Hydraulic pumps are power hogs, so you need to KNOW what size fuse is required for it. I'd suggest calling the mfg. again and ask what size fuse is recommended.
I'd still check all the connections you can find in the circuit and remake or retighten them. A loose connection at a termination will cause high current draw and could cause fuses to blow.
As I said above, if it's not a loose connection it's either the motor or the pump binding.
Salem 29RKSS Pushing a 2500 Mega-Cab CTD!
Gotta go campin!