Hyundai HL955 Manual page 414

(4) (4) Pressure reducing valves Pressure reducing valves
·
Pressure reducing valve is a valve, which is supplying pilot oil to steering unit.
That is one of advantage of steering system adopting steering valve.
·
Pressure reducing valves are pressure-limiting devices that limit pressure in one portion of a circuit
while leaving system pressure unaffected.
Pressure reducing valves allow flow to pass from (1) to (2) until the pressure at (1) reaches the pre-
determined setting, at which point the spool shifts to restrict input flow from (1) (reducing mode) or
to open flow from (2) to (3) (relieving mode) as needed to maintain the regulated pressure at (2).
(5) (5) Relief valve Relief valve
1 Plastic plug
2 Adjustment screw
3 Spring
FUNCTION FUNCTION
The main relief valve is inside the steering valve, and set the maximum circuit pressure of the
steering circuit.
When the steering valve is being actuated, if the steering circuit goes up above the set pressure of
this valve, oil will be relieved, the priority valve spool will be actuated, and the oil will be flow to EF
port.
1 2
1 2 3 4 5
4
5
5-10
3
Thrust pad
Valve seat
7607SE15
7607SE16