INTERACTIVE SCHEMATIC
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RENR6482-03
July 2009
416E, 422E, and 428E Backhoe Loader
Hydraulic System
416E:
SHA1-UP
CBD1-UP
422E:
HBE1-UP
428E:
SNL1-UP
Printed in U.S.A.© 2009 Caterpillar, All Rights Reserved
Page 1 of 2
COMPONENT LOCATION
Machine
Location
Schematic
Location
Description
416E 422E 428E
1
C-7 ACCUMULATOR GP - RIDE CONTROL
2
B-1 COOLER - TRANSMISSION HYDRAULIC OIL
CYLINDER GP - BACKHOE BUCKET
CYLINDER GP - BACKHOE BUCKET (WITH SENSOR) 210-7085
CYLINDER GP - BOOM
CYLINDER GP - BOOM (WITH SENSOR) 246-9885
CYLINDER GP - EXTENDABLE STICK
CYLINDER GP - EXTENDABLE STICK (WITH SENSOR) 210-7097
6
C-7 CYLINDER GP - LIFT (LH) 228-3508 215-7298 N/A
7
B-7 CYLINDER GP - LIFT (RH) 214-9373
8
A-7 CYLINDER GP - MULTIPURPOSE BUCKET (LH)
9
A-7 CYLINDER GP - MULTIPURPOSE BUCKET (RH)
10
F-6 CYLINDER GP - STABILIZER (LH) 262-7049
11
F-6 CYLINDER GP - STABILIZER (RH) 262-7050
12
A-3 CYLINDER GP - STEERING
CYLINDER GP - STICK 210-7078
CYLINDER GP - STICK (WITH SENSOR) 210-7077
14
F-3 CYLINDER GP - SWING (LH)
15
F-3 CYLINDER GP - SWING (RH) 278-1971
16
B-7 CYLINDER GP - TILT N/A
17
B-7 CYLINDER GP - TILT (LH) 192-3884
18
B-7 CYLINDER GP - TILT (RH) 192-3884
19
B-1 FILTER GP - OIL
20
D-5 MANIFOLD GP - CONTROL (BACKHOE) 259-6742
21
D-7 MANIFOLD GP - CONTROL (BACKHOE) N/A
22
C-5 MANIFOLD GP - CONTROL (LOADER) N/A
23
C-5 MANIFOLD GP - CONTROL (LOADER) 259-6743
24
C-7 MANIFOLD GP - RIDE CONTROL
25
B-4 PUMP GP - METERING
26
C-2 PUMP GP - PISTON (IMPLEMENT AND STEERING)
27
C-7 SWITCH AS - PRESSURE (RIDE CONTROL)
28
A-3 TANK GP - HYDRAULIC
VALVE GP - BANK (BACKHOE) (6 BANK) 248-0483
VALVE GP - BANK (BACKHOE) (7 BANK) 248-0484
VALVE GP - BANK (BACKHOE) (8 BANK) 248-0485
VALVE GP - BANK (BACKHOE) (6 BANK) N/A
VALVE GP - BANK (BACKHOE) (7 BANK) N/A
VALVE GP - BANK (BACKHOE) (8 BANK) N/A
162-3960
214-2202
3
F-2
210-7086
N/A
4
F-3
210-7074
N/A
5
F-1
210-7098
N/A
N/A
185-1839
173-4565
173-4565
185-1839
214-5097
13
F-2
210-7080
N/A
278-1971
278-1973
206-3553
N/A
210-6243
N/A
259-6744
259-6745
N/A
245-8780
247-7868
296-6714
304-5696
245-8777
N/A
N/A
N/A
29
E-5
248-0486
248-0487
248-0488
E-5
30
Part
Number
N/A
Page 2 of 2
COMPONENT LOCATION
Machine
Location
Schematic
Location
Description
416E 422E 428E
VALVE GP - BANK (LOADER) (2 BANK)
VALVE GP - BANK (LOADER) (3 BANK)
VALVE GP - BANK (LOADER) (2 BANK)
VALVE GP - BANK (LOADER) (3 BANK)
248-0481
248-0482
N/A
N/A
33
A-5 VALVE GP - CONTROL (AUXILIARY) (LOADER)
34
E-4 VALVE GP - CONTROL (AUXILIARY) (BACKHOE)
35
E-4 VALVE GP - CONTROL (BOOM)
36
D-2 VALVE GP - CONTROL (BUCKET)
37
D-1 VALVE GP - CONTROL (EXTENDABLE STICK)
38
C-5 VALVE GP - CONTROL (LIFT)
39
D-5 VALVE GP - CONTROL (STABILIZER) (LH)
40
D-6 VALVE GP - CONTROL (STABILIZER) (RH)
VALVE GP - CONTROL (STICK) (6 BANK)
VALVE GP - CONTROL (STICK) (7, 8 BANK)
42
D-3 VALVE GP - CONTROL (SWING)
VALVE GP - CONTROL (TILT) (2 BANK)
VALVE GP - CONTROL (TILT) (3 BANK)
VALVE GP - CONTROL (TILT) (2 BANK)
VALVE GP - CONTROL (TILT) (3 BANK)
259-6731
259-6730
N/A
N/A
45
D-6 VALVE GP - SHUTTLE 8J-6875
259-6739
259-6729
259-6733
32
A-5
247-9656
N/A
N/A
247-9655
259-6738
259-6737
259-6734
259-6732
259-6746
41
D-2
Part
Number
259-6746
259-6736
259-6735
31
A-5
43 B-5
N/A
N/A
259-6740
259-6741
44
B-5
TAP LOCATION
Tap
Number
Schematic
Location
Description
T1
STEERING AND IMPLEMENT PUMP DISCHARGE
T2
LOAD SENSING
C-2
C-2
SOS
OIL SAMPLING
B-1
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
LINE PATTERNS
Drain / Return Lines
Component Group
Pilot / Load Sensing Pressure
Pressure Line
Attachment
Air Line
CALLOUTS
Taps (Pressure, Sampling, Sensor - by letter)
YY
HYDRAULIC CIRCUIT COLOR DESCRIPTIONS
AUXILIARY CIRCUIT
MAIN PUMP OUTPUT
LIFT CYLINDER CIRCUIT
BUCKET CYLINDER CIRCUIT
LOAD SENSE CIRCUIT
STEERING CIRCUIT
STICK CYLINDER CIRCUIT
SUPPLY LINE
BOOM CYLINDER CIRCUIT
TILT CYLINDER CIRCUIT
EXTENDABLE STICK CYLINDER CIRCUIT
MULTIPURPOSE BUCKET CYLINDER CIRCUIT
DRAIN / RETURN LINE
SIDESHIFT CIRCUIT
SWING CYLINDER CIRCUIT
LOAD SENSE RELIEF CIRCUIT
STABILIZER CYLINDER CIRCUIT
THIS SCHEMATIC IS FOR THE 416E, 422E, and 428E BACKHOE LOADER
MEDIA NUMBER: RENR6482-03
PART NUMBER: 225-6836, CHANGE: 04, VERSION: -
Components are shown installed on a fully operable machine.
Refer to the appropriate Service Manual for Troubleshooting, Specifications.
A
B
C
D
E
F
1234567
A
B
C
D
E
F
1234567
STABILIZER
RH
STABILIZER
LH
AUXILIARY
BOOM SWING BUCKET STICK
EXTENDABLE
STICK
AUXILIARY
TILT
LIFT
T2
T1
416E
A
B
C
D
E
F
R
P
N
M
L
A
B
C
D
E
F
G
H
J
K
R
P
N
M
L
SOS
(26) PUMP GP
PISTON (IMPLEMENT
AND STEERING)
296-6714
(28) TANK GP
HYDRAULIC
245-8777
(2) COOLER
TRANSMISSION HYDRAULIC OIL
214-2202
(19) FILTER GP
OIL
210-6243
(25) PUMP GP
METERING
247-7868
(12) CYLINDER GP
STEERING
214-5097
(6) CYLINDER GP
LIFT (LH)
228-3508 (416E)
215-7298 (422E)
(7) CYLINDER GP
LIFT (RH)
214-9373
(428E)
(16) CYLINDER GP
TILT
206-3553
(416E, 422E)
(18) CYLINDER GP
TILT (RH)
192-3884
(428E)
(9) CYLINDER GP
MULTIPURPOSE BUCKET (RH)
185-1839
(11) CYLINDER GP
STABILIZER (RH)
262-7050 (416E)
173-4565 (422E, 428E)
(10) CYLINDER GP
STABILIZER (LH)
262-7049 (416E)
173-4565 (422E, 428E)
(4) CYLINDER GP
BOOM
210-7074 (ALL)
246-9885 (416E WITH CYLINDER
POSITION SENSOR)
(15) CYLINDER GP
SWING (RH)
278-1971 (416E)
278-1973 (422E, 428E)
(14) CYLINDER GP
SWING (LH)
278-1971
(3) CYLINDER GP
BACKHOE BUCKET
210-7086 (ALL)
210-7085 (416E WITH CYLINDER
POSITION SENSOR)
(13) CYLINDER GP
STICK
210-7077 (416E WITH CYLINDER
POSITION SENSOR)
210-7078 (416E WITHOUT SENSOR)
210-7080 (422E, 428E)
(5) CYLINDER GP
EXTENDABLE STICK
210-7098 (ALL)
210-7097 (416E WITH CYLINDER
POSITION SENSOR)
(29) VALVE GP
BANK (BACKHOE)
248-0483 (6 BANK)
248-0484 (7 BANK)
248-0485 (8 BANK)
(416E)
(30) VALVE GP
BANK (BACKHOE)
248-0486 (6 BANK)
248-0487 (7 BANK)
248-0488 (8 BANK)
(422E, 428E)
(45) VALVE GP
SHUTTLE
8J-6875
(31) VALVE GP
BANK (LOADER)
248-0481 (2 BANK)
248-0482 (3 BANK)
(416E, 422E)
(32) VALVE GP
BANK (LOADER)
247-9655 (2 BANK)
247-9656 (3 BANK)
(428E)
(22) MANIFOLD GP
CONTROL (LOADER)
259-6745
(416E, 422E)
(23) MANIFOLD GP
CONTROL (LOADER)
259-6743
(428E)
(21) MANIFOLD GP
CONTROL (BACKHOE)
259-6744
(422E, 428E)
(24) MANIFOLD GP
RIDE CONTROL
245-8780
(1) ACCUMULATOR GP
RIDE CONTROL
162-3960
(27) SWITCH AS
PRESSURE (RIDE CONTROL)
304-5696
(38) VALVE GP
CONTROL (LIFT)
259-6732
(44) VALVE GP
CONTROL (TILT)
259-6740 (2 BANK)
259-6741 (3 BANK)
(428E)
(43) VALVE GP
CONTROL (TILT)
259-6730 (3 BANK)
259-6731 (2 BANK)
(416E, 422E)
(33) VALVE GP
CONTROL
(AUXILIARY) (LOADER)
259-6729
(37) VALVE GP
CONTROL
(EXTENDABLE STICK)
259-6734
(41) VALVE GP
CONTROL (STICK)
259-6736 (6 BANK)
259-6735 (7, 8 BANK)
(36) VALVE GP
CONTROL (BUCKET)
259-6737
(42) VALVE GP
CONTROL (SWING)
259-6738
(35) VALVE GP
CONTROL (BOOM)
259-6739
(34) VALVE GP
CONTROL
(AUXILIARY) (BACKHOE)
259-6733
(20) MANIFOLD GP
CONTROL (BACKHOE)
259-6742
(416E)
(40) VALVE GP
CONTROL (STABILIZER) (RH)
259-6746
G
HJK
422E, 428E
(39) VALVE GP
CONTROL
(STABILIZER) (LH)
259-6746
(17) CYLINDER GP
TILT (LH)
192-3884
(428E)
(8) CYLINDER GP
MULTIPURPOSE
BUCKET (LH)
185-1839
MACHINE COMPONENT LOCATIONS
45
45
32
32
31
31
30
30
29
29
28
28
27
27
26
26
25
25
24
24
19
19
18
17
16
15
14
13
13
12
12
11
10
9
8
7
6
5
5
4
4
3
3
2
2
1
1
VIEW ALL CALLOUTS
BACKHOE VALVE
The 416E, 422E, and 428E
machines are equipped with a
mechanically controlled back-
hoe valve that is visible with
the floor plate at the rear of
the cab removed.
(29/30) Backhoe Valve
4241
4039
37 36 35 34 21
20
VIEW ALL CALLOUTS
IMPLEMENT AND STEERING PUMP
The pump is located below the cab
floor plate. The pump control valve is
mounted on top of the pump and
contains a flow compensator spool
and pressure cutoff spool. The
implement and steering pump sup-
plies oil flow to the loader valve
group, backhoe valve group, and
steering system.
These illustration shows the implement and steering
pump out of the machine. The following components are
visible:
Load Sensing pressure tap (T2), Pump Discharge pres-
sure tap (T1), Hydraulic Oil Tank (28), Oil Sampling port
(SOS), and Hydraulic Oil Filter (19)
28
26
26
19
SOS
T2
T2
T2
T1
T1
VIEW ALL CALLOUTS
LOADER VALVE
The 416E, 422E, and 428E machines are
equipped with a mechanically controlled
loader valve.
(31/32) Loader Valve
44
43
38
33
26
23
22
19
SOS
VIEW ALL CALLOUTS
RIDE CONTROL
27
24
1
VIEW ALL CALLOUTS
