Vehicle System System Operation 27
Steering System
Steering System Schematic
(Non Load Sensing Open Center)
(1) Steering gear. (2) Hose (to hydraulic tank). (3)Hose.(to
steer cylinder) (4) Hose.(to steer cylinder) (5)Check Valve. (6)
Control Valve. (7) Steering Cylinder. (8)Hydraulic Pump. (9)
Hydraulic Tank. (10) Hose (to steer gear). (11) Hose. (12)
Priority Valve.
REFERENCE : For the Hydraulic System
Schematics.
The steering system is a non load sensing open
center type and uses hydraulic oil for its operation.
Oil flow through the steering system is open to tank
regardless of turn on a steering wheel. When the
steering wheel is turned, it allows metered oil flow of
steering gear(1) to steering cylinder(7).
Hydraulic oil is pulled from hydraulic tank (9) through
a strainer to hydraulic pump (8). The pump sends
the oil through hose (11) to prioriey valve (12).The
priority valve(12) supplies 12 Lpm of all pump flow to
steering gear(1) and make it’s remaider flow go to
the sections of control valve(6)
Check valve (5) in priority valve(12) is in hose
(10)near the steering gear to prevent oil flow back to
priority valve(12) priority, which could cause a
sudden jerk of the steering wheel. Relief valve in the
priority valve body will open if the steering pressure
goes above 9000 kPa (1300 psi).
Steering Cylinder
Steering cylinder (1) gives power assistance through
the use of pressure oil at either end of the cylinder
piston. The steering cylinder is double ended and
the body of the cylinder is mounted stationary to the
steer axle. The rod assembly is connected to the
steering link assembles at both ends of the cylinder
which allows the cylinder to move the link
assemblies.
Steering Cylinder
(1) Steering cylinder
.
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