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I need to purge the air out of the pump on my pressure washer

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Usually this is not a problem. Simply taking the spray nozzle out of the gun, turning on the feed from the garden hose and squeezing the trigger with the engine NOT running will purge air in the pump. You might have a problem with your feed to the pump. Check any filter/ strainer or look for kinks in the hose. Restrictions in the feed line will appear as "air" in the pump. low feed will cause lots of damage to your pump. Look up "cavitation" and pressure washer on google.

Posted on Apr 27, 2014

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Troy built pressure washer won't build pressure


If the pump shaft is properly connected to the engine then you will probably need to rebuild the pump. Be sure air is purged from it before trying to use it.

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1 Answer

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you will have to try the following start up purge up onece with just water then start the powerwasher if that does'nt give u pressure ther is gaskets inside the pumping sometimes 4 to 8 of them these might be to wore down to hold pressure if u can locate the pump and desemable it run it to ur local dealer tell u need new gaskets put into it

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Power Washer has no pressure, any ideas


1. If you have an inlet chemical injection valve make sure that the hose is intact and that the valve is closed.
2. Purge all air from the line by holding the nozzle actuation lever open until all air has been purged. When you connect the water supply hose turn it on before connecting the high pressure hose and let the unit self purge to the pump outlet high pressure hose fitting. Then connect the high pressure hose.
3. You could have a stuck spring and ball inside the high pressure head of the pump. You can tip the unit on its' side and add a substantial amount of WD-40 to the water supply hose fitting in an attempt to free the springs and balls.
4. Try BRIEFLY running the unit without the hose connected to see if there is high pressure water ejected from the high pressure fitting.
5. Inlet water screen at hose connection is clogged (hose screen and rubber) Check screen for debris.
6. The water strainer is clogged. (Almost looks like an LPG regulator just after but in line of the supply hose connection to the pump)

Order of troubleshooting

1, 2, 5, 6, 4, then 3.

Thanks for using FixYa!

Kelly

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1 Answer

2-yr old troy-bilt pressure washer with honda gcv160 engine. seems to run well, but when trigger is pulled get full pressure for less than 5 seconds before reducing to house water pressure. when left...


It sounds like an air lock. Try this: With the machine off, connect the hose to the washer and let it run for several minutes to get all of the air out of the hose, and to purge any air out of the pump. Shut off the water, and connect the high pressure hose, but not the gun. Let the water run for several minutes. stretch out the HP hose and make sure that the air is displaced. Shut off the water, connect the gun, and purge as before. Now crank it washer up. As quickly as safe to do so, open the trigger to keep water moving through the washer. It should come up on pressure very quickly. It is better during normal operation to keep water moving through the system. When I am through for a while, I shut down my washer, but leave the trigger depressed to allow the pump to stay full of water, and cool. This prevents further problems when I restart it.
Hope this was useful.

Regards --W/D--

Jul 17, 2009 | Briggs & Stratton Garden

1 Answer

Karcher Power Washer that surges up and down with water pressure.


Before you start it up:
1. Disconnect the high pressure hose 2. Connect the water supply and turn on 3. Make sure water is flowing through the pump
Start the motor, run for about 10 seconds and then turn off.
Turn off the water supply, connect the high pressure hose, turn water back on, start the motor and away you go.

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1 Answer

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Is there a check valve on the hose inlet that is stuck, and won't let the water in???????

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1 Answer

No pressure from pressure washer


Do you plan on doing the repair yourself. I need more info, when you supply water to the pressure washer, pull the trigger to purge air from pump, and start the machine. Do you see water coming out from the bottom of the pump? Do you hear the pump working or is it quiet. If you hear a cycling pattern or hear the pump trying to push the water out but it isn't, then you may have a blockage inside the trigger or the spray tip. If the pump isnt building pressure then you may have a pump problem. A stuck check valve, cracked plunger, bad seal, or could be air bound.

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1 Answer

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The systems are simple but if they aunt stored correctly(allowed to freeze) or the air isn't purged out of it. It can result in damage to the machine.If water is dripping out of the pump it is damaged. if not then it could be air (purge system), or a damaged or stuck check valve.

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