17
7
23 26
27 14 3 4 35
21 30
3
4
47 22 48
KENR7618-05 November 2011
29 36
15
6
37 38
33
32
FLUID POWER SYMBOLS BASICCOMPONENTSYMBOLS
12 13
11
MAIN
HH
GG
PUMPORMOTOR
FLUIDCONDITIO NER
SPR ING
CON TRO L V AV LES
V A R AI BI L I T Y
SPRING (ADJUSTABLE)
LN I ER E S T RC I T I O N (VARIABLE)
PRESSURE COMPENSATION
LIN ERES T RI C ITO N (FIXED)
HYDRAULIC PNEUMATIC ENERGYTRIANGLES
T W OP O S I TOI N
PUMP (VARIABLE&PRESSURE COMPENSATED)
LINERESTRICTION ATTACHMEN T (VARIABLE&PRESSURE COMPENSATED)
VALVE PORTS
T HR E E P O STI I O N
TWO -WAY
TH R E E- W AY
CONTROLVALVES AB
AUX
PUMP (2-SECTION)
VALVES
VALVE ENVELOPES
ONEP O STI I O N
RES T RI C ITO N
FO U R -WAY
CHECKVALVES
AB
P T
P T
NORMALPOSITION
SHIF TEDPOS ITIO N
BASIC SYMBOL
I N FN I ITEPO S I TO IN
SPRING LOADED
S H UT L T E
P LIO T CONTROLLED
FLUIDSTORAGERESERVOIRS
V E N T E D
924H and 924HZ Wheel Loader Hydraulic System 18
8
19
20
24
17
5 43 39 40
49
1
14
31
10
9
23 26
5 43
29 36 37
32
30
44 4 5 50 22
38 49
6
13 9
12
11
R E T U R NA BO V E FL U I DL E V EL
R E T U R NB E L OW FL U I DL E V EL
ROTATING SHAFTS
TE M P E RAT U RE
FL O W
UN I DI RE CT O I NA L
BD IR I EC T I ON AL
COMBINATIONCONTROLS
RCB1-UP WLB1-UP HXC1-UP PED1-UP JRL1-UP JTM1-UP KLN1-UP RRS1-UP JZZ1-UP
41 44 45
50
7 34 27 35
1
P R E S S UR ZI E D
MEASUREMENT
PR E S S UR E
SOLENOID
SOLENOID OR MANUAL
SOLENOID &PILOT
SOLENOID& PILOTORMANUAL
SERVO
THERMAL
DETENT
MANUALCONTROLSYMBOLS
PUSH - PULL LEVER
MANUALSHUTOFF
GENERAL M ANUAL
E XT ER NA L R E TU RN
IN T ER NA L R E TU R N
ACCUMULATORS
16
SPR I N GL O A DED
TILT CONTROL
SIMPLIFIED
GASC HAR GED
LIN ESCR OSS ING
FIXED DISPLACEMENT
COMPLETE
INTERNAL SUPPLYPRESSURE
LIN ESJO I NNI G
SINGLEACTING
DOUBLEACTING
INTERNALPASSAGEWAYS
VARIABLEDISPLACEMENT NON-COMPENSATED
INFINITE POSITIONING
3POSITION
2POSITION
UNIDIRECTIONAL
BIDIRECTIONAL
© 2011 Caterpillar, AllRightsReserved
SPRING
HYDRAULIC&PNEUMATICCYLINDERS
HYDRAULICMOTORS
VARIABLEDISPLACEMEN T NON-COMPENSATED
UNIDIRECTIONAL
Volume 1 of 2: 924H and 924HZ Wheel Loader
PEDAL
REMOTESUPPLYPRESSURE
CROSSING&JOININGLINES
HYDRAULICPUMPS FIXED DISPLACEMENT
PUSH BUTTON
PILOTCONTROLSYMBOLS
RELEASEDPRESSURE
FLOWINONE DIRECTION
BIDIRECTIONAL
PARALLEL FLOW
CROSS FLOW
FLOW IN EITHER DIRECTION
Printed in U.S.A.
ELECTRICAL SYMBOLS TABLE
2
HYDRAULICSYMBOLS(ELECTRICAL)
46
G
18
8
19
20
21
24
47
3
4
39 40
48
10
M
TRANSDUCER (FLUID)
TRANSDUCER (GAS/ AIR)
GENERATOR
ELECTRICMOTOR
PRESSURE SWITCH
PRESSURESWITCH (ADJUSTABLE)
TEMPERATURE SWITCH
ELECTRICAL WIRE
15
41
31 33
COMPONENT LOCATIONS ELECTRICALSYMBOLS(ELECTRICAL)
ComponentLocations NAME A ccumulator Gp - Br ake
PARTNO. 924H
PARTNO. 924HZ
Machine Location
Schematic Location
362- 9032
362-9032
1
C- 7, C- 8
NAME
Str ainer
PARTNO. 924H
PARTNO. 924HZ
Machine Location
Schematic Location
262-5689
262-5689
26
A-7
3E-7690
3E-7690
27
B-8
28
B-5
29
D-6
243- 4398
243- 4398
2
B- 5
SwitchAs -Axle CoolerPress.
AccumulatorGp- RideControl
283-44 18
283-4418
3
E- 6
Switch As - Ride Contr Disable
126- 6916
Accum ulator Gp - Ride Contr ol
298-2412
298- 2412
4
E-6
Switch As - Sec. Steer ing
230- 5771
5
A- 3 to A- 5
T ank Gp- Hydr aulic Oil
D-4
Valve As - F oot Br ake
144-8521
B- 8
Valve Gp - Ball, Dead Eng. Lwr
112-1817
Accum ulator Gp - P ilot
Connector - Or if ice
8C-0564
Connector - Or if ice
8C- 0564
3E- 2335
3E- 2335
6
Cooler-Hydraulic OilC ooler
293- 2240
293-2240
Cooler As - Dual Disc Brakes
205-3652
205-3652
7
Cylinder Gp - Lif t
141- 7483
152-4187
9
Cylinder Gp - Steer ing
142- 6251
142-6251
10
Cylinder Gp - T ilt
268- 9437
152- 5306
11
8
B- 8 E -4
V al ve G pp- C he ck , Co ol er B yp as s
F-8
ValveGp-Check,ClrBypass,W/AxleOilClr
1 45 8 - 98 3
34
B- 8
2 59 -0 55 8
37
363- 7916
38
E-7
209-0270
39
B- 3 to B- 5
V alve Gp - Implmnt 3 S ec. W / Regen
209- 0271
40
B- 3 to B- 5
Valve Gp - Implmnt 4 Sec. W/ Regen
209-0272
354-2953
15
E-8 D-6
Motor Gp -A -Axle Oil Cooler
288-4166
288-4166
17
B -8
Valve Gp - Load Sense Resolver
8J-6875
Motor Gp -R -Radiator Hydr. Fan
289-6393
289-6393
18
A-7
Valve Gp - P ilot, Joystick
212- 1302
A- 7
Valve Gp - Pilot, Joystick / 2 Aux.
212-1307
Valve Gp - P ilot, Joystick / Au Aux.
212-1305
Motor Gp - Rever sing Fan
289- 6394
289-6394
19
Pump Gp - Br ake and F an
288- 4162
288-4162
20
B -7
293-2470
21
D-8
185-5209
46
B- 5
251-0907
47
E- 8
280- 9978
48
E- 5
24
B- 7
V alve Gp - Shutof f , Hydr . Dr ain
C-8
V al ve G pp- S ol , Pl t Sh -t Of /f D fi .f L ck
299-5499
25
6V- 7238
6V -7238
2 33 7 - 13 3
2 33 7 - 13 3
49 50
MAIN CONTROL
DD
EE WIRE
CIRCUITNUMBER IDENTIFICATION
38
B-6 B-6,D-5
25 Tap Locations Pressure, Sampling, and Sensor
AA
Description
Schematic Location
ImplementPumpLoadSense Pressure
C-6
BB
S et er ni g Pu Pum pL pL oa dS dS ens eP eP e r s sur e
C7 -
CC
Implement Pump Pressure
C-5
DD
Steering Pump Pressure
B -6
EE
P ilot Supply Pressure
FF
F ront Brake Pressure
C-8
GG
T lit Cylinder Rod End Pressure
D-4
HH II JJ S OS
BB
FF
B -6
T lit Cylinder Rod Head Pressure
D-5
R ear Ax Axl eC eC ool er Ci Ci cr ui tP tP e r s sur e
B8 -
Coupler Cylinder Pressure
E -6
H ydr au il cO cO li S am pl n i g Po Po tr (S (S OS )
A 8-
JJ
STEERING SIGNAL
WIRECOLOR
FRONT BRAKE VALVE
WIREGAUGE
325-PK
COUPLER CONTROL
WIRECOLOR
B
325-PK-14
42
Tap Number
WIRE COLOR
PREVIOUSSTANDARD
PILOT CONTROL
A-3 to AA-5
280- 9978
A- 7
CIRCUITNUMBER IDENTIFICATION
325-AG135 PK-14
CIRCUITNUMBER IDENTIFICATION
A- 3 to A- 5
185- 5209
C-7
23
2 90 5- 82 5
A- 3 to A- 5
251- 0907
22
255-0759
299- 5499
C-5
43 44 45
28 AA
B- 3 to B- 5
42
Valve Gp - Pr essur e Reducing
163-2428
255-0759 29 0-5 82 5
212-1305
CC
D- 5
Valve Gp - Relief
163-2428
Scr een S en so rG rG pp- Xm Xms sm N eu rta il ze r
41 212-1302
CURRENT STANDARD
WIRE
D-6
V alve Gp - Ride Contr ol
P um p Gp - Steer ing / Im plement Scr een As
36
H YD RA UL IC S CH EM AT IC E XA MP LE
CURRENT STANDARD HARNESSIDENTIFICATIONCODE THISEXAMPLE INDICATESWIRE135 INHARNESS“AG”
B- 8
173- 4032
354- 2953
293-2470
35
212-7521
Valve Gp - Implmnt 2 Sec. W/ Regen
Hand Meter ing Unit
Pump Gp -S -Spplmnt. Steering
2 59 -0 55 8 212-7521
FLOW SWITCH
E LE CT RI CA L SC HE MA TI C EX AM PL E
C- 8 E -8
1 45 8 - 98 3
Valve Gp - Coupler Contr ol
A- 8
LEVEL SWITCH
WIRENUMBERIDENTIFICATIONCODES
A-6
V alve Gp -C -Check, BackP ress.
14
TEMPERATURE SWITCH
D-5
33
V alve Gp - Com bination, Rlf / Dvtr
209-3149
16
30 31 32
9T -1013
F-7
13
209- 3149
209-0789
262- 5654 144-8521 112-1817
9T -1013
F-7
190-3085 188- 0982
F ilter Gp
209- 0789
262-5654
D-4
CylinderGp- Coupler , Standar d Cylinder Gp - Coupler , W ide
Manif old
12
V alve Gp - Check
230-5771
T
PRESSURE SWITCH
WIREGAUGE
A
(EXAMPLEVALVE)
2 f ) o s e c 1 h n i 8 2 L x s e O h V i 9 c n 5 3 s : n 0 - i o 8 s e n m 1 i ( 6 D , 7 e g a P R 0 3 N E K
8
7
6
5
4
3
2
1
142-6251 924H:190-3085
924H: 188-0982
F
F
280-9978
363-7916 283-4418
S1
P
R
PT10
H
JJ E
T
LS
E
P
T S
924H: 141-7483 924HZ: 152-4187 354-2953
298-2412
212-7521 3E-2335 112-1817 9T-1013 N1
251-0907
209-0789
GG
924H: 173-4032
D
D
PT7
S 5
233-7133
FROMCONTROLLER
TO FRONTAXLE DIFFERENTIALLOCK
2 f ) o s e c 1 h n i 2 L 8 x s e O h V i 9 c n 5 3 s : n 0 - i o s 8 n e m i 1 D 6 ( e , 7 a g P R 0 3 N E K
924H: 268-9437 924HZ:152-5306
293-2470
M
230-5771 P T 3
CC
163-2428
PT2
362-9032 TOREARBRAKES
FF
TOFOURTH FUNCTION
TOTHIRD FUNCTION
AA
C
Highlights component used only in the 924H
HH
144-8521
290-5825
Note:
PT8
MP
P T 1
P
BB C
924H: 209-0270 PT6
TOFRONTBRAKES
8J-6875 924H:209-0271
LS
3E-7690 6V-7238
299-5499
205-3652
924H:209-0272
REARAXLE
185-5209 SW
II
PT9
T
DD
B 259-0558
PT4
HYDRAULICCIRCUITCOLORDESCRIPTIONS IMPLEMENTPILOTOUTPUT STEERINGPUMPOUTPUT STEERINGSECONDARYPUMPANDCIRCUIT FOURTHJUNCTIONCONTROLCIRCUIT STEERINGCONTROLCIRCUIT FANCIRCUIT SUPPLYLINE BRAKECONTROLCIRCUIT THIRDFUNCTIONCONTROLCIRCUIT LIFTCYLINDERANDCONTROLCIRCUIT DRAIN/ RETURNLINE COUPLERCONTROLCIRCUIT IMPLEMENTPUMPOUTPUT(NONSTEERING) TILTCYLINDERANDCONTROLCIRCUIT ELECTRICALWIRESTOCONTROL DRAIN/ BRAKECOOLING (LRG OFF-HWYTRKS)
288-4166 PT5
EE
328-2973
243-4398
8C-0564
8C-0564
S4
8C-0564
8C-0564
B
ELECTRICALCIRCUITS
LINEPATTERNS
212-1302
288-4162
Pressure Line Pilot / Load Sensing Pressure Drain / Return Lines
WIREDTO CONTROLLER
145-8983
212-1305
262-5689
ComponentGroup
CALLOUTS
A
Taps (Pressure,Sampling,Sensor-byletter)
YY
233-7133
DUMP
RACKBACK
LOWER/ FLOAT
RAISE
BACK
FORWARD
924H:212-1307
289-6394 262-5654
209-3149 293-2240
SOS 8
PT11
289-6393
7
Callout Number (MachineLocationfrom ComponentLocationsTable )
(52) VALVEGP- CONTROL 138-1234 PartNumber
THISSCHEMATICISFORTHE924HAND 924HZWHEEL LOADER HYDRAULICSYSTEM VOLUME1 of 2: 924HAND 924HZ WHEEL LOADER MEDIANUMBER: KENR7618-05 SCHEMATICPART NUMBER: 289-8914, CHANGE: 06, VERSION: Components are shown installed on a fully operable machine with the key and engine off, transmission shifter in neutraland with parking brake set. Refer to the appropriate Service Manualfor Troubleshooting, Specif ications and Systems Operations.
255-0759
6
5
4
3
2
1
Component Name
A
KENR7618-05 November 2011
FLUID POWER SYMBOLS BASICCOMPONENTSYMBOLS MAIN
PUMPORMOTOR
FLUIDCONDITIO NER
SPR ING
CON TRO L V AV LES
V A R AI BI L I T Y
SPRING (ADJUSTABLE)
LN I ER E S T RC I T I O N (VARIABLE)
RES T RI C ITO N
PRESSURE COMPENSATION
LIN ERES T RI C ITO N (FIXED)
HYDRAULIC PNEUMATIC ENERGYTRIANGLES
PUMP (VARIABLE&PRESSURE COMPENSATED)
LINERESTRICTION ATTACHMEN T (VARIABLE&PRESSURE COMPENSATED)
VALVES
VALVE ENVELOPES
AUX
PUMP (2-SECTION)
VALVE PORTS
ComponentLocation
Description Cylinder Gp - Coupler
Part Machine Schematic Number Location Location 353-9364
1
ONEP O STI I O N
T W OP O S I TOI N
Pump Gp - Hand M etering Unit
354-2968
2
E-7
Val ve Gp - Dual Mode St er ni gC o nt or l
2 4 7- 4 503
3
E- 8
Va l ve Gp - In e t g r at ed Th ri dF un ctoi nC on rt ol
2 62 9- 7 06
4
D2 -
T HR E E P O STI I O N
TWO -WAY
TH R E E- W AY
CONTROLVALVES
E-6 AB
FO U R -WAY
CHECKVALVES
AB
P T
P T
NORMALPOSITION
SHIF TEDPOS ITIO N
BASIC SYMBOL
I N FN I ITEPO S I TO IN
SPRING LOADED
S H UT L T E
P LO I T CONTROLLED
FLUIDSTORAGERESERVOIRS
V E N T E D
924H and 924HZ Wheel Loader Hydraulic System
1
Tap Number JJ
Description Fusion C oupler Pressure
Schematic Location D-5
R E T U R NA BO V E FL U I DL E V EL
SOLENOID
FL O W
SOLENOID OR MANUAL
UN I DI RE CT O I NA L
SOLENOID &PILOT
BD IR I EC T I ON AL
SOLENOID& PILOTORMANUAL
SERVO
THERMAL
DETENT
MANUALCONTROLSYMBOLS
PUSH - PULL LEVER
MANUALSHUTOFF
GENERAL M ANUAL
IN T ER NA L R E TU R N
ACCUMULATORS
SPR I N GL O A DED
© 2011 Caterpillar, AllRightsReserved
SIMPLIFIED
GASC HAR GED
LIN ESCR OSS ING
FIXED DISPLACEMENT
SPRING
COMPLETE
INTERNAL SUPPLYPRESSURE
HYDRAULIC&PNEUMATICCYLINDERS
LIN ESJO I NNI G
SINGLEACTING
HYDRAULICMOTORS
VARIABLEDISPLACEMEN T NON-COMPENSATED
UNIDIRECTIONAL
Volume 2 of 2: Fusion Coupler, Integrated Third Function and SecondarySteering
PEDAL
REMOTESUPPLYPRESSURE
CROSSING&JOININGLINES
HYDRAULICPUMPS FIXED DISPLACEMENT
PUSH BUTTON
PILOTCONTROLSYMBOLS
RELEASEDPRESSURE
E XT ER NA L R E TU RN
COUPLER CYLINDERS
R E T U R NB E L OW FL U I DL E V EL
ROTATING SHAFTS
TE M P E RAT U RE
COMBINATIONCONTROLS
RCB1-UP WLB1-UP HXC1-UP PED1-UP JRL1-UP JTM1-UP KLN1-UP RRS1-UP JZZ1-UP
Tap Location Pressure and Sampling
P R E S S UR ZI E D
MEASUREMENT
PR E S S UR E
DOUBLEACTING
INTERNALPASSAGEWAYS
VARIABLEDISPLACEMENT NON-COMPENSATED
INFINITE POSITIONING
3POSITION
2POSITION
UNIDIRECTIONAL
BIDIRECTIONAL
FLOWINONE DIRECTION
BIDIRECTIONAL
PARALLEL FLOW
CROSS FLOW
FLOW IN EITHER DIRECTION
Printed in U.S.A.
ELECTRICAL SYMBOLS TABLE HYDRAULICSYMBOLS(ELECTRICAL)
G
4
M
TRANSDUCER (FLUID)
TRANSDUCER (GAS/ AIR)
GENERATOR
ELECTRICMOTOR
PRESSURE SWITCH
PRESSURESWITCH (ADJUSTABLE)
TEMPERATURE SWITCH
ELECTRICAL WIRE
ELECTRICALSYMBOLS(ELECTRICAL)
T
PRESSURE SWITCH
TEMPERATURE SWITCH
LEVEL SWITCH
FLOW SWITCH
WIRENUMBERIDENTIFICATIONCODES E LE CT RI CA L SC HE MA TI C EX AM PL E
H YD RA UL IC S CH EM AT IC E XA MP LE
CURRENT STANDARD
CURRENT STANDARD
HARNESSIDENTIFICATIONCODE THISEXAMPLE INDICATESWIRE135 INHARNESS“AG” WIRE CIRCUITNUMBER IDENTIFICATION
325-AG135 PK-14
2
3
JJ
CIRCUITNUMBER IDENTIFICATION
WIRE COLOR
WIRE
INTEGRATED THIRD FUNCTION CONTROL
325-PK
PREVIOUSSTANDARD
FUSION COUPLER VALVE SECONDARY STEERING
WIRECOLOR
WIREGAUGE
WIRECOLOR
B
325-PK-14
CIRCUITNUMBER IDENTIFICATION
WIREGAUGE
A
(EXAMPLEVALVE)
2 f ) o s e c 2 h n i 8 2 L x s e O h V i 9 c n 5 3 : s n 0 - i o 8 s e n m 1 i ( 6 D , 7 e g a P R 0 3 N E K
8
7
6
5
4
3
2
1
F
F TO MANIFOLD VOLUME 1, D-6
TO THIRD FUNCTION
TO FOURTH FUNCTION
TO IMPLEMENT SUPPLY VOLUME 1, C-7
QUICK STEER CIRCUIT WITH SECONDARYSTEERING
FUSION COUPLER 353-9364 TO LOAD SENSE RESOLVER VOLUME 1, C-5
E
354-2968
E
354-2968
TOMANIFOLD VOLUME 1, D-6
TO LOAD SENSE RESOLVER VOLUME 1, C-5
TOMANIFOLD VOLUME 1, D-6
JJ
TOIMPLEMENTSUPPLY VOLUME 1, C-7
D
354-2968
D
TO STEERING PUMPLOAD SENSE VOLUME 1, C-7 TO MANIFOLD VOLUME 1, D-6
2 f ) o s e c 2 h n i 2 L 8 x s e O h V i 9 c n 5 3 s : n 0 - i o s 8 n e m i 1 D 6 ( e , 7 a g P R 0 3 N E K
PILOTSUPPLY (FROM SHUT-OFF VALVE) VOLUME 1, C-6
PILOTSUPPLY (FROM SHUT-OFF VALVE) VOLUME 1, C-6
C
C
WIREDTOCONTROLLER
DUMP
RACKBACK
LOWER / FLOAT
RAISE
FORWARD
BACK
INTEGRATED THIRD FUNCTION B
HYDRAULICCIRCUIT COLORDESCRIPTIONS
B
IMPLEMENTPUMPOUTPUT STEERINGPUMPOUTPUT STEERINGSECONDARYPUMPANDCIRCUIT FOURTHJUNCTIONCONTROL CIRCUIT STEERINGCIRCUIT SUPPLYLINE THIRDFUNCTIONCONTROL CIRCUIT LIFT CYLINDERANDCONTROL CIRCUIT DRAIN/ RETURNLINE COUPLERCONTROLCIRCUIT IIMPLEMENTPUMPOUTPUT (NON-STEERING ) TILT CYLINDERANDCONTROL CIRCUIT DIFFERENTIALLOCKCONTROLCIRCUIT ELECTRICLINES ELECTRICALCIRCUITS
LINEPATTERNS Pressure Line Pilot / Load Sensing Pressure Drain / Return Lines ComponentGroup
CALLOUTS
A
Note:
Highlights component used only in the 924H
Taps (Pressure,Sampling,Sensor-byletter)
YY
Callout Number (MachineLocationfrom Component LocationsTable)
(52) VALVEGP- CONTROL 138-1234 PartNumber
Component Name
THISSCHEMATICISFORTHE924H AND924HZ WHEELLOADERHYDRAULIC SYSTEM VOLUME2 of 2: FUSIONCOUPLER, INTEGRATEDTHIRD FUNCTION, AND SECONDARYSTEERING MEDIANUMBER: KENR7618-05 SCHEMATICPART NUMBER: 289-8914, CHANGE: 06, VERSION: Components are shown installed on a fully operable machine with the key and engine off, transmission shifter in neutraland with parking brake set. Refer to the appropriate Service Manualfor Troubleshooting, Speci fications and Systems Operations.
8
7
6
5
4
3
2
1
A
