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Patz 98B Unloader Manual

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Want to know what the black Knob, I think called unloader valve is used


Hubert, The unloader valve is like a by pass for the water and regulates/controls water pressure and redirects water when gun trigger is released. Check the attached links,instruction and guides to learn more about Pumps/unloader, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
Pressure Washer Unloader Valve
How to replace an unloader valve on your pressure washer pump
All About Unloader Valves ePowerWash
How to Replace an Unloader Valve on Pressure Washer Repair Guide Help...

May 17, 2016 | Garden

1 Answer

Honda powwer boss 3000-whenyoupull the handale to spray it kills the engine


Sounds like the unloader (regulator). Try removing the nozzle, the pull the trigger with the engine running. If motor is still running then it could be the Unloader malfunctioning. If you require a new one try a bypass system for the unloader. The bypass will help save the life of the unloader.

Jun 26, 2014 | Honda Pressure Washer PSI 3000

1 Answer

What size are spacers for 1998 Harley sportster?


Hi Anonymous, the long one goes on the pulley side, for more information about your question please visit the website below. Good luck and have nice day.
http://www.stcharlesharleydavidson.com/OEMpartfinder.htm#/HarleyDavidson%C2%AE/XL1200_CAP_SPORTSTER_1200_(1998)/REAR_WHEEL_-_CAST/99451-98B%5cCAP/99451-98B%5cT27%5cCAP

Apr 26, 2013 | Harley Davidson Motorcycles

1 Answer

Pressure off and on every few seconds with my karcher 3000BH


hi there rjcomer2

here is web site for parts
http://www.ereplacementparts.com/karcher-2500-11944010-pressure-washer-parts-c-33388_33389_33973.html

sounds like you have a unloader valve problem or a crack in the pressure manifold housing between pressure outlet and unloader valve assy allowing unloader to cycle on/ off

or some dirt trapped in the unloader valve seat , make sure you have good supply of water - ie good flow from tap to pump

try cleaning unloader 1st and fitting in line tap filter

hope it helps

pauly46

May 20, 2011 | Karcher 2500 PSI Pressure Washer

1 Answer

Honda Excell 2600 no pressure and water is leaking from the pump. i believe it's the unloader but can i fix it myself. i'm handy with tools and repairs but do no have the manual.


a manual will not tell you how to replace the unloader if you have the same unloader you will need a pressure gauge to adjust it at 2600 psi and your spike pressure should not exceed 3100psi and the leak at pump you need to check your oil make sure is not milky and if not you will need seals also

Aug 23, 2010 | Garden

1 Answer

Not sprayer engine stop


This is an indication that the unloader not working properly. When you release the trigger the unloader senses the increase in pressure and bypasses the water into the water inlet. When the unloader is not working and you release the trigger, the water pressure builds quickly and overcomes the power of the engine shutting it down. Here is the manual for your machine, http://www.pressurewashersdirect.com/manuals/Simpson_WaterBlaster%20manual_2.pdf

and some information about troubleshooting from the manual.
"Not Unloading. Leak in Gunvalve or Hose. Repair gun leak . Replace leaking or broken hoses. Debris or wear in Check Valve. Remove Check Valve parts and clean. Check O-Ring. Reface with emery cloth, or replace checkvalve. Damaged Piston U-Cup. Rebuild Unloader Valve (Service Center)."
Usually when the unloader fails the pressure regulator will most likely need to be replaced as the unloader is usually incorporated within. For now try lowering the pressure some and just tie the trigger open untill you can service. Good luck.

Jul 14, 2010 | Simpson WS4050V Water Shotgun 4000 Psi...

1 Answer

We have a Karcher G2500VH pressure washer. If you start the engine with the trigger pulled on the spray wand it will run at full pressure until you release the trigger. after that, when you pull the...


Hi, Karcher calls the unloader valve a spill valve,
this is a link to a full drawing/parts listing , and your fault description might well be a sticking /seized unloader(spill ) valve hope this helps
http://www.pressureparts.com/ManualViewPage.aspx?Manual=/mmDEV/PDF/karcherparts/g2500vh.pdf

the part number is on page 9 of the drawing
spill valve 45910400
hope this helps , we usually use some good quality silicone grease to lube the valve ,

Mar 07, 2010 | Karcher 2500 PSI Pressure Washer

1 Answer

Air leaks via the head so tank does not maintain pressure


The air leak you have described is probably from the unloader valve which may not be seating after it dumps cylinder pressure. If you can find a good manual for it, disassemble the unloader valve and check for contaminates or build up around the seat. The differential spring may have lost it's value also, in which case you will need to replace the unloader assembly.

Jan 20, 2010 | Porter Cable C2002 Wk 150 Psi 6 Gal. Oil...

1 Answer

I have a pressure washer with a faip 3 piston pump. the other day i was using it and it stopped unloading. i cleaned the unloader and it didn't help. I bought a new one and it still won't work. I e-mailed...


I think your main problem is that the unloader valve needs to be lubricated. Use the very best water resistant bearing grease you can find. If you can e-mail me a pic of your unloader assembly I can try to explain how to set it up. firehead@roges.com

Sep 14, 2009 | Honda Garden

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