... valve)
(Pi4) Pilot port (straight travel solenoid valve)
(R2) Return port
(R3) Return port
Illustration 3 g00749165
(10) Straight travel solenoid valve
(11) Right travel control ... mounted on the stick drift reduction valve. The line relief valve (stick cylinder head end) (30) is also
located on the left body.
b. When the joysticks and/or travel levers/pedals are in the NEUTRAL ...
Systems Operation
320C U Excavator Hydraulic System
Main Control Valve
SMCS - 5051
Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 320C EXCAVATOR MAC
Configuration: 320C U...
... pump)
(8) Port (pilot oil to proportional reducing valve)
(9) Housing
(10) Port (pressure sensor)
Page 2 of 5320C U & 320C LU Excavators MAC00001-UP (MACHINE) POWERED BY 3066 Engine(S
... Operation
320C U Excavator Hydraulic System
Main Hydraulic Pump
SMCS - 5070
Construction
Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 320C EXCAVATOR MAC
Configuration: 320C U...
...
z
Engine speed sensor (75) that is located on the flywheel housing
z
Right pump pressure sensor (71)
z
Left pump pressure sensor (72)
z
Monitor in the cab (69)
z
Feedback sensor (73) at governor ... g00748938
Ports and solenoids at pilot manifold
(45) Swing parking brake solenoid valve
(46) Valve (hydraulic activation)
(52) Travel speed solenoid valve
(54) Hydraulic activation solenoid valve ... passage (56) flows to travel speed solenoid valve (52). When the travel speed switch on the right console is set at the HIGH
SPEED position, the travel speed solenoid valve opens. This allows...
... AS.
IMPLEMENT
PRESSURE
106-0179
SENSOR GP
PUMP DRIVE
PRESSURE
221-8869
SENSOR GP
PUMP DRIVEN
PRESSURE
221-8869
VALVE GP
LOCK SOL
121-1491
VALVE GP
SWING
BRAKE SOL
121-1491
VALVE GP
TRAVEL
SPEED SOL
121-1491
FILTER ... CLOSE DOWN
UP
P1
P2 Pi1 P-IN PSA2 DR1 PSA1
T-OUT2 DR2
DR3 DR4 Pi2 DR5 DR6T-OUT1
B1
A1
A2
B2
OUT
T
PG
PC
IN
Pi1
PS1D0
A4 B1 Dr1 Di PS2 PB
Pi2
a2
a5
A2
a3
PSV
A1
a1
a4
aL5
Dr
HL
R2
X
dL5 (IN,OUT)(DOWN)(OPEN)bL2(FWD)
Pp1
PiH
dST1(FWD)(L)dSWPiL(IN)dR5APi2dR4
R1
Y
AR4
R3
HR
(UP)
aL4
ADr
APi
(OUT)
(R)...