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CAT 980K and 980K OEM Wheel Loader Hydraulic System

INTERACTIVE SCHEMATIC
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Cover Page
Information
Schematic
Machine Views
Component Table
Tap Table
Fluid Power Symbols
Electrical Symbols
Front Frame
Rear Frame
Tap Views
Features
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Bookmarks
X
EC-C3
EC-C2
E-C60
EC-C1
E-C61
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©
2012 Caterpillar, All Rights Reserved
Printed in U.S.A.
KENR6461-02
September 2012
980K And 980K OEM Wheel Loader
Hydraulic System
980K:
W7K1-UP
GTZ1-UP
980K OEM:
NEP1-UP
Page 1 of 2
COMPONENT LOCATION
1 H-1
2 H-2
3
I-44
I-5
I-5
5
A-9
D-8
6
7
8
A-11
9
I-5
B-12
10
11
I-712
13
15
G-6
B-1014
A-12
H-4
16
F-6
17
F-1
18
G-3
H-6
H-3
21
26
27 H-4,G-2,H-5
28
G-7
22
H-7
23
G-10
24
H-10
25
D-10
H-8
H-9
H-9
G-9
G-7
H-11
29
30
G-8
31
32
33
34
35
36
37
38
H-2
19
H-5
20
G-3
I-5
Description
Part
Number
Machine
Location
Schematic
Location
Accumulator Gp - Pilot 355-9981
Accumulator. Gp -
328-1933
373-1865
Cylinder Gp - Lift 334-9861
Cylinder Gp - Tilt - (Block Handler - Atch)
Cylinder Gp - Tilt - Standard
Cylinder Gp - Tilt - (High Lift - Atch)
Cylinder Gp - Tilt - (12 Ton Loader - Atch)
Cylinder Gp - Tilt - (Logger - Atch)
355-7732
354-7410
361-5042
349-2517
Filter Gp - Pump Case Drain 139-1537
Pump Gp - Implement 274-8016
Breather 312-2684
Tank Gp - Hydraulic Oil
349-1178
Screens Gp - Hydraulic Tank Return
Sensor Gp - Pressure (Lift Cylinder Head End)
344-7391Sensor Gp - Pressure (Pump Discharge)
9T-9227
Valve Gp - Backpressure 349-8844
Valve Gp - Relief (Auxiliary Function) 272-2334
Valve Gp - Make-Up (Lift) 234-4869
Valve Gp - Relief (Margin) 331-9022
Valve Gp - Relief (Ride Control) 4T-7581
Valve Gp - 2 Function w/ Ride Control
3 Function w/ Ride Control (Atch)
321-0036
317-6100
321-0040
Valve Gp - Shuttle 235-6157
Valve Gp - Solenoid (Anti-Drift) 328-4314
Valve Gp - Solenoid (Pressure Reducing) 313-7688
Valve Gp - Dead Engine Lower 112-1817
Cylinder Gp - Steering 319-5051
Pump Gp - Steering 309-6997
296-5270
Pump Gp - Secondary Steering Pump/Motor (Attch) 150-7585
Accumulator - Pilot 355-9981
Valve Gp - Backpressure (Steering) 6E-5278
Sensor Gp - Pressure - Secondary Steering (Atch)
Valve Gp - Solenoid (Pressure Reducing)
Valve Gp - Unloader (Secondary Steering - Atch)
313-7668
337-8990
Valve Gp - Relief - Steering 326-4902
Valve Gp - Check - (Steering Pilot) 6E-4726
Valve Gp - Steering 323-5579
Implement System
Steering System
352-2057
Valve Gp - Relief (Load Sense) 346-0474
Valve Gp - Relief (Tilt) 332-1985
Ride Control
Ride Control (12 Ton Loader)
Page 2 of 2
COMPONENT LOCATION
F-13
F-13
F-14
G-12
F-14
B-14
F-14
A-13
D-13
39
B-13
40
B-13
41
B-13
42
D-4
57
F-10
43
F-12
44
D-3
58
45
E-14
G-12
46
C-4
59
47
48
F-14
49
G-13
50
C-4
60
D-8
51
F-14
52
53
54
55
56
61
62
Cooler - Hydraulic Oil - Standard 349-5934
Accumulator - Brake 283-1136
Cooler - Hydraulic Oil - High Ambience (Atch) 349-5935
Filter Gp - Kidney Loop 295-6259
Motor Gp - Fan 350-7075
Pump Gp - Fan 352-4500
Valve Gp - Charge (Fan Drive and Brake) 331-6013
Valve Gp - Check (Filter Anti-Drainback) 241-3974
Valve Gp - Check (Filter Anti-Drainback) 175-0447
Valve Gp - Cold Start (Atch) 332-1166
Valve Gp - Cooler Bypass 244-1426
Valve Gp - Park Brake 349-4389
Actuator As - Park Brake 154-8042
Cooler - Axle Oil - (Atch) 323-9500
Accumulator Gp - Brake Charge - (CRN Atch) 283-1138
Filter Gp - Magnetic 251-6351
Sensor Gp - Park Brake Pressure
296-5270Sensor Gp - Brake Accumulator Pressure
296-5270
Pump Gp - Tandem - (Axle Oil Cooling) 215-3013
Valve Gp - Output Pressure 210-5587
Valve Gp - Check 130-5202
Valve Gp - Sampling Port 8C-3446
Fan / Brake / Pilot System
Pump Gp - Transmission 352-7957
Pump Gp - Axle Oil Cooler - (Tandem - Atch) 273-1807
Miscellaneous
Axle Oil Cooler
Description
Part
Number
Machine
Location
Schematic
Location
TAP LOCATION
Tap
Number
Description
Schematic
Location
B Front Brake Pressure F-11
C Rear Brake Pressure F-11
D Park Brake Pressure G-12
G1 Fan Pump Pilot Pressure B-13
G2 Fan Pump Load Sense D-12
G3 Implemt/Redundant Steering Pilot Supply D-12
G4 Primary Steering Pilot Supply G-7,G-12
G5 Brake Accumulator E-14
G6 Steering Pump Discharge C-12
G7 Steering Pump Load Sense C-11
G8 Implement Pump Discharge D-8
G9 Implement Pump Load Sense D-8
SOS Fluid Sampling Port F-14
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
CONTROL 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 SHAFTS
UNIDIRECTIONAL BIDIRECTIONAL
PUSH-PULL LEVER PEDALGENERAL MANUAL PUSH BUTTON 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 ACTINGSINGLE 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 Identification 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)
T
LEFT SIDE VIEW
61
59
58
58
57
53
29
25
21
19
17
16
15
14
11
8
8
7
7
6
6
5
5
4
3
VIEW ALL CALLOUTS
RIGHT SIDE VIEW
AXLE COOLER
GAUGE PORTS
STEERING VALVE
SOS
G9
G8
G7
G6
G5
G4
G3
G2
G1
D
C
B
62
60
58
56
55
54
52
51
50
49
48
47
46
45
44
43
42
40
39
38
37
36
35
34
33
32
31
30
28
27
26
24
23
22
20
18
41
13
12
10
9
2
1
VIEW ALL CALLOUTS

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