RENR5161-01
16 Page, BJS
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 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
T
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Flow
Symbol
Electrical Symbols (Electrical)
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
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 ACTING
SINGLE 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
AB
PT
AB
PT
SHIFTED POSITION
INFINITE POSITION
CONTROL VALVES
ATTACHMENT
MANUAL SHUTOFF
SHUTTLE PILOT
CONTROLLED
RENR5161-01
February 2005
TH210 & TH215 Telehandler
Hydraulic System
CEC1-500
CEG1-500
MHS1-UP
MHT1-UP
©
2005 Caterpillar
All Rights Reserved
Printed in U.S.A.
Description
Part
Number
Machine
Location
Schematic
Location
VALVE GP - STEERING 203-6812 1 G-9
VALVE GP - MAIN CONTROL
(IMPLEMENT - 4 SLICE)
203-6804 2
VALVE GP - DIVERTER 200-1559 3
CYLINDER GP - BOOM 209-3981
5
CYLINDER GP - COMPENSATING 209-3971
249-3641
6
CYLINDER GP - TELESCOPING 209-3976
7
BLOCK (MANIFOLD) 202-8210 8
HITCH GP - TOWING 216-5921 9
COUPLING - TRAILER BRAKE 200-1560 10
VALVE GP - TRAILER BRAKE 202-8222 11
TAP AS 202-8287 12
OIL COOLER AS 215-2273 13
MOTOR GP - PISTON (HYDROSTATIC) 203-6809 14
PUMP GP - PISTON (HYDROSTATIC) 203-6808
262-4367
15
MOTOR GP - GEAR (FAN DRIVE) 225-4927
237-7994
16
PUMP GP - GEAR (HYDRAULIC FAN) 203-6806
235-8031
17
PUMP GP - GEAR (HYDRAULIC)
(IMPLEMENT, STEERING, AND BRAKING)
233-9591
203-6807
18
FILTER GP - OIL (HYDRAULIC) 200-1547 19
VALVE GP - ACCUMULATOR (CHARGING)
203-6803
214-1425
20
ACCUMULATOR AS - BRAKE 200-1664 21
VALVE GP - BRAKE CONTROL 203-6813 22
TANK GP - HYDRAULIC 209-8940 23
TANK GP - HEADER 211-7110 24
CYLINDER GP - TELESCOPING
209-3977
249-3644
25
VALVE - FAN (BI-DIRECTIONAL) 221-2209 26
MOTOR GP - FAN 219-6901
264-6580
27
VALVE GP - MAIN CONTROL
(IMPLEMENT - 5 SLICE)
Note A: Used only on CEC & CEG machines.
Note B: Used only on MHS & MHT machines.
Note C: Used only on CEC machines.
Note D: Used only on CEG machines.
Note D
Note C
249-3643
Note A
Note B
Note A
Note B
Note A
Note B
Note A
Note B
Note A
Note B
Note A
Note B
Note B
Note A
Note A
Note B
Note A
Note B
Note A
Note B
Note B
249-3642
203-6814 29
G-7
G-5
249-3645
4 G-4
F-4
CYLINDER GP - TILT 209-3973
F-3
E-3
F-3
F-3
D-4
D-4
D-5
C-4
C-4
C-6
B-8
A-8
B-8
B-7
D-8
D-9
D-10
A-9
A-10
E-3
B-10
B-9
G-7
TAP AS 202-8288 28 D-5
Component Locations
3
5
10 12 13
16 27 28
17 23
18
24
1
4
6
9
11
14
15
19
20
21
22
25
7 25
26
13
1
4
6
5
7
8
9
10 12
2816 27
14 15
17 18 19
21
23
24
25
2
3
29
82 29
11
20
2226
VALVE GP
DIVERTER
200-1559
BLOCK
(MANIFOLD)
202-8210
PUMP GP
PISTON
(HYDROSTATIC)
203-6808 (Note A)
262-4367 (Note B)
MOTOR GP
PISTON
(HYDROSTATIC)
203-6809
PUMP GP
GEAR (HYDRAULIC)
203-6807 (Note A)
233-9591 (Note B)
MOTOR GP
GEAR (FAN DRIVE)
225-4927 (Note A)
237-7994 (Note B)
ACCUMULATOR AS
BRAKE
200-1664
Machine Component Locations
Diverter valve is located in the rear service compartment.
The diverter valve is equipped with connections for front
mounted auxiliary services and rear mounted auxiliary
services. The diverter valve permits the operation of one
actuator at a time for either the front auxiliary services or
the rear auxiliary services. The diverter valve is connected
by hoses to the front auxiliary services at quick disconnects.
The hoses are located inside the boom. The diverter valve
is connected to the rear auxiliary services by short hoses
and manifold block.
The gear pump draws oil from the hydraulic tank. The
pump is attached to the engine front housing on the
left side of the engine compartment.
The pump is a fixed displacement gear pump. The
pump supplies oil to the steering system, the braking
system, and the implement system. The rotation of
the shaft is clockwise when the rotation of the shaft
is viewed from the drive end.
DIVERTER VALVE
GEAR PUMP - HYDRAULIC
(IMPLEMENT, STEERING, & BRAKING)
The piston motor is mounted on the transfer gearbox
for the front axle.
The piston motor is a variable displacement piston motor.
The piston motor is operated by high pressure oil from
the piston pump.
The direction of rotation of the piston motor determines
the travel direction of the machine. The speed of the piston
motor determines the input speed of the drive shaft.
PISTON PUMP (HYDROSTATIC)
PISTON MOTOR (HYDROSTATIC)
The fan drive gear motor is located in front of the radiator
at the rear of the machine.
A reversible gear motor is available as an attachment.
The reversible gear motor is operated by a switch in the
cab. The reversible gear motor replaces the standard gear
motor. The reversible gear motor allows the operator to
reverse the air flow through the radiator and the oil cooler
in order to remove dust from the components.
The accumulator for the braking system is located
between the lower hydraulic tank and the main frame.
The accumulator supplies pressurized oil to the
service brakes in the front chassis by way of the
brake valve
The piston pump is attached to the front of the engine.
Open the access door on the right side of the machine
in order to view the piston pump.
The piston pump is an axial piston pump that can vary
the pump displacement. The piston pump is attached
to the engine.
BRAKE ACCUMULATOR
GEAR MOTOR (FAN DRIVE)
The fan drive motor is a fixed displacement gear motor. The
fan drive gear motor is operated by the pressure oil from the
gear pump (fan drive).
RENR5161-01
16 Page, Color 2, BJS
THIS SCHEMATIC IS FOR THE TH210 & TH215 TELEHANDLER
Part #: 211-7272 CHG04
Part #: 211-7272 CHG03
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
Tap s (Pressure, Sampling,Sensor) by letter
Components by number
YY
52
DRAIN/RETURNLINE
LINES GROUP COLOR DESCRIPTIONS
MAIN PUMP OUTPUT
STEERING CIRCUIT
PILOT PUMP OUTPUT
SCAVENGE PUMP
ALTERNATE FAN CONTROL CIRCUIT
SUPPLY LINE
EXTENSION CONTROL CIRCUIT
HYDROSTATIC MOTOR CONTROL CIRCUIT
SECOND SERVICE FRONT CONTROL CIRCUIT
CROWD & COMPENSATION CONTROL CIRCUITS
LIFT CONTROL CIRCUIT
REAR SERVICE AUTOHITCH CONTROL CIRCUIT
A
B
C
D
E
F
G
12345678910
12345678910
A
B
C
D
E
F
G
RH
LH
RH
LH
RH
LH
Min
Front Axle Brakes
rpm
s
LH RH
C3
C2 C1
P
T
C4
B
A
A
A
A
B
B
B
P
A
T
B
M3
A
AL 2 X A
XB
B
L1
L2
P
T
A
Front
Rear
Reversible Fan Arrangement (Attachment)
(When Installed, Replaces Motor Gp - Gear
(Fan Drive) Located at B-8)
B
A
BOOM
TILT
COMPENSATION
TELESCOPING
TRAILER COUPLING
REAR SERVICE
AUTOHITCH
VALVE GP
STEERING
203-6812
VALVE GP
MAIN CONTROL
IMPLEMENT - 4 SLICE
203-6804
IMPLEMENT - 5 SLICE
203-6814 (Note A)
VALVE GP
DIVERTER
200-1559
CYLINDER GP
BOOM
209-3981 (Note A)
249-3645 (Note B)
CYLINDER GP
COMPENSATING
209-3971 (Note A)
249-3641 (Note B)
CYLINDER GP
TELESCOPING
TH210
209-3976 (CEC)
249-3643 (MHT)
TH215
209-3977 (CEG)
249-3644 (MHS)
BLOCK
(MANIFOLD)
202-8210
HITCH GP
TOWING
216-5921
COUPLING
TRAILER BRAKE
200-1560
VALVE GP
TRAILER BRAKE
202-8222
TAP AS
202-8287
202-8288
OIL COOLER AS
215-2273
MOTOR GP
PISTON
(HYDROSTATIC)
203-6809
PUMP GP
PISTON (HYDROSTATIC)
203-6808 (Note A)
262-4367 (Note B)
MOTOR GP
GEAR (FAN DRIVE)
225-4927 (Note A)
237-7994 (Note B)
PUMP GP
GEAR
(HYDRAULIC FAN)
203-6806 (Note A)
235-8031 (Note B)
PUMP GP
GEAR (HYDRAULIC)
203-6807 (Note A)
233-9591 (Note B)
FILTER GP
OIL (HYDRAULIC)
200-1547
VALVE GP
ACCUMULATOR
(CHARGING)
203-6803 (Note A)
214-1425 (Note B)
ACCUMULATOR AS
BRAKE
200-1664
VALVE GP
BRAKE CONTROL
203-6813
TANK GP
HYDRAULIC
209-8940
TANK GP
HEADER
211-7110
VALVE
FAN (BI-DIRECTIONAL)
221-2209
MOTOR GP
FAN
219-6901 (Note A)
264-6580 (Note B)
CYLINDER GP
TILT
209-3973 (Note A)
249-3642 (Note B)
SECOND
SERVICE
FRONT
VALVE ONLY
FOR 203-6814
Note A: Used only on CEC & CEG machines.
Note B: Used only on MHS & MHT machines.
Note C: Used only on CEC machines.
Note D: Used only on CEG machines.
