UENR3623
September 2012
Volume 2 of 2: Heavy Lift
336F Excavator (Pilot)
Hydraulic System
TZA1-UP
RKB1-UP
YFD1-UP
LCL1-UP
NBL1-UP
KFT1-UP
DSW1-UP
WTZ1-UP
Printed in U.S.A.© 2012 Caterpillar, All Rights Reserved
ONE POSITION TWO POSITION THREE POSITION
VENTED
PRESSURIZED
RETURN ABOVE FLUID LEVEL RETURN BELOW FLUID LEVEL
LINES CROSSING LINES JOINING
TWO - WAY THREE - WAY FOUR - WAY
SPRING CONTROL VALVES RESTRICTION LINE RESTRICTION
(FIXED)
PUMP
(2 - SECTION)
SPRING
(ADJUSTABLE)
VARIABILITY LINE RESTRICTION
(VARIABLE)
PRESSURE
COMPENSATION
PUMP
(VARIABLE & PRESSURE
COMPENSATED)
MEASUREMENT
PRESSURE TEMPERATURE FLOW
ROTATING SHAFTS
UNIDIRECTIONAL BIDIRECTIONAL
PUSH - PULL LEVER PEDALGENERAL MANUAL PUSH BUTTON SPRING
FIXED
DISPLACEMENT
VARIABLE DISPLACEMENT
NON-COMPENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
VALVE ENVELOPES VALVE PORTS
FLUID CONDITIONERPUMP OR MOTOR
FLUID POWER SYMBOLS
UNIDIRECTIONAL
BIDIRECTIONAL
RELEASED PRESSURE
EXTERNAL RETURN INTERNAL RETURN
REMOTE SUPPLY PRESSURE
SIMPLIFIED
HYDRAULIC PUMPS
ACCUMULATORS
SPRING LOADED GAS CHARGED
SOLENOID
OR MANUAL
SOLENOID
& PILOT
SOLENOID &
PILOT OR MANUAL
SOLENOID SERVO THERMAL DETENT
HYDRAULIC & PNEUMATIC CYLINDERS
DOUBLE ACTINGSINGLE ACTING
BASIC
SYMBOL
SPRING
LOADED
CHECK VALVES
2 POSITION
INFINITE
POSITIONING
FLOW IN ONE
DIRECTION
FLOW IN
EITHER
DIRECTION
3 POSITION
CROSS
FLOW
PARALLEL
FLOW
INTERNAL PASSAGEWAYS
NORMAL POSITION
AB
PT
AB
PT
SHIFTED POSITION INFINITE POSITION
CONTROL VALVES
ATTACHMENT
MANUAL SHUTOFF
SHUTTLE PILOT
CONTROLLED
MAIN AUX
LINE RESTRICTION
(VARIABLE & PRESSURE
COMPENSATED)
MANUAL CONTROL SYMBOLS
HYDRAULIC MOTORS
FLUID STORAGE RESERVOIRS
CROSSING & JOINING LINES
VALVES
PILOT CONTROL SYMBOLS
COMBINATION CONTROLS
BASIC COMPONENT SYMBOLS
ENERGY TRIANGLES
HYDRAULIC PNEUMATIC
INTERNAL
SUPPLY PRESSURE
COMPLETE
FIXED
DISPLACEMENT
VARIABLE DISPLACEMENT
NON-COMPENSATED
HYDRAULIC SYMBOLS (ELECTRICAL)
ELECTRICAL SYMBOLS TABLE
325-AG135 PK-14
HARNESS IDENTIFICATION CODE THIS EXAMPLE
INDICATES WIRE 135 IN HARNESS “AG”
325-PK-14
WIRE GAUGE
WIRE COLOR
CIRCUIT NUMBER
IDENTIFICATION
WIRE NUMBER IDENTIFICATION CODES
CURRENT STANDARD
PREVIOUS STANDARD
ELECTRICAL SCHEMATIC EXAMPLE HYDRAULIC SCHEMATIC EXAMPLE
325-PK
WIRE COLOR
CIRCUIT NUMBER
IDENTIFICATION
B
WIRE
WIRE
(EXAMPLE VALVE)
CURRENT STANDARD
TRANSDUCER
(FLUID)
M
ELECTRIC MOTORTRANSDUCER
(GAS / AIR)
G
GENERATOR
PRESSURE SWITCH ELECTRICAL WIREPRESSURE SWITCH
(ADJUSTABLE)
TEMPERATURE
SWITCH
PRESSURE
SWITCH
TEMPERATURE
SWITCH
LEVEL
SWITCH
FLOW
SWITCH
ELECTRICAL SYMBOLS (ELECTRICAL)
A
CIRCUIT NUMBER
IDENTIFICATION
WIRE
COLOR
WIRE GAUGE
T
UENR3623
30 Page, (Dimensions: 39 inches x 28 inches)
Volume 2 of 2: Heavy Lift Version
Volume 1 of 2: Standard Version
PRELIMINARY
UENR3623 VOL 1 of 2
30 Page, (Dimensions: 39 inches x 28 inches)
Components are shown installed on a fully operable machine with the key and engine off, transmission shifter
in neutral and with parking brake set.
Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations.
SCHEMATIC PART NUMBER: 369-8512, CHANGE: 01, VERSION: HE
THIS SCHEMATIC IS FOR THE 336F EXCAVATOR (PILOT) HYDRAULIC SYSTEM
MEDIA NUMBER: UENR3623 VOLUME 1 OF 2
1
2
3
4
56
7
8
A
C
D
E
F
1
23
4
56
7
8
A
B
C
D
E
F
B
38 ESP PUMP 2 SOL
37 ESP PUMP 1 SOL
22 HEAVY LIFT SOL
21 SWING PRIORITY SOL
20 HYD LOCK SOL
19 STRAIGHT TRAVEL SOL
18 TRAVEL SPEED CHANGE SOL
17 SWING BRAKE SOL
13 BOOM REGEN REPRV
11 PUMP 2 PRESS SENSOR
10 PUMP 1 PRESS SENSOR
9 NFC 2 PRESS SENSOR
8 NFC 1 PRESS SENSOR
7 BOOM CYLINDER HEAD PRESS SENSOR
6 SWING CONTROL PRESS SENSOR
5 BOOM DOWN CONTROL PRESS SENSOR
3 IMPLEMENT PRESS SWITCH
2 RIGHT TRAVEL PRESS SWITCH
1 LEFT TRAVEL PRESS SWITCH
IDENT CONNECTOR
N
O
T
E
ITEM QTY
MEAS
UNIT
PART NO. NAME
MISC REF
- - 158-8987 FILTER GP
- - 158-9085 VALVE GP
- - 164-6981 ACCUMULATOR GP
- - 188-4145 FILTER GP
- - 215-5037 VALVE GP
- - 234-4440 SWIVEL GP
- - 289-8194 FILTER GP
- - 322-8714 VALVE GP
- - 323-7560 VALVE GP
- - 323-7610 VALVE GP
- - 323-7947 VALVE GP
- - 323-7948 VALVE GP
- - 334-9973 MOTOR GP
- - 335-0200 VALVE GP
- - 335-0300 VALVE GP
C - - 352-6860 ACCUMULATOR GP
- - 352-7065 VALVE GP
- - 352-7070 VALVE GP
B - - 352-7176 VALVE GP
- - 355-5668 MOTOR GP
- - 369-8502 VALVE GP
A - - 369-8540 VALVE GP
B - - 369-8542 VALVE GP
- - 377-4950 PUMP GP
369-8512
VALVE GP
369-8540
ACCUMULATOR GP
164-6981
352-6860 NOTE C
VALVE GP
352-7065
VALVE GP
323-7948
VALVE GP
323-7947
VALVE GP
369-8502
VALVE GP
215-5037
VALVE GP
323-7560
VALVE GP
335-0300
VALVE GP
322-8714
MOTOR GP
355-5668
SWIVEL GP
234-4440
VALVE GP
322-8714
MOTOR GP
355-5668
MOTOR GP
334-9973
FILTER GP
188-4145
FILTER GP
289-8194
FILTER GP
158-8987
PUMP GP
377-4950
6
20
17
18
19
5
3
2
1
VALVE GP
323-7610
VALVE GP
335-0200
VALVE GP
158-9085
7
21
???? ???? ???? ???? ???? ????
13
???? ????
10 11
???? ????
???? ?????? ??
NOTE B: FOR HEAVY LIFT SEE VOLUME 2
NOTE A: FOR STANDARD SEE VOLUME 1
NOTE C: FOR CANADA BC/AL REGULATION
VALVE GP
352-7070
?? ???? ???? ???? ??
8 9
?? ???? ??
38
37
?? ???? ???? ??
TP
TT
TRAVEL(L)
TRAVEL(R)
(FWD)
(BKWD)
(FWD)
(BKWD)
T1
T5
T2
T4
T6
T3
(OUT) (IN) (R)
(L)
(CLOSE)(OPEN)
(DOWN) (UP)
JLP
JLT
JRP
JRT
BOOM
BUCKET
STICK
SWING
JL1 JL3 JL2 JL4 JR4
JR2 JR3JR1
1
1
2
2
3
3
4
4
5
5
6
6
P
A
B
T
BOOM CYLINDERSTICK CYLINDER
BUCKET CYLINDER
A
B
MU
DR
PG
SWING MOTOR
SWG
PRKG BK
CONTROL
SWG
MOTOR
DRAIN
(L)
(R)
A1
B1
DR
AG
BG
T
OUT
PG
PC
IN
A
E
C
B
ST
SP1
BT
BP1
PUMP-S1
PUMP-S2
DR6
T-OUT1
DR5
Pi2
DR4
DR3
P2
P-IN
PSA2
DR1
PSA1
DR2
T-OUT2
Pi1
PAC
SWG
PRKG BK
CONTROL
2 SPEED
TRAVEL
CONTROL
P1
TRAVEL MOTOR (LEFT)
TRAVEL MOTOR (RIGHT)
Pp3
B
A
B
A
AG
AG
BG
BG
T2
T2
T1
T1
Pp3
(FWD)
(FWD)
(BKWD)
(BKWD)
2 SPEED
TRAVEL
CONTROL
DRAIN
FILTER
SWG
MOTOR
DRAIN
NFC1
NFC2
DRAIN
FILTER
A2
A1
S1
DrM
M4
M1
M2
S3
Dr
A3
M3
pR5b
pL6f
pL3b
pL5f
pR5f
pL3f
pL4b
pR4b
pSR
pR6f SPi
pR2bpL2bpL1fpR1f
pL5b
pR3b
?? ??
PD-Pi
PD-Dr
A1 A2 A3 A4 A5 A6 A7 A8
B1 C1 B2 B3 C2 B4 C3 B5 B6 B7 C4 B8
PRV-T
pR3f
BPi
pBR
L5 L6
R3
R5
BP2
SP2
R4L4
MU
R.C.V-D
MF-P
MF-TANK
R.C.V-D
pR5f
L2
L1
R3
pR3b
pL2b
pL3f
pL5b
pL3b
pL4b
L5
L4
pL5f
pR1f
R5
R4
L6
pR6f
pR2b
pSR
MU
R1
R2
SP2
SPi
pR3f
pR4b
pST
dST
P1 P2
pL6f
SDr
pL1f
pR5b
dR1b
RDr
pBR
T
R6
ST6
(IN)
STICK(2)
(OUT)
(OUT)
BUCKET
STICK(1)
(IN)
(R)
BRG
(L)
(UP)
SWING
(UP)
BT3
L3
BOOM(1)
BOOM(2)
(DOWN)
(FWD)
TRAVEL(R)
(BKWD)
(FWD)
TRAVEL(L)
STR-TRAVEL
(BKWD)
BP2
BPi
BDr
(OPEN)
(CLOSE)
PRV-T
MF-TANK
PD-Dr
PD-PiMF-PpST
dST
BDr
dR1b
SDr
RDr
R1L1 L2 R2
Q MAX Q MIN
Q MAX Q MIN
P2
P1
PRELIMINARY
UENR3623 VOL 2 of 2
30 Page, (Dimensions: 39 inches x 28 inches)
Components are shown installed on a fully operable machine with the key and engine off, transmission shifter
in neutral and with parking brake set.
Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations.
SCHEMATIC PART NUMBER: 369-8512, CHANGE: 01, VERSION: HE
THIS SCHEMATIC IS FOR THE 336F EXCAVATOR (PILOT) HYDRAULIC SYSTEM
MEDIA NUMBER: UENR3623 VOLUME 2 OF 2
1
2
3
4
56
7
8
A
C
D
E
F
1
23
4
56
7
8
A
B
C
D
E
F
B
369-8512
VALVE GP
369-8542
ACCUMULATOR GP
164-6981
352-6860 NOTE C
VALVE GP
323-7948
VALVE GP
323-7947
VALVE GP
369-8502
VALVE GP
215-5037
VALVE GP
323-7560
VALVE GP
335-0300
VALVE GP
322-8714
MOTOR GP
355-5668
SWIVEL GP
234-4440
VALVE GP
322-8714
MOTOR GP
355-5668
MOTOR GP
334-9973
FILTER GP
188-4145
FILTER GP
289-8194
6
20
17
18
19
5
3
2
1
VALVE GP
323-7610
VALVE GP
335-0200
VALVE GP
158-9085
7
21
13
10 11
VALVE GP
352-7070
FOR NOTES SEE VOLUME 1
22
VALVE GP
352-7176
?? ???? ??
8 9
?? ???? ???? ???? ???? ??
TP
TT
TRAVEL(L)
TRAVEL(R)
(FWD)
(BKWD)
(FWD)
(BKWD)
T1
T5
T2
T4
T6
T3
(OUT) (IN) (R)
(L)
(CLOSE)(OPEN)
(DOWN) (UP)
JLP
JLT
JRP
JRT
BOOM
BUCKET
STICK
SWING
JL1 JL3 JL2 JL4 JR4
JR2 JR3JR1
1
1
2
2
3
3
4
4
5
5
6
6
P
A
B
T
BOOM CYLINDERSTICK CYLINDER
BUCKET CYLINDER
A
B
MU
DR
PG
SWING MOTOR
SWG
PRKG BK
CONTROL
SWG
MOTOR
DRAIN
(L)
(R)
A1
B1
DR
AG
BG
T
OUT
PG
PC
IN
A
E
C
B
ST
SP1
BT
BP1
PUMP-S1
PUMP-S2
DR6
T-OUT1
DR5
Pi2
DR4
DR3
P2
P-IN
PSA2
DR1
PSA1
DR2
T-OUT2
Pi1
SWG
PRKG BK
CONTROL
2 SPEED
TRAVEL
CONTROL
TRAVEL MOTOR (LEFT)
TRAVEL MOTOR (RIGHT)
Pp3
B
A
B
A
AG
AG
BG
BG
T2
T2
T1
T1
Pp3
(FWD)
(FWD)
(BKWD)
(BKWD)
2 SPEED
TRAVEL
CONTROL
DRAIN
FILTER
SWG
MOTOR
DRAIN
NFC1
NFC2
A
PT
PAC
P1
A2
A1
S1
DrM
M4
M1
M2
S3
Dr
A3
M3
DRAIN
FILTER
pR5b
pL6f
pL3b
pL5f
pR5f
pL3f
pL4b
pR4b
pSR
pR6f SPi
pR2bpL2bpL1fpR1f
pL5b
pR3b
?? ??
PD-Pi
PD-Dr
A1 A2 A3 A4 A5 A6 A7 A8
B1 C1 B2 B3 C2 B4 C3 B5 B6 B7 C4 B8
PRV-T
pR3f
BPi
pBR
L5 L6
R3
R5
BP2
SP2
R4L4
MU
R.C.V-D
MF-P
MF-TANK
R.C.V-D
pR5f
L2
L1
R3
pR3b
pL2b
pL3f
pL5b
pL3b
pL4b
L5
L4
pL5f
pR1f
R5
R4
L6
pR6f
pR2b
pSR
MU
R1
R2
SP2
SPi
pR3f
pR4b
pST
dST
P1 P2
pL6f
SDr
pL1f
pR5b
dR1b
RDr
pBR
T
R6
ST6
(IN)
STICK(2)
(OUT)
(OUT)
BUCKET
STICK(1)
(IN)
(R)
BRG
(L)
(UP)
SWING
(UP)
BT3
L3
BOOM(1)
BOOM(2)
(DOWN)
(FWD)
TRAVEL(R)
(BKWD)
(FWD)
TRAVEL(L)
STR-TRAVEL
(BKWD)
BP2
BPi
BDr
(OPEN)
(CLOSE)
PRV-T
MF-TANK
PD-Dr
PD-PiMF-PpST
dST
BDr
dR1b
SDr
RDr
R1L1 L2 R2
HPi
SOL1-T
HPi
SOL1-T
Q MAX Q MIN
Q MAX Q MIN
P2
P1
VALVE GP
352-7065
PUMP GP
377-4950
38
37
FILTER GP
158-8987
