General Pump Clutch

Tom, I looked at the PDF and under advantges it says nothing about saving fuel. So $500 for extended pump life? Why bother. Especially since it's just something else to break.


I have other plans for it...
 
More like 200$ is what I found them for. I'm using mine so I don't have to bypass the line back.

Thats the bigger one that is $500. I still can't get a clear answer on how many horsepower it's good for. I can see how it could be wired to disengage when you stop spraying, but I'm curious how it re-engages when the trigger is pulled.
 
There is an extra pressure switch. The switch is open, no clutch. The switch is closed, clutch.
 
There is an extra pressure switch. The switch is open, no clutch. The switch is closed, clutch.

What's getting me is when the pump stops spinning, nothings happening, so when you pull the trigger - what? Must be a diagram somewhere.
 
What's getting me is when the pump stops spinning, nothings happening, so when you pull the trigger - what? Must be a diagram somewhere.

Did you ever find an answer to this? I just picked up a nearly new ts2021 with a single groove clutch installed on it, and was wondering the same thing. Do they make special unloaders for this? Also, do they take standard v-belts? I assume I can just throw on a manual 12v switch and basically have a normal pump setup if nothing else.
 
To Clutch drive a pump, or not to.. there is the question.

a single A-belt is only good for the transfer of about 8hp /.0007 / 5.6 gpm= 2040psi..
Expecting the belt to not slip at 3000psi is "wishful thinking" ..
IF you use the clutch to engage at an idle, and never expect it to engage from stopped to 3500rpm in a split second,
you might get lucky enough to not burn it up before the slipping A-belt can fry the windings
..with shear friction rubbing the belt against the housing.
Using a clutch to eliminate the long-term-bypass function of an unloader is a "predictable failure"..
..Unless You incorporate an automatic idle-down feature, before the clutch re-engages.
Stop here, call a technical guy, and save both time and money.
So..
If you thought you were going to use clutches for a dual-pump dual-wand system,
Go back to the clutch supplier, and ask him what he will guarantee using a dual B-belt version..
He will probably say "sheared shaft-keys".
Therefore..
After spending the DIY time and money to attempt all this..
you will wish you had listened to a technical guy, and all you can really use the clutches for is
to disengage a pump which has a problem.
Spend your $500 on spare pump and cogged belts.

I wonder how many DIY's have tried & failed the clutch idea,
..and they're too proud to admit it in a forum.
.. .. Did you notice NObody posted a "success story" in the 6 months of this thread ?
Respect a Tech.
 
the technical answer to the question in laymans terms. great response jerry

Actually it was a technical warning in layman's terms, but not an answer to the question. Still don't know how the clutch "knows" to re-engage. If the clutch is dis-engaged when the trigger is closed, then when the trigger is pulled seems like nothing would happen since no water is flowing or pressurizing to activate a flow or pressure switch. Only thing I can think of is to use a flow switch on a pressure fed pump. So the flow from the inlet pressure activates the flow switch which activates the clutch and pump. That wouldn't solve this for gravity fed pumps.
 
You can use a trapped pressure unloader with a switch built in to the bottom of it to turn the clutch on and off.
 
You can use a trapped pressure unloader with a switch built in to the bottom of it to turn the clutch on and off.

Thanks Russ. Are you describing a special unloader, or saying I can add a flow switch to the bottom of any trapped pressure unloader? If the latter, then which port is the bottom (my unloaders have two inlets, two bypass ports, one outlet, and one gauge port).
 
LOLOL
..If you want help, just call..
incorporating the pressure switch with a control relay, and throttle-valve is best.
Do it right the first time.. at least you will save some fuel.
 
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