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    M157304G 

 

Installation, Operation, and Maintenance Manual

 

 

Cold Water Pressure Washer

Cleans dirty surfaces with high-pressure water. 

 

To the Owner: 

Thank you for purchasing a NorthStar 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 will prolong your machine’s life and prepare you for its safe 
operation.  Enjoy the exceptional performance of your NorthStar 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 

Pump Oil 

Pump is shipped with oil.  Change oil plug 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.  Maximum inlet water temp. 

140

°

F (60

°

C)

 

Storage 

Do not allow water to freeze in the pump, hose, or spray gun. 

Spraying 
Chemicals 

Use any North Star brand or equivalent pressure washer chemicals.   
Adjust soap adjustment knob to regulate cleaning power. 

Maintenance 
Schedule 

Pump: 

Oil: change after first 50 hours, then every 3 months or 500 hours. 

Read and understand all manuals before operating.

 

 
 
 
 
 

Any Questions, Comments, Problems or Parts Orders 

Call NorthStar Product Support 1-800-270-0810 

 

 
 
 
 
 
 

   

ITEM NUMBER:    157304

 

  

 

SERIAL NUMBER:

 

 

 

HP:______  Volts:______  Amp:______  Ph:_____ 

 

RPM:____ PSI:____ GPM:____ Nozzle Size:_____ 

 

Pump:___________  Hose:______  Lance:_______ 

 

Max. Discharge Temperature:_____________

 

Summary of Contents for 157304

Page 1: ...on units previously sold Quick Facts Pump Oil Pump is shipped with oil Change oil plug and check pump oil level before starting Use SAE 30 Non detergent pump oil item 4043 or Cat Pump oil item 22158...

Page 2: ...t 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 thi...

Page 3: ...3 Machine Component Identification 157304 Ref Description Ref Description 1 Inlet Filter 4 Pump 2 On Off Switch 5 Unloader 3 High Pressure Outlet 6 Motor...

Page 4: ...4 Installation Instructions I Unpack Separate and identify all components Use the assembly instructions in this manual for assembly...

Page 5: ...5 Hardware Bag Separate and identify all components Use the assembly instructions in this manual for assembly...

Page 6: ...njector as shown for 157304 4 Connect the other end of the pressure hose to the spray gun as shown 5 Connect the lance extension to the spray gun and insert the proper nozzle into the lance end 6 Make...

Page 7: ...code for connection requirements Step 1 Using a 3 8 wrench remove the roof and the top of the electrical housing Front panel not shown for clarity Step 2 Feed power cord through the strain relief nut...

Page 8: ...gallon bucket in 83 seconds or faster C 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 D Never use a...

Page 9: ...e proper application can speed up cleaning jobs tremendously WARNING Only use North Star pressure washer chemicals or chemicals specifically formulated for pressure washers Follow the chemical manufac...

Page 10: ...is trained in the operation of the pressure washer and is capable of making minor repairs and performing all preventative maintenance procedures as outlined in the provided manuals 2 Keep a stock of...

Page 11: ...freezing during storage Storage Before you store the pressure washer make sure you do the following 1 Unplug the power cord from the pressure washer 2 Disconnect high pressure and garden hose Winter...

Page 12: ...nozzle Clean or replace nozzle Pressure Washer Runs But Surges Or Cycles While In Bypass Causes Solutions Leak between unloader and gun Check all connections between unloader and gun for leaks Tighten...

Page 13: ...Parts Breakdown S h u t 1 T u r n 2 T u r n 3 R e l i e v e p r e s s u r e s p r a y 4 5 P r o t e c t fr o m S t a r t 1 C o n n e c t 2 C o n n e c t 3 C o n n e c t 4 T u r n 5 S p r a y w a t e r...

Page 14: ...cal 1 52 35169 Inlet filter 1 19 2212 Chemical strainer 1 53 305267 Strain relief nut 1 20 777165 Chemical hose 48 54 777645 F npt x hose barb 1 21 31934 Chemical injector 1 55 17141 Hose clamp 1 22 7...

Page 15: ...Inlet 1 2 1 33 14179 O Ring Oil Filler Cap 1 163 17547 O Ring Seat 6 37 43987 Gauge Oil Bubble 1 164 46658 Seat 6 38 44428 gasket Flat Oil Gauge 1 166 46429 Valve 6 40 92519 Screw Sems HHC M6x16 4 16...

Page 16: ...16 Wiring Diagram...

Page 17: ...h as engines are guaranteed by their manufacturer and can be serviced at factory authorized locations near you Any costs incurred due to replacement or repair of items outside of a NorthStar approved...

Page 18: ...18 Manufactured by Northern Tool Equipment Co 2800 SouthCross Drive West P O Box 1499 Burnsville MN 55337 0499 TM...

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