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Cleaning an unloader valve on a pressure washer. How do I do it? Can I lube it with plumbers grease? Gary

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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

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redbeard00
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SOURCE: How do you clean the unloader valve on a power washer pump?

The unloader valve usually is replaced. I dont know if you can get o-rings for it. But if you want to take it apart, there will be a crown or cap style nut just below the spring. Unscrew it completely and you will be able to remove the spool. There is just a series of o-rings on it.

Posted on May 12, 2009

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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

  • 3 Answers

SOURCE: need help getting to an cleaning stuck unloader

The cart body makes this process a little confining but it can be carried out without removing the pump from the motor.

Diagram courtesy of: pressureparts.gif


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  1. Refer to assembly 9 in the diagram. Remove the splash cup by working the push-on nut off the top of the cup.
  2. Remove two Torx fasteners (13) and twist the nylon valve retainer gently while pulling up to remove it. Be aware of the small parts under the retainer.
  3. The objective is to get the valve (12) out of the bore (A). Connect the hose and wand to the pump, make sure the wand valve is closed. Connect the water supply to the pump and turn on the water flow.
  4. Place a shop towel over the valve bore and with the throttle in the off position, pull the start cord briskly several times to see if enough pressure builds to pop the valve out of the bore. If not, set the throttle to low and start the engine. Unless the valve bore is really corroded, this should pop the valve out.
  5. If this process fails, you may have to unmount the pump and employ a more brutal approach that will likely require a new valve.
I have worked on my washer for the last 2-3 years to keep it going but I've opted to replace the pump this year. My replacement is an "AR RMV2G25D" (~$170) .

Posted on Jun 04, 2009

  • 2 Answers

SOURCE: Karcher K 2400 HH Pressure Washer no pressure

http://www.landanorthwest.com/documents/instructional/spill_valve_instructions.pdf

Posted on Jun 05, 2009

  • 40 Answers

SOURCE: where is the unloader valve on my pressure washer

is not necessarily a cap, but could be a screw in plug, that should be close to the hose hook-up on the pump Inside there there should be a round ball and a spring that you can tighten or loosen to adjust the unloader and if it has been used ALOT, where the ball seats there could be grooves cut in there and you might need to get a valve kit to fix it

Posted on Sep 05, 2009

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1 Answer

Runs good but presser drops soon after engage wand. gas unit.unloader valve apossible? 16 years oil .


Disassemble the water admittance valve and clean bore with a dowel and crocus cloth. Then replace O rings on the valve plunger. Lube lightly with plumber's grease and re-assemble.

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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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My Honda XR2750 pressure washer doesn't seem to be spraying a full capacity. Is there a blockage and /or filter I can clean?


Usual cause is the water admitance valve that regulates the pressure by admitting more or less water.

Remove the valve parts and clean the bore with crocus cloth on a dowel rod. Replace the O rings and lube with plumber's grease.

Re-assemble.

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1 Answer

Pressure washer lost pressure in the middle of a job


The pressure valve has stuck in the high pressure position. This prevents anymore inflow and hence no further water will be pumped.

Rebuild the valve... There are O Rings to replace and clean the bore with croocus cloth. Lube the O rings with plumber's grease... good as new! 15 minute job. Get EXACT sized O rings for the unit.

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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 ,

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1 Answer

Clean and unloader valve on Karcher hd3500 pressure washer -intermittent pressure on and off. Cleaned inlet screen. Think unloader valve is is under pressure knob? Will cleaning help?


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

Sep 08, 2009 | Karcher Garden

1 Answer

The unloader valve seems to be hanging up!


The o-rings on the unloader may be worn out. Also you have to lube it with extremely good waterproof grease

Sep 06, 2009 | Karcher G3025OH Pressure Washer

2 Answers

I have a sticking unloader valve in my Karcher 3050. where is it and how do I fix it?


Hello:
Here is a schematic. On page 2.1, part #1 is the unloader valve. You need to remove it and lube it with a very good waterproof grease. Also insure the O-rings are in good shape and the spring action is working.

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1 Answer

I have a Karcher HD3500 and was told Imay have a stuck unloader valve. Where is it and is there a diagram showing how to get to and clean?


Hi
The unloader valveis HERE
If you go to D-2 it is part numbers 8 to 13. If it is stuck it is not only important to free it up but also make sure no o-rings are damaged and lube it with a very good waterproof grease. Good luck.

Jun 30, 2009 | Honda Karcher G2400HH-R Pressure Washer

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