KENR8042 November 2008
Component Locations
A
Part Number
Machine Location
Schematic Location
Accumulator
226-0420
1
C-5
Cooler - Oil
304-7847
2
B-2
Cylinder - Boom (432E/434E)
268-9049 (S)
3
F-5
Cylinder - Boom (432E/434E)
210-7076
3
F-5
Cylinder - Boom (442E/444E)
268-9051 (S)
3
F-5
Cylinder - Boom (442E/444E)
246-9884
3
F-5
Cylinder - Bucket (432E/434E)
210-7085 (S)
4
F-4
Cylinder - Bucket (432E/434E)
210-7086
4
F-4
Cylinder - Bucket (442E/444E)
210-7095 (S)
4
F-4
Cylinder - Bucket (442E/444E)
210-7096
4
F-4
Cylinder - Coupler
190-3085
5
A-8
Cylinder - Lift (PL/IT)
214-9373
6
B-8
Cylinder - Lift LH (EST 434E)
249-6710
6
B-8
Cylinder - Lift RH (EST 434E)
249-6711
7
C-8
173-4565
8
F-3/F-6
Cylinder - Steer (Front)
N/A
9
B-6
Cylinder - Steer (Rear)
N/A
9
B-5
Cylinder - Stick (432E/434E)
210-7083 (S)
10
F-4
Cylinder - Stick (432E/434E)
210-7084
10
F-4
Cylinder - Stick (442E/444E)
210-7093 (S)
10
F-4
278-1973
12
F-5
Cylinder - Tilt (PL/IT)
192-3884
13
B-8
Cylinder - Tilt (EST 434E)
210-7101
13
B-8
Cylinder - Tilt (EST 444E)
214-9372
13
B-8
325-6257
14
B-2
210-6240
15
A-6
Manifold - Inlet (SS 7 bank)
308-2147
16
E-7
Manifold - Outlet (SS 7Bank)
308-2154
17
E-2
Manifold - PRV
300-4493
18
C-5
Pump Gp
289-6370
19
B-3
Valve - All Wheel Steer (434/444)
256-3089
20
A-4 to A-5
Valve - Backhoe (SS) 7 Bank
293-8701
21
E-2 to E-7
Valve - Control (Boom SS 7Bank)
308-2149
21
E-5
21
E-4
21
E-3
Valve - Control (Stick SS 7Bank)
308-2152
21
E-4
Valve - Control (Stabilizer 7Bank)
308-2148
21
E-3 / E-6
Valve - Control (Swing SS 7Bank)
308-2150
21
E-5
Valve - Coupler
231-2615
22
A-8
Valve - Loader (PL/IT) 3 Bank
293-8703
23
A-7 to C-7
Valve - Control (Lift PL/IT 3Bank)
308-2157
23
B-7
Valve - Control (Tilt PL/IT 3Bank)
308-2163
23
B-7
Valve - Control (Aux PL/IT 3Bank)
308-2159
23
A-7
Valve - Loader Inlet (PL/IT) 3Bank
308-2162
23
C-7
Valve - Loader (EST)
293-8702
24
A-7 to C-7 B-7 C-7
Valve - Pattern Switching
300-4491
25
D-4
Valve - Pilot (Switch)
297-4394
26
C-5
Valve - Pilot (Switch + Detent)
297-4395
26
C-5
ATTACHMENT
VALVE PORTS
TWO - WAY
THREE - WAY
FOUR - WAY
CHECK VALVES
P T SHIFTED POSITION
BASIC SYMBOL
INFINITE POSITION
PRESSURIZED
SPRING LOADED
RETURN ABOVE FLUID LEVEL
SHUTTLE
PILOT CONTROLLED
RETURN BELOW FLUID LEVEL
MEASUREMENT
PRESSURE
ROTATING SHAFTS
TEMPERATURE
FLOW
UNIDIRECTIONAL
BIDIRECTIONAL
COMBINATION CONTROLS
SOLENOID
SOLENOID OR MANUAL
SOLENOID & PILOT
SOLENOID & PILOT OR MANUAL
SERVO
THERMAL
DETENT
MANUAL CONTROL SYMBOLS
GENERAL MANUAL
MANUAL SHUTOFF
PUSH BUTTON
PEDAL
PILOT CONTROL SYMBOLS
INTERNAL RETURN
SPRING
REMOTE SUPPLY PRESSURE
To Wheel Brake
To Tank
27
F-3 / F-6
267-2758
28
C-3 / C-4
Valve Gp - Pilot (Loader)
267-2760
29
C-6
Tank - Hydraulic
246-5286
30
A-2
Tank Gp
245-8777
31
A-2
From Pilot Accumulator
GAS CHARGED
FIXED DISPLACEMENT
© 2008 Caterpillar, All Rights Reserved
Slave Cylinder
308-3437
COMPLETE
INTERNAL SUPPLY PRESSURE
HYDRAULIC & PNEUMATIC CYLINDERS
SIDESHIFT LINES CROSSING
Master Cylinder
SINGLE ACTING
LINES JOINING
HYDRAULIC MOTORS
HYDRAULIC PUMPS
Valve - Stabilizer PO Check
SIMPLIFIED
CROSSING & JOINING LINES
ACCUMULATORS
SPRING LOADED
Valve Gp - Pilot (Backhoe)
FIXED DISPLACEMENT
VARIABLE DISPLACEMENT NON-COMPENSATED
INTERNAL PASSAGEWAYS
VARIABLE DISPLACEMENT NON-COMPENSATED
UNIDIRECTIONAL
UNIDIRECTIONAL
BIDIRECTIONAL
BIDIRECTIONAL
DOUBLE ACTING
INFINITE POSITIONING
3 POSITION
FLOW IN ONE DIRECTION
PARALLEL FLOW
CROSS FLOW
2 POSITION
FLOW IN EITHER DIRECTION
Printed in U.S.A.
Boost Brake Valve
This illustration shows a sectional view of the boosted brake valve group. When the brake pedal is depressed, the boost brake valve moves to the left and inlet oil from the pilot manifold is directed to the master cylinder.
The hydraulic oil filter is located below the machine at the left frame rail. The hydraulic oil filter bypass switch is mounted to the oil filter base.
Pilot Manifold
ELECTRICAL SYMBOLS TABLE HYDRAULIC SYMBOLS (ELECTRICAL)
T3 View of pilot controlled backhoe valve with floor plate removed.
32
D-8
210-7097 (S)
33
F-3
Cylinder - E-Stick
210-7098
33
F-3
Cylinder - MP Bucket
N/A
34
A-8
Sensor - Temperature
N/A
35
B-2
Switch - Differential Pressure
134-0404
35
B-2
Switch - Ride Control Pressure
131-9203
36
C-8
G
Temp Sensor SIDESHIFT CLAMP SOLENOID VALVE
Valve - All Wheel Steer (432/442)
256-3089
20
A-4 to A-5
Valve - Ride Control
245-8780
37
C-8
Valve Gp - Cushion Relief
320-7812
38
F-5
TANK (PLUGGED)
TRANSDUCER (FLUID)
TRANSDUCER (GAS / AIR)
GENERATOR
ELECTRIC MOTOR
PRESSURE SWITCH
PRESSURE SWITCH (ADJUSTABLE)
TEMPERATURE SWITCH
ELECTRICAL WIRE
SOS
Filter Bypass Switch
SIDESHIFT CLAMP GAUGE (PLUGGED)
M
M14x2
M14x2
Filter Bypass Switch
SOS
Temp Sensor
TAP LOCATIONS Tap
A
Description
T1 T2 T3
Pump Discharge Load Sense Pilot Pressure
SOS
PUMP (PLUGGED)
B
HYDRAULIC OIL FILTER
(A) Master Cylinder (B) Brake Pedal
T
Oil Sampling
PRESSURE SWITCH
BOOSTED BRAKES 21 25 11
18 1
30
24 35 23 14
8
ELECTRICAL SYMBOLS (ELECTRICAL)
37 36 32
6
31
13
9
2
34
TANK (LS DRAIN)
LOAD SENSE RELIEF VALVE
A
38
SOS
STAB
STAB
LINE MAKE-UP/ RELIEF VALVE
Loader Valve
Implement and Steering Pump
FLOW SWITCH
ELECTRICAL SCHEMATIC EXAMPLE
HYDRAULIC SCHEMATIC EXAMPLE
CURRENT STANDARD
CURRENT STANDARD
HARNESS IDENTIFICATION CODE THIS EXAMPLE INDICATES WIRE 135 IN HARNESS “AG”
Hydraulic Oil Filter
WIRE
E-STICK
BOOM
10
LEVEL SWITCH
WIRE NUMBER IDENTIFICATION CODES
LOAD SENSE
Implement and Steering Pump
B
TEMPERATURE SWITCH
Loader Valve
BUCKET
33 4
CIRCUIT NUMBER IDENTIFICATION
325-AG135 PK-14
STICK
SWING
CIRCUIT NUMBER IDENTIFICATION
WIRE COLOR
WIRE COLOR
WIRE GAUGE
325-PK
PREVIOUS STANDARD
SEVEN BANK VALVE WIRE
H
3
C
J
L
K
D
B
325-PK-14
G
12
WIRE COLOR
A
E B
8 28
26 29
9
19
7
15
For other bank valve configurations see RENR6487 (Specifications Manual).
33 4
10
28
26 29
19
30 31
13
WIRE GAUGE
(EXAMPLE VALVE)
A
5 22
34
13
CIRCUIT NUMBER IDENTIFICATION
2 C
T2
BACKHOE VALVE
H
B
C
D
E
P R
A
(A) Flow Compensator Adjustment Screw (B) Torque Control Spool Adjustment Screw (C) Inlet Port (D) Case Drain Port (E) Torque control Solenoid (F) Torque Limiter (H) Pump Control Valve (T1) Discharge pressure tap (T2) Load Sensing Pressure Tap
3
T2
C
T1
21 18
9
35 14 37 36 32 24 23
15
6
9
34
B
F
A
(A) Ride Control Relay (B) Ride Control Solenoid (C) Ride Control Accumulator (D) Ride Control Pressure Switch
Drain
T1 C E G
25 1
M
THREE BANK VALVE (PILOT OPERATED)
B
E
38
N
F
T2
D
11 12
8
D
View of mechanically controlled loader valve with floor plate removed.
(A) Outlet manifold (B)Auxiliary control valve (C) Tilt control valve (D) Lift control valve (E) Inlet manifold (F) Load sensing relief valve (G) Solenoid for the B circuit
5 22
(H) Solenoid for the A circuit (J) Makeup and relief valve (K) B pilot line port (L) A pilot line port (M) Priority Valve (N) Dead engine lower valve (P) A ports (R) B ports
D
C
ECM
7
COMPONENT LOCATIONS
IMPLEMENT / STEERING PUMP
For other bank valve configurations see RENR6487 (Specifications Manual).
LOADER VALVE
RIDE CONTROL
(Dimensions: 39 inches x 28 inches)
162-3960
Cylinder - E-Stick
30 Page,
Attachments Accumulator - Ride Control
LINE RESTRICTION (VARIABLE & PRESSURE COMPENSATED)
A B
EXTERNAL RETURN
308-2151
24
PUMP (VARIABLE & PRESSURE COMPENSATED)
(C) Wear Plate (D) Stabilizers
308-2153
24
HYDRAULIC PNEUMATIC ENERGY TRIANGLES
THREE POSITION
RELEASED PRESSURE
Valve - Control (Bucket SS 7Bank)
308-2158
PUMP (2 - SECTION)
VALVES
TWO POSITION
PUSH - PULL LEVER
Valve - Control (E-Stick 7Bank)
308-2156
432E, 434E, 442E, and 444E Backhoe Loader Hydraulic System
C
HXB1-UP SXB1-UP PCR1-UP RXS1-UP
HMU
Valve - Loader Inlet (EST 3Bank)
ONE POSITION
VENTED
D
Filter
Valve - Control (Tilt EST 3Bank)
PRESSURE COMPENSATION
LINE RESTRICTION (FIXED)
FLUID STORAGE RESERVOIRS
Cylinder - Stabilizer
Cylinder - Swing (RH)
LINE RESTRICTION (VARIABLE)
RESTRICTION
AUX
(A) Hydraulic Cylinder (B) Wear Pad
B-8
F-4
SPRING (ADJUSTABLE)
P T
C-8
F-5
VARIABILITY
NORMAL POSITION
6
10
CONTROL VALVES
CONTROL VALVES
7
11
SPRING
AB
249-6712
210-7094
FLUID CONDITIONER
B
249-6713
278-1971
PUMP OR MOTOR
VALVE ENVELOPES
Cylinder - Lift RH (EST 444E)
Cylinder - Swing (LH)
MAIN
A
Cylinder - Lift LH (EST 444E)
Cylinder - Stick (442E/444E)
BASIC COMPONENT SYMBOLS
KENR8042
Description
FLUID POWER SYMBOLS