INTERACTIVE SCHEMATIC
INTERACTIVE SCHEMATIC
The
The Bookm
Bookm arks pane
arks panel will
l will allow you to
allow you to
quickly navigate to points of interest.
quickly navigate to points of interest.
Click on any text th
Click on any text th at is BLUE a
at is BLUE and und
nd und erlined.
erlined.
The
These are hype
se are hyperlin
rlin ks t
ks t hat can be used to n
hat can be used to n avi-
avi-gate the schema
gate the schematic and m
tic and m achine views.
achine views.
When only one callout is showing on a machine view this
When only one callout is showing on a machine view this
button will make all of the callouts visible. This button is
button will make all of the callouts visible. This button is
located in the top
located in the top right
right corner of
corner of eve
every machin
ry machin e view pa
e view page.
ge.
VIEW
VIEW
ALL
ALL
CALLOUTS
CALLOUTS
Cover Page
Cover Page
Information
Information
Schematic
Schematic
Machine Views
Machine Views
Component Table
Component Table
Tap Table
Tap Table
Fluid Power Symbols
Fluid Power Symbols
Electrical Symbols
Electrical Symbols
Front Frame
Front Frame
Rear Frame
Rear Frame
Tap Views
Tap Views
Features
Features
Options
Options
Bookmarks
Bookmarks
X
X
EC-C3
EC-C3
EC-C2
EC-C2
E-C60
E-C60
EC-C1
EC-C1
E-C61
E-C61
T
To set your
o set your screen resolution do
screen resolution do the following:
the following:
RIGHT CLICK
RIGHT CLICK
on the
on the
DESKTOP
DESKTOP
..
Select
Select
PROPERTIES
PROPERTIES
..
CLICK
CLICK
the
the
SETTINGS TAB
SETTINGS TAB
..
MOVE THE SLIDER
MOVE THE SLIDER
under
under
SCREEN RESOLUTION
SCREEN RESOLUTION
until it shows
until it shows
1024 X 768
1024 X 768
..
CLICK OK
CLICK OK
to apply the resolution.
to apply the resolution.
T
This
his docum
docum e
ent
nt is
is best viewe
best viewed at a
d at a
screen resolution of 1024 X 768.
screen resolution of 1024 X 768.
FUNCTION
FUNCTION
Zoom In
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HOTKEYS (Keyboard Shortcuts)
HOTKEYS (Keyboard Shortcuts)
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Hand Tool
Hand Tool
““ CT
CTRL” / “
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KEYS
KEYS
““ CT
CTRL” / “
RL” / “ --””
““ CT
CTRL”
RL” / “
/ “ 0
0”
” (z
(zero
ero))
““ SP
SPACE
ACEBAR”
BAR” (hold down)
(hold down)
F
Hydraulic System
966H and 972H Wheel Loader
966H:
BJ61-UP
BS61-UP
972H:
NPE1-UP
WXZ1-UP
© 2015 Caterpillar, All Rights Reserved
Printed in U.S.A.
UENR1686-02
January 2015
Page 1 of 2
COMPONENT LOCATION
Steering System
Cylinder GP - St eering
369-4182
35
B-5, B-1
Neutralizer - HMU
296-5662
36
B-3
Orifice
108-2144
38
B-3
Pump GP - HMU M etering
349-6093
39
B-3
Pump GP - Secondary Steering Pump/Motor (ATCH)
275-8544
40
C-7
Pump GP - Steering
387-7873
41
D-6
Screen (ATCH)
154-2883
42
B-5
Valve GP - Check (ATCH)
141-2597
43
C-7
Valve GP - Check (CCS ATCH)
111-7775
44
A-6
Valve GP - P ilot (CCS ATCH)
164-4116
45
B-6
Valve GP - Pressure Reducing (ATCH)
114-1267
46
A-5
Valve GP - S huttle (ATCH)
8J-6875
47
A-6
Valve GP - S teering Back up Relief
132-5258
48
B-2, A-5
Valve GP - Steering (CCS ATCH)
133-1728
49
B-5
Valve GP - Steering Crossover Relief
129-8222
50
B-5
Valve GP - Steering HMU
142-3996
51
C-2
Description
Part
Number
Machine
Location
Schematic
Location
Impleme nt System
Acc umulator - Pilot
355-9981
1
F-3
Acc umulator - Ride Control
362-8659
2
F-1
Breather
258-2829
3
C-7
Cylinder GP - Lift (LH)
242-4274
4
F-2
Cylinder GP - Lift (RH)
242-4275
5
F-2
Cylinder GP - Tilt (966 Standard)
356-2219
6
F-3
Cylinder GP - Tilt (972 Standard)
356-2220
7
F-3
Cylinder GP - Tilt (966 High Lift - ATCH)
358-5189
8
F-3
Cylinder GP - Tilt (972 High Lift - ATCH)
358-5190
9
F-3
Cylinder GP - Tilt (966 Logger - ATCH)
356-2220
10
F-3
Filter GP - Case Drain
382-1511
11
C-8
Pump GP - Implement
292-8768
12
D-7
Screen - Return
9T-9227
13
C-7
Tank GP - Hydraulic Oil
368-2756
14
C-7
Valve GP - 2 Funct ion W/O Ride Control
384-3946
15
F-1
Valve GP - 2 Funct ion W/ Ride Control (ATCH)
363-8114
16
F-1
Valve GP - 2 Funct ion W/ Ride Control (ATCH)
370-7350
18
F-1
Valve GP - 3rd Function Aux Implement
366-8542
19
D-1
Valve GP - Dead Engine Lower
112-1817
21
F-4, F-5
Valve GP - Relief (Aux Function)
9T-1573
22
C-1
Valve GP - Relief (Load Sense)
375-3789
23
E-3
Valve GP - Relief (Ride Control)
224-4530
26
E-1
Valve
GP
-
Relief
332-1985
27
F-2
Valve GP - Relief (Logger ATCH)
332-1986
28
F-2
Valve
GP
-
Anti-Drift
328-4314
30
F-2, F-3
Valve GP - Press Limiting (Ride Control)
373-9483
31
E-1
Valve GP - Pressure Reducing
313-7668
32
F-2, E-2,
Page 2 of 2
COMPONENT LOCATION
Valve GP - Diverter (ATCH)
237-8180
66
C-8
Cylinder GP - Quick Coupler (ATCH)
311-1463
67
F-5
Valve GP - Quick Coupler (ATCH)
371-9415
68
E-5
Axle Cooler System
Miscellaneous
Quick Coupler (ATCH)
Pump GP -Transmission
241-8686
69
D-7
Solenoid GP - Pilot Pressure
333-8242
70
F-3
Solenoid GP - Ride Control Activiation
277-8863
71
F-1
Solenoid GP - Ride Control Charge/Balance
251-3268
72
E-1
Valve GP - Neutralizer (CCS ATCH)
321-5283
73
A-6
Valve GP - Back Pressure
349-8844
74
E-3
Valve GP - Check
123-4750
75
E-4
Valve GP - Check
6E-4701
76
E-4
Valve GP - Margin Relief
370-5764
77
E-3
Valve GP - Pressure Reducing
367-8969
78
E-4
Acc umulator - Brake
198-9841
52
E-8
Actuator AS - Parking Brake
154-8042
53
F-6
Cooler - Hydraulic Oil
244-4498
55
D-8
Filter GP - Kidney Loop
378-8331
56
D-8
Motor GP - Fan
161-8919
57
D-8
Motor GP - Fan (ATCH)
334-6234
58
D-8
Pump GP - Fan
254-5147
59
D-8
Valve GP - Charge (Fan Drive and Brake)
352-1587
Valve GP - Charge (Fan Drive and Brake) (Non-CE)
366-9855
Valve GP - Check (Filter Anti-Drainback)
307-5393
61
D-8
Valve GP - Check (Cooler Bypass)
244-1426
62
D-8
Valve GP - Foot Brake
210-5587
63
F-7
Valve GP - Park Brake
106-1774
64
F-6
Valve GP - Sampling Port
8C-3451
65
D-8
60
E-8
Fan / Brake System
Description
Part
Number
Machine
Location
Schematic
Location
TAP LOCATION
Tap
Number
Description
Schematic
Location
B
Front Brake Pressure
F-8
C
Rear Brake Pressure
B-8
D
Park Brake Pressure
F-6
G1
Brake Accumulator Pressure
E-8
G2
Implement Pump Discharge Pressure
E-3
G3
Implement Pump Load Sense Pressure
D-7
G4
Implement Pump Pilot Pressure
F-4
G5
Steering Pump Discharge Pressure
D-7
G6
Steering Pump Load Sense Pressure
B-3, B-4
G7
Fan Pump Discharge Pressure
D-7
G8
Fan Pump Load Sense Pressure
D-8
G9
CCS Steering Neutral Pilot Pressure
A-7
G10
CCS Steering Left Pilot Pressure
B-5
G11
CCS Steering Right Pilot Pressure
B-5
G12
CCS Steering Resolved Pilot Pressure
A-6
G13
Case Drain Air Bleed
D-8
FLUID POWER SYMBOLS
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
CONTRO L VALVES
RESTRICTION
LINE RESTRICTION
(FIXED)
2-SECTION PUMP
MAIN AUX.
SPRING
(ADJUSTABLE)
VARIABILITY
LINE RESTRICTION
(VARIABLE)
LINE RESTRICTION
VARIABLE and PRESSURE
COMPENSATED
PRESSURE
COMPENSATION
PUMP: VARIABLE and
PRESSURE COMPENSATED
ENERGY TRIANGLES
HYDRAULIC
PNEUMATIC
MEASUREMENT
PRESSURE
TEMPERATURE
FLOW
ROTATING SHA FTS
UNIDIRECTIONAL
BIDIRECTIONAL
PUSH-PULL
LEVER
GENERAL
MANUAL
PUSH
BUTTON
PEDAL
SPRING
MANUAL CONTROL SYMBOLS
HYDRAULIC MOTORS
FIXED
DISPLACEMENT
VARIABLE DISPLACEMENT
NON-COMPENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
HYDRAULIC PUMPS
FLUID STORAGE RESERVOIRS
CROSSING AND JOINING LINES
VALVE ENVELOPES
VALVE PORTS
BASIC COMPONENT SYMBOLS
FLUID CONDITIONER
PUMP or MOTOR
FIXED
DISPLACEMENT
VARIABLE DISPLACEMENT
NON-COMPENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
VALVES
PILOT CONTROL SYMBOLS
RELEASED PRESSURE
EXTERNAL RETURN
INTERNAL RETURN
REMOTE SUPPLY PRESSURE
SIMPLIFIED
COMPLETE
INTERNAL
SUPPLY PRESSURE
ACCUMULATORS
SPRING LOADED
GAS CHARGED
SOLENOID
or MANUAL
SOLENOID
and PILOT
SOLENOID and
PILOT or MANUAL
COMBINATION CONTROLS
SOLENOID
SERVO
THERMAL
DETENT
HYDRAULIC AND PNEUMATIC CYLINDERS
DOUBLE ACTING
SINGLE ACTING
BASIC
SYMBOL
SPRING
LOADED
CHECK VALVES
TWO
POSITION
INFINITE
POSITIONING
FLOW IN ONE
DIRECTION
FLOW ALLOWED IN
EITHER DIRECTION
THREE
POSITION
CROSS
FLOW
PARALLEL
FLOW
INTERNAL PASSAGEWAYS
NORMAL POSITION
A B
P T
A B
P T
SHIFTED POSITION
INFINITE POSITION
CONTROL VALVES
ATTACHMENT
MANUAL SHUTOFF
SHUTTLE
PILOT
CONTROLLED
ELECTRICAL SYMBOLS
Hydraulic Symbols (Electrical)
325-AG135 PK-14
Circuit Identification
Number
Wire Color
Wire Gauge
Harness identification code
This example indicates
wire 135 in harness "AG".
325-PK-14
Wire Gauge
Wire Color
Circuit Number
Identification
Wire Number Identifi cation Codes
Current Standard
Previous Standard
Electrical Schematic Example
Hydraulic Schematic Example
325-PK
Wire Color
Circuit Number
Identification
B
A
Wire
Wire
(EXAMPLE VALVE)
Current Standard
Transducer
(Fluid)
Transducer
(Gas / Air)
G
Generator
Electrical Wire
Pressure Switch
M
Electric Motor
Pressure Switch
(Adjustable)
Temperature Switch
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Flow
Symbol
Electrical Symbols (Electrical)
Components areshowninstalledona fully operablemachinewiththekey and engineoff, transmissionshifter inneutralandwithparkingbrakeset.
RefertotheappropriateServiceManualforTroubleshooting, Specifications andSystems Operations. HYDRAULICSCHEMATIC PART NUMBER: 3988003, CHANGE: 01, VERSION: -THIS SCHEMATICIS FORTHE 966HAND972H WHEEL LOADERHYDRAULIC SYSTEM MEDIA NUMBER: UENR1686-02
RefertotheParts Manualusinga specific serialnumberprefix inSIS beforeorderingparts fromthis schematic. BRAKE SCHEMATICPART NUMBER: 2374335, CHANGE: 01, VERSION:
-1 2 3 4 5 6 7 8 A B C D E F 1 2 3 4 5 6 7 8 A B C D E F
HYDRAULICCI RCUIT COLORDESCRI PTIONS IMPLEMENT PILOT SUPPLY OIL
BRAKE COOLING CIRCUIT IMPLEMENT PUMP OUTPUT TRANSMISSIONPUMP PRIMARY STEERING PUMP CIRCUIT IMPLEMENT PUMP LOADSENSE CIRCUIT STEERING CIRCUIT FANPUMP CIRCUIT SUPPLY LINE QUICK COUPLERCIRCUIT BRAKE CONTROLCIRCUIT DRAIN/ RETURNLINE TILT CYLINDERCIRCUIT LIFT CYLINDERCIRCUIT SECONDARY STEERING CIRCUIT ELECTRICALCIRCUITS LINE PATTERNS Drain/ ReturnLines Component Group Pilot / LoadSensingPressure PressureLine CALLOUTS Taps(Pressure, Sampling, Sensor-by letter)
YY (52)VALVE GP-CONTROL 138-1234 Callout Number (MachineLocationfrom Component LocationsTable) Component Name Part Number AirLine SOL ENOI DL OCAT ION S OLE NOI DNAME
E1 FAN/ BRAKE VALVE DEMANDFANSPEEDSOLENOID E2 IMPLEMENTVALVE IMPLEMENTPILOTSUPPORTSOLENOID E 3 I MP LE ME NT VA LV E - TI LT R AC K S OL EN OI D E 4 I MP LE ME NT VA LV E - TI LT D UM P S OL EN OI D E 5 I MP LE ME NT VA LV E - LI FT R AI SE SO LE NO ID E 6 I MP LE ME NT V AL VE - L IF T L OW ER / F LO AT S OL EN OI D E7 IMPLEMENTVALVE -RIDE CONTROL RIDE CONTROLACTIVATIONSOLENOID E8 IMPLEMENTVALVE -RIDE CONTROL RIDE CONTROLCHARGE / BALANCE SOLENOID E9 3RDFUNCTIONAUXILIARYVALVE 3RDFUNCTIONPORTA SOLENOID E10 3RDFUNCTIONAUXILIARYVALVE 3RDFUNCTIONPORTB SOLENOID E11 QUICK COUPLERVALVE DISENGAGE SOLENOID
SOLENOID VALVEREFERENCE COMMANDCONTROLSTEERING (ATTACHMENT) HMUSTEERING (STANDARDCONFIGURATION) G13 G8 G7 G3 G5 SOS G9 G12 G10 G11 D G2 G4 G6 G6 (5)CYLINDERGPLIFT(RH) (2)ACCUMUL ATOR RIDE CONTROL IMPLEMENTVALVE GP (15)2FUNCTIONW/O RIDE CONTROL (16)2FUNCTIONW/ RIDE CONTROL(ATCH) (18)2FUNCTIONW/ RIDE CONTROL(ATCH)
(26)VALVE GP RELIEF (RIDE CONT) (31)VALVE GP
PRESS LIMITING (RIDE CONT) (72)SOLENOIDGP RIDE CONTROL CHARGE/BALANCE (71)SOLENOIDGP RIDE CONTROL ACTIVIATION TILTCYLINDER (6)966STANDARD (7)972STANDARD (8)966HIGHLIFT(ATCH) (9)972HIGHLIFT(ATCH) (10)966LOGGER(ATCH) (4)CYLINDERGP LIFT(LH) (27)VALVE GPRELIEF (28)VALVE GPRELIEF (32)VALVE GP PRESSURE REDUCING (LOGGER ATCH) (STANDARD) (1)ACCUMULATORPILOT (30)VALVE GP ANTI DRIFT (30)VALVE GP ANTI DRIFT (70)SOLENOIDGP PILOTPRESSURE (67)CYLINDERGP QUICK COUPLER(ATCH) (21)VALVE GP DEADENGINE LOWER (23)VALVE GPRELIEF (LOADSENSE) (78)VALVE GP PRESSURE REDUCING (76)VALVE GP CHECK (74)VALVE GP BACK PRESSURE (75)VALVE GP CHECK (21)VALVE GP DEADENGINE LOWER (32)VALVE GP PRESSURE REDUCING (77)VALVE GP MARGINRELIEF (19)VALVE GP3RDFUNCTION AUX IMPLEMENT (22)VALVE GPRELIEF (AUX FUNCTION) (32)VALVE GP SOLENOID PRESSURE REDUCING (44)VALVE GPCHECK (CSS ATCH) (42)SCREEN(ATCH) (50)VALVE GPSTEERING CROSSOVERRELIEF (46)VALVE GP PRESSURE
REDUCING (ATCH) (48)VALVE GPRELIEFSTEERING BACKUP (49)VALVE GPSTEERING (CCS ATCH) (35)CYLINDERGP STEERING (47)VALVE GP SHUTTLE (ATCH) (45)VALVE GP PILOT(CSS ATCH) (11)FILTERGP CASE DRAIN (3)BREATHER (14)TANK GP HYDRAULICOIL (13)SCREEN RETURN (66)VALVE GP DIVERTER(ATCH) (41)PUMPGP STEERING
(43)VALVE GP CHECK (ATCH) (40)PUMPGP SECONDARYSTEERING PUMP/MOTOR(AT CH) (56)FILTERGP KIDNEYLOOP (61)VALVE GP CHECK (FILTER ANTI-DRAINBACK) (55)COOLER HYDRAULICOIL (59)PUMPGPFAN (62)VALVE GPCHECK (COOLER BYPASS) (65)VALVE GP SAMPLING PORT (57)MOTORGP FAN (58)MOTORGP FAN (ATCH) (60)VALVE GP CHARGE (12)VALVE GP IMPLEMENT (69)PUMPGP TARNSMISSION (63)VALVE GP FOOTBRAKE (64)VALVE GP PARK BRAKE
(53)ACTUATORAS PARK BRAKE
(68)VALVE GP QUICK COUPLER(ATCH) (52)ACC BRAKE (35)CYLINDERGP STEERING (50)VALVE GP STEERING CROSSOVERRELIEF (48)VALVE GPSTEERING BACKUPRELIEF (51)VALVE GP STEERING (HMU) (39)PUMPGP HMUMETERING (38)ORIFICE (36)NEUTRALIZERHMU (73)VALVE GP NEUTRALIZER (CCS ATCH) (FANDRIVE ANDBRAKE) REARAXLE PORT B LEVERFORWARD, LEFT HANDLINE ONBOOM (WHENVIEWEDFROMCAB) PORT A LEVERREARWARD,
RIGHT HANDLINE ONBOOM (WHENVIEWEDFROMCAB) E9 PORT A PORT A HOLD PORT B PORT B E10 ACC PS (AUX) E2 E3 E5 RACK RAISE BACK PS E7 ACC T RACK RAISE BACK HOLD HOLD P DUMP LOWER FLOAT E8 LS LOWER/FLOAT DUMP E4 E6 RCMANIFOLD LS1 DR1 P (AUX) E11 HMU PA PB T B A P L R P T LS LS P T PS A1 A2 E1 F IMPLEMENTPUMPDISCHARGE IMPLEMENTLOADSENSE SIGNAL IMPLEMENTLOADSENSE RELIEF/PILOTRETURN QUICK COUPLERSUPPLY IMPLEMENTRETURN AXLE OILCOOLERRETURN AXLE OILCOOLERSUPPLY B S L X M LS PT T P LS PA PB B A PRIMARYPILOTSUPPLY-CCS STEERING ATTACHMENT
FRONTAXLE T P P LS LS P T T NC NO C C TO TRANSMISSION CONTROL TO BRAKE LIGHTS APPLY RELEASE AXLE RESERVIOR RESERVIOR AXLE TRANSMISSION CONTROL C NO NC LS G1 B C C NO NC 241-8692 237-8180 9T-9227 368-2756 258-2829 378-8331 8C-3451 307-5393 244-4498 244-1426 254-5147 352-1587 161-8919 334-6234 198-9841 210-5587 106-1774 292-8768 241-8692 275-8544 141-2597 387-7873 154-8042 164-4116 8J-6875 111-7775 154-2883 129-8222 369-4182 133-1728 114-1267 132-5258 296-5662 108-2144 349-6093 132-5258 142-3996 129-8222 369-4182 313-7668 375-3789 313-7668 332-1985 332-1986 356-2219 356-2220 358-5189 358-5190 356-2220 242-4274 242-4275 384-3946 368-8114 370-7350 355-9981 224-4530 373-9483 367-8969 6E-4701 349-8844 123-4750 370-5764 112-1817 362-8659 366-8542 9T-1573 313-7668 112-1817 311-1463 371-9415 328-4314 328-4314 333-8242 277-8863 251-3268 321-5283 (FANDRIVE ANDBRAKE NONE-CE)366-9855