Hyundai HX145LCR Manual page 175

9. BOOM FLOATING SYSTEM
C6
D6
Pc6
TURNING
JOINT
Pd6
Puo
C5
D5
Pc5
Pd5
DR5
Po5
C4
D4
DR3
Pc41
Pc40
Pd40
Pd41
V3
Pc3
DR2
Pa21
Pa20
P04
C2
D2
Pc2
Pd2
DR4
P03
C1
D1
Pc1
Pd1
DR0
P0
PS
Ai
Smooth and convenient boom movement is accomplished by only arm control lever operation.
The boom floating solenoid values are equipped in the rod and head of boom cylinder that are
controlled to act as floating mode.
"Rod to tank solenoid" and "Head to tank solenoid" are active. So the hydraulic oil of rod and head
goes to tank, and floating is accomplished. In the mode, boom down control solenoid is active so that
boom down pilot pressure is cut.
For more details, refer to page 5-13.
OPTION C
(DOZER)
OPTION B
ARM 1
BOOM 2
SWING
RELIEF
VALVE
TRAVEL
RIGHT
TRAVEL
STRAIGHT
Pd0
P1
P3
Pi1(Pump) Pi2(Pump)
Rs
Pn2
BUCKET
ARM
REGEN
Make up
valve
ARM 2
BOOM 1
P2
3-14
T
PS
E Pi1
Boom safety
Pn1
lock valve
Head to
tank solenoid
LC0
A1
B5
A5
LC1
Pb5
Pa5
Boom floating
solenoid valve
P04
B4
Pb4
Pa4
Pc42
Pc40
Pc41
Pb3
Boom
holding
valve
Pd41
B2
A2
Pb21
DR1
Pb20
A
Pa20
P02
PS
Patt
B1
A1
Pb1
Boom down control
solenoid valve
Pa1
TRAVEL
LEFT
T1
V2 Pi1 E
V2
Rod to
tank solenoid
SC0
A2
T
SC1
P
T
Shuttle block
(j, Boom down)
140L3HC33