diagrama hidraulico m 325

1. RENR8087
30Page,(Dimensions:39inchesx28inches)
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 CONDITIONERPUMP or MOTOR
FLUID POWER SYMBOLS
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
Hydraulic Symbols (Electrical)
Electrical Symbols Table
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 ColorCircuit Number
Identification
B A
Wire
Wire
(EXAMPLE VALVE)
Current Standard
Transducer
(Fluid)
Transducer
(Gas / Air)
G
Generator
Electrical WirePressure Switch
M
Electric Motor
Pressure Switch
(Adjustable)
Temperature Switch
T
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Flow
Symbol
Electrical Symbols (Electrical)
RENR8087
December 2006
M325D Material Handler
Hydraulic System
EDC1-UP
KAE1-UP
EDF1-UP
KGG1-UP
KAY1-UP
©2006 Caterpillar
All Rights Reserved
Printed in U.S.A.
Tap Locations
Pressure, Sampling, and Sensor
Tap
Number
Description
Schematic
Location
AA Grapple Rotate Pressure F-1
BB Grapple Rotate Pressure F-1
CC Hydraulic Cab Riser Up Pressure E-1
DD Hydraulic Cab Riser Down Pressure E-1
EE Medium Pressure D-1
FF Idler Pump Delivery Pressure B-4
GG Drive Pump Delivery Pressure A-4
HH Power Shift Pressure B-3
JJ Brake Pressure B-5
KK Service Brake Accumulator Charge Pressure B-4
LL Service Brake Accumulator Charge Pressure B-5
MM Idler Pump Negative Flow Signal Pressure A-7
NN Drive Pump Negative Flow Signal Pressure A-7
Description
Part
Number
Machine
Location
Schematic
Location
Accumulator - Brake Charge 255-8546 1 B-5
Accumulator - Service Brake Pressure 255-8546 1 B-4
Accumulator As - Hydraulic Cab Riser 255-8547 7 E-2
Accumulator Gp - LH Boom Cylinder 225-3394 3 F-3
Accumulator Gp - OSC Axle Rest 8U-2924 9 E-4
Accumulator Gp - Pilot 8U-6159 12 B-8
Accumulator Gp - RH Boom Cylinder 225-3394 3 F-3
Connector Gp - Orifice (HCR) 257-2980 8 F-2
Cylinder Gp - Bucket NOTE A 14 E-6
Cylinder Gp - Hydraulic Cab Riser 235-8287 8 F-2
Cylinder Gp - LH Boom NOTE A 6 F-3
Cylinder Gp - LHF Stabilizer 237-4165 15 F-6
Cylinder Gp - LHF Steer 234-4115 21 E-4
Cylinder Gp - LHR OSC Lock 236-5773 11 F-4
Cylinder Gp - LHR Stabilizer 237-4165 16 F-7
Cylinder Gp - RH Boom NOTE A 5 F-3
Cylinder Gp - RHF Stabilizer 237-4165 17 E-6
Cylinder Gp - RHF Steer 234-4115 22 F-4
Cylinder Gp - RHR OSC Lock 236-5773 10 E-4
Cylinder Gp - RHR Stabilizer 237-4165 18 E-7
Cylinder Gp - Stick NOTE A 23 F-7 & F-8
Filter Gp - Case Drain 126-2075 24 B-5
Filter Gp - Pilot Hydraulics 145-7750 24 B-5
Filter Gp - Return Oil 188-4140 24 A-6
Filter Gp - Steer / Pilot Hydraulic 145-7750 25 C-3
Manifold Gp - Pilot Control 273-1393 12 B-8
Motor Gp - Hydraulic Generator (EAME) - - 26 C-1
Motor Gp - Hydraulic Generator (NACD) 251-8483 26 B-4
Motor Gp - Swing 179-9775 27 F-8
Motor Gp - Travel 271-2885 28 F-5
Pump Gp - Generator (EAME) 136-8899 36 B-4
Pump Gp - Generator (NACD) 274-5658 36 B-4
Pump Gp - Main Hydraulic 200-3343 29 B-4
Sensor As - Drive Pump Pressure 221-8859 30 A-4
Sensor As - Idler Pump Pressure 221-8859 31 B-4
Sensor As - XMSN Clutch Pressure 188-3823 12 B-7
Switch As - Auxiliary Pilot Pressure 167-3466 32 D-8
Switch As - Brake Oil Accumulator Pressure 252-6677 2 B-5
Switch As - Generator Pump Pressure 131-9203 26 B-4
Switch As - Grapple Pilot Pressure 167-3466 34 A-8
Switch As - Pilot / Boom Down Pressure 167-3466 35 E-4
Switch As - Pilot Pressure 167-3466 33 C-8
Switch As - Service Brake Pressure 252-6677 2 B-4
Transmission Gp - XMSN 241-3686 28 F-5
Valve As - HCR Check 257-2891 7 E-2
Valve Gp - Auxiliary Pedal 112-5704 32 D-8
Valve Gp - Auxiliary Shuttle 123-2549 32 D-8
Valve Gp - Boom Cylinder Head End Return 215-4919 39 E-3
Valve Gp - Boom Cylinder Rod End Return 215-4890 39 E-3
Valve Gp - Brake Control 249-5527 2 B-5
Valve Gp - Cab Riser Flow Control 257-2892 37 E-1
Valve Gp - Cooler Bypass 173-4672 40 A-7
Valve Gp - Flow Control Boom Float 292-2809 35 D-5
Valve Gp - Front Stabilizer Cylinder Control 196-7543 19 E-6
Valve Gp - Generator Flow Control (EAME) 242-2956 26 C-1
Valve Gp - Grapple Flow Control 168-0712 34 A-8
Valve Gp - HCR / Grapple Pilot Solenoids 259-7429 38 F-1 thru E-1
Valve Gp - HCR / Grapple Rotate Control 274-5501 7 D-2
Valve Gp - Heavy Lift Solenoid 121-6303 35 A-7
Valve Gp - LH Boom Cylinder Check 274-4230 6 F-3
Valve Gp - LH Joystick 206-3304 41 D-8
Valve Gp - Load Control Cab Lowering 185-1247 8 E-2
Valve Gp - Main Control 274-4231 35 D-3 thru D-7
Valve Gp - Manual Boom Lowering 232-7304 4 E-3
Valve Gp - Negative Flow Control Solenoid 171-0188 34 A-7
Valve Gp - Pressure Reducing PRV(1) 184-1227 32 C-8
Valve Gp - Pressure Reducing PRV(2) 184-1227 32 C-8
Valve Gp - Pressure Reducing PRV(3) 184-1227 32 C-8
Valve Gp - Pilot Shuttle 185-0462 33 C-8
Valve Gp - Priority ( Steer / HCR) 188-1814 35 C-2
Valve Gp - Priority (PRV1) 232-4102 35 C-6
Valve Gp - Priority (PRV2) 232-4102 35 C-8
Valve Gp - Rear Stabilizer Cylinder Control 196-7543 20 E-7
Valve Gp - RH Boom Cylinder Check 274-4230 5 F-3
Valve Gp - RH Joystick 206-3303 42 D-7
Valve Gp - Shut Off (Boom) 145-7166 4 F-3
Valve Gp - Shut Off (HCR) 226-9860 13 F-2
Valve Gp - Stabilizer Handle 235-0781 42 D-9
Valve Gp - Steering 235-0772 2 B-2
Component Locations
Valve Gp - Stick Cylinder Double Check 233-7881 25 E-8
Valve Gp - Stick Cylinder Load Control 292-0394 23 E-7 & E-8
Valve Gp - Stick In Priority (PRV3) 206-3354 35 C-8
Valve Gp - Swing Cushion 158-9085 27 E-8
Valve Gp - Travel Pedal 237-2261 32 D-7
Note A: Check Parts Manual for specific cylinder information.
PP Pilot Pressure B-8
QQ Pilot Swing Right Pressure B-4
RR Pilot Swing Left Pressure A-4
SS Remote Travel Control Pressure F-5
TT Travel Motor Control Pressure E-5
UU First Gear Pressure E-5
XX Second Gear Pressure E-5
Valve Gp - Pilot / Boom Down Solenoid 185-0472 35 D-4
Valve Gp - Travel Anti-Cavitation 235-0789 35 C-2
EE
NN
AACCBB DD
EE
MM
EE
UU
XX
TTSS
KK
LL
JJ
HH
GG
FF
35
PP
12
2
28 43
35 72936 38
34
34
37 8
44
44
735
38
HYD
TANK
8
7
30
31
29
17
19 22
5
26
4
27
39
25
1423
24
38
10
31
29
36
30
37 18
34 44
9 20
23
15
13
2
32
21
41
42
1
33
6
3
8
28
43
7
40
12
11
35
16
31
29
36
30
37
34 44
12
38
24
40
25
35
39
26 7
3
6
5
42
41
17
15
18
1619
32
13
22
21 1
33
27 28
43 8 11
10 9
20
2
14
23
BOOM(2)
STICK(1)
SWING
TRAVEL(L)
STRTRAVEL
TRAVEL(R)
GRAPPLE
BUCKET
BOOM(1)
STICK(2)
PILOT CONTROL MANIFOLD
MAIN CONTROL VALVE
BRAKE CONTROL VALVE TRAVEL MOTOR & TRANSMISSIONTOOL CONTROL VALVE CIRCUITMAIN PUMP & FILTER CIRCUITS
MACHINE COMPONENT LOCATIONS

2. RENR8087
30Page,(Dimensions:39inchesx28inches)
THIS SCHEMATIC IS FOR THE M325D MATERIAL HANDLER
PART #: 294-9973 (V) CH02
Components are shown installed on a fully operable machine with the key and engine
off and transmission shifter in neutral.
LINE PATTERNS
Drain / Return Lines
Component Group
Pilot / Load Sensing Pressure
Pressure Line
Attachment
Air Line
CALLOUTS
Taps (Pressure, Sampling,Sensor) by letter
Components by number
YY
52
Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations
DRAIN / RETURN LINE
HYDRAULIC CIRCUIT COLOR DESCRIPTIONS
IDLE PUMP OUTPUT
DRIVE PUMP OUTPUT
STEERING CONTROL CIRCUIT
PILOT PUMP OUTPUT
OSC CYLINDER LOCK CONTROL CIRCUIT
GRAPPLE OR BUCKET CYLINDER CONTROL CIRCUIT
HYDRAULIC CAB RISER CYLINDER CONTROL CIRCUIT
SUPPLY LINE
GENERATOR CIRCUIT (EAME)
STABILIIZER CYLINDER CONTROL CIRCUIT
STICK CYLINDER CONTROL CIRCUIT
TRANSMISSION CLUTCH CONTROL CIRUIT
BOOM CYLINDER CONTROL CIRCUIT
GENERATOR CIRCUIT (NACD)
STEERING PILOT PUMP OUTPUT
TRANSMISSION OIL CIRCULATION PUMP
HYDRUALIC CAB RISER & GRAPPLE ROTATE SUPPLY CIRCUIT
BRAKE CYLINDER CONTROL CIRCUIT
POWER SHIFT CONTROL CIRCUIT
TRAVEL MOTOR CONTROL CIRCUIT
SWING MOTOR CONTROL CIRCUIT
12345679
A
C
D
E
F
12345679
A
B
C
D
E
F
B
8
8
FF
GG
HH
KK
LL
JJ
EE
BB
AA
CC
DD
SS
TTUU
XX
NN
MM
RR
QQ
PP
B2
P2 P1
DR
A2 B1 A1 PRV1
B2
P2 P1
DR
A2 B1 A1 PRV2
TA
P
PRV3
A2A1 A3 A4 A5 A6 A7 A8
B2B1 B3 B4 B5 B6 B7 B8
C
P T
21
3 2 14
P T
1 4 3 2
P T
P T
12
P T
12
3
PRV(3)
2
1
3
PRV(2)
2
1
3
PRV(1)
2
1
A3A4 A2 A1
M2
BK
P
P1
T1/1PST
Z
T5
SPT1/2MA5A5
INOUT
DR
P
T
A2
A1
B1
B2
P A
T
B
A
G
D
C
E F
N
P
DS2
S1 S2
B1 B2
DS1
A2
S3
S1
T
S4
A4
A1
M1
G1A3 Pm
Pi
G2
M2
Pn2
Ps2
PsM2
Ps1
Pn1
PSm1
M3
DrM
Dr2
M4
DR1
P
L
LD
T
R
P
A
P1 YLD
P
B
P T
CFEF
XA XB
P
PA1PA2 P
M
T
A2 A1
M
LS
T
PB2B2 B1 PB1
A2
A3
B2
A1
B1
B4
PB2
A4
PL3
B3
PL2
PL1
A
B
PB1
DR
DR
DR
T
DR
APi
X
C
DR
T A Pi
X
C
MBLEL G
X
G
MAT2
T1U
M1
B
S
A
K
MAX
MIN
B
MB
MK
EB
EK
MS
Z1
T PP T
Z2
Z1
Z2
MU
B
PG
DR
2
5
A
FINE SWING
4 6
3
1
SWIVEL
BL3T AL4 aL4
BL2
R2 AL3 aL3
BL1
AL1
AL2
aL2 aR1al1 Di Pi BR2BR1 AR1 aR2 AR3AR2 aR3 BR3 R1aR4 Pi1 AR4 BR5
BP3
BP2
BR4
A
AR5 aR5 R3
HR
S1 P T
5
6
bR5bR3 bR4 Di1bR2PL PR bR1Pi5bL1bL2 DSTPi3Di2 Pi2 bL3 Di3HL bL4
OPEN
OPEN
FWD
LOWER
LEFT
OUT
IN
SWINGRIGHT
STABILIZERIN
TRAVELREV
GRAPPLECLOSE
BUCKETCLOSE
BOOM(1)
RAISE
STICK(2)
OUT
SCM
INSTICK(1)OUT
RAISEBOOM(2)
SWING
BRAKE
OSC
AXLE
REST
IMPLEMENT
TRAVEL
MOTOR
CONTROL
A
B
STICK OUT
SW L SW R
STICK IN
BOOM DOWN
BCT CL BCT OP
BOOM UP
DOWN
UP
FWD
REV
STABILIZER
AUXCIRCUIT
FWD
REV
TRAVEL
U
DEG
SWIVEL
4 2 1
3
0
MA6A6
TRAVEL
bL1aL1
aL1
bL1
aL2
aL2
aL2
bR1
aR1
bR1
aR1
bR2
bR2
SCM
bR2
bR3
aR2
aR3
aR2
aR4
aR4
Pi
Pi
FILTER GP
PILOT HYD.
145-7750
FILTER GP
CASE DRAIN
126-2075
VALVE GP
BRAKE CONTROL
249-5527
ACCUMULATOR AS
BRAKE CHARGE
255-8546
ACCUMULATOR AS
BRAKE CHARGE
255-8546
FILTER GP
RETURN OIL
188-4140
VALVE GP
COOLER BYPASS
173-4672
FILTER GP
STEER /PILOT HYD.
145-7750
PUMP GP
MAIN HYD
200-3343
SENSOR AS
IDLER PUMP
PRESSURE
221-8859
SENSOR AS
DRIVE PUMP
PRESSURE
221-8859
PUMP GP
GENERATOR
(EAME)
136-8899
VALVE GP
STEERING
235-0772
VALVE GP
PRIORITY
(STEER/HCR)
188-1814
VALVE GP
TRAVEL ANTI-
CAVITATION
235-0789
VALVE GP
GEN FLOW
CONTROL
(EAME)
242-2956
MOTOR GP
HYD GEN
(EAME)
VALVE GP
HCR/GRAPPLE
CONTROL
274-5501
GRAPPLE
ROTATE
ROTATE
CW
ROTATE
CCW
CAB
LOWER
CAB
RAISE
VALVE AS
HCR CHECK
257-2891
ACCUMULATOR AS
HYD CAB RISER
255-8547
VALVE GP
LOAD CONT
CAB LOWERING
185-1247
CYLINDER GP
HYD CAB RISER
235-8287
VALVE GP
SHUT OFF
(HCR)
226-9860
VALVE GP
HCR/GRAPPLE
PILOT SOLENOIDS
259-7429
(HCR UP)
(HCR DOWN)
VALVE GP
PRIORITY
(PRV1)
232-4102
VALVE GP
PRIORITY
(PRV2)
232-4102
VALVE GP
HEAVY LIFT
SOLENOID
121-6303
VALVE GP
NEGATIVE FLOW
CONTROL SOL
171-0188
VALVE GP
GRAPPLE
FLOW
CONTROL
168-0712
SWITCH AS
GRAPPLE
PILOT PRESSURE
167-3466
MANIFOLD GP
PILOT CONTROL
273-1393
ACCUMULATOR GP
PILOT
8U-6159
SENSOR AS
XMSN CLUTCH
PRESSURE 188-3823
VALVE GP
STICK IN
PRIORITY
(PRV3)
206-3354
VALVE GP
PRESSURE
REDUCING
184-1227
VALVE GP
PILOT
SHUTTLE
185-0462
SWITCH AS
PILOT PRESS
167-3466
VALVE GP
RH JOYSTICK
206-3303
VALVE GP
LH JOYSTICK
206-3304 VALVE GP
TRAVEL PEDAL
237-2261
VALVE GP
AUX PEDAL
112-5704
VALVE GP
STABILZER
HANDLE
235-0781
SWITCH AS
AUX PILOT PRESS
167-3466VALVE GP
AUX SHUTTLE
123-2549
MOTOR GP
SWING
179-9775
VALVE GP
SWING CUSHION
158-9085
VALVE GP
STICK CYLINDER
LOAD CONTROL
292-0394
VALVE GP
STICK CYLINDER
LOAD CONTROL
292-0394
VALVE GP
STICK CYLINDER
DOUBLE CHECK
233 -7881
VALVE GP
REAR STAB CYLINDER
LOAD CONTROL SOL
196-7543
VALVE GP
FRONT STAB CYLINDER
LOAD CONTROL SOL
196-7543
CYLINDER GP
LHR STABILIZER
237-4165
CYLINDER GP
RHR STABILIZER
237-4165
CYLINDER GP
LHFSTABILIZER
237-4165
CYLINDER GP
RHF STABILIZER
237-4165
CYLINDER GP
STICK
WHEELBRAKE
WHEELBRAKE
XMSN GP
241-3686
MOTOR GP
TRAVEL
271-2885
CYLINDER GP
LHR OSC LOCK
236-5773
CYLINDER GP
RHR OSC LOCK
236-5773
ACCUMULATOR GP
OSC AXLE REST
8U-2924
CYLINDER GP
RHF STEER
234-4115
CYLINDER GP
LHF STEER
234-4115
ACCUMULATOR GP
BOOM CYLINDER
225-3394
ACCUMULATOR GP
BOOM CYLINDER
225-3394
AUX
TOOL
VALVE GP
LH BOOM CYL
CHECK
274-4230
VALVE GP
RH BOOM CYL
CHECK
274-4230
VALVE GP
SHUT OFF
(BOOM)
145-7166
CYLINDER GP
LH BOOM
CYLINDER GP
RH BOOM
CONNECTOR GP
ORIFICE (HCR)
257-2980
VALVE GP
MANUAL BOOM
LOWERING
232-7304
VALVE GP
BOOM CYL
HEAD END
RETURN SOL
215-4919
VALVE GP
BOOM CYL
ROD END
RETURN SOL
215-4890
VALVE GP
MAIN CONTROL
274-4231
VALVE GP
FLOW CONTROL
BOOM FLOAT
292-2809
SB
SCM
bR3
bR3
GRAPPLE OR BUCKET
SCM
aR3
aR3
SMART
BOOM
SB
WITHOUT
SMART BOOM
SWITCH AS
SERVICE BRAKE
PRESSURE
252-6677
SWITCH AS
BRAKE OIL ACCUMULATOR
PRESSURE
252-6677
SWITCH AS
PILOT/BOOM DOWN
PRESSURE
167-3466
VALVE GP
PILOT/BOOM
DOWN SOLENOID
185-0472
21
P
B
m2
K
m1
B
K
PUMP GP
GENERATOR
(NACD)
274-5658
MOTOR GP
HYD GEN
(NACD)
251-8483
SWITCH AS
GEN PUMP
PRESSURE
131-9203
EAMENACD
aR4
SB
CYLINDER GP
BUCKET
BR3 AR3
BR3
AR3
bR2
bR3
SCM
aR4
SB
aR3
SCM
SCM
SCM
SCM
SCM
OUT IN
DR
VALVE GP
CAB RISER
FLOW CONTROL
257-2892
WITHOUT
SMART BOOM
STICK REGEN
STICK UNLOADING
NFC
RELIEF
NFC
ORIFICE
VARIABLESWING
PRIORITY
MAIN
RELIEF
STRAIGHT
TRAVEL
NEG FLOW
CONTROL
SOLENOID
BOOM
REGEN
NFC
RELIEF
LINE
RELIEF &
MAKEUP
MEDIUM PRESSURE
UNLOADING VALVE
MEDIUM PRESSURE
SIGNAL RELIEF
POWER
SHIFT PRV
PILOT
MEDIUM
PRESS
CROSS
SENSING
PUMP CONTROL
ACTUATOR
ACTUATOR
PUMP
CONTROL
M