INTERACTIVE SCHEMATIC

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 RENR6482-03
July 2009

416E, 422E, and 428E Backhoe Loader

Hydraulic System
416E: 422E: 428E:
SHA1-UP HBE1-UP SNL1-UP
CBD1-UP

© 2009 Caterpillar, All Rights Reserved Printed in U.S.A.

COMPONENT LOCATION
Page 1 of 2

Machine Schematic Part

Description
Location Location Number
416E 422E 428E
1 C-7 ACCUMULATOR GP - RIDE CONTROL 162-3960
2 B-1 COOLER - TRANSMISSION HYDRAULIC OIL 214-2202
CYLINDER GP - BACKHOE BUCKET 210-7086
3 F-2
CYLINDER GP - BACKHOE BUCKET (WITH SENSOR) 210-7085 N/A
CYLINDER GP - BOOM 210-7074
4 F-3
CYLINDER GP - BOOM (WITH SENSOR) 246-9885 N/A
CYLINDER GP - EXTENDABLE STICK 210-7098
5 F-1
CYLINDER GP - EXTENDABLE STICK (WITH SENSOR) 210-7097 N/A
6 C-7 CYLINDER GP - LIFT (LH) 228-3508 215-7298 N/A
7 B-7 CYLINDER GP - LIFT (RH) N/A 214-9373
8 A-7 CYLINDER GP - MULTIPURPOSE BUCKET (LH) 185-1839
9 A-7 CYLINDER GP - MULTIPURPOSE BUCKET (RH) 185-1839
10 F-6 CYLINDER GP - STABILIZER (LH) 262-7049 173-4565
11 F-6 CYLINDER GP - STABILIZER (RH) 262-7050 173-4565
12 A-3 CYLINDER GP - STEERING 214-5097
CYLINDER GP - STICK 210-7078 210-7080
13 F-2
CYLINDER GP - STICK (WITH SENSOR) 210-7077 N/A
14 F-3 CYLINDER GP - SWING (LH) 278-1971
15 F-3 CYLINDER GP - SWING (RH) 278-1971 278-1973
16 B-7 CYLINDER GP - TILT 206-3553 N/A
17 B-7 CYLINDER GP - TILT (LH) N/A 192-3884
18 B-7 CYLINDER GP - TILT (RH) N/A 192-3884
19 B-1 FILTER GP - OIL 210-6243
20 D-5 MANIFOLD GP - CONTROL (BACKHOE) 259-6742 N/A
21 D-7 MANIFOLD GP - CONTROL (BACKHOE) N/A 259-6744
22 C-5 MANIFOLD GP - CONTROL (LOADER) 259-6745 N/A
23 C-5 MANIFOLD GP - CONTROL (LOADER) N/A 259-6743
24 C-7 MANIFOLD GP - RIDE CONTROL 245-8780
25 B-4 PUMP GP - METERING 247-7868
26 C-2 PUMP GP - PISTON (IMPLEMENT AND STEERING) 296-6714
27 C-7 SWITCH AS - PRESSURE (RIDE CONTROL) 304-5696
28 A-3 TANK GP - HYDRAULIC 245-8777
VALVE GP - BANK (BACKHOE) (6 BANK) 248-0483 N/A
29 E-5 VALVE GP - BANK (BACKHOE) (7 BANK) 248-0484 N/A
VALVE GP - BANK (BACKHOE) (8 BANK) 248-0485 N/A
VALVE GP - BANK (BACKHOE) (6 BANK) N/A 248-0486
30 E-5 VALVE GP - BANK (BACKHOE) (7 BANK) N/A 248-0487
VALVE GP - BANK (BACKHOE) (8 BANK) N/A 248-0488
COMPONENT LOCATION
Page 2 of 2
Machine Schematic Part
Description
Location Location Number
416E 422E 428E
VALVE GP - BANK (LOADER) (2 BANK) 248-0481 N/A
31 A-5
VALVE GP - BANK (LOADER) (3 BANK) 248-0482 N/A
VALVE GP - BANK (LOADER) (2 BANK) N/A 247-9655
32 A-5
VALVE GP - BANK (LOADER) (3 BANK) N/A 247-9656
33 A-5 VALVE GP - CONTROL (AUXILIARY) (LOADER) 259-6729
34 E-4 VALVE GP - CONTROL (AUXILIARY) (BACKHOE) 259-6733
35 E-4 VALVE GP - CONTROL (BOOM) 259-6739
36 D-2 VALVE GP - CONTROL (BUCKET) 259-6737
37 D-1 VALVE GP - CONTROL (EXTENDABLE STICK) 259-6734
38 C-5 VALVE GP - CONTROL (LIFT) 259-6732
39 D-5 VALVE GP - CONTROL (STABILIZER) (LH) 259-6746
40 D-6 VALVE GP - CONTROL (STABILIZER) (RH) 259-6746
VALVE GP - CONTROL (STICK) (6 BANK) 259-6736
41 D-2
VALVE GP - CONTROL (STICK) (7, 8 BANK) 259-6735
42 D-3 VALVE GP - CONTROL (SWING) 259-6738
VALVE GP - CONTROL (TILT) (2 BANK) 259-6731 N/A
43 B-5
VALVE GP - CONTROL (TILT) (3 BANK) 259-6730 N/A
VALVE GP - CONTROL (TILT) (2 BANK) N/A 259-6740
44 B-5
VALVE GP - CONTROL (TILT) (3 BANK) N/A 259-6741
45 D-6 VALVE GP - SHUTTLE 8J-6875
TAP LOCATION

Tap Schematic
Description
Number Location
T1 C-2 STEERING AND IMPLEMENT PUMP DISCHARGE
T2 C-2 LOAD SENSING
SOS B-1 OIL SAMPLING
FLUID POWER SYMBOLS
BASIC COMPONENT SYMBOLS

MAIN AUX.
PUMP: VARIABLE and
PUMP or MOTOR FLUID CONDITIONER SPRING CONTROL VALVES RESTRICTION LINE RESTRICTION 2-SECTION PUMP PRESSURE COMPENSATED
(FIXED)

VARIABILITY SPRING LINE RESTRICTION PRESSURE HYDRAULIC PNEUMATIC LINE RESTRICTION ATTACHMENT
(ADJUSTABLE) (VARIABLE) COMPENSATION ENERGY TRIANGLES VARIABLE and PRESSURE
COMPENSATED

VALVE ENVELOPES
VALVES
VALVE PORTS

ONE POSITION TWO POSITION THREE POSITION TWO-WAY THREE-WAY FOUR-WAY

CONTROL VALVES CHECK VALVES

AB AB

P T P T
BASIC SPRING SHUTTLE PILOT
NORMAL POSITION SHIFTED POSITION INFINITE POSITION
SYMBOL LOADED CONTROLLED

FLUID STORAGE RESERVOIRS

VENTED PRESSURIZED RETURN ABOVE FLUID LEVEL RETURN BELOW FLUID LEVEL

MEASUREMENT ROTATING SHAFTS

PRESSURE TEMPERATURE FLOW UNIDIRECTIONAL BIDIRECTIONAL

COMBINATION CONTROLS

SOLENOID SOLENOID SOLENOID SOLENOID and SERVO THERMAL DETENT

or MANUAL and PILOT PILOT or MANUAL

MANUAL CONTROL SYMBOLS

PUSH-PULL LEVER MANUAL SHUTOFF GENERAL MANUAL PUSH BUTTON PEDAL SPRING

RELEASED PRESSURE PILOT CONTROL SYMBOLS

REMOTE SUPPLY PRESSURE

EXTERNAL RETURN INTERNAL RETURN SIMPLIFIED COMPLETE INTERNAL

SUPPLY PRESSURE

ACCUMULATORS CROSSING AND JOINING LINES HYDRAULIC AND PNEUMATIC CYLINDERS

SPRING LOADED GAS CHARGED LINES CROSSING LINES JOINING SINGLE ACTING DOUBLE ACTING

HYDRAULIC PUMPS HYDRAULIC MOTORS INTERNAL PASSAGEWAYS

FIXED VARIABLE DISPLACEMENT FIXED VARIABLE DISPLACEMENT INFINITE THREE TWO

DISPLACEMENT NON-COMPENSATED DISPLACEMENT NON-COMPENSATED POSITIONING POSITION POSITION

UNIDIRECTIONAL UNIDIRECTIONAL

FLOW IN ONE PARALLEL CROSS FLOW ALLOWED IN

BIDIRECTIONAL BIDIRECTIONAL DIRECTION FLOW FLOW EITHER DIRECTION
ELECTRICAL SYMBOLS
Hydraulic Symbols (Electrical)

G M
Transducer Transducer Generator Electric Motor
(Fluid) (Gas / Air)

Pressure Switch Pressure Switch Temperature Switch Electrical Wire

(Adjustable)

Electrical Symbols (Electrical)

Pressure Temperature Level Flow

Symbol Symbol Symbol Symbol

Wire Number Identification Codes

Electrical Schematic Example Hydraulic Schematic Example

Current Standard Current Standard

Harness identification code
This example indicates
wire 135 in harness "AG". Wire
Circuit Number Wire Color
Identification

325-AG135 PK-14
325-PK
Circuit Identification Wire Color Wire Gauge
Number

Previous Standard
Wire Color
Wire

325-PK-14
B A
Circuit Number Wire Gauge
Identification (EXAMPLE VALVE)
 7 6 5 4 3 2 1
(15) CYLINDER GP
SWING (RH)
278-1971 (416E) (13) CYLINDER GP
278-1973 (422E, 428E) (3) CYLINDER GP STICK
(4) CYLINDER GP
BOOM BACKHOE BUCKET 210-7077 (416E WITH CYLINDER
(14) CYLINDER GP (5) CYLINDER GP
210-7074 (ALL) 210-7086 (ALL) POSITION SENSOR)
SWING (LH) 210-7085 (416E WITH CYLINDER EXTENDABLE STICK
246-9885 (416E WITH CYLINDER 210-7078 (416E WITHOUT SENSOR)
278-1971 210-7098 (ALL)
POSITION SENSOR) POSITION SENSOR) 210-7080 (422E, 428E)
210-7097 (416E WITH CYLINDER
(11) CYLINDER GP (10) CYLINDER GP POSITION SENSOR)
F F
STABILIZER (RH) STABILIZER (LH)
262-7050 (416E) 262-7049 (416E)
173-4565 (422E, 428E) 173-4565 (422E, 428E)
(29) VALVE GP (30) VALVE GP
BANK (BACKHOE) BANK (BACKHOE)
248-0483 (6 BANK) 248-0486 (6 BANK)
422E, 428E 248-0484 (7 BANK) 248-0487 (7 BANK) (34) VALVE GP
248-0485 (8 BANK) 248-0488 (8 BANK) CONTROL (35) VALVE GP
(416E) (422E, 428E) (AUXILIARY) (BACKHOE) CONTROL (BOOM)
259-6733 259-6739

A
B
A
B

416E
STABILIZER STABILIZER
C
RH LH
C
D

E E

P
R
N
P
M
N

M
L BOOM SWING BUCKET STICK
E
L

E
AUXILIARY EXTENDABLE
(40) VALVE GP (39) VALVE GP F
F STICK
CONTROL (STABILIZER) (RH) CONTROL G

K J H
G 259-6746 (STABILIZER) (LH) K J H
259-6746
D D
(20) MANIFOLD GP
CONTROL (BACKHOE) (42) VALVE GP (36) VALVE GP (41) VALVE GP
(21) MANIFOLD GP (45) VALVE GP CONTROL (SWING) CONTROL (BUCKET) CONTROL (STICK)
259-6742
CONTROL (BACKHOE) SHUTTLE 259-6738 259-6737 259-6736 (6 BANK)
(416E) (37) VALVE GP
259-6744 8J-6875 259-6735 (7, 8 BANK)
(422E, 428E) CONTROL
(EXTENDABLE STICK)
259-6734

(22) MANIFOLD GP
(1) ACCUMULATOR GP
CONTROL (LOADER)
RIDE CONTROL
259-6745
162-3960
(416E, 422E)
(27) SWITCH AS (23) MANIFOLD GP
PRESSURE (RIDE CONTROL) CONTROL (LOADER)
304-5696 259-6743 T1 (26) PUMP GP
(428E) PISTON (IMPLEMENT
(24) MANIFOLD GP
RIDE CONTROL AND STEERING) T2
245-8780 296-6714
C C

(6) CYLINDER GP
LIFT (LH)
228-3508 (416E)
215-7298 (422E) (38) VALVE GP (25) PUMP GP
CONTROL (LIFT) METERING
259-6732 247-7868

LIFT
(7) CYLINDER GP SOS
LIFT (RH)
214-9373 (19) FILTER GP
(428E) OIL
(17) CYLINDER GP (43) VALVE GP
210-6243
TILT (LH) CONTROL (TILT)
192-3884 259-6730 (3 BANK)
(428E) 259-6731 (2 BANK)
(416E, 422E)
B B
(16) CYLINDER GP (44) VALVE GP
TILT CONTROL (TILT)
206-3553 (2) COOLER
TILT 259-6740 (2 BANK)
(416E, 422E) TRANSMISSION HYDRAULIC OIL
259-6741 (3 BANK)
214-2202
(428E)
(18) CYLINDER GP
TILT (RH)
192-3884
(428E)

(8) CYLINDER GP (33) VALVE GP LINE PATTERNS

MULTIPURPOSE CONTROL HYDRAULIC CIRCUIT COLOR DESCRIPTIONS Pressure Line
BUCKET (LH) (AUXILIARY) (LOADER) MAIN PUMP OUTPUT
Pilot / Load Sensing Pressure
185-1839 (12) CYLINDER GP LIFT CYLINDER CIRCUIT
259-6729 BUCKET CYLINDER CIRCUIT
STEERING LOAD SENSE CIRCUIT Drain / Return Lines
214-5097 STEERING CIRCUIT
Component Group
AUXILIARY STICK CYLINDER CIRCUIT
SUPPLY LINE
BOOM CYLINDER CIRCUIT Attachment
(31) VALVE GP TILT CYLINDER CIRCUIT
BANK (LOADER) EXTENDABLE STICK CYLINDER CIRCUIT Air Line
A 248-0481 (2 BANK)
MULTIPURPOSE BUCKET CYLINDER CIRCUIT
DRAIN / RETURN LINE CALLOUTS A
248-0482 (3 BANK) SIDESHIFT CIRCUIT
SWING CYLINDER CIRCUIT YY Taps (Pressure, Sampling, Sensor - by letter)
(416E, 422E) LOAD SENSE RELIEF CIRCUIT
(9) CYLINDER GP STABILIZER CYLINDER CIRCUIT
MULTIPURPOSE BUCKET (RH) (28) TANK GP AUXILIARY CIRCUIT
(32) VALVE GP
185-1839 HYDRAULIC
BANK (LOADER) THIS SCHEMATIC IS FOR THE 416E, 422E, and 428E BACKHOE LOADER
245-8777
247-9655 (2 BANK) MEDIA NUMBER: RENR6482-03
247-9656 (3 BANK) PART NUMBER: 225-6836, CHANGE: 04, VERSION: -
(428E) Components are shown installed on a fully operable machine.

Refer to the appropriate Service Manual for Troubleshooting, Specifications.

7 6 5 4 3 2 1
MACHINE COMPONENT LOCATIONS
VIEW ALL CALLOUTS

14 10 19 31 32 1 24 27 6 16 17 12 8 2

3 5 13 4 15 11 29 30 45 26 25 28 7 18 9

3 5 13 26 28 2

4 29 30 45 19 31 32 1 24 27 25 12
BACKHOE VALVE
VIEW ALL CALLOUTS

(29/30) 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.

37 41 36 42 35 34 20 21
39 40
IMPLEMENT AND STEERING PUMP
VIEW ALL CALLOUTS

T2 T2
The pump is located below the cab
floor plate. The pump control valve is 19
mounted on top of the pump and SOS
contains a flow compensator spool
and pressure cutoff spool. The
implement and steering pump sup-
plies oil flow to the loader valve
26
group, backhoe valve group, and T1
steering system. These illustration shows the implement and steering
T2 pump out of the machine. The following components are
visible:

T1 28 Load Sensing pressure tap (T2), Pump Discharge pres-

sure tap (T1), Hydraulic Oil Tank (28), Oil Sampling port
26 (SOS), and Hydraulic Oil Filter (19)
LOADER VALVE
VIEW ALL CALLOUTS

SOS
19

26

33
43
(31/32) Loader Valve
44
38
22
23

The 416E, 422E, and 428E machines are

equipped with a mechanically controlled
loader valve.
RIDE CONTROL
VIEW ALL CALLOUTS

27

24