Service Manual User guide

Reference Diagrams
4-5 Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
X
X
BOOM TELESCOPE CYLINDER
ACCUMULATOR
BOOM ROLL BACK HOSES
VALVE
@ 3150 PSI
@ 2500 RPM
18 GPM
@ 2650 PSI
ORBITR
O
18 GPM
@ 2500 RPM
VALVE
C.B.
AUX. 1
TILT CYLINDER
FRONT CARRIAGE
OPTIONS
QUICK DISCONNECTS
SWITCH
WARNING
PRESSURE
BRAKE
LOW
12V
PRECHARGE
400 PSI
CYLINDERS
STEER
FRONT
BRAKES
FRONT
BRAKE
UPPER HYDRAULICS
LOWER HYDRAULICS
V
A
VALVE
SELECTOR
P1
B1
P2
B3
A1
A3
.020
.020
VENT
PARK BRAKE VALVE
PULL TO APPLY BRAKE
PUSH TO RELEASE BRAKE
PARK BRAKE PRESS. SWITCH
PARK BRAKE CYLINDER
CLOSED BELOW 100 PSI
OPEN ABOVE 100 PSI
2.50" BORE x 2.62" STROKE
SPRING APPLIED /
HYDRAULICALLY RELEASED BRAKE
FRONT OF MACHINE
T1
T
LS
P
A
B
C
CLOSED BELOW 850 PSI
OPEN ABOVE 850 PSI
LS
CF
1075/1950 PSI
ACG
EF
PUMP 1 PUMP 2
STABILIZER "G1" STABILIZER "G2"
BRAKES
STEERING
PILOT
ACCUMULATOR
P1
B1
PRESSURE
FILTER
OPEN BELOW 250 PSI
CLOSED ABOVE 250 PSI
2750 PSI 3175 PSI
SEE SERVICE MANUAL SEE SERVICE MANUAL
330 PSI
2375 PSI
460 PSI
400 PSI PRE-CHARGE
1075 PSI LOW LIMIT
1950 PSI HIGH LIMIT
AC
SW
FRAME TILT CYLINDER
3500 PSI
C.B. VALVES
460
PSI
G1 GAGE
PD1
T1
PSI
250
OR1
.043
ACC
SV1
PS1
.043
OR2
SWFB
BR
170
PSI
PD2
PSI
110
B
SH
PORT
A
G3
GAGE
RB PIL
REAR AXLE STABILIZER
G2 GAGE
SERVICE BRAKE PRESSURE SWITCH
T2
CONTROL VALVE
PORT
PORT
60 PSI
.040
OR3
PSI
160 PSI
2450
1
2
Schematic, Model 644B w/Naturally Aspirated Engine, Mid-Inlet Hydraulic System - Diagram 2