North Star 1574210 User manual

1
M1574210B
Owner’s Manual
Electric Hot Water/Steam Pressure Washer
Instructions for Set-up, Operation, Maintenance & Storage
Portable Outdoor –Use Only
This pressure washer produces both cold and hot water high-pressure spray as well as wet steam. Cleaning
chemicals may be incorporated into the spray if desired. The pressure pump for this equipment is powered
by an electric motor and the water is heated by a diesel, kerosene/fuel-oil fired, down draft burner.
WARNING: SPECIAL HAZARDS
•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 and burner, as well as hot exhaust from the 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: Burner sparking can ignite fuel or other flammable liquids or vapors in the vicinity. Hot exhaust from 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.
•Electrocution: Improper connection of the equipment or grounding conductor can result in a risk of electrocution.
•CO Poisoning: Exhaust from burner contains carbon monoxide, a poisonous gas that can cause carbon monoxide poisoning
and possible death if inhaled.
Equipment Protection Quick Facts
Inspect Upon Delivery: STOP! Closely inspect to make sure no components are missing or damaged. For missing
or damaged components please contact Product Support at 1-800-270-0810.
Check Pump Oil: Pump is shipped with oil. Check pump oil level before starting.
-Remove shipping tape and black vent plug (if present) from pump oil fill cap (CAT Pumps)
-Pump is supplied with Vented fill cap (General Pumps only)
Water Flow Requirements: Make sure your supply water flow rate is 20% higher than the pressure washer’s flow
rate (See Specification Section for unit specific flow rates), and that your water is clean and particle free.
Chemical Spraying: Use only NorthStar brand or equivalent washer chemicals designed for pressure washer use.
Maintenance Schedule: Pump, burner fuel filter, burner coil and electrodes require periodic checking and servicing
to keep pressure washer functioning efficiently. See “Maintenance & Repair”for frequency of servicing.
Any Questions, Comments, Problems or Parts Orders
Call NorthStar Product Support 1-800-270-0810
ITEM NUMBER: 1574210, 1574211,
1574212, 1574213
SERIAL NUMBER: _____________

2
Table of Contents
Equipment Protection Quick Facts .............................................................................................................................................................1
TABLE OF CONTENTS................................................................................................................................................................. 2
ABOUT YOUR PRESSURE WASHER.......................................................................................................................................... 4
SPECIFICATIONS ......................................................................................................................................................................... 5
COMPONENT IDENTIFICATION................................................................................................................................................... 6
SPECIAL EQUIPMENT SAFETY FEATURES .............................................................................................................................. 8
High Pressure Safety Device (Rupture Disc).............................................................................................................................................8
Temperature Sensor..................................................................................................................................................................................8
Spray Gun Safety Latch.............................................................................................................................................................................8
High Pressure Limit Switch........................................................................................................................................................................8
SAFETY ......................................................................................................................................................................................... 9
Hazard Signal Word Definitions.................................................................................................................................................................9
SAFETY DECAL LOCATIONS .................................................................................................................................................... 10
ASSEMBLY AND INITIAL SET-UP ............................................................................................................................................. 11
Step 1. Inspect & Unpack ...........................................................................................................................................................................11
Step 2. Assembly ........................................................................................................................................................................................11
Step 3. Initial Pump & Motor Preparation .................................................................................................................................................11
Prepare Water Pump ...............................................................................................................................................................................11
Step 4. Verify Electrical Connection..........................................................................................................................................................12
Grounding ................................................................................................................................................................................................12
Ground Fault Circuit Interrupter Protection ..............................................................................................................................................12
Extension Cord ........................................................................................................................................................................................12
Step 5. Moving and Handling.....................................................................................................................................................................13
Moving your pressure washer around......................................................................................................................................................13
BEFORE EACH USE ................................................................................................................................................................... 14
Step 1: Inspect Equipment........................................................................................................................................................................14
Electrical ..................................................................................................................................................................................................14
Pump Oil ..................................................................................................................................................................................................14
Spray System...........................................................................................................................................................................................14
Burner Fuel System (if heated water to be used) ....................................................................................................................................14
Periodic Maintenance ..............................................................................................................................................................................14
Step 2. Check and Fill Burner Fuel Tank .................................................................................................................................................14
Filling Burner Fuel Tank (if heated water to be used) ..............................................................................................................................15
Step 3. Select Suitable Worksite Guidelines ...........................................................................................................................................15
For All Indoor and Outdoor Uses .............................................................................................................................................................15
For Indoor Hot Water/Burner Use ............................................................................................................................................................15
OPERATION ................................................................................................................................................................................ 17
Step 1. Connect Hoses, Water Supply, and Spray Nozzle ......................................................................................................................17
Attach Garden Hose to Water Supply......................................................................................................................................................17
Check Water Supply ................................................................................................................................................................................17
Connect Water Supply to Pump...............................................................................................................................................................17
Connect Pressure Hose to Pump ............................................................................................................................................................17
Quick Connect Procedure........................................................................................................................................................................17
Select Spray Nozzle.................................................................................................................................................................................17
Attach Nozzle to Spray Gun.....................................................................................................................................................................18
Step 2. Pre-Spraying Procedure ...............................................................................................................................................................18
Safety Rules.............................................................................................................................................................................................18
Personal Protective Gear.........................................................................................................................................................................19
Purging ....................................................................................................................................................................................................19

3
Step 3. Spraying.........................................................................................................................................................................................19
Starting ....................................................................................................................................................................................................19
Spraying Procedure .................................................................................................................................................................................19
Using Chemicals for Cleaning (if desired)................................................................................................................................................19
Hot Spray Procedure ...............................................................................................................................................................................21
Step 4. Stopping.........................................................................................................................................................................................21
STORAGE................................................................................................................................................................................... 22
Between-Use Storage..............................................................................................................................................................................22
Long-Term Storage Preparation (between infrequent uses and at end of season) .................................................................................22
Winter Storage Preparation .....................................................................................................................................................................22
MAINTENANCE & REPAIR ......................................................................................................................................................... 24
MAINTENANCE SCHEDULE ...................................................................................................................................................... 24
DETAILED INSTRUCTIONS –MAINTENANCE & REPAIR ....................................................................................................... 24
Dust/Debris Removal ...............................................................................................................................................................................24
Inspect Fuel System(s) ............................................................................................................................................................................24
Inspect Spray System..............................................................................................................................................................................24
Clean Inlet Filter for Garden Hose ...........................................................................................................................................................25
Check Tire Pressure ................................................................................................................................................................................25
Change Pump Oil.....................................................................................................................................................................................25
Drain Burner’s Fuel Filter/Water Separator..............................................................................................................................................25
Descale Heating Coil ...............................................................................................................................................................................25
Inspect and clean the flow switch as needed...........................................................................................................................................27
Inspect Heating Coil and Desoot as Needed ...........................................................................................................................................28
Inspect/Clean/Adjust Electrodes..............................................................................................................................................................29
Perform Engine Maintenance ..................................................................................................................................................................30
OIL BURNER ADJUSTMENT (ONLY NEEDED IF WHITE EXHAUST SMOKE APPEARS) ..................................................... 31
TROUBLESHOOTING ................................................................................................................................................................. 32
MAJOR COMPONENTS.............................................................................................................................................................. 34
PARTS EXPLOSION: FRAME..................................................................................................................................................... 35
PARTS LIST: HEAT EXCHANGER............................................................................................................................................. 39
PARTS EXPLOSION: ACCESSORIES: - GUN, HOSE, CHEMICAL INJECTOR....................................................................... 44
PUMP EXPLODED-GP EVO-O.................................................................................................................................................... 45
PUMP EXPLOSION-CAT 4DX..................................................................................................................................................... 48
PUMP EXPLOSION-GP EP1812 PUMP...................................................................................................................................... 52
WIRING DIAGRAM - 1574210..................................................................................................................................................... 54
WIRING DIAGRAM - 1574211..................................................................................................................................................... 55
WIRING DIAGRAM –1574212 & 13............................................................................................................................................ 56
SUMMARY OF IMPORTANT SAFETY INFORMATION ............................................................................................................. 57
LIMITED WARRANTY ................................................................................................................................................................. 62
CALIFORNIA PROPOSITION 65 INFORMATION ...................................................................................................................... 64

4
About Your Pressure Washer
Thank you for purchasing a NorthStar hot water
pressure washer! It is designed for long life,
dependability, and top performance.
Intended Use. Washing siding, windows, walkways,
driveways, patios, decks, fences, vehicles, boats,
lawnmowers, ATVs and other equipment by:
•Producing a high-pressure water spray (heated or
unheated).
•Incorporating cleaning chemicals into a low-
pressure water spray.
Note: Do not use for other purposes, as unforeseen
hazards or equipment damage may result.
Water Supply. The pump requires a clean, standard tap
water supply provided through a garden hose at a flow
rate 20% higher than the pressure washers flow rate.
Use of a backflow preventer on the water supply hose is
recommended and may be required by local code.
Chemical Usage. Any cleaning chemicals that are used
must be specifically approved for use in pressure
washers.
Power Source. The pump is powered by an electric
motor. The spray water is heated (when desired) by a
diesel, kerosene/ fuel oil fired, spark-ignited, down draft
burner.
Supplies Required. Normal operation will require you
to supply:
•Electric supply
•Personal Protection Equipment
•Pump Oil
•Fuel for the burner (diesel, kerosene, or fuel oil)
See “Specifications”section of this manual for more
detail.
Site Selection. Pressure washers used while the open
flame burner is used to heat the water are for
OUTDOOR USE ONLY unless specific exhausting
guidelines are met. Read additional details in the
“Before Each Use”section of this manual.
Personal Protection. Wear safety apparel during
operation, including waterproof insulated gloves, safety
glasses with side and top protection, and non-slip
protective footwear. Some cleaning chemicals may
require the use of a respirator mask (as instructed on
chemical label).
Adult control only. Only trained adults should set up
and operate the pressure washer. Do not let children
operate. Pressure washers can generate forces greater
than children can control and require judgment beyond
what can be expected of them.
Under The Influence. Never operate, or let anyone else
operate, the pressure washer while fatigued or under
the influence of alcohol, drugs, or medication.
Keep this manual for reference and review. A summary
of important safety information can be found at the end
of the manual.
Proper preparation, operation, and maintenance of this
pressure washer will result in optimal performance and a
long life for this equipment. For detailed Motor operation
and maintenance information, always refer to the Motor
Owner’s Manual furnished with the pressure washer.
ATTENTION: Rental Companies and Private
Owners who loan this equipment to others!
All persons to whom you rent/loan this pressure washer
must have access to and read this manual. Keep this
owner’s manual with the pressure washer at all times
and advise all persons who will operate the machine to
read it. You must also provide personal instruction on
how to safely set-up and operate the pressure washer
and remain available to answer any questions a
renter/borrower might have. Owner’s Manuals are
available from NorthStar at 1-800-270-0810.

5
Specifications
MODEL
Model #
1574210
1574211
1574212
1574213
FLOW OUTPUT
Pressure Rating
1700 psi
2000 psi
2750 psi
2000 psi
Flow Rate
1.5 gpm
1.5 gpm
2.5 gpm
4.0 gpm
Minimum Water Supply
Flow Rate
1.8 gpm
1.8 gpm
3.0 gpm
4.8 gpm
Maximum Temperature
250F
MOTOR
Dedicated NEMA
Receptacles
NEMA-5-20R
NEMA-5-20R
NEMA-6-30R
NEMA-6-30R
Motor Horsepower
1.5HP
2.0HP
5.0HP
6.2HP
Amps
20A
20A
30A
30A
Volts
120V
120V
240V
240V
DIMENSIONS/COMPONENTS
Length
46”
Width
32”
Height
38”
Weight (fueled)
367 lbs.
369 lb.
417 lb.
451 lb.
Pump Model
GP EVO
Cat 4DX
CAT 4DNX
GP EP1812
Pump Oil Capacity
4.7 oz
8.5 oz
8.5 oz
15.0 oz
Nozzle Orifice Size
#2.0
#2.0
#3.0
#5.5
SUPPLIES REQUIRED (not included)
Burner Fuel
#1 or #2 Diesel, B5 or lower Biodiesel, Kerosene, or Fuel Oil
(Capacity: 5 gal.)
Pump Oil
(shipped with oil, but
refills required)
SAE 30 Non-
Detergent Oil or
Pressure washer
Pump Oil (Part#
4043)
SAE 30 Non-
Detergent Oil or
Cat Pump Oil
(Part# 22158)
SAE 30 Non-
Detergent Oil or
Cat Pump Oil
(Part# 22158)
SAE 30 Non-
Detergent Oil or
Pressure
washer Pump
Oil (Part# 4043)
Input Water Supply
Standard tap water @ 20-75 psi, delivered @
1.8 gpm
1.8 gpm
3.0 gpm
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.)

6
Component Identification
Ref #
Description
Ref #
Description
Ref #
Description
1
High PSI limit switch
10
High Pressure Outlet
19
Heat Switch
2
Flow Switch
11
Fuel Filter/Water Separator
20
Temperature Sensor
3
Heating Coil
12
Heat Exchanger
21
Nozzle Storage
4
Garden Hose Water Inlet
13
GFCI Cord
22
Thermal Relief Valve
5
Pump
14
Spray Gun
23
Blower Assembly
6
Diesel Fuel Tank
15
Grip
24
Rupture Disc Fitting
7
Diesel Fuel Cap
16
Wand
25
Flame Sensor
8
Unloader
17
Control Box (See Detail A)
26
Quick Connector
9
Motor
18
Power Switch
27
Total Start/Stop Switch
1
3
20
9
6
SEE DETAIL A
13
25
DETAIL A
SEE DETAIL B
7
11
8
5
4
SCALE 1.200
22
DETAIL B
12
17
SEE DETAIL C
21
10
19 18
DETAIL C
SEE DETAIL D Fig.1574210_1
224
DETAIL D
BLOWER ASSEMBLY
23
BURNER FUEL PUMP
14
15
16
26
27

7
Component identification
1. High, PSI limit switch: This is a backup safety
feature, if the system pressure exceeds the set
pressure this device will stop the burner from firing.
2. Flow Switch: Mechanical device that senses water
flow.
3. Heating Coil: Steel piping wound together with an
inlet for incoming cold water and outlet for hot
water to exit.
4. Garden Hose Water Inlet: Connection point for
standard garden hose. Garden hoses less than
100’ in length must have a minimum inner diameter
of 5/8.” Garden hoses over 100’ in length must
have a minimum inner diameter of 3/4.”
5. Pump: A device that moves fluid through a
combination of suction and displacement.
6. Diesel Fuel Tank: Fuel storage container for diesel
fuels.
7. Diesel Fuel Cap: Vented cover for fuel tank.
8. Unloader: Valve that regulates pressure and
directs flow into bypass when trigger is closed.
9. Motor: Electric motor powers the pump.
10. High Pressure Outlet: Connection point for the
high-pressure hose.
11. Fuel Filter / Water Separator: Filter in fuel line
that removes water and screens out dirt and debris
from fuel.
12. Heat Exchanger: Device that heats the water by
forcing a flame across steel pipe.
13. GFCI Cord: Device provides additional protection
form the risk of electric shock.
14. Spray Gun: Used to divert water out to nozzle.
15. Grip: Section of wand to extend length and provide
stability.
16. Wand: Rod to extend length.
17. Control Box: Housing device for mounting
switches and machine controls.
18. Power Switch: Device for protecting circuit from
damage if overloaded or shorted.
19. Heat Switch: Control Device that limits the water
temperature.
20.Temperature Sensor: Control Device that limits
the water temperature.
21.Nozzle Storage: A space for storing nozzles.
22. Thermal Relief Valve: Valve protects pump from
overheating.
23. Blower Assembly: System provides air, fuel, and
ignition for combustion.
24. Rupture Disc: Safety device that will open and
relieve excess system pressure.
25. Flame Sensor: Device for sensing if the burner
has a flame.
26. Quick Connector: Connection point on spray gun
for high pressure hose.
27. Total Start/Stop Switch: Automatically shuts
motor off when not spraying.
Note: See “Parts Explosion” for additional detail.

8
Special Equipment Safety Features
This unit is equipped with the following safety features:
High Pressure Safety Device (Rupture Disc)
Acts as a backup safety feature. If the Pressure Control
Valve (Unloader) malfunctions, this separate high-
pressure safety device will open and relieve excess
system pressure. Repair is required.
WARNING: Rupture Disc failure
If the high-pressure safety device ever discharges
water, turn the motor off and do not use the machine.
Call Product Support at 1-800-270-0810.
Temperature Sensor
Measures water temperature and automatically turns
burner off when temperature setting is reached. When
water temperature drops, burner automatically
reignites.
Pump Thermal Relief Valve
This unit is equipped with a thermal relief valve to
protect the pump from overheating. The pump
continues to work in bypass mode when you are not
spraying. If high temperatures are developed during
bypass mode, the thermal relief valve will open and
discharge hot water onto the ground, protecting the
pump from overheating. The thermal relief valve is
located on the pump manifold’s low-pressure port.
Spray Gun Safety Latch
Has a built-in trigger safety latch to guard against
accidental trigger actuation.
High Pressure Limit Switch
Acts as primary safety feature. If the system pressure
exceeds the set pressure limit this device will stop the
burner from firing.
Fig.1574210_R
High
Pressure
Rupture Disc
00417
Safety Latch
HIGH PRESSURE LIMIT SWITCH
Fig06830
TEMPERATURE SENSOR
Fig06831

9
Safety
Hazard Signal Word Definitions
DANGER
WARNING
CAUTION
CAUTION
NOTICE
This is the safety alert symbol. It is used to alert you to
potential personal injury hazards. Obey all safety
messages that follow this symbol to avoid possible injury
or death.
DANGER (red) indicates a hazardous situation, which if
not avoided, will result in death or serious injury.
WARNING (orange) indicates a hazardous situation,
which if not avoided, could result in death or serious
injury.
CAUTION (yellow), used with the safety alert symbol,
indicates a hazardous situation, which if not avoided,
could result in minor or moderate injury.
CAUTION (yellow), without the safety alert symbol, is
used to address practices not related to personal injury.
NOTICE is used to address practices not related to
personal injury.

10
Safety Decal Locations
Always make sure safety labels are in place and in good condition. If a safety label is missing or not legible, order
new labels or unsafe operation could result. To order replacement safety labels, call NorthStar Product Support at
1-800-270-0810.
Ref#
Part#
Description
Qty
1
782325
Decal, Danger and Warning
1
2
786632
Decal, Rotating Equipment Warning
1
3
3.1
798057
32821
Hangtag, Rupture Disk Warning
Lanyard, Hangtag Warning
1
1
4
797513
Decal, Burn Hazard Decal
1
5
802203
Decal, Descaling Warning
1
6
778070
Decal, Cord Warning
1
7
802940
Decal High Pressure Spray Hazard
1
8
NA
Decal, Serial Number
1
-A-
Fig.1574210_2
2
1
4
33.1
5
6
7
8
-A-
Fig.1574210_2
2
1
4
33.1
5
6

11
Assembly and Initial Set-Up
Step 1. Inspect & Unpack
Inspect the pressure washer immediately after you
receive delivery for missing parts or damage. Find and
separate components identified in Fig.1574210_3 and
Figure 1574210_4.
•For missing or damaged components, contact Product
Support at 1-800-270-0810.
Fig.1574210_3 –Pressure Washer Components
Fig.1574210_4 –Parts to be installed
Step 2. Assembly
You must assemble your pressure washer before it can
be used. Refer to Fig.1574210_5 and follow the steps
listed below:
•Install handle with six (6) 5/16"-18 x 3/4" Flange
bolts through base and handle and secure with
six (6) 5/16"-18 Flange bolts.
•Install Hose Hook into right side of handle using
two (2) M8 Nuts.
•Install GFCI Cord Hook into right side of handle
using two (2) M8 Nuts.
•Install Nozzles into designated nozzle storage
location.
Step 3. Initial Pump & Motor Preparation
Prepare Water Pump
Verify pump oil level. Refer to Fig.1574210_6 and follow
the steps listed below.
NOTE: The Pump is shipped with oil.
•Remove shipping tape and black vent plug (if
present) from oil fill cap.
•Verify that oil level is halfway up the sight glass.
•If oil level is low, use the oil type from below table.
See page no.13.
High Pressure Hose
Qty-1
799880
Spray
Gun
Qty-1
779165
Lance
Qty-1
791278
Handle Weldment
Qty-1
800080
Pressure Washer
Fig.1574210_3
Spray Gun
Qty-1
777420
Lance
Qty-1
777421
Hardware Bag
Only For 1574213
Fig.1574210_5
INSTALL HOSE
HOOK
INTO HANDLE
USING TWO (2)
M8-1.25
NYLOC NUTS
INSTALL GFCI CORD
HOOK
INTO HANDLE
USING TWO (2)
M8-1.25
NYLOC NUTS
5/16-18 X
3/4" SIX
(6)
FLANGE
BOLTS
5/16-18 X
3/4" SIX
(6)
FLANGE
NUTS
INSTALL
NOZZLES
INTO
DESIGNATED
NOZZLE
STORAGE
LOCATION

12
Assembly and Initial Set-Up
Step 4. Verify Electrical Connection
Grounding
Product must be grounded. The supply cord is equipped
with an equipment-grounding conductor and a
grounding plug. This plug must be plugged into an outlet
that is properly installed and grounded in accordance
with all local codes and ordinances.
Ground Fault Circuit Interrupter Protection
Connecting the pressure washer through some type of
ground fault circuit interrupter (GFCI) protector is
required to comply with the National Electric Code
(NFPA 70) and to provide additional protection from the
risk of electric shock.
Note: Before use, your GFCI should be tested
at either built-in or receptacle base.
1. This Product is provided with a ground fault
circuit interrupter built into the power cord or
plug. if replacement of the ground fault circuit
interrupter or cord is needed, use only identical
replacement parts
DANGER: Electrocution hazard
Improper connection of the equipment or grounding
conductor can result in a risk of electrocution. Check
with qualified electrician or service personnel if you are
in doubt as to whether an outlet is properly grounded.
Do not modify the plug provided with the product. If it
will not fit the outlet, have a proper outlet installed by a
qualified electrician. Do not use any type adapter with
this product.
Extension Cord
This appliance cord is equipped with a GFCI, do not use
extension cords. If the appliance cord is not equipped with a
GFCI, the appliance and any extension cord used should be
connected only to a GFCl-protected power source.
1. Use only extension cords that have grounding-type
plugs and female cord connectors that accept the plug
from the product.
2. Use only extension cords that are intended for
outdoor use. These extension cords are identified on the
packaging or on the cord by a marking "Acceptable for
use with outdoor appliances; store indoors while
not in use."
3. Use only extension cords having an electrical rating
not less than the rating of the product.
4. Do not use a damaged extension cord. Examine
extension cord before using and replace if damaged.
5. Do not abuse extension cord and do not yank on a
cord to disconnect.
6. Keep cord away from heat and sharp edges.
7. Always disconnect the extension cord from the
receptacle before disconnecting the product from the
extension cord.
WARNING
To reduce the risk of electrocution, use only a GFCI-
protected extension cord or plug into GFCI outlet. Keep
all connections dry and off the ground. Do not touch
plug with wet hands.
fill cap
sight glass
drain plug
Oil capacity: 4.7 oz. (.13 L)
GP EVO Pump (For 1574210)
GP EP1812 Pump (For 1574213)
Oil capacity: 15 oz. (.44 L)
sight glass
drain plug
fill cap
Cat 4DX AND 4DNX Pump
(For 1574211 & 12)
Oil capacity: 8.5 oz. (.25L)
Fig.1574210_6
fill cap
drain Plug Sight Glass

13
Assembly and Initial Set-up
Step 5. Moving and Handling
WARNING: Lifting hazard
The pressure washer is heavy. It can crush and cause
serious injury if it rolls out of control or tips over. Follow
the instructions below for safely moving the pressure
washer.
Moving your pressure washer around
•Use handle to manually move pressure washer.
•To turn, push down slightly on handle and pivot
pressure washer on its back wheels. Do not move or
operate crosswise on a slope. High center of gravity
can cause tipping.
•Lock wheels with brake to prevent inadvertent
movement.
•Never pull by hose. Do not move this machine by
pulling on the hose. Hose or connections could fail
and result in catastrophic high-pressure release of
fluid as well as hose whipping.
To reduce risk of injury, do not attempt to manually
lift the pressure washer. Use a shallow ramp to raise
or lower pressure washer to a different elevation.
Fig.1574210_7
HANDLE

14
Before Each Use
Follow the steps below prior to each use.
Step 1: Inspect Equipment
Electrical
•Inspect cord before using. Do not use if cord is
damaged.
•Connect only to properly grounded outlet.
•Keep all connections dry and off the ground.
•Do not touch plug with wet hands.
•If product is provided with a GFCI built into the
power cord plug, use only identical parts if
replacement is necessary.
Pump Oil
•Check oil level with sight glass (or dip stick). If low,
add type of oil indicated below.
•Replace oil fill cap after any additions.
Spray System
Because of the high-pressure fluid hazards, a special
check must be made before each use to look for signs
of wear, cracks, looseness or leaks in the hoses, fittings,
wand, trigger gun and connections. See special
instructions for checking and repairing high-pressure
hoses within the “Maintenance & Repair” section.
•Check and clean nozzle orifice.
•Clean garden hose water inlet filter. (See
Maintenance instructions.)
WARNING: High pressure fluid injection
hazard
High-pressure fluid discharge from leaks (even pin-
sized) or ruptured components can pierce skin and
inject fluid into the body. Injection injury can result in
blood poisoning and/or severe tissue damage leading to
infection, gangrene, and possibly amputation.
WARNING: Respond to fluid injection
immediately
If injured by high-pressure fluid, no matter how small
the wound is, see a doctor at once. A typical injection
injury may be a small puncture wound that does not
look serious. However, severe infection or reaction can
result if proper medical treatment is not administered
immediately by a doctor who is familiar with injection
injuries.
•Never use a finger or skin to check for leaks.
•Never operate machine with damaged or missing
hoses/parts.
•Never attempt to repair a high-pressure hose or
component –always replace it with part that is
rated at or above the pressure rating of this
machine.
Burner Fuel System (if heated water to be
used)
Inspect Burner fuel system for leaks BEFORE starting
pressure washer. Look for:
•Signs of leaks, wetted areas, or deterioration
•Chafed or spongy fuel hose
•Loose connections
•Loose or missing fuel hose clamps
•Damaged fuel tank
WARNING: Fuel leak hazard
Burner fuels are highly flammable and fuel leaks can
result in fire or explosions. You can be burned and
seriously injured if there is a fuel leak when you start
the pressure washer.
Periodic Maintenance
Other periodic maintenance is listed within the
“Maintenance & Repair” section.
Note: Do not start pressure washer until all
needed repairs have been completed.
Step 2. Check and Fill Burner Fuel Tank
If you are planning to use heated water, check level of
burner fuel tank. If fuel is needed, use #1 or #2 diesel,
B5 or lower biodiesel, kerosene or fuel oil. Use these
precautions each time you fill:
1. Regularly inspect fuel systems for leaks.
2. Fill fuel tank OUTDOORS- never indoors, and
stay away from all sources of heat, sparks and
flames.
3. Use an UL approved portable container to
transfer fuel to machine.
CAUTION
Pump
Model
Oil Type
GP EVO
1574210
SAE 30 Non-Detergent Oil or
Pressure Washer Pump Oil
(Part# 4043)
GP
EP1812
1574213
CAT 4DX
1574211
SAE 30 Non- Detergent Oil
or
Cat Pump Oil part # 22158
CAT 4DNX
1574212
Never run the pump without sufficient lubrication!

15
Before Each Use
Filling Burner Fuel Tank (if heated water to
be used)
WARNING: Flammability hazard
Burner fuels are highly flammable. Turn the machine off
and allow it to cool for at least 2 minutes before
removing fuel cap; as a running or still hot burner is hot
enough to ignite fuel.
After Machine Has Cooled:
1. Remove burner fuel cap.
2. Add fuel through the fill opening. Do not overfill.
Allow at least 1/2” of empty space below fill neck
to allow for fuel expansion.
3. Replace fuel cap securely before starting burner.
4. Clean up fuel spills/splashes immediately.
•If possible, move the machine away from
spilled fuel on the ground.
•Wipe up spilled fuel and wait 5 minutes for
excess fuel to evaporate before starting
burner.
•Fuel soaked rags are flammable and should
be disposed of properly.
•If fuel is spilled on your skin or clothes,
change clothes and wash skin immediately.
5. Store extra fuel in a cool, dry place in an UL-
approved, tightly sealed container.
Step 3. Select Suitable Worksite Guidelines
WARNING: Location hazard
You must choose a suitable site for operating your
pressure washer to avoid equipment damage and/or
injury and possible death from carbon monoxide
poisoning, fire/explosion, uncontrolled equipment
movement/tip over, or slips and falls. While designed
primarily for outdoor usage, this electric powered
pressure washer may be used inside large commercial
buildings if special additional precautions are taken.
See below.
For All Indoor and Outdoor Uses
Placement of the Machine:
•Where it will NOT be exposed to rain, snow, or
direct sunlight. Exposure to water can cause
electric shock.
•Where no flammable vapors, dusts, and gases
are present.
•At least 7 feet away from combustible materials
(when burner used).
•Away from all building windows and air intakes
(when burner used).
•Away from other heat-generating equipment.
Positioning:
•The pressure washer should be positioned on a
firm, level (less that 3-degree slope), heat
resistance surface with good drainage and a
nearby water supply.
•Ensure that the pressure washer sits level and
will not slide or shift during operation. If
applicable, block the pressure washer’s wheels to
prevent movement. Surface should be heat
resistant if you will be using the burner for heated
spray.
•Block wheels to prevent movement.
Airflow:
•Provide for adequate, unobstructed airflow for
cooling and combustion air.
•Do not allow debris to accumulate or block
airflow.
•Do not operate with a tarp, blanket, or cover
surrounding the machine.
•Do not place any objects against or on top of the
unit.
Electrical Precautions:
•To reduce the risk of electrocution, keep all cord
connections dry and off the ground.
•Do not touch plug with wet hands.
For Indoor Hot Water/Burner Use
Exhaust:
•Hot fumes from burner must be exhausted
through a hood or piped to the outside.
•Place the unit so that the exhaust fumes will not
be directed towards people or building air intakes.
Precautions:
•Keep a fire extinguisher rated “ABC” nearby.
Keep it properly charged and be familiar with its
use.
•Ensure that working, battery-operated or battery
back-up carbon monoxide alarms are used in any
structure that is in close proximity to the running
pressure washer.

16
Before Each Use
•An abundant amount of air must be available for
proper combustion and cooling. Do not install in
small, enclosed areas without an ample
circulation of supply air.
•For more details, refer to NFPA 31: Standard for
the Installation of Oil-Burning Equipment.
Chapter 5 provides guidelines on how to ensure
adequate air is provided for safe combustion.
DANGER: Carbon monoxide poisoning
hazard
Exhaust fumes from the burner contain carbon
monoxide (CO), a poisonous gas you cannot see,
smell, or taste. The CO generated by the pressure
washer can rapidly accumulate, even in areas that
appear to be well ventilated, resulting in dangerous and
fatal concentrations within minutes. ONLY run pressure
washer outdoors and away from air intakes. NEVER run
pressure washer inside any enclosed or semi-enclosed
spaces, including homes, garages, basements, sheds,
boxes, pick-up truck beds, RVs, or boats. These spaces
can trap poisonous gases, EVEN if you run a fan or
open windows. If you start to feel sick, dizzy, or weak
while using the pressure washer, shut off the motor and
get to fresh air RIGHT AWAY. See a doctor. You may
have carbon monoxide poisoning.

17
Operation
Step 1. Connect Hoses, Water Supply, and
Spray Nozzle
Note: The electrical power and pump are both off
during Step 1 procedures.
Attach Garden Hose to Water Supply
1. Acquire a suitable garden hose:
•The water supply garden hose must have an inside
diameter of at least 5/8”. If the hose is more than
100 ft. long, the diameter must be at least 3/4”.
•Always use a flexible rubber hose for your water
supply. Do not use rigid piping.
•The use of a backflow preventer on the supply hose
is recommended and may be required by local code.
2. Attach garden hose to water supply.
Check Water Supply
•Make sure the water supply is clean. Debris can
cause excess pump wear and reduce performance.
•Make sure the water supply is steady and capable of
flowing at a rate 20% over the rated flow of your
pump. An insufficient water supply will damage your
pump. Use a stopwatch to time how long it takes to
fill a 5-gallon bucket with your garden hose. It
should take less than 100 seconds.
Connect Water Supply to Pump
•Confirm rubber washer and inlet filter screen are in
water pump inlet. (See “Component Identification”
section for location of water inlet)
•Run water through garden hose for 30 seconds to
clean out debris. Turn off water.
•Connect garden hose to water pump inlet on
pressure washer and turn on water valve.
Connect Pressure Hose to Pump
Uncoil high-pressure hose. Attach quick connect end of
hose to pressure washer’s water outlet and other end of
high-pressure hose to spray gun by following the “Quick
Connect Procedure” below.
WARNING: Incompatable component
hazard
NEVER operate this pump with components (such as
hose, connections, and spray gun) rated for lower
pressure and/or temperature limits than the machine’s
maximum rated pressure and temperature, or
component will likely rupture and cause serious
personal injury from escaping high pressure fluids.
Quick Connect Procedure
•Pull quick connect collar back (Figure 9a).
•Push hose or nozzle firmly against stop.
•Let go of collar (Figure 9a).
•Pull (hose or nozzle) to assure a tight connection.
Select Spray Nozzle
Five high-pressure nozzles and one low-pressure nozzle
are supplied.
Note: A wider angle produces a lower impact pressure
on surface. Nozzles from other sources may not fit the
coupler and become a hazard.
Color of Nozzle:
Spray
Angle
Used For:
Yellow
15º
Tough
Stains/Stripping
Green
25º
General
White
40º
Light Cleaning
Black (Low Pressure)
65º
Chemicals
Orange
15º
Steam
Correct
Insertion
Not Fully
Inserted
Collar Seated
Collar NOT Seated
Figure 9b Figure 9c
Figure 9a
Collar
Coupler
Water Outlet

18
Operation
Note: Use only the black low-pressure nozzle for
spraying chemicals, which provides the proper mixing
ratio.
Attach Nozzle to Spray Gun
WARNING: Depressurize first
Any time you remove/install/change a nozzle, you
must depressurize hose line by squeezing the
spray gun trigger while the Motor is off. Even if the
Motor has been off for a long period of time, the
hose may remain dangerously pressurized.
1. Make sure the Motor is off and the hose line
depressurized.
2. To install the nozzle, pull the collar back and twist
the nozzle firmly into the coupler on the end of the
wand. (Fig. 10a)
3. Release the collar, making sure it springs back and
re-seats to its original (non-retracted) position. (Fig.
10b). Check the connection by pulling on the
nozzle to ensure a tight connection -- if correctly
inserted, nozzle will rotate but not pull out.
WARNING: Projectile hazard
Sprayer nozzle can become a projectile and cause
serious personal injury or damage if not properly
connected to the spray gun.
Step 2. Pre-Spraying Procedure
Safety Rules
Prevent slips/loss of balance. High-pressure spray
could cause you to lose balance from kickback forces,
and wet surfaces can be slippery.
•Keep good footing and balance at all times.
•Do not overreach.
•Do not stand on unstable support when spraying.
•Use extreme caution when spraying from a ladder
or scaffolding, ensure it is firmly anchored from
sway or tip-over. Use extreme caution to avoid
falling as spray gun kick can propel you off the
ladder or scaffolding.
•Be aware of puddles and slippery surfaces.
Ensure there is adequate drainage to prevent
pooling of water.
Keep spray away from electrical wiring. Spray
contact with electrical wiring will likely result in severe
electrical shock or electrocution.
Keep spray away from people. Never direct discharge
stream at or near any person. Do not allow any part of
the body to come in contact with the fluid stream.
Prevent surface damage & flying debris. Surfaces
being sprayed must be strong enough to withstand high-
pressure spray, or damage may result. In addition, high-
pressure spray will dislodge unsecured objects, surface
chips, and debris, resulting in hazardous flying objects
that can cause personal injury or property damage. Do
not spray brittle surfaces or breakable, fragile,
unsecured objects, such as:
•Stucco or laminar flagstone
•Some painted surfaces
•Windows or glass doors (because they may
break)
•Light fixtures, flowerbeds, mailboxes
•Unsecured, lightweight objects
Figure 10a
Nozzle
Trigger
Figure 10b
Nozzle
Collar
Coupler
Lance
Collar
seated
Collar NOT
seated
Correct
Insertion
Not Fully
Inserted

19
Operation
Prepare to wash small parts in a basket so the pressure
does not push them away. Clamp down larger,
lightweight parts.
Personal Protective Gear
WARNING: High pressure spray hazard
•High pressure spray can cause injection injury, eye injury, and
loss of balance. Serious injury could result from unintentional
release of high-pressure spray from the gun upon engaging the
trigger.
•ALWAYS turn power switch to OFF position and relieve system
pressure when leaving pressure washer unattended.
•Total Start/Stop feature allows temporary motor shut-off (STOP)
when the trigger is disengaged and allows motor turn-on
(START) when the trigger is reengaged. This feature should
NEVER be used to shut-off pressure washer when not in use.
When operating the machine, wear:
•Waterproof, thermally insulated gloves
•Safety glasses with side and top protection
•Protective clothing
•Non-slip, protective footwear
•Respirator or mask to avoid inhalation of vapors if
directed on the chemical label (if spraying
chemicals).
Purging
Note: Pressure washer will first be purged using
water supply pressure only, not pressure washer
pump. Do not plug electric pump in yet.
•Turn on water supply.
•Disengage safety latch and squeeze trigger to attain
a steady stream of water. This purges the pump of
air and impurities.
•To prevent accidental spraying, engage the safety
latch on spray gun trigger by rotating it to the locked
position.
Step 3. Spraying
•Make sure you have attached the appropriate spray
nozzle.
•Clear the cleaning area of all persons. Keep
children and pets away.
Starting
•Plug unit into a grounded outlet. Press RESET on
the GFCI (if applicable).
•Start motor to power the pump by turning Power
Switch ON.
Spraying Procedure
•Never run the machine without sufficient pump oil
or sufficient water to cool the pump.
•Hold the spray gun firmly with two hands and a
sturdy stance (gun kicks back when triggered).
•Nozzle should be 12” to 24” from the work, closer
for tough areas.
•Disengage safety latch and start spraying at the
top using long, even, side-to-side, overlapping
passes.
•The pressure washer is set and locked to the
maximum rated pressure when it leaves the
factory. To reduce the pressure, turn the Unloader
knob counterclockwise (Fig.1574210_9).
•If temporarily stopping, interrupting spray, rotate
trigger safety latch downward to the locked
position to guard against accidental trigger
release.
Note: Do not attempt to secure the spray gun open by
blocking or tying the spray gun in the on position.
Uncontrollable hose whipping can occur if grip is lost.
•Always turn off the motor by turning Power switch off
and then activate spray gun trigger to relieve system
pressure when:
•The sprayer is unattended, or when
•Disconnecting hoses, installing/cleaning
nozzles, or servicing the pump.
Using Chemicals for Cleaning (if desired)
Use only NorthStar pressure washer chemicals or
chemicals specifically formulated for use with pressure
washers. Don’t use acids, corrosives, or abrasive or
flammable liquids. Breathing hazards, surface
burns/corrosion, or fire/explosion could result.
Follow the Chemical Manufacturer’s Label Instructions
When Handling or Spraying Chemicals:
•Understand all safety hazards and first aid for all
chemicals being used.
0041
7
Safety
Latch
Fig.1574210_9
UNLOADER UNLOADER
UNLOADER
FOR 1574210 FOR 1574211, 12
FOR 1574213
Figure 11

20
Operation
•Wear protective gear as directed. Always wear
protective gloves when handling and cleaning.
•When cleaning filters, check whether dangerous
chemicals have been used with the filter and take
any precautions that may have been
recommended by the supplier of these chemicals.
•Always dispose of hazardous fluids per local,
state, and national guidelines.
CAUTION: Chemical mixture
The special NorthStar braided chemical hose when
placed within a liquid and attached at the pump’s
chemical injection port will inject 1 part chemical to 15
parts water. Chemicals must be pre-diluted in
accordance to instructions to accommodate the
additional 15:1 dilution ratio which will occur in the
pump.
Chemical Spraying Preparation:
•Prepare (dilute) cleaning solution as required for
the job. (Recall that this chemical solution will be
automatically mixed in the pump with water at a
ratio of 15 parts water to 1 part diluted chemical
solution.)
•Press braided chemical hose over the pump’s
chemical injector.
•Submerge suction strainer connected to braided
chemical hose into chemical solution bucket.
•Make sure the BLACK nozzle is attached to spray
wand before beginning to spray chemicals –
High-pressure nozzles cannot apply chemicals.
•Warm or cold water can be used. If warm water is
specified on chemical label, start burner
according to the instructions in the following
section, “Hot Spray Procedure.”
Chemical Spraying Procedure:
•Disengage safety latch and apply chemicals
evenly to the cleaning surface working from
bottom upward, using long, even, and overlapping
passes.
•Allow chemicals time to react with dirt before
rinsing. Do not allow the chemical to dry on,
reapply as needed to prevent surface from drying.
Rinsing:
•Change to a high-pressure nozzle for rinsing.
Changing to a high-pressure nozzle will
automatically stop the flow of chemicals into the
water stream.
•Rinse with high-pressure spray, either hot or cold.
•Turn heat switch ON and adjust thermostat to
desired temperature. (For steam spraying, set
temperature at 212F or higher and use
YELLOW nozzle.)
•Burner will only fire as trigger is squeezed –
follow instructions for spraying.
FOR 1574213
Fig.1574210_8
FOR 1574211 & 12
FOR 1574210
PUMP
INLET
PUMP
OUTLET
PUMP
DILUTED
CHEMICAL
STRAINER
PUMP
PUMP INLET DILUTED
CHEMICAL
STRAINER
HIGHPRESSURE
OUTLET
CHEMICAL
INJECTOR
DILUTED
CHEMICAL
STRAINER