Most forum members will advise to not run up the hours on an expensive diesel machine running a splitter whose performance will be marginal because of low hydraulic flow compared to stand alone gas engine units with two stage pumps.
Your tractor at full rpm's pumps 4.75 gpm.
A typical pump for a gas engine wood splitter pumps 13 gpm's until it starts working hard and then 3 gpm.
This translates into fast cycles particularly when retracting the cylinder.
Dave