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G 2650 oh,lithium greased unloader valve,new gun,new swivel connector, good pressure through pump with no outlet hose connected, good pressure through power hose with no gun attached,house pressur

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 174 Answers

SOURCE: poor pressure

i had this same problem on my pressure washer.the pump had some broken parts in it .i found my replacement pump on EBay.

Posted on May 31, 2009

  • 174 Answers

SOURCE: clean and unloader valve on Karcher hd3500

Hi:
Cleaning it is not enough. You need to make sure the o-rings are in good shape and grease it with a very very good waterproof grease. Here is a schematic of the pump. The unloader is parts 7 to 13 on D-2

Posted on Sep 10, 2009

  • 174 Answers

SOURCE: Troy Bilt pressure washer model 020209 will not

A leaking gun will kill all the pressure. You may need to repair or replace the gun

Posted on Sep 17, 2009

  • 1 Answer

SOURCE: Unloader Valve - Karcher Pressure Washer

where is the unloader valve locaed on a Briggs Stratton pressure washer?

Posted on Oct 03, 2009

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SOURCE: After removing the unloader valve and cleaning i

If you have pulsating usually you have at least one of the six check valves stuck open, so you're only running on two cylinders. You might have got some of your plumbers " grease" in the check valve. (Do you mean pipe dope?) three of the check valves shold be accessable from the outside of your pump but the other three are inside. You can get parts for your unit from www.pressure-washer-parts.com


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Posted on Jul 20, 2010

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2 Answers

I have a craftsman pressure washer model 580.752191 no pressure building. checked unloader valve and greased the internal parts, and it does flex (had to do it with channel locks) no pressure


do you get pressure without the hose attached ???
yes ???
bad wand
no ???
stop wasting your time as the pump is most likely bad. Ebay a new one
oh, greasing internal parts can cause them to hang up. 3and1 oil is a better choice, and pump saver should be used when pump is being stored

Apr 14, 2015 | Craftsman Garden

3 Answers

KARCHER 2400 PSI HONDA ENG GC SERIES 160 RESIDENTIAL PREMIUM


Hello there.

If the washer is loosing pressure then it needs to be looked at under warranty, im not sure where the fault would be, but another expert may well know.

If you don't get any suggestions then i would take it back and ask for a replacement or repair.

Hope this helps.

May 09, 2008 | Karcher 2500 PSI Pressure Washer

1 Answer

My Honda pressure is stuck in low pressure mode. How can I get it into hogh pressure mode?


You should check your pressure washer without the hose on it to make sure the gun isn't clogged. If the unit still sprays at low pressure with the gun and hose removed then most likely your unloader valve is stuck open. You can lookup a parts breakdown for the pump on your unit and locate the unloader so you can remove it and clean and lightly coat it with silicone grease. Then a dozen quick load/unload cycles should help properly seat the unloader parts.

Oh...and if the unit does make full pressure with the gun and hose removed you should take the hose off the gun and see if there are any obstructions in it. Hard water, corrosion, stones....something needs to be cleared!

Take all safety precautions while handling your washer! Good luck!

Nov 17, 2011 | Honda Garden

1 Answer

MODEL 580768080 S# 5665189 POOR PRESSURE FROM WAND, WATER COMES OUT FINE BUT NO PRESSURE


Check the unloader valve. This valve is designed to open when you release the trigger so the pressure doesn't damage the pump. If it gets stuck the water will continue to by-pass around the pump and will not allow the water pressure to increase. This valve is usually located next to the hose connection pipe on the pump where you connect the hose for the gun. Remove and clean and lightly coat the valve with lithium grease. Let me know how you make out.

Jul 26, 2011 | Garden

1 Answer

Engine runs but only a steam of water comes out of gun with trigger on. washer is stored in a heated garage in winter.


you need to remove and clean the unloader valve. The way this valve works is when you release the trigger the pressure is diverted around the pump through the inlet side so you don't cause damage to the pump. This valve is usually located next to the discharge pipe on the pump where your pressure hose hooks up to. Remove and clean. Be sure to clean port that you remove the valve from also. Use carburetor cleaner. Lubricate the valve with a light coat of lithium grease. This should cure the problem. If not let me know.

Jul 25, 2011 | Briggs Stratton 020273 Elite Series...

1 Answer

It runs good, but it doesn't produce any water pressure. I have taken apart the lower "pump" assembly and nothing seemed to be broken. Please let me know if you have any suggestions.


On the pump there is a valve called a unloader valve, this valve is designed to open and bypass the water when you release the trigger so you don't damage the pump. Sounds like the valve is either stuck or defective. Remove this valve and clean the valve and the port that it sits in. This should clear up the problem. The valve is usually located next to the hose port for the gun. If you can't find it go to jackssmallengine repair.com and look up a parts breakdown. You should use a light coating of lithium grease on valve and port. Also, check the nozzle and hose for ubstructions and make sure the strainer in inlet for supply hose is not clogged and you have proper water flow with no leaks. Hope this helps.

Jul 25, 2011 | Briggs & Stratton 020272 Elite Series...

1 Answer

Engine runs, but stopped pushing water


First I would start with the simple solutions.1. Check to see if your water pressure is good. 2. Check the pressure hose and tip for ubstructions. 3. Check the inet strainer and make sure you have no leaks. 4. Check the unloader valve which is located usually in the area of the pipe for your pressure hose connection. Remove and clean valve and port the valve sits in and lube with white lithium grease light coating. Try machine, if this doesn't work remove pump and inspect all the check valves and pump body for build up of gunk. If you find this you can clean with carburetor cleaner or you may have to purchase a rebuild kit. If you have problems finding the unloader valve go to jackssmallenginerepair.com and do a parts look up and you will see where this valve is. You can also purchase the rebuild kit on this site. Hope this helps.

Jul 24, 2011 | Karcher 2500 PSI Pressure Washer

1 Answer

I have a Karcher G2500HT. When I pull the trigger the pump will not engage. I pulled the pump off, checked the seals, and cleaned the screen. When I put it back on there was no leakage but the pump...


I would have to agree with your service department. The unloader valve works like this, When you press the trigger it closes and allows the water to build pressure through the pump. When you let off the trigger the valve opens and by-passes the water through the pump so you don't damge the pump. If this valve is sticking and remaining open the pressure will not build. You can remove this valve and clean relubricate with white lithium grease just a coating and this should clear up your problem. Check the port that the valve sits in and if you see gunk just clean with carburetor cleaner and blow it out with air compressor. A new unloader valve can cost between $40.00 - $60.00. Try to clean first before you buy a new one. The valve is usually located near the outlet that you connect your pressure hose to. If you can't find it go to jackssmallenginerepair.com and do a parts look up for your machine and you will see where this valve is located. Hope this helps.

Jul 20, 2011 | Karcher 2500 PSI Pressure Washer

1 Answer

Im not getting any pressure (other than hose pressure from this unit. The pump is new but not sure if the hose fittings on the outlet of the pump are working properly. There is a brass fitting with a...


Your problem is going to be with the brass fitting with the spring that you have discribed. This fitting is called an unloader valve, this valve is designed to by-pass the pressure that the pump has built up so you don't damage the pump when you release the trigger. There should be a nut on the end of this valve try turning it in some if this doesn't work try turning it out. It is usually set at the factory but sometimes they either don't get set or they are bad. You also could try to remove and clean. re-install with a light coat of white lithium grease. Hope this helps, let me know how you make out.

Jul 06, 2011 | Northstar Pressure Washer 3000 PSI

1 Answer

Once the trigger is released it won't starting spraying again.


I have the same problem. This is the responce for Karcher......

The unloader valve may be sticking, or is dirty. It probably needs to be cleaned and may need to be replaced, it is inexpensive. It gets a lot of use, but extends the life of the pump. The function of the unloader is to allow the machine to run in a bypass mode while the trigger of the gun is closed. First, a lack of high pressure can be caused by: 1. Insufficient water feeding to the unit, so check that the water is turned on all the way and that there are no kinks in the hose. 2. The inlet filter may be clogged. (it will need to be removed and thoroughly cleaned). 3. An internal water leak. 4.Also, low pressure can be caused by worn spray tips. If you have checked the first three with no resolution, the problem is internal and could be as simple as a sticking unloader valve. If you are mechanically inclined, you can clean this valve yourself and greasing the o-rings (use lithium based grease), or take it to a local service center. You do not need to take the pump apar
t. The unloader valve is located under the cover, and is secured with 2 bolts. (Use needle nose pliers to remove the valve) For those units with pressure and volume controls, the unloader is located under the pressure and volume control knobs themselves. Do not take any other bolts off or you will open the pump and lose the pump's oil.

Note: Lithium based grease will prevent future failure of the unloader valve.

Also, check websites such as fixya.com for tips and how-to info particularly on cleaning the unloader valve. Be sure to use lithium grease if you reassemble it.
I am going to check the manuel to see where it's at

Sep 24, 2009 | Karcher 2500 PSI Pressure Washer

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