PTO Pump

[3238dpw]

I have 425 just like moss has. Engine in the middle. I need to do more investigating, but I think my PTO Pump may be losing pressure. When my hydraulic oil is cold my PTO works fine but once the oil heats up the solenoid valve doesn't open all the way and I don't get full speed out of my attachments. I've been told by a local guy that that is often a sign of the pump wearing out. So my question is, if my pump is the problem, does anyone have a source and part number for that pump. I think I am going to avoid a rebuild as I use the machine in my landscaping business and don't want much downtime. With the right pump in hand it could be swapped out in a couple of hours.

 

[J_J]

It may not be the pump.

The pump provides flow and the hyd component develops the presure.

The motor could be worn, the valve worn, etc.

You need to do a flow and pressure test which will cause the pump to put out the max it can.

The test set is essentially a flow meter , a pressure gauge, a needle valve and a relief valve.

You start the engine and slowly close off the needle valve and watch the flow in GPM and the pressure gauge.

I believe most manufacturer will replace if the pump if it can not do 75% of it's rated capacity.

 

[3238dpw]

Thanks for the info JJ. I know it may not be the pump. Like I said I need to do more research but thanks to JJ I know what to look for