PARTS ASSEMBLY AND IDENTIFICATION .......................................................... 12-20
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SAFETY INSTRUCTIONS
Read and understand these instructions because they have to do with
safety. Pay particular attention to the safety symbol throughout this
manual. Failure to comply with these instructions may result in personal
!
ELECTRICAL SAFETY
1. Properly ground this unit. Failure to ensure proper grounding can cause serious personal injury.
Never use a two-prong adapter on the three-prong electrical plug that is installed.
2. Be certain all switches are “OFF” before plugging the unit into a compatible 120 volt power
source.
3. Always turn off and unplug the unit from the power source if leaving unattended. Never leave
unit unattended while running.
4. Never allow an electrical cord or connections to lay in water, it can cause a serious/fatal shock.
5. Do not use this unit on or near any electrical installations, including electrical outlets, light bulbs,
fuse boxes or transformers. Severe electrical shock can occur.
injury or product damage.
6. Unplug the unit from power source before attempting any repairs. Electrical repairs are best
suited to a licensed electrician.
7. Follow all local, state and federal electrical installation codes.
VENTILATION AND FIRE SAFETY
8. Use only No. 1 or No. 2 Diesel, to fill the fuel tank. Never use kerosene, gasoline, crankcase
drainings or oil containing gasoline/solvents, these can ruin your pressure washer.
9. Fill the fuel tank slowly and only when the unit is COOL.
10. Never operate the unit near dust, gases, flammable vapors or other ignitable materials.
11. Always operate the pressure washer with the hood cover in place.
12. Allow the unit to cool down after stopping the pressure washer before leaving it unattended.
See cool down procedure in STOPPING THE PRESSURE WASHER section.
13. Consult a qualified heating contractor for permanent installation. Follow all local, state and
federal codes.
14. Always be sure there is adequate oxygen and ventilation during indoor use. Carbon monoxide
gas is odorless and colorless, it can cause serious illness end even death. Vent all burner exhaust
outside the building. Poorly ventilated areas cause bad combustion, motor overheating and
serious danger.
15. Never alter or modify the unit or its safety features. Be sure all components can handle the high
pressure this unit generates.
16. Be sure all connections are secure before operating the unit. Do not over tighten pressure washer
adjustments; excess pressure, irregular unloader operation and wear may occur.
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GENERAL SAFETY
17. Always wear safety glasses or goggles when operating the unit.
18. Always point the wand away from people and animals. High pressure streams will penetrate the skin. Seek medical attention immediately if fluid penetrates skin. Do not treat as a simple cut.
19. Always release system pressure after shutting off the pressure washer by squeezing the wand
trigger. Never leave the unit unattended with system still pressurized.
20. High pressure spray will shatter fragile materials. Never spray directly at glass or other breakable
objects.
21. Be firmly braced before squeezing the wand trigger “on”. High pressure stream may cause loss
of balance.
22. Never operate the pressure wand in high levels unless the proper safety equipment to prevent
fails is in place.
23. Inspect pressure hose daily for signs of wear. Never lay hose on the heat coil or drag over
abrasive surfaces.
Replace hose and other components promptly when leaks or wear is discovered. Never place
your hand over a pressurized leak.
24. Repair any leaks before operating the unit. Any fuel oil, pump oil or water leaks should be
serviced at your nearest Northern store or call customer service at 1-800-222-5381.
25. Use only Northern parts for replacements in your pressure washer. Other brand components may
cause hazardous operating conditions and will void warranty.
DETERGENT SAFETY
26. Do not alter the soap injecting system on the unit or use it in any manner not described in
this manual.
27. Always wear safety goggles when operating the unit and other safety attire recommended by
the detergent manufacturer. Protective clothing like rubber gloves, rubber suits and respirators
may by necessary.
28. Never use acid type cleaners or other highly corrosive detergents with this pressure washer.
29. Know your detergents! Follow all appropriate instructions for preparation, use, safety and
transportation of the detergent. Keep all detergents away from children. In an emergency, tell the
physician exactly what detergent you are using.
UNPACKING
Closely inspect all the contents of the
Damaged components? Contact the freight company that delivered the unit and file a claim.
Missing components? Contact our Customer Service department at 1-800-222-5381.
SCOUT
157596 carton.
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ELECTRICAL REQUIREMENTS
“The supply and internal wiring of portable high pressure spray washing machines shall have ground-fault-circuitinterpreter (GFCI) which is designed to protect people from line-ground shock hazards”, National Electric Code
(NEC) 1987, 422, 8 (d) (3).
- All equipment and power cords connected down-line from the GFCI are protected.
- GFCI does not protect against line-to-line or line-to-neutral faults.
- GFCI does not protect against short circuits or overloads. Use a fuse or circuit breaker to guard against
these occurrences.
Northern recommends that all electrical service be performed by a licensed electrician.
- All electrical connections must be made according to local, state, and federal codes to maintain a valid
warranty.
- Connect the cord to a circuit that is wired for the 120 volts shown on the identification plate of the unit and
properly electrically ground the connection.
GROUNDING INSTRUCTIONS
This pressure washer must be grounded. Grounding provides a path of least resistance for electric current to reduce
the risk of shock if the unit should malfunction or breakdown. For your safety, plug the cord equipped with an
equipment-grounding conductor and a grounding plug into an appropriate outlet. The outlet should be properly
installed and grounded according to local electrical codes and ordinances.
GROUND-FAULT-CIRCUIT-INTERRUPTER
A GFCI is built into the plug of the pressure washer power supply cord. This GFCI provides additional protection
from electrical shock. Use only the identical replacement parts that include GFCI protection when replacing the
plug or power cord.
EXTENSION CORDS
Only use outdoor approved, 3-wire extension cords with 3-prong grounding-type plugs and 3-pole cord connectors
that accept the plug from the unit. Outdoor cords are identified by: “Acceptable for outdoor appliances; store
indoors while not in use”. Extension cord must have an electrical rating not less than the rating of the product.
Do not use a damaged extension cord or abuse the cord by yanking. Keep cord away from heat sources and
sharp objects. Always disconnect the extension cord from the power supply before disconnecting the unit from
the extension cord,
Improper connection of the equipment-grounding conductor can result
in a risk of electrocution. Check with a licensed electrician if you doubt
whether an outlet is properly grounded. Do not modify the product
!
plug, install a proper outlet with a licensed electrician. Reduce the risk
of electrocution, keep all connections dry and off the ground. Do not
touch with wet hands.
VENTILATION REQUIREMENTS
Permanent installation in an enclosed area or indoors should be performed by a qualified contractor. The burner
exhaust must be stacked to the outside atmosphere and a barometric draft regulator is required as well.
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INSTALLATION INSTRUCTIONS
If installing the
- Operate the unit on a level surface to ensure proper lubrification to the water pump.
- Be certain the ambient temperature of the environment does not exceed 100°F. This ensures adequate air
supply for the burner,
- Do not expose the unit to rain, snow or freezing temperatures.
- Do not install where dust, vapors or combustible materials will be present.
SCOUT
157596 indoors or in an enclosed area, observe the following guidelines:
PRE-OPERATION CHECK
CLOTHING
Proper clothing is essential for your safety. Use whatever is necessary to protect your eyes, ears, feet and skin.
Additional safely accessories (like a respiratory mask) may be required when using detergents with this washer.
PUMP
If oil is needed, fill with SAE 80-90 non-detergent oil AGIP ROTRA MULTI THT or correspondant products:
1. Connect the water supply to the 3/4” female garden hose swivel on the water inlet port of the unit.
Connect the other end of the hose to the pressurized water supply. The supply hose should have a
3/4” inside diameter (ID) and be no longer than 50 feet.
2. The water supply pressure must be a minimum of 20 pounds per square inch (PSI) and a
maximum of 125 PSI. The flow rate must be at least 3 gallons per minute (GPM).
3. Use a water softener if there is high mineral content in the water of your area. High mineral
content causes excessive scale build-up in the coil/heat exchanger.
4. Un-roll the hose reel and then connect one end of the high pressure discharge hose to the watergun assembly.
Be sure all connections are securely tightened.
Sudden release of high pressure streams can cause serious injury.
!
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OPERATING INSTRUCTIONS
STARTING THE PRESSURE WASHER
BEFORE STARTING THE PRESSURE WASHER
1. Read all safety instructions throughout this manual.
2. Be sure the motor switch is in the “OFF” position, red button pushed.
3. Ensure outlet is the proper voltage (120 volts).
4. Insert the male power plug into a grounded AC outlet.
5. Press and release the “RESET” button on the GFCI power cord.
6. Press “RESET” each time after plugging the GFCI power cord into a power source.
COLD WATER OPERATION
1. After following all preparation instructions, turn the water supply on.
2. Turn the unit on by pushing the pump switch on the control panel. Once the unit starts, squeeze
the trigger gun “ON” for 2 minutes to purge all air and mineral deposits from the system. This
operation is to be done without lance terminal end.
3. Turn the pump switch to OFF position, release the trigger gun and lock in the “OFF” position.
Fit the lance terminal end. To ensure you are in the high pressure mode, turn the nozzle holder
to the right.
4. Your
5. Every time you release tre trigger-gun, the machine automatically stops thanks to TOTAL STOP
SCOUT
“ON” by pushing the pump switch on the control panel. Squeeze the trigger-gun to spray a high
pressure stream and release the trigger to stop the stream.
System. The machine will re-start automatically once you press again the trigger-gun.
157596 is now ready to be used as a cold water pressure washer. Turn the unit
In case that TOTAL STOP is not working correctly, please note not
allow the unit to operate in bypass mode (with trigger released in the
“OFF” position) for more than 3 minutes.
!
Premature failure of pump packing may occur if left in bypass
mode for longer than 3 minutes.
Never look directly into the nozzle unless it is disconnected from the
spray wand.
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HOT WATER OPERATION
1. Fill fuel tank with 4,3 gallons of #l or #2 Diesel.
2. Be sure trigger gun is locked in the “OFF” position and remove the nozzle/wand assembly.
3. Turn the unit on by pushing the pump switch on the control panel. Once the unit starts, squeeze
the trigger gun “ON” for 2 minutes to purge all air and mineral deposits from the system.
4. Turn the pump switch to “OFF” position, release the trigger gun and lock in the “OFF” position.
Connect the nozzle-wand assembly to the gun assembly. To ensure you are in the high pressure
mode, turn the nozzle to the right.
5. Turn the pump switch to “ON” position, turn the burner knob located on the control panel to
“ON” (position 1) Squeeze the trigger gun to spray, burner only fires when the trigger is squeezed.
6. The unit is now ready to be used as a hot water pressure washer. Squeeze the trigger-gun to spray
a high pressure stream, and release the trigger to stop the stream.
7. Cool down the heat exchanger by turning the burner knob “OFF” (0 position). Allow unit to run
with trigger in the squeezed, “ON” position for at least 3 minutes.
NOTE:
On initial startup, water will begin turning hot in 30 seconds, reaching maximum temperature in 3 minutes with
trigger squeezed. Burner stops firing when the trigger is released or when water exceeds the temperature setting.
!
CAUTION!
EXPOSED METAL EXHAUST OUTLET AND HOSE
CONNECTIONS DURING HOT OPERATION ARE EXTREMELY
HOT!
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STOPPING THE PRESSURE WASHER
To protect your safety and the service of your
!
1. Run one gallon of clean water through the used detergent lines. (If detergent has been used during
this operation run).
2. Turn burner switch to “OFF” (0 position).
3. Squeeze the trigger and discharge cool water for 3 minutes to cool the burner component.
4. Turn the unit “OFF” with the main switch on the control panel.
5. Turn off the water supply immediately.
6. Squeeze the trigger gun to relieve system pressure and drain excess water.
7. Disconnect power cord and unit hoses.
USING THE DETERGENT INJECTOR
must follow the procedure for stopping the pressure washer outlined
below:
SCOUT
157596, you
This feature is designed for use with mild detergents. North Star detergents are highly recommended for use with
all North Star pressure washers.
1. Prepare cleaning solution according to the detergent label directions.
2. Fill Detergent tank with detergent solution
3 Turn the nozzle at the end of the wand to the left for low pressure.
4. Start the unit as directed in the OPERATING INSTRUCTIONS. Brace yourself and the triggered
gun. The detergent and water mixture will exit the low pressure nozzle.
5. Apply the solution by spraying from low surface and move up; use long, overlapping strokes.
Applying from the bottom, up helps avoid streaking. Do not allow the detergent solution to dry
on any surface.
6. Turn nozzle at the end of the wand to the right for the high pressure rinse mode. It takes 30
seconds to purge all detergent from the system lines.
6. Start at the top and work down for the best rinsing results.
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MAINTENANCE
1. Inspect and clean the water intake screen on the unit before each use.
2. Always be sure the unit is receiving the proper 120 volts. Be certain the cord is equipped with the
appropriate ground prong plug to ensure proper grounding. Electrical cords and connections should
not contact water.
3. Always follow STOPPING THE PRESSURE WASHER instruction outlined on page 10 of this
manual.
4. Only run pump with water supply turned on all the way. Never allow pump to run dry.
5. Run a gallon of clean water through the injection line after each use. This flushes out any corrosive
chemicals and prevents residue from damaging moving parts.
6. Use a water softener if the water supply has a high mineral content. This will avoid accumulation of
mineral deposits in the coil/heat exchanger. If a softener is not available it is necessary to “de-scale”
the coil occasionally. See your nearest Northern store or call 1-800-222-5381 for customer service.
7. Detergents are corrosive. It may be necessary to repair or replace components on the detergent
injector system periodically as part of standard maintenance.
8. Never pump acids, alkalines or abrasive fluids through the unit.
9. Never operate the unit without the hood cover.
10. Eliminate leaks found in the pumping system by removing suspect parts, applying sealant to the
threads and reinstalling. If using Teflon tape, be sure no tape gets into any plumbing, this causes a
plugged spray nozzle and internal problems.
11. Change pump crankcase oil after first 50 hours of use, then every 200 hours (see Oil data on page 7)
12. Change fuel filter to burner every 6 months and screen in the fuel pump on the burner each year. Be
sure to use only high quality No. 1 or No. 2 Diesel.
13. Never spray water directly into the unit or store outdoors where it can be exposed to rain or other
adverse weather conditions.
14. Never store the unit in a freezing environment. This causes the coil/heat exchanger to rupture and
the water pump to “lock up”.. Never pour hot water on a frozen pump, a temperature change greater
than 150°F can crack the water pump. Again, do not store the unit in a freezing environment.
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TROUBLESHOOTING
SYMPTOMS CAUSES REMEDIES
The water pump will not start The motor thermic protection is open Check the mains voltage (+/- 5%
tolerance). Check the phases
in the plug are connected well.
The machine is not going in The no-return valve does not seal Replace the valve or the gasket
TOTAL STOP mode (unit in and check the pressure valve
by-pass) body wear.
Leakage from the water system Eliminate the leaks
of the gun
The water pump does not reach Nozzle worn Replace the nozzle
maximum pressure
Pressure ball or adjustment housing Replace the faulty part
worn or spring broken
Pressure valve gaskets worn Replace the valve gaskets
Pistons seal gasket worn Replace the gaskets
Nozzle holding head in position Turn the head on high pressure
low pressure
Strong vibrations on the water pumpWater supply insufficient Check the water supply flow and the relative pressure (2÷10)
Check the water filter and clean
it if necessary
Prime the pump without the lance
Alien matter under a check valve Check the valves, clean and
reassemble
The burner will not startDiesel filter blocked Clean the filter
Diesel nozzle blocked Clean the filter
Worn or broken electrodes Replace the electrodes
The pressure switch remains open Replace the pressure switch
Anormal noise of Diesel pump Low diesel Fill diesel tank or work on cold water
No detergent suction High viscosity of the employed Further dilute the detergent