M157121H.1 ITEM NUMBER: 157121,157122,1571221,157123, 1571231,157124,1571241,157127, 1571271,157130,157132,157133, 157160 SERIAL NUMBER: _____________ Owner’s Manual Pressure Washer: Machine that cleans dirty surfaces with high pressure water. Instructions for Installation/Set-up, Operation, Maintenance, & Storage This pressure washer produces cold-water high-pressure spray. Cleaning chemicals may be incorporated into the spray if desired.
Table of Contents Equipment Protection Quick Facts ........................................................................................................................................ 1 TABLE OF CONTENTS ................................................................................................................................................ 2 ABOUT YOUR PRESSURE WASHER .........................................................................................................................
Clean Inlet Filter .................................................................................................................................................................. 27 Change Pump Oil ................................................................................................................................................................ 28 TROUBLESHOOTING ..................................................................................................................................
About Your Pressure Washer Thank you for purchasing a NorthStar Pressure Washer! It is designed for long life, dependability, and top performance. Site Location. Intended for outdoor use only. Personal Protection. Wear safety apparel during operation, including safety glasses with side and top protection. Ear protection is also recommended if working near any operating engine. Other safety apparel includes waterproof, insulated gloves and non-slip protective footwear.
Specifications 157121 157122 / 1571221 FLOW OUTPUT PSI (bar) FLOW OUTPUT 3100 (207) GPM (I/min) Max Water Temp PSI (bar) 2.5 (9.4) 140° F (60°C) 3100 (207) GPM (I/min) Max Water Temp DIMENSIONS/COMPONENTS 2.5 (9.4) 140°F (60°C) DIMENSIONS/COMPONENTS Length 40.25″ Length 40.25″ Width 26.00″ Width 26.00″ Height 23.75″ Height 23.75″ Pump Model Comet DWD Pump Model Comet DWD 4.3 oz Pump Oil Capacity 4.
Specifications 157127 / 1571271 157130 FLOW OUTPUT FLOW OUTPUT PSI (bar) 4200(276) 3.5 (13.2) GPM (I/min) PSI (bar) GPM (I/min) 140°F (60°C) Max Water Temp 3000 (207) 5.0 (18.9) 165°F (74°C) Max Water Temp DIMENSIONS/COMPONENTS DIMENSIONS/COMPONENTS Length 40.25″ Length 40.25″ Width 26.00″ Width 26.00″ Height 23.75″ Height 23.75″ Pump Model Cat 66DX35 18.
Specifications 157160 FLOW OUTPUT PSI (bar) 3000 (207) 5.0 (18.9) GPM (I/min) 140°F (60°C) Max Water Temp DIMENSIONS/COMPONENTS Length 40.25″ Width 26.00″ Height 23.75″ Pump Model Cat 66DX50 18.
Component Identification Fig06755 1. 2. 3. 4. Handle: Designed for easy cart movement. Pressure Hose: Attach quick couplers to gun and water outlet. Chemical Hose: Submerge in cleaning solution. Water Pump: Inspect for loose/broken parts prior to each use. A device that moves fluid through a combination of suction and displacement. 5. Engine: Branded engine provides years of reliable use. Air cooled engine that powers the pump. 6. Nozzles: Change nozzles for different spray patterns. 7.
Safety Hazard Signal Word Definitions 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. DANGER WARNING (orange) indicates a hazardous situation, which if not avoided, could result in death or serious injury.
Safety Labeling Safety Decal Locations WARNING ALWAYS make sure safety labels are in place and in good condition. If a safety label is missing or not legible, order new labels from NorthStar Product Support at 1-800-270-0810.
Safety Labeling Safety Decals To order replacement safety labels, call NorthStar Product Support at 1-800-270-0810.
Initial Set-Up Step 1. Inspect & Unpack Upon receiving your item check for missing or damaged parts. See “Component Identification” section of this manual for a diagram of the pressure washer and its components. • For missing or damaged components, contact Product Support at 1-800-270-0810. • If complete, fill out product serial number information. See “Limited Warranty” section of this manual.
Initial Set-Up Hardware Bag PART# 800110 FOR (MODEL #157121,157122,1571221,157123, 1571231,157132) OR PART# 800111 FOR (MODEL #157124,1571241, 157127,1571271,57133), PART# 800425 (MODEL #157130) PART# 802788 (MODEL #157160) NOZZLES QTY 4 PART# 38578 T-HANDLE KNOBS QTY 2 (ALL MODELS) PART# 35198 NOZZLE GROMMET QTY 5 (ALL MODELS) VENTED FILL CAP QTY 1 (ALL MODELS) PART# 87170 BOLT, 1/4-20X3/4" QTY 4 (ALL MODELS) 13 PART# 82233 BOLT, CARRIAGE GR5Z 5/16-18X2" QTY 2 (ALL MODELS)
Initial Set-up Step 2. Assembly • Push the pressure washer in front of you has you walk. • To turn, push down slightly on the handles and pivot the pressure washer on its wheels. Note: Remove contents from packaging to begin assembly. Handle & Billboard Assembly 1.) Attach handle to bumper tube using: a. (2) Carriage Bolts (82233) b. (2) T-Handle Knobs (38578) 2.) Attach billboard to handle using: a. (4) Screws (87170) 3.
Initial Set-Up 2. Make sure the engine is at least 7 feet from all combustible materials and structures during operation. 3. Keep a fire extinguisher rated "ABC" nearby. Keep it properly charged and be familiar with its use. 4. Place the pressure washer so that the exhaust fumes will not be directed towards people or building air intakes. Positioning: 1. The pressure washer should be positioned on a firm, level (less than 3-degree slope), heatresistant surface with good drainage and a nearby water supply.
Operation Follow Safety Rules for Operation set-up and operation. Do not allow anyone to operate the pressure washer who has not read the Owner's Manual and been instructed on its safe use. 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 children. Under the Influence.
Operation Avoid inhalation of exhaust. Running this pressure washer indoors can kill you in minutes. Exhaust contains carbon monoxide. This is a poison you cannot see or smell. Never pull by hose. Do not move this pressure washer by pulling on the hose. Hose or connections could fail and result in catastrophic high-pressure release of fluid as well as hose whipping. Avoid sharp objects. Keep hose away from sharp objects. Bursting hoses may cause injury. No load bearing.
Operation Add Fuel • WARNING • Fuel Fire/Explosion Hazard Gasoline is highly flammable and explosive. Heat, sparks, and flames can ignite fuel vapors, which can become widespread during fueling. A flash fire and/or explosion could result and cause serious injury or death. Always use extreme care when handling fuels.
Operation 2.) An insufficient water supply will damage your pump. Make sure the water supply is steady and is 20% over the rated flow of your pump. Use a stopwatch to time how long it takes to fill a 5-gallon bucket with your garden hose. The bucket must fill faster than the times listed in the table below. WARNING High Pressure Fluid Injection Hazard High-pressure fluid discharge from leaks (even pinsized) or ruptured components can pierce skin and inject fluid into the body.
Operation Coupler WARNING Depressurize First Any time you remove/install/change a nozzle, you must depressurize hose line by squeezing the spray gun trigger while the engine is off. Even if the engine has been off for a long period of time, the hose may remain dangerously pressurized. Collar High Pressure Output 1. Make sure the engine is off and the hose line is depressurized. 2. To install the nozzle, pull the collar back and twist the nozzle firmly into the coupler on the end of the wand. 3.
Operation the nozzle at low pressure. (Air in the hoses can cause damage to the pump, so always make sure all the air is out of the hoses before starting the pressure washer engine.) • Make sure the water supply hose is not kinked. A kinked hose will provide insufficient water supply to the pump and reduce its life. Make sure the hose remains unkinked after moving the pressure washer. WARNING Chemical Spraying • Never spray acids, corrosives, or abrasive or flammable liquids.
Operation Start-Up Procedures Start the Engine to Power the Pump Instructions for selecting a nozzle can be referenced in the “Connect Hoses, Water Supply, and Spray Nozzle” section. See the subsection “Select Nozzle for Spray Gun”. 7. Rinse with high-pressure spray as instructed below: 1. Make sure water supply is connected and primed. CAUTION Warranty Void Begin High Pressure Spray Running the pump dry will cause damage and void the warranty. WARNING 2.
Operation Procedure: 1. Put on one of the high-pressure spray nozzles (always relieve system pressure first and follow instructions for attaching a nozzle). 2. Clear the cleaning area of all persons. Keep children and pets away. 3. Hold the spray gun firmly with two hands and a sturdy stance -- Gun kicks back when triggered. 4. Wash from the bottom to the top, using side-toside motions. This washes away heavy dirt and allows the detergent to soak as you work toward the top. 5.
Storage When you are finished using the pressure washer, you must prepare the sprayer for storage and store it in a proper location. 1. Drain the water from the high-pressure hose and spray gun by depressing the trigger on the spray gun until all water drains out. 2. Disconnect the plumbing that connects to the pump outlet. 3. Obtain the materials you will need: • 12" piece of garden hose or equivalent, Funnel, and • approximately 6 oz. of RV antifreeze. 4.
Storage d. Shut off engine. 2. Lubricate cylinder and piston: a. Disconnect spark plug wire and remove spark plug. b. Add one teaspoon oil through spark plug hole. c. Place rag over spark plug hole and slowly pull the recoil a few times to lubricate the combustion chamber. Prepare Engine for Long Term Storage First prepare the engine for long term storage if you will not be using the pressure washer for more than 30 days. Fuel can become stale when stored over 30 days.
Maintenance & Repair WARNING Maintenance Hazards ALWAYS shut off water supply, bleed water pressure, turn off engine, and disconnect the spark plug wire before cleaning, adjusting, or servicing the pressure washer. After servicing, make sure all guards and cover shields are replaced before using.
Maintenance & Repair 1) Unscrew garden hose from water inlet (if connected). 2) Unscrew inlet filter. 3) Remove filter screen. 4) Run water through filter screen to clean. 5) Reassemble. 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.
Maintenance & Repair Perform Engine Maintenance NOTE TO COMMERCIAL USERS: All mechanical equipment, no matter how well designed, will need maintenance and repairs. A NorthStar pressure washer is no exception. At times, a NorthStar pressure washer may become inoperable because repairs are required.
Troubleshooting This section provides a list of the more frequently encountered pressure washer malfunctions, their causes, and corrective actions. Some corrective actions can be performed by the operator or maintenance personnel, and others may require assistance of a qualified Service Center.
Parts Explosion- Model #157121,157122,1571221,157123,1571231,157124,1571241, 157127,1571271,157130,157160 *157127 SHOWN 30
Parts List - Model #157121,157122,1571221,157123,1571231,157124,1571241, 157127,1571271,157130,157160 REF# PART# DESCRIPTION 1 2 3 4 5 6 7 8 9 35198 801578 802173 800401 799956 800402 305200 777914 777915 800531 800419 779165 803709 791308 800110 800111 800425 802788 803475 60694 803734 803751 6067 803752 44373 803753 6066 803754 A157121 A157123 A157124 A157127 A157130 A157160 221222 777165 2215 82232 82233 38578 87164 82630 82622 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 82021 82028 2
Parts Explosion - Model #157132, 157133 15 29 21 16 31 32 30 1 33 24 20 34 23 2 5 4 3 22 25 8 27 28 26 10 9 14 Fig06756 19 11 12 13 17 6 18 *157132 SHOWN 32 7
Parts List - Model #157132, 157133 REF# PART# 1 2 3 4 5 6 7 8 9 10 11 12 13 35198 801579 800401 802173 799954 800402 305200 777914 800419 777915 779165 791308 803709 800110 800111 221222 777165 2215 82232 799993 A157123 A157127 6067 6066 GROMMET,7/16 ID-14GA-16A HANDLE-TUBE WITH RIV NUT-AL DECAL, BILLBOARD BILLBOARD WITH DECAL 4 MM-AL-BASE-CWPW 10" FLAT FREE WHEEL WHEEL RETAINER HOSE QUICK COUPLER 50' PRESSURE HOSE – 3/8" HOSE QUICK COUPLE NIPPLE SPRAY GUN NOZZLE QUICK COUPLER LANCE NOZZLE, 4 PACK #3.
Pump Assemblies - COMET DWD, CAT4DNX, CAT4SPX 4DNX DWD 157121, 157122 157123, 157132 4SPX 157124 FIG06919 Ref# Part# 1 777915 3/8" QC x 3/8" FNPT 800985 3/8” INLET FILTER 800429 GARDEN HOSE ADAPTER 777340 ¼” X ¼” HOSE BARB FITTING 1 796161 1/8” NPT X 1/4” HOSE BARB FITTING 1 4 777834 ¼” HOSE CLAMP 2 5 777165 ¼” PVC HOSE (SOLD BY FOOT) 801964 EASY START VALVE 1 38584 EASY START VALVE 1 777347 3/8” STREET TEE 1 2 3 6 7 Description Qty 1 1 CO1215068300 8 35918 1.
Pump Assembly – Cat 66DX Fig06964 Ref# 1 2 3 4 Part# 777915 800986 777340 777834 5 777165 6 7 8 9 10 11 38584 777347 777836 777376 777410 777838 157127, 157133, 157160 Description 3/8" QC x 3/8" FNPT INLET FILTER, 1/2” NPT ¼” NPT X ¼” HOSE BARB FITTING ¼” HOSE CLAMP ¼” PVC BRAIDED HOSE (SOLD BY FOOT) EASY START VALVE 3/8" STREET TEE THERMAL VALVE VALVE, POP-OFF 3/8" STREET ELBOW 1/4" NPT PLUG 35 Qty 1 1 1 2 1.17 ft.
Pump Assembly – General Pump ME11511G8 157130 Ref# 1 2 3 4 5 6 7 8 9 10 11 12 13 Part# 2296 788419 777839 777119 2264 777915 800986 777840 777165 221222 777838 777836 777837 Description 3/8” STEEL HEX NIPPLE UNLOADER, VALVE, VRT3 1/2" NIPPLE X 3/8” MPT 3/4” HOSE CLAMP 1/2" BLACK HOSE (SOLD BY FOOT) 3/8" QC x 3/8" FNPT INLET FILTER, 1/2” NPT 1/2" BARB X 1/4" MPT ¼” PVC HOSE (SOLD BY FOOT) CHEMICAL STRAINER 1/4" NPT PLUG THERMAL VALVE 3/8" NPT PLUG 36 Qty 1 1 1 2 1.5ft.
Pump Exploded View – Comet DWD 37
Pump Parts List – Comet DWD Ref# 1 2 5 6 8 9 10 11 12 13 14 15 17 18 19 20 21 22 P/N Not Available CO3202001800 CO3609033800 CO3609027100 CO1215068300 CO3202001800 CO1210081500 CO2409030800 CO1802019700 CO3410031800 CO1210004000 CO1210004900 CO1802018000 CO3003002400 CO2803042400 CO1215066700 CO1817011100 CO3009024600 23 24 25 CO1210046500 CO3604006300 CO1802025700 26 CO1205009400 27 CO3009024500 28 29 30 CO1210041500 CO3604006300 CO1802025700 31 CO1205009200 32 33 34 35 36 37 38 CO1210082400 C
Pump Exploded View – Cat 4DNX Ref# 5 8 10 11 15 20 24 25 27 32 33 37 38 48 49 53 64 P/N CA549360 CA547153 CA14041 CA55337 CA14488 CA547048 Not Available CA49883 CA15710 CA547961 CA14179 CA92241 CA44428 CA44842 CA14179 Not Available CA46229 DESCRIPTION SCREW BEARING COVER O-RING, BEARING COVER OIL SEAL INNER BALL BEARING CONNECTING ROD OIL PLUG CAP CRANKSHAFT BALL BEARING CAP O-RING FOR OIL FILTER CAP GAUGE, BUBBLE OIL W/GASKET GASKET, FLAT FLEX OIL GAUGE DRAIN PLUG O-RING FOR DRAIN PLUG CRANKCASE CROSSHE
Pump Exploded View Continued – Cat 4DNX Ref# 402 403 408 410 412 414 P/N CA547798 CA45070 CA32094 CA549352 CA45694 CA20184 DESCRIPTION ADJUSTING CAP LOCK NUT PRESSURE SPRING SPRING RETAINER PISTON STEM BACK UP RING 415 423 CA14190 CA46249 O-RING, PISTON STEM RETAINER VALVE 424 CA13966 425 426 428 429 CA547799 CA46250 CA26133 CA17399 435 436 437 CA547800 CA49664 CA13963 O-RING, VALVE RETAINER (OUTER) PISTON RETAINER WASHER O-RING, VALVE RETAINER O-RING, PISTON RETAINER (INNER) VALVE SEAT O-RING,
Pump Exploded View – Cat 4SPX 41
Pump Parts List – Cat 4SPX Ref# 5 8 10 11 15 20 24 25 26 27 32 P/N Not Available CA547084 CA14041 CA125351 Not Available CA547020 Not Available Not Available Not Available CA15710 CA547961 QTY 3 1 1 1 1 3 1 1 1 1 1 Ref# 188 249 401 402 403 404 408 410 412 414 415 P/N Not Available CA31643 CA547797 CA547798 CA548671 CA548675 CA32094 CA549352 CA45694 CA20184 CA14190 1 423 CA46249 RETAINER VALVE 1 CA92241 CA44428 CA44842 DESCRIPTION SCREW BEARING COVER O-RING, BEARING COVER OIL SEAL INNER BALL BEARI
Pump Exploded View – Cat 66DX35 Ref# 5 8 10 11 13 15 20 25 27 32 33 37 P/N Not Available Not Available CA14028 CA125351 CA14037 CA146421 CA48843 CA48977 CA14480 CA46798 CA14179 CA92241 38 40 48 49 50 51 53 64 65 70 75 CA44428 Not Available CA25625 CA23170 CA48862 CA14048 CA48830 CA46404 CA48845 CA48911 CA48754 DESCRIPTION SCREW BEARING COVER O-RING, BEARING COVER OIL SEAL O-RING, BEARING COVER INNER BALL BEARING CONNECTING ROD CRANKSHAFT BALL BEARING CAP O-RING FOR OIL FILTER CAP GAUGE, BUBBLE OIL W/GA
Pump Exploded View Continued – Cat 66DX35 Ref# 401 P/N CA49100 DESCRIPTION HANDLE, ADJUSTING (BLACK) CAP, ADJUSTING NUT, LOCKING (M25X1) SCREW, SET (M4X4) SPRING, PRESSURE RETAINER.
Pump Exploded View – General Pump ME11511G8 45
Pump Parts List – General Pump ME11511G8 Ref# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 P/N Not Available GP36202551 GP94737600 GP36200176 GP90384100 GP36200366 GP36711501 GP701002 GP98222500 GP99169000 GP96690500 GP81210015 GP90367400 GP36211366 GP36211276 GP94733300 GP36211151 GP36719301 GP98213750 GP701016 GP58040109 GP90385800 GP81210870 GP90384300 GP99378950 GP94749000 GP81211256 GP81211451 GP90351800 GP90552500 GP90360400 GP90516900 GP90508930 GP8
Pump Exploded View – Cat 66DX50 Ref# 5 8 10 11 13 15 20 25 27 32 33 37 38 40 48 49 50 51 53 64 65 70 75 89 90 P/N Not Available Not Available CA14028 CA125351 CA14037 CA146421 CA48843 CA134953 CA14480 CA46798 CA14179 CA92241 CA44428 Not Available CA25625 CA23170 CA48862 CA14048 CA48830 CA46404 CA48845 CA48911 CA48754 CA134955 CA134351 DESCRIPTION Screw Bearing Cover O-Ring, Bearing Cover Oil Seal O-Ring, Bearing Cover Inner Ball Bearing Connecting Rod Crankshaft, 10.
Pump Exploded View – Cat 66DX50 Ref# 401 402 403 404 408 410 412 414 415 P/N CA49100 Not Available CA125521 CA88953 CA45198 CA49101 CA49103 CA129638 CA49104 DESCRIPTION Handle, Adjusting (Black) Cap, Adjusting Nut, Locking (M25x1) Screw, Set (M4x4) Spring, Pressure Retainer.
Limited Warranty Dear Valued Customer: The NorthStar Product you just purchased is built with the finest material and craftsmanship. Use this product properly and enjoy the benefits from its high performance. By purchasing a NorthStar product, you show a desire for quality and durability. Like all mechanical equipment this pressure washer requires a due amount of care. Treat this pressure washer like the high-quality piece of machinery it is. Neglect and improper handling may impair its performance.
Limited Warranty Continued The engine warranty is covered under the terms and conditions as outlined by the engine manufactures warranty contained herein and is the sole responsibility of the engine manufacture. Normal engine maintenance such as spark plugs, air filters, adjustments, fuel system cleaning and obstruction due to build up is not covered by this NorthStar warranty. Please fill in the following information and have it on hand when you call in on a warranty claim.
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WARNING: This product can expose you to chemicals including gasoline engine exhaust, which is known to the State of California to cause cancer, and carbon monoxide, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. Assembled by Northern Tool & Equipment Company, Inc. Burnsville, MN 55306 NorthernTool.
