Question about Troy-Bilt 020528 Gas Pressure Washer

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Pressure issues My pressure washer builds pressure and has a powerful first burst and then no pressure

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  • James Geniti May 12, 2013

    I forgot to add that I replaced every valve and offloader with parts from the new pump unit I bought. I purchased the full pump assembly but dropped and broke the housing before I ever got it on. So I transferred all the internals from he new one. I wound up with the same result.


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Sounds like the pump is damaged; most likely from freezing. Needs anti-freeze if stored in cold temps.

Repair or replacement of pump may be close to replacement cost.

Posted on Oct 30, 2013

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Why is pressure not building up to cut off?

The pressure switch that shuts off the motor when you release the trigger may need to be replaced if you're sure that there is sufficient operating pressure.

May 21, 2015 | Electric Garden


WARNING: Do not allow PW to run "dry"

It is recommended that once pressure washer is in operation and water flow thru wand is there ,that you do not allow off period between burst of no more that 2 minutes or you highly risk damage to your pump,not engine, due to overheating. See if Dump valve is adjustable,cheaper models not adjustable. This valve senses pressure/heat build up in pump when trigger is released, and is a secondery backup to release such heat/pressure to avoid pump failure. If you have repeatly left trigger off for more than 2 minutes in for prolonged periods of time,this is not good.

Thanks and Please Rate a Fix Ya
John jj505

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1 Answer

Will not build up pressure sounds like it is but as soon as you hit the trigger pressure goes away

Is this something new happening?

These machines quickly (a matter of seconds) build up to pressure and shut off. A slow leak is not much of a player. Eventually the pressure will bleed off and the pump come on (for a few seconds).

Pressure restored, should be good to go. Have you cleaned the inline filter to the hose. If there is a short burst of water then a dribble with a new hose, the filter is a first check

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Turbo heads are pressure rated for different pressure washers, your turbo head is most likely rated bellow the maximum pressure of your washer which in turn causes a pressure build up in the hose and it's eventual failure.

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1 Answer

Install replacement high pressure hose

If you are replacing the hose because it burst you might contact the manufacturer. Mine, of a different brand, burst and they sent me a new pressure washer saying that it was very difficult to install a new hose. They had a lot of problems with hoses from China.

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1 Answer

Weak Pressure. I have the power washer running for a few minutes, then I go to pull the trigger on the wand and I only get about 1-2 seconds of full force pressure. The machine is still running (not as...

Check for a clog.

take the hose off the washer pump and start it. if you have good water pressure then you may have something on the hose or the wand. I had a lizard in mine that caused that problem before.

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1 Answer

Hoda power washer low on pressure

Caused by either of two things: The pump is worn and needs to be rebuilt or replaced. OR the pressure relief valve ( protects the motor from excessive pressure build up when you turn spray off) , is stuck in the open position thereby not allowing pump to build up pressure .

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1 Answer

Hitachi EC12 Compressor- weird hum

The burst of air you hear as the compressor shuts off is the cylinder unloading so it will not have to restart against a high pressure load. If the unloader is electrical it would explain the hum that you hear. This could be a normal function.

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