Senin, 31 Maret 2014

pump on pressure washer seizes up?




Cheryl


I run the water through the pressure washer.
I fire up the pressure washer.
I pull the trigger and the pressure washer dies.
I cannot pull the cord again until I release the water pressure in the pump, and no water flows through the hose after the engine dies.
I drained the fuel and restarted. I tried to pull the trigger and gave it a little bump--on and off. The motor stayed running, but the water quit flowing. Is there some sort of a valve in the pump that I need to do something to?



Answer
How long has it been since you ran the thing? If you have bad gas or a clogged fuel line, the unit will start and even run after a fashion. But the moment you load the engine (engage the pump), it will die. Before you look to anything else, drain out the old gas, clear the fuel line, check the carburetor and make sure everything is clean - then add fresh *stabilized* gas and try again.This is such a common problem with small engines - mowers and washers in the spring, and snow and leaf blowers in the fall and winter that have not been stored properly that I expect many dozens of such questions over the next few weeks.

If this doesn't work, then look into the pump itself - but as it is building pressure, I am inclined to think that the engine is running lean or fouled and so cannot take the load.

Simply putting in fresh fuel may not be enough if the carburetor is fouled or the fuel-line partially blocked. You could run some carburetor cleaner through the system and there are fuel-additives that perform the same function - but the former requires some small-engine skills, the latter a lot of time - you may have to run several tanks through the system to clean the jets properly.

But, also read the directions that came with it for pump maintenance and sequence-of-operations. It may be as simple as an adjustment of the pressure switch.

What is best water pump for inflow of water for a Gas pressure washer?




Sergio M


I need to feed water into the pressure washer using a still water tank in a van. There are two types of water pumps: Continuous flow and On-Demand.

If i am squeezing the trigger on the pressure washer, I can see the continuous flow pump working best but what if I am NOT squeezing the trigger? What happens? Will it damage the water pump?

An On-Demand pump hiccups between trigger squeezes and I am running the pressure washer "dry" which could damage it. See my question?
The use of the pump would be to rinse a car. (allow time for us to suds and sponge) then rinse.

One alternative I see is to just continually power off the 12V pump and Gas pressure washer Engine to prevent damage. and I see a continuous flow working best.

To comment on your water relief inlet. I don't deem it necessary as we will just be using a few gallons before shut down.

Any new thoughts?



Answer
Your problem doesn't have a simple answer.
You would be wise to contact the pressure washer manufacturer's tech support for pump recommendations. Be prepared to give them the model of your unit, the size of your tank, and the length of time you need to use it continuously.
A constant displacement pump would require a relief valve which returns surplus to the tank for continuous operation. A centrifugal pump would not require relief for continuous operation, but would have to be sized accurately for the task.
A demand pump might not meet the washer manufacturer's requirements.
The manufacturer probably has economical solutions.




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