Please share some info if ya'll know about this.

Working on a Clark GPX25E GPX230E-0107-9233. Trans fluid is ending up in the Hyd fluid tank and causing it to over flow. My thoughts are the Hyd pump, trans fluid is by passing the shaft seal of the Hyd pump and into the Hyd fluid.

So I replaced the Suction hose from the tank to the pump to remove any obstructions. Also replaced fluids and filters.

Still happening.

My thoughts now are that the transmission pump is over pressurizing the Hyd pump mounting area somehow. Blockage in a port?

Has this happened to anyone. Please help if you have any info.