M157597ag owner's manual instructions for set-up, operation, maintenance & storage t railer mounted , 2-g un h ot w ater p ressure w asher – 4000 psi / 7 gpm portable outdoor-use only this pressure washer produces both cold and hot water high pressure spray. Cleaning chemicals may be incorporated in...
Hazard signal word definitions 2 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 no...
Table of contents 3 about your pressure washer .................................................................................................................. 4 specifications ............................................................................................................................
About your pressure washer 4 thank you for purchasing a northstar hot water pressure washer! Your machine is designed for long life, dependability, and the top performance you demand. This pressure washer is designed to: 1) produce a high-pressure spray of heated or unheated water (up to 7 gallons p...
Specifications 5 model model # 157597 flow output pressure rating 4000 psi flow rate 7 gpm maximum temperature 200 f dimensions / components length 201.5" width 78" height 75" weight 2000 lbs. – dry 6550 lbs. – water tank full pump type northstar tws 7040 engine horsepower 23.5 hp high pressure disc...
Component identification 6 ref # description ref # description 1 indicator light (power) 11 flow switch 2 indicator light (flow) 12 unloader 4 indicator light (thermostat) 13 water outlet 5 thermostat 14 engine (see engine manual) 6 heat switch 15 engine key switch 7 control panel 16 pump 8 gasoline...
Component identification 7 reference guide 1. Indicator light (power) instrument used to monitor unit operation. Should illuminate when the power switch is in the on position. 2. Indicator light (flow) instrument used to monitor unit operation. Illuminates if water is flowing through the spray gun. ...
Special equipment safety features 8 on-product warning labels ref# part # description 1 786632 rotating equipment warning 2 786739 operating instructions/warning 3 786635 burn hazard decal 4 782325 danger and warning decal 5 782397 battery warning decal 6 779695 moving big units 7 786633 tow warning...
Special equipment safety features 9 high pressure safety device (rupture disc) warning-if the high-pressure safety device ever discharges water, turn the engine off and do not use the machine. The device will no longer function properly. See a dealer or call product support at 1-800-270- 0810. This ...
Assembly and initial set-up 10 steps for assembly / initial set-up step 1. Unpacking & delivery inspection step 2. Gun and nozzle storage set-up step 3. Initial pump & engine preparation step 4. Battery installation each of these steps is discussed below: step 1. Unpacking & delivery inspection find...
Assembly and initial set-up 11 figure 3 – hardware bag contents qty (2) engine keys qty (2) #3.5 nozzle 5 packs part # 38532 #7.0 nozzle 5 pack part # 779544 qty (16) grommets part # 777111 qty (2) pin catches part # 778498.
Assembly and initial set-up 12 step 2. Gun and nozzle storage set-up 1. Guns. Store guns vertically on back of trailer using supplied pins. Rest guns with handle down on the back of the trailer and pins will hold guns in place. 2. Nozzles. Insert grommets and nozzles (provided) into the hose reel gu...
Assembly and initial set-up 13 prepare high psi hose on hose reel completely unwrap / unwind the high pressure hose from the hose reel. Note: new hose will “grow” when charged for the first time and should always be charged one time before being wrapped on the reel. Step 4. Battery installation inst...
Moving and towing 14 warning the filled pressure washer is heavy. It can crush and cause serious injury if it rolls out of control or tips over. Always keep the jack cranked down to help balance the trailer when it is not connected to a vehicle hitch. Follow all the instructions below for safely con...
Moving and towing 15 with fingers. Proper adjustment is obtained when coupler is as tight as possible on ball and locking lever can still be opened and closed. 4. Lock lever closed to secure the attachment. 5. Insert safety pin. Attach safety cables two safety cables must be used while towing . Cros...
Moving and towing 16 plug in lights/brake plug 7-way electrical pin connector into vehicle . Raise the jack always crank the jack into the up position before towing. Tow tow the pressure washer to your desired work location. When towing, always adhere to the following safety rules. Read vehicle inst...
Before each use 17 follow the steps below prior to each use of the pressure washer. Steps to follow before each use step 1. Check equipment step 2. Add fuel(s) step 3. Select suitable worksite step 1. Check equipment check/add pump oil check/add pump oil . Caution: never run the pump without suffici...
Before each use 18 1) check hoses, fittings, wand, trigger gun and connections for signs of wear, cracks, looseness, or leaks. Replace as required. 2) check and clean the nozzle orifice. 3) clean inlet filter. (see maintenance instructions) inspect fuel system always inspect (engine and burner) fuel...
Before each use 19 always follow these general safety rules when fueling: 1) turn pressure washer off and allow to cool for at least two minutes before removing any fuel cap. Note: a running or still-hot engine or burner is hot enough to ignite fuel. 2) fill fuel tank outdoors – never indoors. Fuel ...
Before each use 20 water) empty space below fill neck to allow for fuel expansion. 3) replace fuel cap securely before starting engine. 4) wipe any excess fuel from unit before starting step 3. Select suitable outdoor worksite before using the pressure washer, you must understand the criteria for se...
Before each use 21 or other vehicles, on boats, or on pick-up truck beds. Warning : never attempt to attach ductwork to the engine muffler or burner exhaust to allow for installation inside an enclosure. This could cause hot air deflection, heat build-up, and increased exhaust back-pressure, resulti...
Operation 22 after you have checked and fueled the equipment and positioned it in a suitable worksite, it is time to start your pressure washer. The following are the procedures necessary for safe, successful operation of your pressure washer. Warning carefully read and follow all instructions and s...
Operation 23 attach high pressure hose attach high pressure hose(s) to the pressure washer's water outlet. Warning : 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 tem...
Operation 24 with a single gun. B) use two #3.5 nozzles when operating dual guns. Warning : never use #7.0 nozzles when operating both guns. If two operators use #7.0 nozzles and one operator releases the trigger on their gun, the flow through the second operator's gun will suddenly increase from 3....
Operation 25 coupler on the end of the wand. (figure 9a) figure 9a 3. Release the collar, making sure it springs back and re-seats to its original (non-retracted) position. (figure 9b). Check the connection by pulling on the nozzle to ensure a tight connection -- if correctly inserted, nozzle will r...
Operation 26 low pressure adhere better to the surface being cleaned, allowing the formula time to react and remove dirt more effectively. Note: an external chemical injector pump is not recommended for use with this pressure washer. Warning : chemical spraying never spray acids, corrosives, or abra...
Operation 27 safety rules for operation before starting the pressure washer, review the following general safety rules for operation: conditions for use know how to stop. Be thoroughly familiar with proper use of the equipment and all controls and connections. Know how to stop the pressure washer an...
Operation 28 lock trigger safety latch when not spraying . Spray gun is equipped with a built- in trigger safety latch to guard against accidental trigger release. Rotate safety latch to the locked position when not spraying. Leaving unattended . Always turn off the pressure washer and relieve syste...
Operation 29 trigger by rotating it to the locked position. 3. Follow the instructions in the engine manual for starting the engine. - if the engine doesn't start on the first try, pressure may build up in the pump. Relieve pressure by squeezing the spray gun trigger before attempting to start engin...
Operation 30 steam is desired) other potentially combustible materials. Operate only where open flame or torch is permitted. 2. Make sure there is fuel in the burner fuel tank. Caution: do not run the machine in hot mode without fuel in the burner's fuel tank, or damage can occur. 3. Make sure the e...
Operation 31 secure the spray gun open by blocking or tying the spray gun in the open position. 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...
Operation 32 6. The nozzle should be 12" to 24" from the work, closer for tough areas. 7. Small parts should be washed in a basket so the pressure does not push them away. Larger, lightweight parts should be clamped down. 8. The pressure washer is set and locked to the maximum rated pressure when it...
Operation 33 step 4. Stopping stop the engine using the following steps: warning: never disconnect the high-pressure hose from the pump or spray gun while the system is pressurized. Relieve pressure by squeezing the spray gun trigger after the engine is turned off. 1. If the heater was used, turn he...
Storage 34 storage when you are finished using the pressure washer, you must prepare the sprayer for storage and store it in a proper location. Note: o if you will be storing the sprayer in freezing conditions , follow the instructions for preparing the sprayer for storage in freezing conditions. O ...
Storage 35 3. Using a wrench, disconnect the plumbing that connects to the heating coil inlet. The water will flow out of the heating coil. This will protect the coil from freeze damage. 4. Open both water inlet ball valves and remove the cap from the water filter. This will drain the pump and water...
Storage 36 prepare pressure washer for storage prepare the pressure washer for storage. 1. Disconnect the battery, remove it from the battery compartment, and store it indoors. 2. Make sure the engine start switch is off and fuel valve is off. 3. Disconnect the engine spark plug wire if you haven't ...
Burner adjustment 37 oil burner adjustment (only needed if white exhaust smoke appears) the oil burner is preset and performance tested at the factory (elevation 1100 feet). Different altitudes may require a one-time initial burner adjustment. Caution: if white smoke appears from the burner exhaust ...
Burner adjustment 38 a. Locate the shutter as shown in figure 13 below. The shutter is a thin circular metal plate located on the outside of the air band. The shutter adjusts independently from the air band and is used to fine-tune the amount of intake air. B. Observe that the aluminum pointer attac...
Maintenance & repair 39 inspect and maintain your pressure washer as specified below in order to keep it in safe and optimal working order. Follow all safety rules and recommended maintenance instructions. Warning always shut off water supply, bleed water pressure, turn off engine and disconnect the...
Maintenance & repair 40 servicing the pressure washer. Major repair. Major service, including the installation or replacement of parts, should be performed only by a qualified electrical service technician. Obtain factory approved parts from northern tool product support at 1- 800-270-0810. Replacem...
Maintenance & repair 41 1) check hoses, fittings, wand, trigger gun and connections for signs of wear, cracks, looseness, or leaks. Replace as required. 2) check and clean the nozzle orifice. Clean inlet filter clean the inlet filter before each use. Warning : when cleaning filters, check whether da...
Maintenance & repair 42 recharge and maintain battery inspect, recharge, and maintain battery according to your battery manufacturer's instructions. Do not store with battery charger always connected. Batteries that are over-charged can boil themselves dry and produce excessive amounts of hydrogen, ...
Maintenance & repair 43 maintain burner's fuel filter/water separator drain water from burner's filter bowl as needed, and replace filter after every 500 hours of use or as needed. 1) after each use of the burner, visually check the filter bowl. If any water has accumulated, drain it via the water d...
Maintenance & repair 44 cleaning flow switch inspect and clean the flow switch as needed mineral build-up and/or debris within the flow switch can occur and may affect burner operation if not periodically cleaned. Mineral build-up and/or debris can stop the movement of the shuttle inside the flow sw...
Maintenance & repair 45 3) unthread the removable outlet fitting with the swivel still attached from the flow switch assembly 4) remove the shuttle 5) clean the inside of the brass flow switch body and the shuttle with water and a soft brush 6) insert the shuttle into the brass flow switch in the or...
Maintenance & repair 46 figure 21 2) clean off carbon deposits, which may have accumulated on the tips of the electrodes. 3) reset the spacing as shown below in figure 22. Drive belt maintenance check drive belt tension after first 24 hours of running and then routinely with each oil change. Tighten...
Maintenance & repair 47 warning: belt slippage can cause static electricity build-up, which may result in sparking. Fire ignition can result. Instructions: 1) make sure engine is off and spark plug wire is removed. 2) remove belt guard. See "parts breakdown" section of this manual for location. 3) l...
Maintenance & repair 48 instructions: 1) inspect magnets, shoes, and magnetic coil for wear. Replace as needed. Note: magnets should always be replaced in pairs (both sides of an axle). A) replace magnets and shoes if worn or scored. B) replace magnets if wearing unevenly or abnormally. C) replace m...
Troubleshooting 49 engine will not start causes solutions low oil shutdown fill engine with the adequate amount of oil. Cold engine choke engine to start. No fuel add gas to engine; make sure fuel shutoff valve is open. Dead battery recharge/replace battery. Spark plug wire not attached attach spark...
Parts explosion – m157597 rev ag (skid) 50
Parts explosion – m157597 rev ag (skid) 51 ref part # description qty ref part # description qty 1 5027 1/2" npt elbow 2 50 779607 1/2" npt x 1/4" hb 90 ° 1 2 17141 3/4" hose clamp 2 51 779614 qc injector, 4gpm 1 3 777375 unloader 1 52 779627 pump guide 1 4 777837 hex head plug, 3/8” 1 53 779628 pum...
Parts explosion – m157597 rev ag (trailer) 52.
Parts explosion – m157597 rev ag (trailer) 53 ref part # description qty 1 779612 skid 1 2 779580 tank strap 2 3 779500 525 gallon tank 1 4 777779 3/8", 150" 6000 psi hose 2 5 791279 28" lance 2 6 779165 gun with lance 2 7 784105 3/8" 4000 psi hose 23" 2 8 778498 pin catch 2 9 777111 grommet 16 10 3...
Pump explosion 54.
Pump explosion 55.
Wiring diagram 56.
Summary of important safety information 57 this section provides a summary of the various safety procedures and measures that have been presented throughout the manual. Keep this summary handy and refer to it to refresh your memory about how to safely use your pressure washer. Warning carefully read...
Summary of important safety information 58 o when connecting the battery, connect the red cable to the positive terminal first. O when disconnecting the battery, disconnect the black cable from the negative terminal first acid/skin contact. If battery acid contacts skin or clothing, flush immediatel...
Summary of important safety information 59 hitch trailer properly. Follow all instructions for hitching trailer to towing vehicle. Make sure hitched trailer sits level connect lights and breakaway switch. Jack. Keep jack cranked down to help balance the trailer when it is not connected to a vehicle ...
Summary of important safety information 60 check sprayer nozzle . Sprayer nozzle can become a projectile and cause serious personal injury or property damage if not properly connected to the spray gun. Check to ensure the nozzle has been properly attached to the spray gun before using the pressure w...
Summary of important safety information 61 pressure safety device ever discharges water, turn the engine off and do not use the machine. The device will no longer function properly. See a dealer or call product support at 1-800-270-0810. Never pull by hose . Do not move this machine by pulling on th...
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Limited warranty 63 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 al...
64 manufactured by northern tool + equipment co., inc. Burnsville, mn 55306 northerntool.Com.
