hot and will remain hot for sometime after the engine is switched o.
10. Ensure the appliance is cooled before transporting or storing.
FIG. 23FIG. 24

PRE-OPERATION INSPECTION
CAUTION:
Engine oil is a key factor in deciding the engine’ s performance. Do not use engine oil with additives
or 2-stroke gasoline engine oil, as they do not have enough lubricating properties, which may shorten
the engine’ s service life.
1. Check the engine is on level ground.
2. 15W-30 is recommended for general all temperature use.
3. Remove the dipstick and clean it.
4. Reinsert the dipstick into the oil ller without screwing it in and check the oil level.
5. If the oil level is too low add the required amount of engine oil to the oil ller mark.
6. Replace the dipstick securely.
CAUTION:
Running with insucient engine oil may damage the engine severely.
FIG. 25

FUEL AND FUEL TANK:
Only use unleaded petrol or fuel. Using unleaded petrol or fuel will decrease the possibility of producing carbon
deposits and prolong the engines service life. Never use old or polluted petrol or fuel or a mixture of petrol and
engine oil. Make sure the fuel is free of dirt and water.
CAUTION:
Handle fuel with care because it can damage plastic and painted surfaces. Remove the fuel ller cap and check
the fuel level. If the fuel level is too low, refuel the tank.Remember when adding fuel do not ll over the fuel
lter shoulder.
WARNING:
Petrol is extremely ammable and is explosive under certain conditions. Refuel in awell ventilated area with the
engine stopped. Do not smoke or allowames and sparks in the area where petrol is stored or where the fuel
tank is refuelled. After refuelling make sure the fuel cap is returned securely
.Be careful not to spill fuel when
refuelling. Spilled fuel or fuel vapour may ignite. If any fuel is spilled make sure the area is dry before starting
the engine.
FUEL TANK FILTER (Fig.26):
After every 150 hours of running or every three months the fuel tank lter should be removed and cleaned.
Remove the fuel tank ller cap and the lter,clean the 
lter thoroughly using environmentally friendly water
based degreasing agent and ret
..
OIL LEVEL SWITCH:
The engine oil alarm is designed to prevent the operator starting the engine when the oil in the crankcase is
insu icient. Running with insu
cient oil will damage the engine. Once the oil level in the crankcase is too
low, the engine oil alarm will stall the engine automatically to avoid damage while the engine switch is still ON.
AIR FILTER (Fig.27):
After every 100 hours of running or everymonth, the air lter should be removed and examined for deterioration
and cleaned.Clean the air lter thoroughly using environmentally friendly water based degreasing agent. Allow
to dry fully then replacethe air lter. Never run the engine without the air lter tted.
STORAGE:
If the engine is not to be used or is to be stored for more than one month the following storage procedure should
be carried out.
1. Drain all the fuel from the fuel tank and the carburettor ensure that all the fuel has been removed.
2. Remove the spark plug and pour approximately one tablespoon full of clean engine oil into the spark plug
hole.
3. With the ignition turned OFF gently pull on the recoil starter cord several times.
4. Ret the spark plug and continue to pull the recoil starter cord until the piston is on the compression stroke
(when resistance is felt) then stop pulling.
5. Store the pressure washer in adry well ventilated place under acover to prevent any dust or debris from
accumulating on the pressure washer.
WINTER AND LONG TERM STORAGE:
If the pressure washer is not to be used for more than 3 months or if there is a danger of ice or frost during winter
months the pump unit will require protection to prevent seizing and damage caused by freezing.
FIG. 26FIG. 27

EXHAUST CONTROL SYSTEM
With the engine running, carbon monoxide, nitrogen oxide and hydrocarbon are produced, and in certain
conditions nitrogen oxide and hydrocarbon will react together tomake smoke while carbon monoxide is toxic,
so exhaust control is very important. The manufacturer decreases exhaust emissions by introducing poor fuel
carburettors and other devices to solve the problem. To keep the exhaust of your engine within the standard
exhaust emission values, pay attention to the following:
MAINTENANCE
Maintain the engine periodically in accordance with the maintenance schedule. The maintenance schedule is
made out on the basis of normal use in normal conditions. If using under heavy load, dusty or wet conditions
or in high temperature, more frequent maintenance will be necessary.
REPLACEMENT OF PARTS
We recommend that you use parts that are supplied by the manufacturer or equivalent quality parts.
Replacement parts of inferior quality may impair the eectiveness of the exhaust control system.
MODIFYING
Modifying the exhaust control system may make exhaust emissions exceed statutory limits. Illegal
modications are:
1. Dismantling or modifying any part of the air inlet or outlet system.
2. Modifying or removing speed adjustment controls or connections which may result in the engine running
outside its set parameters.
PROBLEMS AFFECTING EXHAUST EMISSIONS
1. Diculty in starting or stopping.
2. Erratic idling.
3. Giving o black smoke or excessive fuel consumption.
4. Poor ignition spark or no spark.
5. Ignition too advanced. If you have any of these above problems please contact your dealer.
CAUTION:
Before carrying out any maintenance to the machine release any
pressure and remove the water connection.
WATER SUCTION FILTER CHECKING
Check periodically in order to avoid deposits clogging it.
SPARK PLUG MAINTENANCE
After every 50 hours clean the spark plug with a brush. If the insulator on the spark plug is damaged replace
it immediately. Check the spark plug gap with a feeler gauge, the gap should be 0.7 - 0.8mm. If adjustment is
necessary bend the side electrode carefully. Check the spark plug gasket is in good condition or replace with
a new one. Screw in the spark plug to the bottom rst by hand and then tighten by using a spark plug wrench.
If a new spark plug is used, twist a 1/2 more turn after impacting the gasket. If using the original one twist
1/8 -1/4 more turn.
CAUTION:
The spark plug eliminator should be serviced at least once every 100 hours of operation so as to keep it in
good condition.
WARNING:
The muer is very hot during running the engine and for a prolonged period after stopping. Only service after
the engine cools down completely.
Unscrew two nuts and remove the exhaust elbow from the engine body.
Unscrew ve screws from the muer guard and take it out.
Unscrew from the spark plug eliminator and separate from the muer.
Clean the spark eliminator mesh with a wire brush.
Reinstall the spark eliminator in reverse order of removal.
CAUTION:
Be careful not to damage the spark eliminator. Never use a damaged spark eliminator.
CARBURETTOR IDLING ADJUSTMENT:
Start and pre-heat the engine until it reaches normal working temperature. Obtain standard idling by adjusting
the throttle xing screw under the engine, Standard idling: 3400±300rpm.

TRANSPORT
Transport with the fuel switch in the o position. Ensure the engine is cooled so as to avoid the risk of
burns or re.
CAUTION:
Do not tilt the engine to avoid spilling fuel. Spilled fuel or fuel vapour may ignite.
STORAGE
If the engine is not to be used for a long period of time ensure it is stored correctly. Make sure the storage
area is dry and free of dust.
PREPARE FOR STORAGE
Disconnect the spark plug. Put a spoonful of fresh engine oil into the cylinder and rotate the engine to
distribute the oil evenly. Replace the spark plug. Pull the starting rope until you feel resistance and then
keep pulling so as to align the arrow of the starting sleeve with the hole of the starter: This will close both
the inlet and outlet valves to help prevent the engine rusting inside. Cover the engine to keep it free of dust.
REMOVAL FROM STORAGE
Before re-using, service the engine in accordance with the instructions in the following table.
1. Unscrew the drain plug and drain out the fuel in the carburettor:
2. Turn o the engine switch rst, disconnect the deposit cup and empty it.
NOTE:
Do not dump oil containers or discarded engine oil into the ground. For environmental protection take
discarded engine oil in a closed container to a recycling station.
WARNING:
Fuel is extremely ammable and explosive under certain conditions. Keep cigarettes, naked ames and
sparks away from operating site.

To keep the engine in sound condition, the user should maintain it according to the table below.
CAUTION:
Use parts that are supplied by the manufacturer, otherwise damage to the engine may occur.
WARNING:
Stop the engine before servicing. If servicing is required with the engine running ensure there is good ventilation
in the area. Exhaust emissions contain toxic carbon monoxide which may cause injury or be fatal if inhaled.
ENGINE OIL REPLACEMENT
Place the machine on a level surface and warm up the engine for several minutes. Then stop the engine.
Remove the oil ller cap
Place an oil pan under the engine. Remove the oil drain plug so that the oil can be completely drained. You will
need to use a tube or other similar device to prevent the oil leaking onto the frame of the pressure washer.
Check the oil drain plug, gasket oil 
ller cap and O-ring and if damaged replace.
Reinstall the oil drain plug.
Add engine oil up to the upper level of the dipstick.
NOTE:
Do not dump oil containers or discard engine oil intorubbish bins or intothe ground. For environmental
protection take discarded engine oil in a closed container toa recycling station.
NOTES:
* Only for inside ventilating double-core carburettors.
**Only for paper core air cleaners.
1. More often than in schedule if used in dusty conditions
2. Items to be done by dealer unless you are fully trained and equipped to do so.

ECDECLARATIONOFCONFORMITY


We SDG TRADING LTD of Rocwood House, Lightwood Green Industrial Estate, Overton-on-Dee,
Wrexham, LL13 0HU (importer) declares that the product:

Designation:PetrolHighPressureWasher
Model(s):RWHPPW4,RWHPPW4ES

COMPLIESWITHTHEPROVISIONSOFTHEFOLLOWINGEUROPEANDIRECTIVES:
2006/42/ECMACHINERYDIRECTIVE
2014/30/EUEMCDIRECTIVE

‐‐
COMPLIESWITHTHEPROVISIONSOFTHEFOLLOWINGHARMONIZEDSTANDARDS:
EN60335‐2‐79:2012
EN55012:2007+A1
EN61000‐6‐1:2007
‐‐
NotifiedBody:TÜVRheinlandLGAProductsGmbH
Address:Tillystraße2,90431Nürnberg,Germany

Authorisedsignatoryandtechnicalfileholder
Date:10/01/2022
Signed:


DaleGriffiths
ManagingDirector

Nameandaddressofthemanufacturer:
Company:SDGTradingLtd.
Address:RocwoodHouse
LightwoodGreenIndustrialEstate
Overton‐on‐Dee,
Wrexham,
LL130HU


