I'm tickled to have found a neat forum dedicated to these cubs!
I hope there is an easy fix for this problem, I've become frustrated and need this machine to be running.
The machine is a 1782, was running fine until the seals in the pump and axles began to leak bad enough I decided it was time to tear it down.
I changed every seal in the pump, every component was carefully laid out and assembled in reverse order, the block and piston assemblies stayed together. I've done one of these Cub pumps in the past (seal wise) and didn't have any problems, but this thing is making me pull hair.
The filter is new, full of cub original petroleum hydrostatic fluid (2 gallons), and there is nothing functioning at all. I ran the thing probably 15 minutes by now - hope no bearings are damaged - cycled the speed and everything countless times. I even flipped the charge pump just for the heck of it. I pulled the relief valves to see if one was stuck open, but they appear fine and functional. It is worth noting that while the relief valves were out I spun the input shaft with a drill to see what would happen, it is definitely pumping fluid because it will quickly push fluid through the relief valve holes. Why there is no prerssure, I have no idea. There are some bubbles on the dipstick after a run and the entire pump does get slightly warm after running a bit.
Hope someone will have an idea I haven't thought of yet.
I've done a lot of searching on this site but still lost. Big thanks in advance!