HARNESS IDENTIFICATION CODE THIS EXAMPLE INDICATES WIRE 135 IN HARNESS “AG” WIRE CIRCUIT NUMBER IDENTIFICATION
325-AG135 PK-14
CIRCUIT NUMBER IDENTIFICATION
WIRE COLOR
WIRE COLOR
WIRE GAUGE
325-PK
PREVIOUS STANDARD WIRE
20
WIRE COLOR
B
325-PK-14
CIRCUIT NUMBER IDENTIFICATION
5
12
30
18
25
19
17
OPERATOR CONTROL (CAB REMOVED)
13
31
27
MACHINE COMPONENT LOCATIONS
WIRE GAUGE
A
(EXAMPLE VALVE)
(Dimensions: 39 inches x 28 inches)
29
30 Page,
4
UENR2474-01
24
8
7
(5) BUCKET CYLINDER
(6) STICK CYLINDER
6
5 (11) MOTOR GP SWING 334-9968
(4) BOOM CYLINDER
SWING MOTOR
4 (12) MOTOR GP TRAVEL (LEFT) 209-5992
TRAVEL MOTOR (LEFT)
3
2
1
(13) MOTOR GP TRAVEL (RIGHT) 209-5992
TRAVEL MOTOR (RIGHT)
PG DR
F
F
MU
AR3
BR3
AL3
BL3
AR4
AG
BR4
BG DR
A1
B1
FINE SWING
(29) VALVE GP SWING CUSHION 322-8716
(25) VALVE GP PILOT (TRAVEL) 310-0414
TP TT
AG
Pp3
Pp3
T1
T1
T2
T2
BG
BG
AG
TRAVEL(R)
TRAVEL(L)
BL2
E
(FWD) T2
(BKWD) T1
T5
bL1
(BKWD) T3
aL1
T6
aR1
A
B (L)
(R) A
(30) VALVE GP TRAVEL COUNTERBALANCE (LEFT) 322-8714
AL2
A
B
B (BKWD) AR1
(FWD) BL1
(BKWD) AL1
(FWD) T4
(31) VALVE GP TRAVEL COUNTERBALANCE (RIGHT) 322-8714
(FWD) BR1
(20) SWIVEL GP 234-4440
bR1
(19) SWITCH AS PRESSURE (RIGHT TRAVEL) 309-5769
(18) SWITCH AS PRESSURE (LEFT TRAVEL) 309-5769
(23) VALVE GP LOAD CONTROL (STICK DRIFT REDUCTION) 255-5680
SPi BR5 aL4
BL3
AL3
SP2
SP3
3
6
T
2
4
(L)
(BACK)
BP2
BR3
BR2
(BACK)
AR3
aR4
AR2
BP1 BT BR4 R1
(DOWN)
(CLOSE)
D
R3
(IN)
2
BOOM
BUCKET
(OUT)
(FWD)
(R)
(IN) JL3
(R) JL2
(L)
(OPEN)(CLOSE) JR2 JR4
JL4
(DOWN) JR1
(UP) JR3
HL
Pi2
bL4
STICK(2)
(UP)
C
(OUT)
bR1 bR4
bR3
bL2
bL3
(OPEN)
bR2
bL1
(OUT) JL1
ATCH
(FWD)
BOOM(1)
SWING
BUCKET
STICK
JRT
TRAVEL(L)
JLT
SWING
JRP
STICK(1)
JLP
TRAVEL(R)
(3) CONTROL GP JOYSTICK (RH) 297-0532
BOOM(2)
(Dimensions: 39 inches x 28 inches)
30 Page,
3
6
(2) CONTROL GP JOYSTICK (LH) 297-0533
C
aR1
aR2 (IN)
AR5
Pi1
aR3
aL1
BR5
AR4
AR1
AL1
BL2
BP3
BR4
1 5
UENR2474-01
(UP)
1
4
SP1 ST BL3 R2
BR1
BL1 AL2
aL3
AL4
(24) VALVE GP MAIN CONTROL 259-7464
aL2
AL4
D
(22) VALVE GP LOAD CONTROL (BOOM DRIFT REDUCTION) 255-5683
BPi
AR5
5
E
PL
bR5
HR
PR
(28) VALVE GP SHUTTLE 164-6979
FR
RR U
P2
P-IN
Pi1
PSA2 DR1
PSA1
T-OUT2
(10) MANIFOLD GP CONTROL (PILOT OIL SUPPLY)
DR2
215-5037
B
B1
A1
B2
(16) SENSOR GP PRESSURE DRIVEN PUMP 336-9312
(26) VALVE GP PRESSURE REDUCING (BOOM, SWING PRIORITY) 310-0210
A2
(14) PUMP GP MAIN HYDRAULIC 376-8862
HL
G2
BB (1) ACCUMULATOR GP HYDRAULIC (CHARGED) 164-6981
P1 PAC A1
A2
A4
A3
A5
A6
A7
(27) VALVE GP SHUTTLE 185-0462
A8
DR4
DR3
Pi2
DR5
T-OUT1
Dr P1
Pn2
M2
Ps2
PL
A2
P2
HYDRAULIC CIRCUIT COLOR DESCRIPTIONS PILOT PUMP OUTPUT DRIVEN PUMP OUTPUT STEERING CIRCUIT SUPPLY LINE STICK CYLINDER CONTROL CIRCUIT LEFT TRAVEL MOTOR CONTROL CIRCUIT SWING MOTOR CONTROL CIRCUIT DRAIN / RETURN LINE SWING BRAKE CONTROL CIRCUIT DRIVE PUMP OUTPUT TRAVEL SPEED CONTROL BUCKET CYLINDER CONTROL CIRCUIT RIGHT TRAVEL MOTOR CONTROL CIRCUIT BOOM CYLINDER CONTROL CIRCUIT
EE
PsM2 G4
DR6
S1
B
Pm
S3 A3 B1
B2
B4
B3
aR3
bR3
aL4
Pi1
B5
B6
B7
bL2
BPi
A bR4
B8 Pi2 aL3
SPi
(21) VALVE GP CHECK 369-8420
bR5
aR4
B
D
C
(17) SWITCH AS PRESSURE (IMPLEMENT) 309-5769
PG
G E
F
(7) FILTER AND VALVE GP PILOT (HYDRAULIC OIL) 158-8987
(8) FILTER GP OIL (HYDRAULIC RETURN) 188-4140
Drain / Return Lines Component Group
G1
Callout Number (Machine Location from Component LocationsTable)
(15) SENSOR GP PRESSURE DRIVE PUMP 336-9312
SOS
Taps (Pressure, Sampling, Sensor - by letter)
YY
Pi
A
CALLOUTS
HR
PC
AA
Pilot / Load Sensing Pressure
FF
Pn1
M1
DD
Pressure Line
Ps1
A1
IN
T
A
8
OUT
R3
bL3
PR
LINE PATTERNS
PsM1
DrM
CC
(9) FILTER GP - OIL (HYDRAULIC, CASE DRAIN) 289-8194
aL2 bL4
G3
Dr
(52) VALVE GP - CONTROL 138-1234 Part Number
Component Name
THIS SCHEMATIC IS FOR THE 320D AND 323D EXCAVATOR AND 323D MHPU HYDRAULIC SYSTEM MEDIA NUMBER: UENR2474-01 SCHEMATIC PART NUMBER: 369-8400, CHANGE: 00, VERSION: HE Components are shown installed on a fully operable machine with the key and engine off, transmission shifter in neutral and with parking brake set.
