North Star M157310AR - User Manual

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M157310A R

Owner's Manual

Instructions for Set-up, Operation, Maintenance & Storage

HOT WATER/STEAM PRESSURE WASHER – 3000 PSI / 4 GPM

Portable Outdoor-Use Only

This pressure washer produces both cold and hot water high pressure spray as well as steam spray. Cleaning

chemicals may be incorporated into the spray if desired. The pressure pump for this equipment is powered by

a gasoline internal combustion engine and the water is heated by a kerosene/fuel-oil fired, open flame burner.

WARNING – READ THIS MANUAL

READ and UNDERSTAND this Owner's Manual and the Engine Owner's Manual

completely before attempting to set up and use the pressure washer! Failure to properly set

up, operate, and maintain this pressure washer could result in serious injury or death to operator

or bystanders.

WARNING – SPECIAL HAZARDS

CO Poisoning

• Exhaust from both the engine and burner contains carbon monoxide, a

poisonous gas that can cause carbon monoxide poisoning and possible

death if inhaled. ONLY run pressure washer OUTDOORS and at least 20

feet from the home, away from windows, vents and air intakes, to allow

proper ventilation. If you start to feel sick, dizzy, or weak while using the

pressure washer, shut off the engine and get to fresh air RIGHT AWAY.

Skin/Eye

Injury

• High-pressure spray can cause serious skin or eye injury, including injection injury

if fluid pierces the skin. Injection injury can result in blood poisoning and/or

severe tissue damage.

Burns

• Hot spray can scald and burn skin.

• Hot surfaces of wand, engine and burner, as well as hot exhaust from both

the engine and burner can cause burns.

Slips/Falls

• Spray discharge can cause puddles and slippery surfaces.

• Spray-gun kickback can cause operator loss of balance and falls.

Flying Debris

• High-pressure spray can cause surface damage and flying debris.

Fire/

Explosion

• Engine and burner sparking can ignite fuel or other flammable liquids or

vapors in the vicinity.

• Hot exhaust from engine and burner can ignite combustible materials.

Chemical

Exposure

• Cleaning chemical vapors or contact with skin may be hazardous.

Electric shock

• Spray contact with electrical sources can cause electric shock.

A summary of important safety information is provided at the end of the manual.

Any Questions, Comments, Problems, or Parts Orders

Call NorthStar Product Support 1-800-270-0810

ITEM NUMBER: 157310

SERIAL NUMBER: _____________

Need help?

Do you have a question about the North Star M157310AR and is the answer not in the manual?

This document describes the NorthStar M157310AR Hot Water/Steam Pressure Washer, a portable outdoor-use only device designed for high-pressure cleaning with both cold and hot water, as well as steam. It can also incorporate cleaning chemicals into the spray. The pressure pump is powered by a gasoline internal combustion engine, and water is heated by a kerosene/fuel-oil fired, open flame burner.

Function Description:

The primary function of this pressure washer is to provide a high-pressure spray of water (heated or unheated) up to 4 gallons per minute at 3000 PSI. It can also incorporate cleaning chemicals into a low-pressure water spray. This versatility allows for effective cleaning across various applications, from heavy-duty industrial tasks to more delicate surfaces when using chemicals.

Important Technical Specifications:

Model #: 157310
Pressure Rating: 3000 psi
Flow Rate: 4 gpm
Maximum Temperature: 250° F
Dimensions:
- Length: 64"
- Width: 33"
- Height: 44"
Weight:
- Dry: 557 lbs.
- Fueled: 710 lbs.
Pump Type: CAT 66DX
Engine Horsepower: 390cc
Engine and Burner Fuel Tank Sizes: 8.75 gallon
High Pressure Discharge Hose: 3/8" x 50'
Chemical Injector: Maximum dilution ratio 13-to-1
Required Supplies (not included):
- Engine Fuel: Regular, Unleaded Gasoline
- Engine Oil: As specified in Engine Owner's Manual
- Burner Fuel: #1 or #2 Diesel, B5 or lower Biodiesel, Kerosene, or Fuel Oil
- Pump Oil: SAE 30 non-detergent oil (shipped with oil, but refills required)
- Battery: 12 Volt, minimum 18 Amp/Hr. Lawn and Garden Battery (Group U1)
- Input Water Supply: Standard tap water @ 20-75 psi, delivered @ 4.8 gpm
- Input Water Supply Hose: Standard garden hose with inside diameter at least 5/8" (at least 3/4" diameter if hose longer than 100 ft.)

Usage Features:

Safety Features:

High Pressure Safety Device (Rupture Disc): This unit is equipped with a high-pressure safety device that acts as a backup safety feature. If the unloader malfunctions, the high-pressure safety device will open and relieve excess system pressure.
High Temperature Limit / Thermostat: Measures discharge spray temperature and automatically turns off the burner when the temperature setting is reached. The burner automatically reignites when the temperature drops.
Thermal Relief Valve: Protects the pump from overheating. In bypass mode, if temperatures are too high, the valve opens to discharge hot water onto the ground, protecting the pump.
Spray Gun Safety Latch: A built-in trigger safety latch guards against accidental trigger actuation.
Warning Labels: Various labels indicate potential hazards such as danger, warning, and caution for fire, battery, burn, slips, and rupture disk.

Set-up and Operation:

Battery Installation: Requires a 12-volt standard lawn and garden battery (Group U1) with a minimum 18 amp-hour rating. The engine will run without a battery, but the burner will not fire. Specific instructions are provided for connecting and disconnecting battery cables to avoid shock and sparking.
Moving and Handling: The pressure washer is heavy and requires at least two people or a mechanical assist to lift. It has wheels and brakes for movement and positioning.
Fueling: Requires regular, unleaded gasoline for the engine and #1 or #2 diesel, B5 or lower biodiesel, kerosene, or fuel oil for the burner. Fueling must be done outdoors, away from heat/sparks, using an approved portable container, and avoiding overfilling.
Water Supply Connection: Requires a garden hose (at least 5/8" ID, or 3/4" ID if >100 ft) connected to a standard tap water supply (20-75 psi, 4.8 gpm). A backflow preventer is recommended.
High-Pressure Hose Connection: The 3/8" x 50' high-pressure hose connects to the water outlet using quick couplers.
Spray Nozzles: Comes with five high-pressure nozzles (Red 0°, Yellow 15°, Green 25°, White 40°, Black-Low pressure 65°) and one low-pressure nozzle (Black-Low pressure for chemicals). Each color corresponds to a specific spray angle and intended use (e.g., Red for highest impact, Black for chemicals).
Chemical Spraying: Chemicals can be applied at low pressure using the black nozzle. The chemical injector's adjustment knob controls concentration.
Hot Spray/Steam: The burner can be turned on for hot spray or steam, provided there is fuel in the burner tank and the engine throttle is fully open.
Stopping Procedure: Involves turning off the heater (if used), running cold water through the coil, turning off the engine and water supply, relieving system pressure, and removing hoses and nozzles.

Maintenance Features:

Maintenance Schedule (Frequency):

Remove dust/debris accumulation: As needed
Inspect fuel system: Each use
Inspect spray system: Each use
Clean inlet filter: Each use
Check tire pressure: Each use
Recharge and maintain battery: As specified in Battery Manufacturer's instructions
Perform engine maintenance: As specified in Engine Owner's manual
Change pump oil: After first 40 hours of use, then every 3 months or 500 hours of use after that
Maintain burner's fuel filter / water separator: Drain water as needed, change filter after every 500 hours of use
Descale coil: Annually, or more frequently as use and performance require
Inspect and desoot coil: Annually
Inspect/clean/adjust electrodes: Annually

Detailed Maintenance Instructions:

General Safety: Always shut off water supply, bleed pressure, turn off engine, and disconnect the spark plug before any maintenance. Replace all guards after servicing.
Keep Pressure Washer Clean: Clean with a damp cloth or soft brush; do not spray with a hose.
Inspect Fuel System: Check for leaks, deterioration, chafed hoses, loose connections, damaged tank, or defective shut-off valve before each use.
Inspect Spray System: Check hoses, fittings, wand, trigger gun, and connections for wear, cracks, looseness, or leaks before each use. Clean the nozzle orifice.
Clean Inlet Filter: Unscrew, remove, clean, and reassemble the inlet filter.
Check Tire Pressure: Remove air cap, check pressure, fill to 30 psi (2.07 bar) if needed (do not overinflate), replace air cap.
Change Pump Oil: Drain old oil, fill with 18 oz. of SAE30 non-detergent oil to the middle of the sight glass.
Maintain Burner's Fuel Filter/Water Separator: Drain water from the bowl after each use, and replace the filter every 500 hours.
Descale Heating Coil: Annually or more frequently. Involves mixing a commercial coil cleaner, attaching hoses, pouring cleaner into the pump inlet, and running the pressure washer in cold mode for 1-3 hours to recirculate the cleaning solution.
Inspect and Desoot Coil: Annually. Requires protective clothing, disconnecting hoses, removing the lid and insulation, hoisting out the coil (125 lbs), cleaning, and reassembling.
Inspect/Clean Flow Switch: Disconnect the swivel fitting, remove the "Cap" fitting, slide out the "Shuttle Assembly" to check for damage or debris. Clean if necessary. Reassemble, ensuring proper torque.
Inspect Electrodes: Yearly. Remove nuts, pull burner out, clean carbon deposits, and reset spacing as shown in the manual.

Storage:

Location: Store in a clean, dry place, away from heat, open flames, sparks, or pilot lights. Avoid extreme temperatures.
Freezing Conditions (Short Term - less than 30 days): Drain water from the heating coil and plumbing. Pour RV antifreeze into the pump inlet and run the starter until antifreeze comes out of the pump outlet.
Long Term (more than 30 days): Prepare fuel system for storage by draining gasoline or adding fuel stabilizer. Lubricate cylinder and piston by adding oil through the spark plug hole. Disconnect the battery, hoses, and spray gun. Store in a cool, dry place. Allow engine to cool for at least 5 minutes before moving to storage.

This comprehensive manual ensures users can safely and effectively operate and maintain their NorthStar M157310AR pressure washer for optimal performance and longevity.