How to install a log splitter pump

[@montyparks734]

I have a 1991 MTD 20 Ton log splitter with a DUERR 717-0887a hydraulic pump. The pump leaks oil where the pipe goes in the bottom return line side of pump. and it's NOT leaking where the hose connects to this pipe, some times the pipe just falls out the pump. Do you know what is suppose to hold the pipe in? How many GPM is this pump and if I need to get a new pump, what pump would be compatible? The splitter works very well but hydraulic fluid is getting expensive---Any help appreciated