Regulator/Unloader Problem

[Shane T]

I have a Cat 3CP that uses a regulator/unloader. It bypassed back to the mix tank. Problem is when I pull the trigger on the wand it bogs the engine down and the belt for the pump starts to slip and smoke. The regulator/unloader is fairly new. Any suggestions?

 

[Jim Martin]

did you remove the check valve......

 

[Shane T]

did you remove the check valve......

View attachment 82073

Yes I have removed it. Even as the engine bogs down I still have good flow & pressure at the wand.

 

[Jim Martin]

what was the reason you changed the unloader...what was it doing....??

did this problem happen as soon as the new one was installed....

stupid question...but it happens...are you sure you turned it the correct way....??

 

[Shane T]

what was the reason you changed the unloader...what was it doing....??

did this problem happen as soon as the new one was installed....

stupid question...but it happens...are you sure you turned it the correct way....??

I replaced it in the first place because I was losing pressure, turns out the problem then was seals in the pumps.

It has gotten worse recently. Yesterday start with this issue but went away and I finished the day okay.

I need to confirm this but it doesn't seem to matter what pressure it is set at.

 

[Jim Martin]

seeing how it was determined that it was a cat pump problem and not the regulator....and you did not have this issue of the pump bogging down until you replaced the regulator....If it was me ( and if you still have it )...I would put the old one back on and see if the problem still happens...that way you can start eliminating each one to narrow down what is going on....


if you have good pressure and everything is fine until you pull the trigger....and the whole pump bogs down...that would lead me back to the regulator....a crossed water line....or a blockage somewhere......those are the place I would go to first........

 

[Shane T]

Thanks Jim. I was thinking of going back to the other regulator back on so will start there. I have been wondering if it could be a restriction somehow in the bypass line. I'll check that while the regulator is off.