Three Point Hitch Hydraulic System; Hydraulic Circuit - Kubota M8540 Workshop Manual

M8540, M9540, WSM

3. THREE POINT HITCH HYDRAULIC SYSTEM

[1] HYDRAULIC CIRCUIT

1. When the engine is started, the hydraulic pump (11) is rotated to draw oil from transmission case (10) through the
suction pipe.
Supplied oil is filtered by the hydraulic oil filter cartridge (9).
2. Filtered oil is forced out by the hydraulic pump to the auxiliary control valve (1) through the hydraulic outlet (13).
3. With the auxiliary control valve (1) and (2) in neutral position, oil is channeled from "N" port to the control valve (3).
4. The hydraulic system has a relief valve (7) which restricts the maximum pressure in the circuit.
The hydraulic cylinders (6) have a cylinder safety valve (5) to relieve shock pressure due to heavy implement
bounce.
5. The control valve (3) is actuated by the mechanical linkage for "Position control" or "Draft control" or both "Mix
control" (combining position control with draft control).
8-M7
HYDRAULIC SYSTEM
(1) Auxiliary Control Valve (S/D)
(2) Auxiliary Control Valve
(SCD)
(3) Control Valve
(4) Lowering Speed Adjusting
Valve
(5) Cylinder Safety Valve
(6) Hydraulic Cylinder (Exterior)
(7) Relief Valve
(8) Hydraulic Pump (for Power
Steering)
(9) Hydraulic Oil Filter Cartridge
(10) Oil Tank (Transmission
Case)
(11) Hydraulic Pump (for 3-point)
(12) Trailer Brake (Option)
(13) Hydraulic Outlet
(a) To Power Steering
Controller
A : To Implement Cylinder
B : To Implement Cylinder
C : To Trailer Brake Coupler
N : N Port
W1013426
KiSC issued 09, 2008 A