Lull 1044C-54 Series II Service Manual - Manual (Page 67)

Reference Diagrams
31200079 4-1
Section 4 — Reference Diagrams
Diagram 4-1 — Mid-Inlet Hydraulic Schematic
MV0400
FILTER
EC
ARROW FILTER
50 MICRON
EF
LS
CF
PIL
ACC
OR3
UP
SW
CV
RV
1
T P
OR2
SV
0R1
2
(2X)
.080
ORFICES
VALVE
C.B.
OUTRIGGER CONTROL VALVE
PARK BRAKE CYLS
BOOM TELESCOPE CYLINDER
ACCUMULATOR
BOOM ROLL BACK HOSES
QUICK DISCONNECTS
ORBITROL STEER
2ND AUX.
HOIST/TELESCOPE
1ST AUX.
FORK TILT/TRANSFER
JOYSTICK
B2
A2
AUX. 1
TILT CYLINDER
FRONT CARRIAGE
OPTIONS
QUICK DISCONNECTS
PRECHARGE
400 PSI
UPPER HYDRAULICS
VALVE
VALVES CONTROL
A4 B4
VALVE
SELECTOR
P1 B1
P2
B3
A1
A3
.020
.020
#1 #3
#2
#4
A5 B5
P
T
P
T
P1 #4
P2 #2
PARK BRAKE PRESS. SWITCH
CLOSED BELOW 100 PSI
OPEN ABOVE 100 PSI
#1 #3
VIEWED FROM THE TOP
FRONT OF MACHINE
X
X
T
T
LS
P
PUMP
1
PUMP
2
ST
ABILIZER "G1"
ST
ABILIZER "G2"
BRAKES
STEERING
PILOT
ACCUMULA
TO
R
P A
PRESSURE
FILTER
3000 PSI 3150 PSI
SEE SER
VICE MANUAL
SEE SER
VICE MANUAL
330 PSI
2375 PSI
450 PSI
400 PSI PRE-CHARGE 1075 PSI LOW LIMIT
1950 PSI HIGH LIMIT
C.B.
VALVE
BRAKE
VALVE
L.H. OUTRIGGER
CYLINDER
C.B. VALVES
4000 PSI
R.H. OUTRIGGER
CYLINDER
OPTIONS
AUX. 2
C.B. VALVES
4000 PSI
FRAME TILT
CYLINDER
3500 PSI
C.B. VALVES
92 PSI
DIFF.
PRESSURE
SWITCH
SWITCH
PRESSURE
DIFF.
92 PSI
OUTRIGGERS
S1
S2
S3
RH LH
A8
B8
A7
B7
PARK BRAKE VALVE
PULL TO APPLY BRAKE
PUSH TO RELEASE
BRAKE
C A
B
ACCUMULA
TOR PRESSURE SWITCH
CLOSED BELOW 850 PSI OPEN
ABOVE 850 PSI
BRAKE PRESSURE SWITCH
CLOSED
ABOVE 250 PSI
OPEN BELOW 250 PSI
SPRING
APPLIED /
HYDRAULICALL
Y
RELEASED BRAKE FRONT
BRAKES
FRONT
STEER CYL