Component Locations Part Number
Description A cc u mu a l t or G p- S t ee ri n g Cover C yl in de rG p( 2)
2 48 - 62 51
B-6 D-1, D-14, H-6, I-14
1 73 -5 98 1
3
F-5,F-6
2 62 - 19 00
4
F-13, G-1, J-2,J-4
6E-1549
5
G-11
(Center Shift) 262 1- 907
6
(BladeLift) (Blade Tip)
Cylinder Gp Cyl ni der Gp Cyl ni der Gp
1
(SideShift) 112- 5575
7
Cyl ni der Gp
Steering (LH) 130- 9041
8
C yl n i de rG p
Steering (RH) 1 30 9 - 04 2
C yl n i de rG p
(Wheel Lean) 1 21 9 - 24 2
M an fi ol d- L ef t
1 02 -8 38 5
M an fi ol d- R g i ht
1 02 -6 23 8
Mo o t rGp - G ea r
D-6 B-5
(Circle Drive) 1 05 -3 19 6
14
G-10
(Steering) 2 22 -3 76 9
15
E-7
16
C-10
17
C-9
M ot or G p- G er ot or
(Hydraulic Fan) 1 69 -4 88 3
SPRING (ADJUSTABLE)
VARIABILITY
S en so rG p- P re ss ur e S wi tc hA s- P re ss ur e
(Fan Drive) 1 67 -1 70 9 Note C 2 30 -5 77 1
18 19
Swi ve lGp
260- 6502
20
F-11
2 07 -2 41 0
21
C-13
V al ve G p- C he ck
(Fan Drive) 1 75 -0 44 7
22
B-5
9 T 5- 9 57
23
C-7
6 E- 30 28
24
(BladeTip) 6 E- 30 34
25
V al v eG p- C o m b i na it o n V al ve G p- C on rt ol
(Articulation)
V al ve G p- C on rt ol V al ve G p- C on rt ol
26
6 E- 30 35
27
E-11
(LeftBladeLift)
6 E- 30 37
28
E-13, H-4
V al ve G p- C on rt ol
(Right Blade Lift)
6 E- 30 31
29
E-2, H-3
30
E-12
V al ve G p- C on rt ol
(SideShift) 6 E- 30 36
V al ve G p- C on rt ol (Wheel Lean) Valve Gp - Mounting & (Fan Speed Solenoid)
6 E- 30 30
191-5292 Valve Gp - Pump Control (Pressure & Flow Compensator) (for Hydraulic Fan Pump) 195-9639 104-3122 (for Implement & Steering Pump) V al v eG p- S h ut tel Note B 1 31 - 07 53 Valve Gp - Unit Test 4 (LH) (Implement Control Valve Manifold) 6E-3038 Valve Gp - Unit Test 4 (RH) (Implement Control Valve Manifold) 6E-3032
E-3
32
C-11
33 34 35
C-10 C-9
36
E-14
PRESSURE
AA
33
1 2 24 24 26
12H, 140H and 160H Motor Grader Hydraulic System
29 31 37 53
1
16
4 1 4 2 43
BB
CC
17
34 21 32
C-8
V EN TE D
3
38
G-2, G-14
C yl i nd er G p- R i pp er
1 13 -7 75 4
39
J-11
C yl i nd er G p- S c ar i ife r
9 T 6- 95 1
40
J-10
41 42
A-6
The Following Control Valves may be located on either (LH)
43
V al v eG p- C on t or l
(Plow/Dozer Angle) 1 15 -1 00 7
44
I-7
V al v eG p- C o nt r ol
(Plow/Dozer Lift) 1 07 -0 54 7
45
I-8
V al v eG p- C on t or l
(Ripper) 1 07 -0 54 5
46
I-11
V al v eG p- C on t or l (Scarifier) 1 07 -0 54 3 Valve Gp - Control (Snow Wing LIft - Heel) Note A 137-8106
47
I-10
48
I-14
Valve Gp - Control (Snow Wing Tilt - Toe) Note A Valve Gp (2) - Mounting & (Blade Cushion Solenoid Valve) ValveGp-Relief
(Secondary Steering)
BD I R I EC TI ON AL
SOLENOID
SOLENOID or MANUAL
SOLENOID and PILOT
PUSH-PULL LEVER
SOLENOID and PILOT or MANUAL
MANUALSHUTOFF
G EN ER AL M AN U AL
F-2,F-13 A-7
S PR N I G
GAS CHARGED
LINESCROSSING
LINES JOINING
SINGLE ACTING
FIXED DISPLACEMENT
DOUBLEACTING
INTERNALPASSAGEWAYS
HYDRAULICMOTORS
VARIABLE DISPLACEMENT NON-COMPENSATED
INTERNAL SUPPLY PRESSURE
COMPLETE
HYDRAULIC AND PNEUMATIC CYLINDERS
VARIABLEDISPLACEMENT NON-COMPENSATED
INFINITE POSITIONING
TWO POSITION
THREE POSITION
UNIDIRECTIONAL
29 30 BIDIRECTIONAL
48 49
Machine Component Locations
I-12
50 51
PEDAL
SIMPLIFIED
CROSSING AND JOINING LINES
UNIDIRECTIONAL
49
DETENT
REMOTE SUPPLY PRESSURE
HYDRAULIC PUMPS FIXED DISPLACEMENT
machine dependent on machine arrangement.
253-1320 9T-8071
PU S HB U T TO N
INTERNALRETURN
SPRING LOADED
137-8104
THERMAL
PILOT CONTROL SYMBOLS
36 or (RH) 37 sideof
31 44 45 46 47
SERVO
RELEASED PRESSURE
ACCUMULATORS
24 25 26 27 28
RETURN BELOW FLUID LEVEL
MANUAL CONTROL SYMBOLS
18 22
13
RETURN ABOVE FLUID LEVEL
P RE SS UR Z I ED
EXTERNALRETURN
A-7 C-7
UN I DI R E CT O I NA L
COMBINATIONCONTROLS
1251-UP 1261-UP CCA1-UP ASD1-UP CBK1-UP APM1-UP CCP1-UP AMZ1-UP
35 19 2 3 5 1
(Blade Cushion) 1 62 -7 45 0
9 T- 10 13 9 T- 61 46
FLOW
TEMPERATURE
FLUID STORAGE RESERVOIRS
2
E-1
(Secondary Steering) (Secondary Steering)
P LI OT CONTROLLED
6 15
Schematic Location
V al ve G p- C he ck V al ve G p- C he ck
S HU TT LE
ROTATING SHAFTS
28 30 36 52
3
Pump Gp - Electric Drive (Secondary Steering) 123-8867
SPRING LOADED
BASIC SYMBOL
7
37
A c cu mu l at or G p( 2)
INFI I NFI N ITE I TE PO SI TI O N
MEASUREMENT
Machine Location
Part Number
FOUR-WAY
THREE-WAY
CHECK VALVES
PT SHIFT SHI FT ED E D PO SI TI O N
PT NORMAL POSITION
5
Attachments Description
TWO-WAY
AB
4
11 25 27
2
D-8
31
THREE PO SI TIO N
CONTROL VALVES AB
E-9
6 E- 30 29
(CircleDrive)
V al ve G p- C on rt ol
ATTACHMENT
LINERESTRICTION VARIABLE and PRESSURE COMPENSATED
VALVE PORTS
TWOPO SI TIO N
ONE POSITION
20 4
E-6
(Center Shift)
V al ve G p- C on rt ol
HYDRAULIC PNEUMATIC ENERGYTRIANGLES
VALVES VALVE ENVELOPES
38 50
B -5 B -7
T an kG p& F il e t r
PUMP:VARIABLEand 2-SECTIONPUMP PRESSURE COMPENSATED
LINERESTRICTION (FIXED)
RESTRICTION
PRESSURE COMPENSATION
LINERESTRICTION (VARIABLE)
9 40
Pump Gp - Piston (Implement & Steering) 169-4882
CONTROLVALVES
14
F-3
13
P um pG p- M et er n i g P um pG p- P si o t n
D-8
12
(Hydraulic Fan) 2 24 7 - 04 0
SPRING
FLUID CONDITIONER
8
F-4
10 11
MAIN AUX.
PUMPorMOTOR
G-8 G-7
BASIC COMPONENT SYMBOLS
10
G-12 9
FLUID POWER SYMBOLS
RENR4114-04 September 2005
Schematic Location
2
(Articulation)
Cylinder Gp (2)
Machine Location
101-9346
PARALLEL FLOW
FLOW IN ONE DIRECTION
BIDIRECTIONAL
CROSS FLOW
©2005 Caterpillar All Rights Reserved
FLOW ALLOWED IN EITHER DIRECTION
Printed in U.S.A.
AccuGrade Attachments Part Number
Machine Location
Schematic Location
Manifold Gp - Control (LH)
239-9893
52
I-5
Manifold Gp - Control (RH)
239-9894
53
I-1
Description
39
Inst - Test
Hydraulic Symbols (Electrical)
Implement Supply Lines
6E-3162
Transducer (Fluid)
Tap Locations Pressure, Sampling, and Sensor
Pum pOutp ut Press ure
BB
Implement & Steering Load Sensing Signal Pressure
(Fa n)
C-9
CC
P u mp S u pp l y P r es s u e r
B-8
( I mp l e me n t / S t ee r n i g)
Transducer (Gas / Air)
Generator
Electric Motor
Ripper Attachment
Schematic Location
Description
AA
M
G
D F W
Note A: Only avaliable on 140H and 160H. Note B: Used on ASD(279-300), APM(749-854), and AMZ(314-359). Note C: Used on CCA, ASD, CBK, APM, CCP, and AMZ.
Tap Number
Electrical Symbols Table
Steering Pump Supply
Misc Ref
C-12
Pressure Switch (Adjustable)
Pressure Switch
23
Electrical Wire
Temperature Switch
BB AA
Implement Signal Lines
23
Implement Drain Lines
Steering Cylinder Line for a Right Turn
CC Combination Valve Outlet Port
BB 34
Outlet Port to Steering Cylinders for a Left Turn Steering Cylinder Line for a Left Turn
Implement Supply Lines
Load Sensing Signal Port
Electrical Symbols (Electrical) CC
Implement Supply Lines
T
Pressure Symbol
Temperature Symbol
Hydraulic & Steering System
Wire Number Identification Codes Electrical Schematic Example
Inlet Port from Combination Valve
Hydraulic Schematic Example CurrentStandard
CurrentStandard Harness identification code This example indicates wire 135 in harness "AG".
1
Flow Symbol
Level Symbol
Wire Circuit Number Identification
23
WireColor
325-AG135 PK-14
43
325-PK
ALT.
CircuitIdentification Number
CC Alternate Location for some models.
WireColor
WireGauge
Previous Standard
BB
Wire Color
Wire
325-PK-14 B
34
Combination Valve
Circuit Number Identification
Steering System
Combination Valve
A
Wire Gauge (EXAMPLE VALVE)
4 0 4 1 e 1 g a 4 P 6 1 R N E R
14
13
12
11
10
9
J
VALVE GP CONTROL (SNOW WING LIFT-HEEL)
VALVE GP CONTROL (SNOW WING TILT - TOE)
NOTE A 137-8106
VALVE GP CONTROL (RIPPER) 107-0545
8
7
6
5
CYLINDER GP SCARIFIER 9T-6951
CYLINDERGP RIPPER 113-7754
VALVE GP CONTROL (PLOW/DOZER ANGLE) 115-1007
VALVE GP CONTROL (PLOW/DOZER LIFT) 107-0547
VALVE GP CONTROL (SCARIFIER) 107-0543
NOTE A 137-8104
4
2
1
PLOW / DOZER LIFT
CYLINDERGP (BLADELIFT) 262-1900
CYLINDER GP (BLADELIFT) 262-1900
MANIFOLD GP CONTROL(LH) 239-9893
J MANIFOLD GP CONTROL(RH) 239-9894
A SCARIFIER
RIPPER
3
BLADE LIFT
VALVE GP CONTROL (RIGHTBLADE LIFT) 6E-3031
VALVE GP CONTROL (LEFT BLADE LIFT) 6E-3037
B
PLOW/DOZER ANGLE
A
B
I
I BLADE LIFT
COVER LEFT 101-9346
E D C B A
H
LS
P
T
T1
LS
P
T
T1
SNOW WING TILT (TOE)
SNOW WING LIFT (HEEL)
VALVE GP MTG & (BLADECUSHION SOLENOID) 253-1320 CYLINDER GP (BLADELIFT) 262-1900
G
K J H G F
BLADE LIFT
CYLINDER GP (BLADE TIP) 6E-1549
CYLINDERGP (SIDE SHIFT) 112-5575
CYLINDER GP STEERING (LH) 130-9041
MOTOR GP GEROTOR (CIRCLEDRIVE) 105-3196
ACCUMULATOR GP (BLADE CUSHION) 162-7450
H
COVER RIGHT 101-9346 CYLINDERGP STEERING(RH) 130-9042
ACCUGRADEATTACHMENTS CYLINDER GP ARTICULATION 173-5981 ACCUMULATOR GP (BLADE CUSHION) 162-7450
VALVE GP MTG & (BLADECUSHION SOLENOID) 253-1320
CYLINDER GP (BLADELIFT) 262-1900
G
CYLINDER GP (CENTERSHIFT) 262-1907 CYLINDER GP (WHEELLEAN) 121-9242
SWIVEL GP 260-6502 PUMP GP METERING (STEERING) 222-3769
F BLADE CUSHION ATTACHMENT
E
VALVE GP CONTROL (LEFT BLADE LIFT) 6E-3037
VALVE GP UNIT TEST 4 (LEFT IMPLEMENT CONTROL VALVE MANIFOLD) 6E-3038
VALVE GP CONTROL (SIDESHIFT) 6E-3036
VALVE GP CONTROL (CIRCLEDRIVE) 6E-3035
SIDE SHIFT
BLADE LIFT
MANIFOLD LEFT 102-8385
VALVE GP CONTROL (BLADE TIP) 6E-3034
CIRCLE DRIVE
MANIFOLD RIGHT 102-6238
VALVE GP CONTROL (ARTICULATION) 6E-3028
BLADE TIP
F
BLADE CUSHION ATTACHEMENT
VALVE GP CONTROL (CENTERSHIFT) 6E-3029
VALVE GP CONTROL (WHEEL LEAN) 6E-3030
VALVE GP CONTROL (RIGHTBLADE LIFT) 6E-3031
WHEEL LEAN
CENTER SHIFT
ARTICULATION
VALVE GP UNIT TEST 4 (RIGHTIMPLEMENT CONTROL VALVE MANIFOLD) 6E-3032
E
BLADE LIFT
COVER LEFT 101-9346
E D C B A
D
4 0 - 4 4 r 1 l o o 1 C , 4 e g a R P 6 N 1 E R
K J H G F
TANK GP FILTER & 207-2410
VALVE GP PUMP CONTROL 195-9639
VALVE GP MTG & (FAN SPEED SOLENOID) 191-5292
PRESSURE & FLOW COMPENSATOR VALVE
VALVE GP PUMP CONTROL 104-3122
BB
SIGNAL LINE PRESSURE
VALVE GP CHECK (SECONDARY STEERING) 9T-6146
PRESSURE & FLOW COMPENSATOR VALVE
C
MOTOR GP GEAR (HYDRAULIC FAN) 224-7040
VALVE GP COMBINATION 9T-5957
COVER RIGHT 101-9346
LINE PATTERNS
HYDRAULIC CIRCUIT COLOR DESCRIPTIONS
SIGNAL PURGE VALVE
SIGNAL RESOLVER VALVE
ACCUMULATOR GP STEERING 248-6251
SIGNAL RELIEF VALVE
B
Drain / Return Lines
Hydraulic Fan Pump Output.
H YD RA UL C I F AN P UM P
SECONDARYSTEERING HYDRAULIC PUMP
10
VALVE GP RELIEF (SECONDARY STEERING) 9T-8071
9
8
7
AA
Taps
ArticulationCylinderCircuit.
Components by number
Center Shift Cylinder Circuit. Wheel Lean Cylinder Circuit.
Connections by letter
Plow/Dozer Lift and Tilt Cylinder Circuits.
Note A: Only avaliable on 140H and 160H. Note B: Used on ASD(279-300), APM(749-854), and AMZ(314-359). Note C: Used on CCA, ASD, CBK, APM, CCP, and AMZ.
A THIS SCHEMATIC IS FOR THE 12H, 140H and 160H Motor Grader Part #: 172-9349 CHG06 Components are shown installed on a fully operable machine with the key and engine off and transmission shifter in neutral.
5
B
Blade Lift Cylinder Circuits.
(Pressure, Sampling, Sensor) by letter
PUMP GP ELECTRICDRIVE (SECONDARY STEERING) 123-8867
VALVE GP CHECK (SECONDARY STEERING) 9T-1013
6
1
SENSOR GP PRESSURE (FAN DRIVE) 167-1709
ADAPTER
VALVE GP SHUTTLE Note B 131-0753
Steering (Circle Drive) Control Circuit. Side Shift Cylinder Circuit.
VALVE GP CHECK (FAN DRIVE) 175-0447
SWITCH AS PRESSURE Note C 230-5771
A
11
Signal Line Blade Tip Cylinder Circuit.
YY
STEERING RELIEF VALVE
PUMP GP PISTON (IMPLEMENT& STEERING) 169-4882
Drain / Return Line. Scarifier and Ripper Cylinder Circuits.
CALLOUTS
IMPLEMENT RELIEF VALVE
I MP LE ME NT / S TE ER N I GP UM P
PUMP GP PISTON (HYDRAULIC FAN) 169-4883
Supply Line.
Attachment Air Line
PUMP SUPPLY PRESSURE
12
SecondarySteeringPumpOutput. Steering Metering Pump Output and CylinderCircuit.
Component Group
STEERING PRIORITY VALVE
CC
13
Pilot / Load Sensing Pressure
Snow Wing Lift and Tilt Cylinder Circuits.
PUMP OUTPUT PRESSURE
14
C
Implement & Steering Pump Output.
Pressure Line
AA
D
4
3
2
1
