Cat Pump Problem

[acsipresident]

Hi folks,

I have a 3.5gpm Cat Pump on my pressure washer. Usually, to ease startup, I hold the trigger on the wand open to allow water to flow easily so there is little back pressure on the engine. This weekend, I did the same, however whenever I released the trigger the engine would shut down. After several attempts it became obvious that the pump was never disengaging as it would normally do when you stop the flow of water through the wand. The entire unit would begin to shake and the engine would strain. Can someone tell me what I would need to do or look at so that the pump would disengage when the wand trigger is released. Boy, I'm hoping the pump is shot.

Thanks a bunch

 

[Larry L.]

It sounds like the unloader is giving you your problem

 

[Mark]

I agree with Larry, sounds like the unloader valve,
we have replacement unloaders, and pumps available. [hello]

 

[acsipresident]

Thanks Larry and Mark. I don't know much about the pumps but after some reading I believe you are pointing me in the right direction. Mark, what does an unloader go for? The Cat Pump I have is model 2SFX30GZI.

Again, thanks a bunch for the very swift response,

Paul

 

[Mark]

MV520 UNLOADER 8GPM 2000PSI <i>In Stock #4289 </i>

Product Information


Pressure actuated unloader.



Technical Notes
SPECIFICATIONS:

Maximum Pressure: 2000 PSI
Maximum flow: 8 GPM
Temperature: 250 F
Inlet: 3/8" MPT
Outlet: 3/8" MPT
Bypass: 3/8" FPT
Weight: 14 oz

$39.30

 

[Hotwaterwizard]

That is a great price. I would buy it.
A picture of your old one would help to match it up to the same Unloader.