5-4
LEFT TURN
LEFT TURN
When the steering wheel is turned to the left, the pressure oil from the steering unit fill on the left side
chamber of main steering spool (M), and main steering spool moves to the right in the direction.
At the same time of moving of main steering spool, LS signal will be blocked. Refer to page 5-8.
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 left side.
The rate of movement of main steering spool is concluded as flow rate, which is kept in left chamber
from steering unit. Furthermore the rate controls speed of movement for cylinder.
·
·
·
·
MCV
Return line
Fan & brake pump
6
14
22
21
23
24
1
11
39
9
25
27
27
28
RH
LH
CL
CR
L
EF
R
P
LS
T
Ps
Ts
ELECTRONICS
1
4
X1
X2
X3
S1
B2
L3
L4
B1
L1
L2
S1
S2
X1
X2
P
T
L
R
PS
2
3
8'
8
7
M
CF
Priority valve
2)
2)
760F5SE03
Summary of Contents for HL955
Page 557: ...7 6 MEMORANDUM MEMORANDUM ...
