CAT Pump Valves

[trinityspeedwash]

I had a CAT pump with relatively low pressure. Since I am new to this, I figured I would start with replacing the valves. Replaced all 3 inlet valves and 3 outlet valves.

All that seems to have fixed the problem. Pump is creating good pressure.

However, is there anything that can be salved from the old valves? For example, a couple of valves have broken O-rings on the bottom. Can't help but wondering if I can replace that O-ring and they might work again?

I only ask because a set of 3 valves runs $90 from Kleen-Rite.

Any advice on valve replacement is appreciated.

 

[pcb]

I keep o-rings, teflon backup rings and the white basket. I just usually change the oring and backup ring when the oring goes out. If the valve is sealing I don't see any need in replacing it. If the sealing part of the valve hangs up on the basket then I change it also.

 

[trinityspeedwash]

Thanks.

Any idea what part number is to get the only the o-rings and teflon backups?

 

[pcb]

Cat valve oring 43358
Cat back up ring 48361

 

[Greg Pack]

Save the old valves and install new orings.

Your broken o-ring may be a sign of head washout. If the new valves break their orings you need to replace the head. 5CP pumps get one free head replacement.

 

[Keno]

We have a set of rebuilt valves ready to go, if we have issues with a pump, we replace all 6, and rebuild those takeouts for the next time they are needed.

 

[Randy]

I must be doing something right because I almost never have a valve problem. I've never had a pump head washout.

 

[Cwajciec]

I had a bay cat310 start pulsating this weekend and also low pressure. (<800psi) I took the valve plugs out and one of the holes was leaking a little water. (I’m gravity feed to the pump) Pulled that valve and a small piece of plastic was stuck in the valve. Removed it and back in business! For free!

 

[trinityspeedwash]

Thanks Greg.

Where can I get the "one free head" replacement? Is that directly from CAT?

 

[Greg Pack]

5CP 2120W pumps come with a one free head replacement. You can call cat and send them in directly. However you will have to send in your bare head after you strip all the parts off it. They return a new bare head with an R stamped on it, the R indicating it is a replacement head and will not be eligible for further warranty.

I would only do this if the orings on your new valves break, if you see obvious signs of head erosion, or if a replacement seal kit goes bad quickly. and there is no reasoble explanation other than possible washout. As Randy said he's had no trouble with washout, and in my case I didn't see washout symptoms in some heavily used pumps until they were 20 years old.