Complete systems where the tank is mounted on the trailer and gearbox with the pump hanging on the PTO shaft.
With this system, lower the tractor's engine and get more fluent crane driving. The system is oil filled and tested.
Smaller or larger pumps can be chosen, do not exceed the capacity of the valve.
Checking should be done so that the gearbox can fit.
Gearbox with gear ratio 1: 3.8 and a 25cc pump gives at
300 PTO 29L
350 PTO 33L
540 PTO 51L