CAT 310 - Pump parts identification

[trinityspeedwash]

Another post from me ... looking for some help with part identification. Pics are attached. I have some parts that are leaking and looking to replace them.

Here is what I believe so far:

1) - ?
2) - ?
3) - high pressure rinse out to bay
4) - water inlet
5) - weep line?
6) - weep line shutoff?
7) - ?

Also, if I was to rebuild one of these pumps by replacing the o-rings, valves, etc. do anyone have a recommendation on how to remove all the gear (the in and outlets)? Given that you need room to maneuver, I would expect that you have to remove each part, one at a time?

Thanks, as always.

 

[pcb]

1 is high pressure regulator
2 is solenoid to bypass for low pressure presoak (I'm guessing this is Coleman) There is a regulator after the solenoid to adjust low pressure
3 is high pressure and presoak to bay
4 is water inlet
5 is weep
6 is weep shut off and flow control (I prefer a needle valve to adjust flow)
7 is bypass hose

You shouldn't need to remove anything to rebuild the pump. Only if you're swapping the head or pump. Valves come out of the six ports with big caps. Bolts come out and head can be pulled out and you usually have enough room to get to everything.

 

[trinityspeedwash]

Appreciate the reply. What is the point of #7 (the bypass hose)?

 

[pcb]

To get the desired pressure the regulator bypasses water back to the pump inlet.

 

[Randy]

First of all that is not a Cat 310 pump it’s a 5CP2120 pump.

#1 is the regulator, it puts back pressure on the pump to regulate the pressure. To raise or lower the pressure screw the brass nut down to the raise the pressure and back it off the lower the pressure.

To remove the head to rebuild it you’ll need to remove the hoses from the head and the 8 bolts holding the head on and slide the head off the pump. You don’t need to remove all the components. When the time comes that you have to rebuild the head be sure to inspect the seal and valve seating areas for “head washout” if the head is washed out you need to replace it or have it sleeved.

 

[Roz]

If you ever want to replace pump valves (easy to do) there is a good you tube video from Tom Allen of KleenRite fame.
You should only use a socket wrench to open the valve nut so you do not strip the corners. Also helpful to own a breaker bar (sold at HD in various lengths). Great for mechanical advantage as the nuts can be hard to remove otherwise