Is this a stupid question?

S

Sal at ESG

New member
Hate to show my ignorance by asking something this basic, but I haven’t seen anything regarding this on the web or in any of my books.
Do you run your machines at full throttle? Can pressure @ the tip be adjusted by decreasing/increasing the throttle position, or should pressure only be adjusted by changing the tip or adjusting the distance of the tip from the surface being cleaned?

runnin' wide open,
Sal
 
ron p

run your unit at full rpms
adj. your pressure with diffrent size tips or a duel lance. Some people use a high pressure ball valve but if not done correctly it can be hard on your unloader.
distance,tip size,or duel lance is what i would do.
 
Sal no such thing as a dumb question, how else other then using the SEARCH on the board and asking us are you going to learn before you get burned?

We all have been through what you're going through now. Well most have, there is always one who knew it all before doing it.


Jon
 
I agree with Ron. I have never dialed my machine down, we always do it with the tips or dual wand.
 
I'm going to dis'agree with ya Mike for agreeing with Ron.

Don't see nothing wrong with idl'ing down a cold water rig,nothing but cutting ya psi and volume down.....am I messing something where.
 
The best way to lower the PSI is by using a larger tip for the wand. The next best way is to dial down on the unloader if it is adjustable. The only problem with that is that you decrease the water volume which means decrease in cleaning strength when using chemicals.

As for running your machine at less then full throttle that is never advised because I think it can hurt your pump because the pump works best when machine is at full throttle.

Breakdown of the above:
1-(Best)Changing tip=changing psi but same gpm
2-Adjusting down unloader=lowering psi and decreasing gpm
3-Throttling down engine=lowering psi and ruining pump in the long run
 
My understanding has been that on hot water machines, you don't want to cut back the throttle because that will reduce the charging capacity for the battery, which in turn messes with the burner. On cold water machines, I would see nothing wrong with idling down a little, since you don't have burner issues to deal with. Actually this would be a good question for Mark from Easy Clean, or the Wiz. This post would have been best suited in Equipment category.
 
Oops, Sorry Bigboy, you are mistaken. The one thing that you forget is that these engines are air cooled, and the cooling is optimized at Full RPM's. So the slower teh engine runs, the less air flows over the engine to cool it, and so it runs hotter.

If you do not believe me, take a plastic bag and cover up the fan area on the front of the engine, where the pull starter normally is. If you are not willing to do it because it will burn up your motor, then you will see what reducing the air flow by reducing RPMS will do to you.

Scott
 
oops me forget about the airflow thingy but wait a minute I had a motor'bike that was aircooled too and I didn't run it wide open all time,will sometimes I did but it would seem hotter when I did,seemed to run a little cooler idled down a little be't lol.
 
Aah, but the cooling system was not optimized for the bike at 150, it was optimized for 55. Also the cooling system is a different design on a bike VS. an industrial motor.

Scott
 
waterpressure

Everyone is right . The best way to reduce pressure is to have a dual lance unless you are doing tile and grout where pressure needs to be lower with the same gpm going throught the tips. Then that is where you will need to adjust your unloader to get the desired Psi for the surface you will be cleaning. You do know where or what you unloader is right?
 
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