Hyundai HL955 Manual page 409

3) 3) RIGHT TURN RIGHT TURN
LH
9
39
CL
8'
ELECTRONICS
2 4
M
1 3
CF
EF P
Priority valve
L
6
P
·
When the steering wheel is turned to the right, the pressure oil from the steering unit fill on the right
side chamber of main steering spool (M), and main steering spool moves to the left in the direction.
·
At the same time of moving of main steering spool, LS signal will be blocked. Refer to page 5-9.
·
If LS signal of main steering spool is blocked, it cause to increase pressure of left chamber of priority
valve and then priority valve to be pushed to left side. Consequently, oil will flow via CF of priority
valve to main spool. That oil will push steering cylinder rod out and it will cause wheel loader to be
steered to right side.
·
The rate of movement of main steering spool is concluded as flow rate, which is kept in right cham-
ber from steering unit. Furthermore the rate controls speed of movement for cylinder.
14
RH
7
CR
8
L
R
Ps
Ts
LS T
R
11
X1
T
1
28
PS
B1
S1 L2
MCV
27
27
S1
X2
X3
X2
X1
B2
S2 L4 L3
L1
5-5
Return line
22
23
24
25
21
Fan & brake pump
760F5SE04