HYDRAULIC SYSTEM
6-9
D569-W02 May-2003
1.3 STRUCTURE AND OPERATION
A. STRUCTURE
(1) Gear Pump
(2) Orbital Unit
(3) PTO Clutch Valve
(4) Front Hydraulic Block
(5) Quick Couplers (If Equipped)
The hydraulic system of the 8454 tractor is composed
of the main components as shown in the figure.
This system has the following three functions.
1. To raise and lower the implement connected to the
three point hitch. For this motion, the control valve
(6) and the linkage installed on the hydraulic cylin-
der body provide three different applications’ posi-
tion control, draft control, and mixed control.
2. Take out hydraulic power from the front hydraulic
block assembly (4) to operate an implement’s hy-
draulic actuator.
(6) Control Valve
(7) Hydraulic Cylinder
(8) Oil Filter Cartridge
(9) Oil Tank (Transmission Case)
3. Take out hydraulic power from the quick couplers
(5) included in the auxiliary control valve assembly
(if equipped) for the implements with actuators. In
this case, the implement’s cylinders can be actu-
ated by pirating the auxiliary control valves.
569W605A
www.mymowerparts.com
K&T Saw Shop 606-678-9623 or 606-561-4983
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