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post #1 of 9 Old 08-21-2017, 05:10 PM Thread Starter
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Karcher G2600 VH pulsing

My father in law brought me his Honda powered Karcher pressure washer last week.

According to him, his girlfriend was using it and the high pressure hose burst. He replaced the hose and now it either has no high pressure at all, or occasionally the high pressure pulses for a few seconds followed by no high pressure.

I removed the unloader valve, cleaned and greased it, and reinstalled it. No change.

I replaced the unloader valve. No change

With the high pressure hose disconnected from the unit, the water comes out with a ton of force.

If I remove the tip from the wand, and quickly click the trigger I can get high pressure, but if I merely pull the trigger, I just get regular water pressure.

Soooo, I'm wondering if he used the wrong size hose maybe (new hose is 3/8. No idea what old hose was). Any other suggestions?
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post #2 of 9 Old 08-21-2017, 05:40 PM
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Re: Karcher G2600 VH pulsing

For one thing which you may know--be sure to let the water run through with the pressure hose disconnected to assure a good water supply with no trapped air "pockets".

1947 John Deere "M"
1966 Ford 4000, gas, 8-spd
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post #3 of 9 Old 08-22-2017, 09:42 AM Thread Starter
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Re: Karcher G2600 VH pulsing

Thank you for the response. Yes I did bleed the system before cranking the motor up. Hooked the water hose up and held the trigger down for a bit to bleed the air out of the system.
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post #4 of 9 Old 08-23-2017, 05:12 PM Thread Starter
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Re: Karcher G2600 VH pulsing

So can anyone tell me the significance of having full pressure with the high pressure hose disconnected, but no high pressure or surging when the water goes through the high pressure hose and wand?
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post #5 of 9 Old 08-24-2017, 08:18 AM
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Re: Karcher G2600 VH pulsing

Quote:
Originally Posted by jeepwm75 View Post
So can anyone tell me the significance of having full pressure with the high pressure hose disconnected, but no high pressure or surging when the water goes through the high pressure hose and wand?
Of course, one can only guess your problem and it perhaps will take several troubleshooting steps, but once you are absolutely certain it is thoroughly bled of any trapped air--step #2 with your symptoms would be to back flush the wand/gun.

I have used a tiny stiff wire to carefully "ramrod" an unrecognized obstruction from the nozzle end. (I could even see a bit of sunlight shining through before back flushing efforts). I also used air compressor nozzle to back flush, and also garden hose intensified pressure to backflush. I was successful. I should mention I had the wand/gun disconnected from its hose. Be certain the hose "clean".

1947 John Deere "M"
1966 Ford 4000, gas, 8-spd
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post #6 of 9 Old 08-28-2017, 10:50 AM Thread Starter
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Re: Karcher G2600 VH pulsing

Well I've tried several different tips on the wand, with no change, and with no tip on the wand if I cycle the trigger quickly I can get spurts of high pressure.

I'll still try it just to make sure I don't have something hung up in the trigger valve area. I'm wondering if he put the right size high pressure hose on it. Looks like the original hose was 1/4, and he put 3/8 on here.
Would that potentially be the issue?
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post #7 of 9 Old 08-30-2017, 05:08 PM Thread Starter
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Re: Karcher G2600 VH pulsing

Bump. Can anyone tell me if having the wrong sized hose would cause this issue? I've already purchased a new unloader valve, new pressure release valve (overheated pump) and don't want to keep throwing parts at this thing if possible.
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post #8 of 9 Old 10-30-2017, 12:09 PM Thread Starter
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Re: Karcher G2600 VH pulsing

Well I've determined that the hose is the correct size. The only thing I can see that is left to do is take the pump down and see if I can find something awry in there. Anyone have any suggestions before I do so?
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post #9 of 9 Old 12-08-2017, 10:40 AM Thread Starter
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Re: Karcher G2600 VH pulsing

Just to wrap this one up, I disassembled the pump. Everything looked ok, put it back together with fresh oil, cleaned and greased the unloader again, no change.

Bought a replacement pump off of ebay for $70, bolted it on, and works great now. Obviously a pump problem, but not one I could figure out.
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