Jefferson Professional Tools & Equipment 6.5HP User manual

User Manual
v.2.1
12.6 L/min Flow Rate • 2700psi / 185 Bar Rated Pressure
GEARBOX PETROL WASHER
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3
USER MANUAL v2.1
JEFWASPGRO65HP
6.5HP Gearbox Petrol Washer
www.jeffersontools.com
CONTENTS
Contents / About This Document 3
Specications 4
Equipment Identication 4
Safety Guidelines 5
Unpacking & Assembly 7
Equipment Setup 9
Safe Working Environment 10
Startup Procedure 10
Stopping The Pressure Washer 12
Spray Nozzles 12
Adjusting Spray Pressure 13
Using Chemicals & Detergents 13
Maintenance 14
Storage 17
Troubleshooting 18
Pressure Washer Main Assembly - Parts List & Diagram 20
Pump - Parts List & Diagram 21
Gear Box - Parts List & Diagram 22
Engine - Cylinder Head - Parts List & Diagram 23
Engine - Crank Case - Parts List & Diagram 23
Engine - Crank Case Cover - Parts List & Diagram 23
Engine - Crankshaft / Piston - Parts List & Diagram 24
Engine - Gas Distribution Adjustment - Parts List & Diagram 24
Engine - Crank Case Cover - Parts List & Diagram 24
Engine - Diversion Assembly - Parts List & Diagram 25
Engine - Carburetor - Parts List & Diagram 25
Engine - Flywheel/Coil Assembly - Parts List & Diagram 25
Engine - Crank Case Cover - Parts List & Diagram 25
Engine - Air Filter - Parts List & Diagram 26
Engine - Mufer - Parts List & Diagram 26
Engine - Fuel Tank - Parts List & Diagram 26
Pressure Washing Tips & Techniques 27
Limited Warranty Statement 28
EC Declaration Of Conformity 30
ABOUT THIS DOCUMENT
This manual has been compiled by Jefferson Tools and is an integrated part of the product with which it's enclosed and should be kept with it for
future reference. Please read all of the information supplied in this User Manual before operating this product. This manual describes the purpose
for which the product has been designed and contains all the necessary information to ensure its correct and safe use. We recommend that you
read the information supplied before carrying out any maintenance or repair. By following all the general safety instructions contained in this
manual you will help to ensure operator safety and extend the potential life span of the equipment.
All photographs and drawings in this manual are supplied by Jefferson Tools to help illustrate the operation of the product. Whilst every effort
has been made to ensure accuracy of information contained in this manual our policy of continuous improvement determines the right to make
modifications without prior warning. The information contained in this Instruction Manual is designed to assist you in the safe operation and
maintenance of the pressure washer. Some illustrations in this Instruction Manual may show details or attachments that differ from those on
your own model. Contact your nearest Jefferson Dealer if you are unsure about any information included in this manual or require any additional
information about the safe use, operation maintenance, or repair of this equipment.

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USER MANUAL v2.1
JEFWASPGRO65HP
6.5HP Gearbox Petrol Washer
www.jeffersontools.com
SPECIFICATIONS
Flow Rate: 12.6 L/Min
Rated Pressure: 2700psi / 185bar
Engine: Loncin 6.5HP Stage V / OHV Petrol 196cc
Starting System: Recoil Start
Guaranteed Sound Power Level: * 101 dB Lwa
Fuel Tank: 3.6L
Lubrication Oil: Engine: SAE 10W30 (600ml)
Gearbox: SAE 10W30 (160ml)
Pump: SAE 10W30 (440ml)
Hose: 10M Steel Braided
Lance: 20" Stainless Steel
Nozzles: 0°, 15°, 25°, 40°, 65°
* Sound Power Level:
The figures quoted in this table are emission (sound power) levels and are not necessarily safe working levels. Whilst there is a correlation between the emission and exposure
levels, this can not be used reliably to determine whether or not further precautions are required.
Factors that influence the actual level of exposure to the work-force include the characteristics of the work room, the other sources of noise, the number of machines and
other adjacent processes, and the length of time for which an operator is exposed to the noise. Also the permissible exposure level can vary between regions. This information,
however, will allow the user of the machine to make a better evaluation of the hazard and risk.
EQUIPMENT IDENTIFICATION
1. Recoil Starter
2. 6.5HP Loncin Engine
3. Throttle Lever
4. Fuel Valve Lever
5. Choke Lever
6. Air Filter
7. Mufer
8. Fuel Cap / Fuel Tank
9. Brass Pump
10. Water Outlet
11. Detergent Injector
12. Pressure Adjustment
13. Water Inlet & Filter Screen
14. Cleaning Nozzles
15. Spray Gun
16. High Pressure Hose
17. Lance
18. Engine Oil Reservoir Cap
19. Ignition Switch
20. Wheels
1
2
3
4
5
6
7
8
9
10 11 1213
14 15
16
17
18
19
20

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USER MANUAL v2.1
JEFWASPGRO65HP
6.5HP Gearbox Petrol Washer
www.jeffersontools.com
SAFETY GUIDELINES
Please read and ensure that you understand all of the operating instructions, safety
precautions and warnings in this Instruction Manual before operating or maintaining this
equipment. An accident can often be avoided by recognizing a potentially hazardous
situation before it occurs, and by observing the appropriate safety procedures. Hazards
that must be avoided to prevent bodily injury or machine damage are identied by warnings
on the equipment and in this Instruction Manual. Never use this equipment or modify it in
any way that has not been specically recommended by the manufacturer.
Risk of Explosion or Fire
Important: Petrol and its vapours are extremely flammable and explosive. Fire or explosion can cause severe burns
and injuries. Please follow the following guidelines:
• Always shut off the engine and allow it to cool before adding fuel to the tank.
• Always use care when lling the tank to avoid spilling fuel. Move the pressure washer away from the fuelling area
before starting the engine.
• Always operate and fuel the equipment in well-ventilated areas free from obstructions. Ensure that the work area
is equipped with re extinguishers suitable for petrol res
• Never operate the pressure washer in an area containing dry brush or weeds
• Always keep the pressure washer a minimum of four feet away from surfaces that could be damaged by mufer
exhaust heat (for example houses, cars, plants etc.)
• Always store fuel in an OSHA approved container in a secure location away from the work area
• Never spray ammable liquids.
Dangerous Fumes - Breathing Hazard
Important: Running the petrol engine gives off carbon monoxide which is an odourless, poisonous gas. Breathing
carbon monoxide can cause nausea, fainting or death. Some chemicals or detergents may be harmful if inhaled or
ingested, seek medical advice immediately in the event of breathing any toxic fumes
• Always operate this equipment in a
well-ventilated work environment (avoid
enclosed areas such as garages and
basements etc.)
• Prevent exhaust fumes from entering
into conned areas (for example: through
windows doors, ventilation etc.)
• Do not operate near children or animals
• Only use uids and detergents
recommended by your supplier that are
suitable for high pressure washers
• Always follow the manufacturers
recommendations, wear a respirator or
mask whenever there is a chance that toxic
vapours can be inhaled
• Never use chlorine bleach or any other
corrosive compound with this equipment

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USER MANUAL v2.1
JEFWASPGRO65HP
6.5HP Gearbox Petrol Washer
www.jeffersontools.com
SAFETY GUIDELINES
This equipment should only be operated by qualified and
responsible individuals who have read and understood
the information and guidelines described in this
document. In particular, the following safety instructions
should be followed to reduce the risk of injury to the
operator and members of the public.
1. Ensure that all the necessary safety precautions are
observed for the handling of fuel.
2. Familiarise yourself with this equipment and its
operation before use - read this user manual
carefully before use. Save for future reference.
3. This appliance is for outdoor use only. Ensure that all
bystanders are kept at a safe distance and that animals
and children are kept from the work area. Ensure that the
exhaust emissions are kept away from air intakes.
4. Never use this equipment if any part or accessory is
damaged or malfunctioning.
5. This appliance has been designed for use with
detergents specified by the manufacturer. Please
consult the manufacturer or supplier for advise before
using other detergents or chemicals in order to prevent
damage to the equipment and the environment.
6. Do not direct the nozzle towards mechanical parts
containing lubricant grease. High pressure jet can be
harmful and dangerous always ensure a safe working
distance when spraying objects and assess and fix the
appropriate nozzle for the job at hand.
Never point the high pressure hose directly
at people animals, live electrical parts or the
appliance itself.
7. Do not step or stand on the high pressure hose
and ensure that the hose is clean, free from debris,
obstructions and kinks before use. Always unwind the
hose fully before use.
8. Check and ensure that the nozzle has been fitted
correctly before use as the high pressure can result in the
nozzle being "fired" from the lance with
considerable force if not fitted correctly.
9. Beware of kick-back force and the sudden torque on
the spray gun assembly when operating the trigger.
10. Ensure that you have evaluated the pressure
required for the job at hand and selected the appropriate
nozzle before use. High pressure jets can remove paint
and other specialised surface treatments (including alloy
wheel lacquer). High pressure jets may also breakdown
and remove the grouting between paving slabs and can
even damage tarmac.
11. Always shut the equipment off completely when not
in use and if left unattended.
12. Keep the hose clear from the engine exhaust as this
can be extremely hot before and after use and can burn
and damage the hose.
13. Never refuel the engine when it is running, and allow
the engine to cool sufficiently before refuelling. Dry up
any fuel spillage before restarting the equipment. Only
use fresh clean high-quality fuel. Always restart the
equipment away from the refuelling area. Fill tank to
within 10mm of neck to allow space for fuel expansion.
14. Do not operate this equipment in an explosive
atmosphere, near combustible materials.
15. Only operate outdoors in well-ventilated areas.
16. Never run the engine without oil - always check for
oil and refill where necessary before use.
17. Only Jefferson approved engineers should carry
out repairs and maintenance on this equipment. Only
use Jefferson-approved replacement parts to repair
this equipment. Never modify the equipment in anyway.
Ensure that the equipment is kept in good working order
and cleaned and serviced regularly. Regularly check
external nuts and fixings to ensure that they have not
loosened from vibration during use.
18. After use: remove the spark plug ignition lead from
the back of the spark plug and position the lead to
prevent avoid accidental reconnection. Store in a clean
dry environment. Store all fuel in a suitable container
designed for petrochemical applications - away from
heat and out of direct sunlight.

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USER MANUAL v2.1
JEFWASPGRO65HP
6.5HP Gearbox Petrol Washer
www.jeffersontools.com
UNPACKING & ASSEMBLY
This equipment requires assembly and some initial servicing (adding oil and fuel)
after unpacking.
1. Unpack the pressure washer:
Set the carton on a rigid at surface and remove all loose packaging, Leave the
pressure washer in the carton.
Warning: This equipment is heavy. Do not attempt to lift and remove
the petrol washer from the carton without assistance.
Using a safety knife or box cutter, open the carton completely by cutting down to
the four corners allowing the sides to fall at. Leave the equipment on the carton
to provide a clean working surface to t the wheel and rubber leg bumpers.
2. Wheel assembly:
Fit the axles into the axle ports as shown in Fig 1. Secure with the nut spring
washer and washer. Fit the wheels to the axles and secure with the nut and
washer Fig 2. (Note: Do not overtighten the nuts to allow the wheels to turn freely.)
3. Assemble the rubber feet:
Fit the rubber feet to the legs as shown in Fig 3.
4. Assemble the gun/hose hook:
Fit the hook into the position shown in Fig 4.
5. Prepare the pressure pump and gearbox:
The pressure pump and gearbox are packed with a shipping plug inserted into
the opening for the pump breather plug. It is important that the shipping plug is
removed and replaced with the dipstick / oil plug to prevent damage to the pump.
Warning: Failure to remove the shipping plugs could void the
warranty for this equipment.
Using a 17mm open-end spanner carefully remove the shipping plugs from the
pressure pump and gearbox. Discard the shipping plug. (See Fig 5.) Remove the
breather plug from the parts bag and insert it into the oil/dipstick socket. Tighten
securely by hand to prevent any damage to the threads.
6. Check/fill Oil:
Use the sight glass on the end of the pump and gearbox to ensure oil level is at
1/2 the level of the sight glass. (See Fig. 6). Use SAE 10W30 oil for gearbox and
pump (capacities are shown in the specication table on Page 4.
Note: Outdoor temperatures can determine the proper oil viscosity
1.
2.
3.
4.
5.
6.

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USER MANUAL v2.1
JEFWASPGRO65HP
6.5HP Gearbox Petrol Washer
www.jeffersontools.com
UNPACKING & ASSEMBLY
1. Adding Engine Oil:
1. Place the assembled pressure washer on a at, level surface.
2. Clean the area around the oil ll and remove oil ll cap.
3. Using an oil funnel slowly pour the oil into the oil ll to the required
level. (See Fig 7.1 - 7.3).
Use SAE 10W30 grade oil to ll the engine oil resevoir (capacities are
shown in the specication table on Page 4.
Important: Never attempt to start the engine before oil has been
checked and added. Failure to do so can result in engine failure
and could void your warranty.
2. Adding Fuel:
Do not use any unapproved petrol types (for example E85 85% ethanol
15% petrol) - speak to your nearest Jefferson dealer for advice on the
best unleaded petrol to use if you are unsure.
Do not mix oil with petrol.
Do not modify the engine to run on alternative fuels.
Mix in a fuel stabilizer when adding fuel to the pressure washer to
protect the fuel system from forming deposits. If the engine does not run
properly please check that you are using the correct type of fuel. The
engine is certied to run on petrol. The emission control system for this
engine is EM (Engine Modications).
1. Turn the pressure washer Off and let it cool for at least two minutes
before removing the fuel cap. Loosen the fuel cap slowly to release the
pressure.
2. Always ll the fuel tank outdoors in good ventilation.
3. Do not overll the fuel tank (See Fig 8.2).
4. Wait for spilled fuel to evaporate before cranking the engine.
5. Keep fuel away from sparks, open ames, pilot lights, heat and other
ignition sources.
6. Clean the area around the fuel cap and slowly remove the cap to allow
any pressure to escape.
7. (See Fig 8.3) Slowly add the unleaded petrol (A) to the fuel tank
(B). Use extreme caution not to ll fuel above the bafe (C) to allow
appropriate space for fuel expansion.
8. Replace the fuel caps and allow any spilled fuel to evaporate before
starting the engine.
Important: Fuel and fuel vapour are extremely flammable and
potentially explosive. Take care to follow the following safety
precautions when refuelling. Failure to use fuel as recommended
in this manual can void your warranty.
4.
7.2
7.1
7.3
8.1
8.2
8.3

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USER MANUAL v2.1
JEFWASPGRO65HP
6.5HP Gearbox Petrol Washer
www.jeffersontools.com
EQUIPMENT SETUP
1. Attaching the Spray Gun to the High Pressure Hose:
• Pull the slip ring on the female quick-disconnect tting back on the high
pressure hose (See Fig 9).
• Insert the male quick-tting on the spray gun into the female socket on the
high pressure hose.
• Release the slip ring on the female disconnect and twist. Listen for a
"click" to ensure both of the quick ttings have been coupled correctly
• Pull the high pressure hose and spray gun in opposite directions to ensure
that they do not separate under pressure.
2. Connecting the Spray Lance to the Spray Gun:
• Thread the spray lance on to the spray gun until secure (See Fig 10)
3. Connect the Hose and Water Supply to the Pump
Attach the other end of the high pressure hose to the high pressure outlet on
the pump. Pull down on the collar of the quick release tting and slide onto the
pump and let go of the collar.
Pull on the hose to ensure of a tight connection. (See Fig 11.)
Before connecting the hose to the water supply ensure that the lter screen is
clean and remove any dirt or debris found.
Replace the lter if it is damaged. (See Fig 12). Connect to the supply.
Run water through the hose for 30 seconds to remove any dirt before
connecting.
Important: Do not syphon any standing water to use for the water supply. Use
only cold running water from mains supply (no more than 100°F)
Connect the hose (it should not exceed 50ft in length) to the water inlet on the
pressure washer. Tighten by hand until secure.
Turn on the water. Squeeze the trigger to purge the pump system of air an
impurities. (See Fig 13).
Warning: Do not attempt to crank or start the engine before it has
been properly serviced with the recommended oil. This can lead to
engine failure and void your warranty.
Note: There must be at least 10ft (3m) of unrestricted hose between
the washer inlet and any fittings such as a vacuum breaker or check
valve.
9.
10.
11.
12.
13.

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USER MANUAL v2.1
JEFWASPGRO65HP
6.5HP Gearbox Petrol Washer
www.jeffersontools.com
SAFE WORKING ENVIRONMENT
Set up the pressure washer in a well-ventilated area to prevent build up of carbon monoxide and other toxic fumes.
Do not use the pressure washer in an environment where exhaust gas can accumulate and enter or be drawn into an
occupied building or a conned area (for example via windows or other ventilation.)
Care should be taken to observe prevailing winds and air currents that could divert the fumes into occupied buildings
or conned areas. (See Fig 14).
Warning: Exhaust heat/gases
can ignite combustibles.
structures or damage
the fuel tank causing a fire
hazard. Ensure that you keep
at least 5ft (1.5m) of clearance
on all sides of the pressure
washer including overhead.)
Warning: Running the petrol
engine gives off carbon
monoxide which is an
odourless, poisonous gas.
Breathing carbon monoxide
can cause nausea, fainting
or death. Seek medical advice
immediately in the event of
breathing any toxic fumes.
STARTUP PROCEDURE
To start your pressure washer for the rst time, follow these instructions step-by-step. This starting information also
applies if you have not used the washer on a regular basis.
1. Place the pressure washer near an outside water source capable of supplying water at a ow rate of at least 5
gallons per minute and no less than 20psi at the pressure washer end of the garden hose.
2. Check that the high pressure hose is securely connected to the spray gun and pump
3. Make sure the unit is sitting in a level position.
4. Uncoil the high pressure hose completely before using the pressure washer.
5. Connect the garden hose to the water inlet on the pressure washer pump.
14.

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USER MANUAL v2.1
JEFWASPGRO65HP
6.5HP Gearbox Petrol Washer
www.jeffersontools.com
Warning: Do not run the pump without the water supply
connected and turned on.
Please Note: Any damage resulting from failure to follow this
instruction will void the warranty on this equipment.
6. Turn on the water, point the gun in a safe direction and squeeze the
trigger to purge the pump system of air and impurities (See Fig 15.).
7. Attach the lance to the spray gun and tighten by hand until secure.
8. Choose the nozzle you require for the job at hand, pull back the collar
on the quick tting, insert the nozzle and release the collar to connect.
Tug on the nozzle to make sure it is securely connected.
9. Turn the fuel shut off valve to the "On" position. (See Fig 16.)
10. Move the throttle control lever to the "High" position (indicated by
the rabbit icon on the engine). (See Fig 17.)
11. Move the choke lever to the "Choke" position (See Fig 17.)
Note: For warm engines ensure that the choke is in the "Run" position.
Warning: Before starting the pressure washer be sure you are
wearing the appropriate Personal Protection Equipment (PPE) for the
job at hand. Safety goggles should always be worn when using this
pressure washer.
12. When starting the engine, position yourself as shown in Fig 18. Grip
the starter handle and pull slowly until you feel some resistance. Then
pull rapidly to start the engine.
13. Return the starter grip handle slowly. Do not allow the starter cord to
"snap back" against the starter.
14. When the engine starts, slowly move the choke lever to the "Run"
position as the engine warms up. If the engine falters during this step,
move it back to the "Choke" position, then back to the "Run" position.
15. If the engine fails to start, point the spray gun in a safe direction and
squeeze the trigger to release any pressure.
16. If the engine fails to start after 6 attempts, move the choke lever to
the "Run" position and repeat steps 13-15.
Important: Allow the engine to run at no load, low pressure for at least 5
minutes after each startup.
Warning: The spray gun retains high water pressure even when
the engine is stopped and disconnected. Aways discharge this by
squeezing the trigger on the spray gun, pointing in a safe direction.
15.
16.
17.
18.

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USER MANUAL v2.1
JEFWASPGRO65HP
6.5HP Gearbox Petrol Washer
www.jeffersontools.com
STOPPING THE PRESSURE WASHER
1. Release the spray gun trigger and let the engine idle for two minutes.
2. Move the throttle control lever to the "Stop" position.
3. Always point the spray gun in a safe direction press the red button
and squeeze the spray gun trigger to release the retained high water
pressure.
4. When the engine starts, slowly move the choke lever to the "Run"
position as the engine warms up. If the engine falters during this step,
move it back to the "Choke" position, then back to the "Run" position.
This equipment comes complete with ve different colour-coded spray
nozzles. Each nozzle delivers a specic spraying pattern for a particular
cleaning
application (see Fig 19).
The size of the nozzle determines the size of the spray jet and the pres-
sure delivered from the nozzle.
SPRAY NOZZLES
Nozzle Size Guide:
0º Nozzle - Red: This nozzle delivers a pinpoint stream of pressurised
water and is extremely powerful. It only covers a small cleaning area.
This nozzle should only be directed at surfaces that can withstand high
pressure such as metal or concrete. Do not use this nozzle to clean
wood.
15º Nozzle - Yellow: This nozzle delivers a powerful 15 degree spray
pattern for intense cleaning of small areas. This nozzle should only be
used on areas and materials capable of withstanding high pressure.
25º Nozzle - Green: This nozzle delivers a 25 degree spray for a medium
intensity cleaning over larger areas.
40º Nozzle - White: This nozzle delivers a 40 degree spray for low
pressure cleaning over large areas. This is the ideal nozzle for general
cleaning purposes.
Chemical Nozzle - Black: This nozzle is used to apply special
chemicals and cleaning solutions. This nozzle produces the weakest
pressure stream of the 5 nozzles.
The pressure washer nozzles are stored in receptacles on the nozzle
panel with colour coded guides to indicate which nozzle goes where. 19.

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USER MANUAL v2.1
JEFWASPGRO65HP
6.5HP Gearbox Petrol Washer
www.jeffersontools.com
Attaching Pressure Nozzles to the Spray Gun
1. Pull the slip ring on the female quick-tting on the lance backwards.
2. Insert the male quick tting on the pressure nozzle into the female tting on the spray lance.
3. Release the slip ring on the female quick tting and twist. Listen for the "click" to ensure that the ttings are
coupled securely.
4. Pull the high pressure nozzle and spray lance in opposite directions to ensure that they do not separate under
pressure.
Note: In order to prevent damage to your cleaning surface and to select an appropriate nozzle size for your
application always start with the lowest pressure nozzle size (white) and continue changing to a higher nozzle size until
the correct nozzle and pressure is identified for your task.
Warning: This equipment operates at fluid pressures and velocities high enough to penetrate human flesh.
Leaks caused by loose fittings or worn or damaged hoses can result in injection injuries. Do not direct
the spray jet towards people or animals as the jet is very powerful and serious injury can occur. Wear the
appropriate safety equipment when operating this equipment.
Do not attempt to change the nozzles when the equipment is running. Always shut down the
engine completely before changing the nozzles.
ADJUSTING SPRAY PRESSURE
As well as adjusting the spray pressure using the various nozzles
shipped with this equipment you can control the pressure on the washer
itself by turning the pressure control knob.
Turn the knob clockwise to increase the pressure and counterclockwise
to decrease it (See Fig 20).
USING CHEMICALS & DETERGENTS
Note: Only use chemicals & detergents that are suitable for use with this product and that have been approved by
Jefferson Tools. Some domestic detergents, acids, alkalines, bleaches, solvents, flammable materials or industrial
grade cleaning solutions can cause damage to the pump. Please check with your nearest Jefferson dealer for advice
if you are unsure before using chemicals and detergents with this equipment. Some detergents may require mixing
before use. Prepare the cleaning solution as instructed by the manufacturers instructions before use.
Set Up Procedure:
1. Attach the chemical hose onto the barbed tting situated near the
back of the high pressure hose connection. (See Fig 21).
2. Press the other end of the chemical hose (with the lter attached) into
the container holding the chemicals or detergents you are using.
3. Attach the chemical nozzle onto the lance as shown previously (See
Fig 22).
20.
21.

14
USER MANUAL v2.1
JEFWASPGRO65HP
6.5HP Gearbox Petrol Washer
www.jeffersontools.com
USING CHEMICALS & DETERGENTS
Chemical Cleaning:
Spray the chemicals onto a dry surface using the procedures outlined
in previous sections. Start at the lower portion of the cleaning area and
working upwards, using long, even, overlapping strokes. (See Fig 23.).
Always ensure that the lter is fully submerged in the cleaning solution at
all times.
Allow the detergent to soak in for 3-5 minutes before washing and
rinsing.
Re-apply as needed to prevent the surface from drying. Do not allow the
detergent to dry on to the cleaning surface to prevent streaking.
Note: Detergent cannot be applied with the high pressure spray tips
(white, green, yellow or red)
After Chemical Cleaning:
Important: You will need to flush the detergent siphoning system after each use by placing the filter into a bucket of
clean water then run the pressure washer in low pressure for 1-2 minutes.
After using chemicals, soaps and detergents it is necessary to thoroughly clean the pressure washer.
Place the chemical hose in a container of clean water.
Turn on the pressure washer and hold the trigger on the spray gun top draw clean water through the system to clean
it thoroughly.
MAINTENANCE
To ensure efficient operation and longer life of your pressure washer a routine maintenance schedule should be
prepared and followed. If the equipment is used in unusual conditions such as high-temperature or dusty conditions
more frequent maintenance checks will be required.
Warning: Before performing any maintenance be aware that the equipment should be completely shutdown,
depressurised and allowed to cool down. This will ensure that no injuries can be sustained by moving parts,
water pressure or hot surfaces.
The fuel tank contains flammable fuel do not smoke near or work near naked flames while
maintaining this equipment.
Please note: All repairs should be carried out by Jefferson approved engineers. All replacement parts
should be supplied or recommended by Jefferson. Any unapproved repairs or modifications will
invalidate the warranty.
22.
23.

15
USER MANUAL v2.1
JEFWASPGRO65HP
6.5HP Gearbox Petrol Washer
www.jeffersontools.com
Engine:
Check the engine regularly, replace oil, clean spark plugs and maintain parts as required.
Pump Oil:
Change the pump oil regularly. Change the pump oil after the first 50 hours of work and successively every 100
hours. In either case ensure that the oil is changed at least once a year.
Check with your nearest Jefferson dealer for advice on the best Pump Oil to use with this
equipment if you are unsure.
The water filter should be checked regularly and cleaned if necessary:
1. Remove the filter by grasping the end and removing it from the water inlet on the pump.
2. Clean the filter by flushing it with water on both sides.
3. Re-insert the filter in the water inlet on the pump.
Spray Gun:
If the nozzle becomes clogged with dirt and debris excessive pressure can build up. If the nozzle becomes partially
clogged or restricted the pump pressure will fluctuate and can become harmful and dangerous.
Clean the nozzle immediately and follow these instructions:
1. Shut-off the engine and turn off / disconnect the water supply.
2. Pull the trigger on the gun to relieve any water pressure.
3. Disconnect the lance from the gun.
4. Remove the nozzle from the lance - remove any obstructions with the nozzle cleaning tool provided and back
flush with clean water.
5. Direct the water supply into the spray wand end to back flush loosened particles for 30 seconds.
6. Reassemble the nozzle onto the lance.
7. Reconnect the lance to the gun and turn on the water supply.
8. Start the washer pump and place the lance into the high pressure setting to test.
Cleaning The Water Filter:
The water filter should be checked regularly and cleaned if
necessary:
1. Remove the filter by grasping the end and removing it
from the water inlet on the pump.
2. Clean the filter by flushing it with water on both sides.
3. Re-insert the filter in the water inlet on the pump.
Cleaning the Fuel Tank Filter:
The fuel tank filter should be removed and cleaned after
every 150 hours of running or every 3 months using an
environmentally-friendly water-based de-greasing agent.
Refit when clean.

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USER MANUAL v2.1
JEFWASPGRO65HP
6.5HP Gearbox Petrol Washer
www.jeffersontools.com
MAINTENANCE
Maintenance Schedule:
Frequency
Item Task Description Each Use 1st Month
(20Hrs)
Each Season
(50Hrs)
Every
6 Months
(100Hrs)
Every
Year
(300Hrs)
Engine Oil Oil Level Check •
Replace • •
Reduction gear oil Oil Level Check •
Replace • •
Air Cleaner
Check •
Clean •x •x*
Replace •**
Deposit Cup Clean •
Spark Plug Clean, adjust •
Replace •
Spark Eliminator Clean •
Idling Check, Adjust •∆
Valve Clearance Check, Adjust •∆
Fuel Tank & Filter Clean •∆
Fuel Supply Line Check Check with your Jefferson dealer for advice if any problems are detected
Key:
* = Only for inside ventilating double core Carburetors
** = Only for paper core cleaners
x = Repeat task more often than scheduled if equipment is used in dusty working environments
∆ = Maintenance to be carried out by Jefferson approved technician

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USER MANUAL v2.1
JEFWASPGRO65HP
6.5HP Gearbox Petrol Washer
www.jeffersontools.com
STORAGE
After General / Regular Use
1. Drain all water from the high pressure hose, coil it and hang on the cradle on the petrol washer frame. If chemicals
where used ensure the pump and chemical hose are thoroughly cleaned out.
2. Drain all the water from the gun and lance by holding the gun in a vertical position with the nozzle end
pointing down and squeeze the trigger. Store in the gun/hose holder.
Preparation for Winter and Long-term Storage
Note: It is recommended that you follow these steps to protect the internal seals of the pump when storing the
equipment for more than 30 days and or when, freezing temperatures are expected.
1. Obtain a funnel, 200ml of anitfreeze and approximately 1M of garden hose with a male hose connector
attached to one end.
2. Disconnect the spark plug wire.
3. Connect the hose to water inlet on the pump.
4. Pour the antifreeze into the hose via the funnel.
5. Pull the engine starter cord slowly several times until antifreeze comes out of the high pressure water hose
connection on the pump.
6. Remove the short hose from the water inlet on the pump.
7. Reconnect the spark plug wire.
Service After Storage
Before reusing the equipment after storage, you should carry out the following to keep the equipment in good
condition.
Storage Time Service Task
Within one month No service required
One - two months Drain out the existing fuel out of the fuel tank and fresh fuel
Two months - one year Drain out the existing fuel out of the fuel tank and fresh fuel
Drain the fuel out of the Carburetor*
Empty the deposit cup**
Over a year Drain out the original fuel of the fuel and refuel
Drain the fuel out of the Carburetor*
Empty the deposit cup**
Start the engine and allow to run for a few minutes
Key:
* = Unscrew the drain plug and drain out the fuel in the Carburetor
** = Turn engine switch to the off position, disconnect the deposit cup and empty contents safely
Note: Do not dump oil vessels or discarded engine oil onto the ground. Take all discarded engine oil in a closed
container to your nearest recycling station.

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USER MANUAL v2.1
JEFWASPGRO65HP
6.5HP Gearbox Petrol Washer
www.jeffersontools.com
TROUBLESHOOTING

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USER MANUAL v2.1
JEFWASPGRO65HP
6.5HP Gearbox Petrol Washer
www.jeffersontools.com

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USER MANUAL v2.1
JEFWASPGRO65HP
6.5HP Gearbox Petrol Washer
www.jeffersontools.com
PRESSURE WASHER MAIN ASSEMBLY - PARTS LIST & DIAGRAM
# Description Qty # Description Qty
1Gun Holder and Hose Hook 1 18 Wand 1
2Plain Washer 1 19 Rubber Foot 2
3Fix Nut 1 20 Plain Washer 2
4Grommet 5 21 Fix Nut 2
5Nozzle Set 5 22 Engine Fixing Bolt 4
6Decal 1 23 Spring Washer 4
7 Filter 1 24 Plain Washer 4
8 Chemical Inlet Hose 1m 25 Fix Nut 4
9Pump Fixing Bolt 4 26 Spring Washer 4
10 Spring Washer 4 27 Axle Fix Nut 2
11 Pump Gear Reduction Assembly 1 28 Spring Washer 2
12 Engine 1 29 Plain Washer 2
13 Key 1 30 Axle 2
14 Thermal Protection Valve 1 31 Clip 2
15 Frame 1 32 Wheel 2
16 High Pressure Hose 10m 33 Plain Washer 2
17 Spray Gun 1 34 Wheel Fix Nut 2