NorthStar M157310K.1 Maintenance Manual

®

M157310K.1

ITEM NUMBER: 157310

SERIAL NUMBER:

Engine Model:
Pump Model:
Flow:
Hose Length:

Nozzle Size:

Pressure:
Lance Length:

Installation, Operation, and Maintenance Manual

HOT WATER PRESSURE WASHER: Cleans dirty surfaces with high

pressure hot water.

To the Owner:

Thank you for purchasing a NorthStar hot water pressure washer. Your machine is designed for long life,
dependability and the top performance you demand! Take time now to read through this manual so you better
understand the machine’s operation, maintenance and safety precautions. Everyone who operates this machine
must read and understand this manual. The time you take now w ill prolong your machine’s life and prepare you
for its safe operation. Enjoy the exceptional performance of your NorthStar hot water pressure washer, the
industry leader! The manufacturer reserves the right to make improvements in design and/or changes in
specifications at any time without incurring any obligation to install them on units previously sold.

Quick Facts

Engine Oil Engine is shipped without oil. Fill before starting.

Use SAE 10W-30 motor oil.

Pump Oil Pump is shipped with oil. Remove shipping tape and check pump oil level before

starting. Use SAE 30 Non-detergent pump oil (item # 4043) or Cat Pump Oil (item
#22158) for oil changes.

Water Make sure your water flow is 20% higher than the pressure washer’s flow rate.

Make sure your water is clean and particle free.
Storage Do not allow water to freeze in the pump, hose, coil, or spray gun.
Spraying
Chemicals
Maintenance
Schedule

Pump: Oil: change after first 40 hours, then every 3 months or 500 hours.

Use any NorthStar brand or equivalent pressure washer chemicals.

Adjust soap adjustment knob to regulate cleaning power.

Engine: Oil: change after first 20 hours, then annually or every 100 hours.

Spark Plug: clean every 100 hours, replace annually or every 300 hours.
Air Filter: clean every 100 hours, replace annually or every 300 hours.

Read and understand all manuals before operating.

Any Questions, Comments, Problems, or Parts Orders

Call NorthStar Product Support 1-800-270-0810

Table of Contents

Important Safety Instructions 2 Maintenance Instructions 12-15
Specifications 3 Moving and Handling Instructions 17
Machine Component
Identification
Installation Instructions 5-8 Troubleshooting 18
Operation Instructions 9-11 Parts Breakdowns 19-21
Safety Features 12 Electrical Schematic 22-24
Limited Warranty 25

4 Long Term Storage 17

Important Safety Instructions

WARNING -Risk of injection or injury to persons - Do not direct discharge stream at persons. - Do not use

hose if exterior damage is evident.

-Risk of explosion. Do not spray flammable liquids. Do not operate in a flammable environment.
CAUTION -Risk of asphyxiation. Exhaust fumes are deadly. For outdoor use only. Avoid inhaling exhaust

fumes.

-Risk of fire. Do not add fuel when the product is operating or hot.

-Gun kicks back, hold with both hands.

-To reduce the risk of injury, read and understand operating instructions carefully before use.
WARNING - When using this product basic precautions should always be followed, including the following:

1.) Read all the instructions before using the product.

2.) To reduce the risk of injury, close supervision is necessary when the product is used near children. Do
not allow irresponsible use by children. Always stop the product and bleed pressures before leaving
unattended, disconnecting hoses, or servicing the pump.

3.) Know how to stop the product and bleed pressures quickly. Be thoroughly familiar with the controls.

4.) Stay alert - watch what you are doing.

5.) Do not operate the product when fatigued or under the influence of alcohol or drugs. Never smoke while
operating or fueling this machine.

6.) Keep operating area clear of all persons.

7.) Do not overreach or stand on unstable support. Keep good footing and balance at all times. Wear
footwear capable of maintaining a good grip on wet surfaces - Do not place the machine on soft or
unstable ground.

8.) Follow the maintenance instructions specified in all manuals. Do not run machine without sufficient
lubrication or sufficient water to cool the pump.

9.) Wear safety glasses, gloves, face protection and appropriate clothing when operating the machine.

10.) Do not operate this machine with broken or missing parts. - Never alter the manufacturer’s original
design or deactivate any safety device on the machine.

11.) Risk of exposure to dangerous chemicals. Wear protective gloves when handling and cleaning with
chemicals. Follow the chemical manufacturer’s directions. Understand all safety hazards and first aid for
all chemicals being used. Check whether dangerous chemicals have been used and take any
precautions that may have been recommended by the supplier of these chemicals when cleaning filters.
Do not pump highly abrasive fluids or use with incompatible chemicals or solvents.

12.) Know the pressure and temperature limits of your machine. Be sure all high pressure accessories meet
or exceed your machine’s limits. Do not set the pressure relief valve above the machine’s limit.

13.) Do not move this machine by pulling on the hose. Do not use the pump to support other items of
equipment that impose unacceptable loads on the pump. Do not attempt to use this machine as a prop.

14.) To reduce risk of injury, do not secure the spray gun open. Your spray gun is equipped with a built-in
trigger safety latch to guard against accidental trigger release and potentially dangerous high pressure
spray. Rotate the safety latch to the locked position when not spraying.

15.) Do not clean this machine with its own spray. Cleaning should be done with a damp sponge with the
engine OFF.

16.) NEVER attempt to immediately run or re-light the burner if it doesn’t ignite the first time. Unburned oil or
gas may have accumulated causing potential explosion or fire hazard.

17.) Always make sure all switches and controls are in the OFF position prior to starting the engine.

SAVE THESE INSTRUCTIONS

Specifications

ITEM 157310

Pressure Rating 3000 psi

Flow Output 4 gpm

Pump Type Cat 66DX

Water Supply Standard tap water @ 20-75

psi

Engine Horsepower 13 hp

BTU Output 353,700 BTU

Temperature Rise

Maximum Temperature

Approved Fuels #1 or #2 Diesel, Kerosene,

Fuel Capacity 8.5 Gal

Gasoline Capacity 8.5 Gal

Discharge Hose 3/8” X 50’

Dimensions

Length 64”

Width 33”

Height 44”

Weight (shipping) 655 lbs

Weight (dry) 557 lbs

Weight (fueled) 710 lbs

140° F
250° F

Fuel Oil

3

Machine Component Identification

Ref # Description Ref # Description

1 Exhaust Vent 7 Fuel Cap
2 Pump 8 Fuel Tank
3 Battery Box 9 Control Panel
4 Fuel Filter/Water Separator 10 Engine
5 Gas Cap 11 Burner
6 Gas Tank

4

Installation Instructions

I.) Unpack

Your pressure washer is shipped on one pallet. Separate and identify the components and use the assembly instructions
in this manual for assembly.

5

Hardware Bag

r

6X Nozzle

Honda Manual

6X Grommet

Owner’s
Manual

1X Chemical
Injector

4X Wheel

Retaine

4Ft Braided
Hose

4X - 5/16 X 3/4” Flange Bolt

1X Strainer

4X - 5/16 Flange Nut

6

II.) Assembly Instructions

A

LIFT BACK OF UNIT BY HANDLES TO INSTALL
REAR WHEELS, THEN LIFT FRONT OF UNIT TO
INSTALL FRONT WHEELS

INSTALL WHEEL ONTO AXLE
FASTEN WHEEL WITH RETAINER,

SECURE RETAINER WITH WRENCH PROVIDED

NOTE: IT IS RECOMMENDED THAT TWO PEOPLE
LIFT THIS UNIT WHILE A THIRD SLIDES THE
WHEELS ONTO THE AXLES

PRESS BRAIDED HOSE ONTO

INJECTOR AND STRAINER

FASTEN HANDLES TO FRAME WITH
5/16 X 3/4” BOLTS AND 5/16 NUTS

III.) Pump Preparation

A.) Remove shipping tape and make sure the oil is 1/2

way up oil sight glass.

IV.) Engine Preparation

A.) Fill engine with 1.16 qt of oil.
B.) Fill fuel tank with unleaded gasoline, 86 octane min.

Quantities Of Fluid

Engine/Pump Type of Fluid QTY
Honda GX390 SAE 10W30 1.16 qt (1.1L)
Cat 66DX SAE 30** 18oz (0.55L)

**SAE Non-Detergent (Item# 4043)

INSTALL GROMMETS

ND NOZZLES INTO

HOLES IN FRAME

V.) Battery

Warning: Sulfuric acid is a corrosive poison.
Avoid contact with skin, eyes or clothing. Always
wear safety glasses when w orking on or near the
battery.

The battery box provides protection for the battery and
will accept a standard lawn tractor size battery (Group
U1-7). The engine requires a 12-volt battery, with a
minimum rating of 18 Ah (Amp-hour). When installing a
battery, always connect the red colored (“positive” or “+”)
cable first. When disconnecting a battery, always
remove the black colored (“negative” or “-”) cable first.

7

VI.) Getting Started

A

r

IMPORTANT: Proper initial installation of equipment
will assure more satisfactory performance, longer
service life, and lower maintenance cost.

Make sure the pressure washer is on a level surface and
in a protected area where it is not readily influenced by
outside forces such as strong winds, freezing
temperatures, rain, etc. Locate the pressure washer for
easy access for filling fluids, adjustments, and
maintenance.

TEMP

HEAT

CONTROL

HOT WATER

It is recommended that a partition be made between the
wash area and the pressure washer to prevent direct
nozzle spray from coming in contact with the pressure
washer. Moisture reaching the equipment will reduce
the pressure washer’s service life.

VII.) Venting

DANGER: Do not run machine indoors, in an
enclosed area, or in areas where flammable vapors,
(gasoline, solvents, etc.) may be present.

VIII.) Oil Burner

Burner Air Adjustment: The oil burner is preset and
performance tested at the factory (elevation 1100 feet).
Different altitudes may require a one-time initial burner
correction.

ir Band

White
Arrow

Locking

Screw

Burner

1.) Turn the engine and heat switches ON (Refer to
“Operation” for details). Have someone operate the
spray gun so the burner fires.

2.) Loosen the locking screw and close the air band until
black smoke appears from the burner exhaust vent.
Note the position of the white arrow on the air band.

3.) Slowly open the air band until white smoke just starts
to appear.

4.) Turn the air band half way back to the black smoke
position previously noted. Tighten the locking
screw.

5.) Fine tune the burner air by loosening the shutter lock
screw and turning the shutter until the exhaust is
cleanest. Tighten the shutter lock screw.

Shutte

Shutter

Lock Screw

CAUTION: If white smoke appears from the burner
exhaust vent during start-up or operation,
discontinue use and readjust air bands.

8