New Holland WorkMaster 50 Service Manual page 388

Hydraulic systems - Hydraulic systems
Hydraulic systems - Overview
The hydraulic system on the tractor is for mechanical lift assembly to raise and lower the lift arms and thus the three
point linkage.
The high pressure hydraulic circuit is an open centre load sensing type.
The hydraulic lift is connected to the hydraulic pump. The pump flow is continuous in the hydraulic system even when
the circuit is not being operated.
High pressure pump is directly connected on rear side of engine timing gear. Oil is drawn from transmission case
through filter. The pump supplies constant oil flow according to engine speed. High pressure oil enters the distributor
valve located at the front of the lift assembly, which controls the raising and lowering of the lift.
All excess oil flow produced by the hydraulic pump is returned direct to the gear box through the control valve spool
located in the distributor.
Also located within the distributor is the lift cylinder safety valve, which protect the lift cylinder and seals from excessive
peaks of pressure during operation. For further details refer to the "hydraulic lift assembly".
47866583_ 02/12/2015
35.1 [35.000] / 3