There are advantages and disadvantages to both direct and remote mounting a hydraulic pump to a power take-off.
Direct vs. Remote Mounting a Hydraulic Pump to a Power Take-off
NEWS & EVENTS - Optima Drive Components
Power Take-Offs & PTO Parts
Pros and Cons of Electric vs Hydraulic Motors
ePTO Electric Power Take-Off - ZF
VEVOR Dump Trailer Power Unit 12-Volt Hydraulic Pump 13 Quart
Blog
Metaris Aftermarket MH Series Dump Pumps - 101 Remote Mount, 102
Energies, Free Full-Text
Power Takeoff wet kits for end-dump applications
VEVOR 3200 PSI, 6 Quart Double Acting, Electric