INTERACTIVE SCHEMATIC
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Cover Page
Information
Schematic
Machine Views
Component Table
Tap Table
Fluid Power Symbols
Electrical Symbols
Front Frame
Rear Frame
Tap Views
Features
Options
Bookmarks
X
EC-C3
EC-C2
E-C60
EC-C1
E-C61
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Hydraulic System
TH220B, TH330B & TH340B Telehandler
TH220B:
SLA1-UP
TH330B:
SLB1-UP
TH340B:
SLC1-UP
©
2006 Caterpillar, All Rights Reserved
Printed in U.S.A.
RENR7710-02
January 2006
COMPONENT LOCATION
Part
Number
Machine
Location
Schematic
Location
Cooler & Mtg Gp -Hydraulic Oil (Xmsn) (Option)
(12KW) 206-5502
(20KW) 194-0952
(220) 278-2112
Cylinder Gp - Boom (Raise) (330) 253-2574
(340) 253-2964
Cylinder Gp - Brake (Master) 217-6130
(220/330) 190-3085
Cylinder Gp - Coupler
(340) 216-2406
(220) 187-3694
Cylinder Gp - Tilt (330) 187-3698
(340) 219-1935
Cylinder Gp - Frame Leveling (340) 219-6582
(220) 187-3695
Cylinder Gp
- Hydraulic
(Compensating) (330) 187-3699
(340) 219-1936
(220) 283-6315
Cylinder Gp - Telescoping (330) 283-6316
(340) 241-3158
Filter Gp -Oil (Power Train) 191-1060
Motor Gp - Fan (Reversing Motor) (220/330) 256-2843
Pump Gp - Fan (Reversing Fan) (220/330) 256-7180
Pump Gp - Metering (Steering - HMU) 233-6072
Pump Gp - Piston (Main) 257-6254
Strainer - (Tank Filter) 202-5350
Tank As - Hydraulic
(202/330) 216-2258
(340) 248
-4000
Valve
& Mtg Gp - Diverter (Dual Auxiliary) 222-4662
Valve As - (Tilt Cylinder Lock) (Cartridge) 188-3214
Valve Gp - Bank 4 (Implement) 242-7958
Valve Gp - Check (Xmsn) 257-4830
Valve Gp - Check (Back Pressure) 225-1912
Valve Gp - Check (Coupler Cylinder Check)
(220/330) 190-3611
(340) 236-4441
Valve Gp - Combination (Trailer Services Valve) (Option) (202/330) 215-2303
Valve Gp - Control (Aux) 227-1207
Valve Gp -
Control (Boom Extend, Retract
) 227-1206
Valve Gp - Control (Boom Raise, Lower) 227-1209
Valve Gp - Control (Quick Coupler Tilt) 227-1208
Valve Gp - Diverter (Single Auxiliary) 226-6494
Valve Gp - Electronic Pilot 247-7829
Valve Gp - Load Control (Boom Raise Lock)
(220/330) 229-2004
(340) 184-6471
Valve Gp - Load Control (Frame Level) (340) 265-0884
Valve Gp - Load Control (Tele Cylinder) 252-5652
Valve Gp - Manifol
d (Inlet) 227-1203
Valve
Gp - Manifold (Outlet) 227-1205
Valve Gp - Pilot (Anti Kick) 216-4237
Valve Gp - Solenoid (Frame Level Arctic) (Option) (340) 262-1178
Valve Gp - Relief (Reversing Fan) (220/330) 264-0047
Valve Gp - Solendoid (Reversing Fan) (220/330) 264-0048
Valve Gp - Solendoid (Steer Mode Select) 210-7217
(5spPsy) 206-4386
XMSN Gp -(Option) (4spPsy) 206-4387
(4spPsh) 206-4388
Description
1 A-5
2 G-4
3 B-2
4 H-5 , H-7
5 F-5
6 H-4
7 F-5
8 G-7
9 B-5
10
I-10
11
I-9
12 F-9
13 B-9
14 A-8
15 A-9
16 I-8
17 F-6
18 B-7
19 B-6
20 B-8
21 H-5 , H-6
22 H-2
23 D-6
24 D-7
25 D-5
26 D-5
27 H-8 , I-5
28 C-4
29 F-4
30 I-4
31 F-7
32 D-8
33 D-4
34 G-5
35 C-9
36
H-9
37
I-10
38 E-10
39 A-6
TAP LOCATION
Tap
Number
Description
Schematic
Location
AA Main Pump Pressure C-9
BB Load Sensor Pressure C-9
CC Implement Pilot Pressure C-3
DD SOS Oil Sample Port B-5
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
A
B
C
D
E
F
G
H
I
A
B
C
D
E
F
G
H
I
10 9 8 7 6 5 4 3 2 1
10 9 8 7 6 5 4 3 2 1
HYDRAULIC CIRCUIT COLOR DESCRIPTIONS
Main Pump Output.
Pilot Cicuit.
Scavenge Pump Output.
Supply Line.
Drain / Return Line.
Load Sense Ciruit.
Steering Control Circuit.
Tele Control Cicuit.
XMSN Charge Pump Output.
Auxilary Control Circuit.
Boom Control Circuit.
Reverse Fan Pump Output.
Frame Level Control Circuit.
Quick Coupler Tilt Control Cicuit.
Master Brake Cylinder Ciruit.
Trailer Services Control Circuit.
LINE PATTERNS
Drain / Return Lines
Component Group
Pilot / Load Sensing Pressure
Pressure Line
Attachment
Air Line
CALLOUTS
Taps (Pressure, Sampling,Sensor) by letter
YY
TORQUE
CONV'T
R/V
10 Bar
LUBE
CLUTCH
PACKS/
SYNC'S
DIFF
LOCK
ON/OFF
REG
16 Bar
ECM
JOYSTICK
HANDLE
FILL
VENT LINE
CHARGE PUMP
SPEEDS AS
IMPL. PUMP
SCAVENGE PUMP
L R
LS
T P
C1 C2
C3
C4
STEER
TELE
TILT
A B
A B
P GAUGE
LS GAUGE
A B
A B
HMU
P
BRAKES
T BRAKES
P
T
T
PIL
REV
FAN
P PIL
P PIL GAUGE
(SUPPLY TO
TRAILER SERVICES)
FRONT
REAR
PILOT
SHUT-OFF
Neil Portus
(13) PUMP GP
PISTON (MAIN)
257-6254
(35) VALVE GP
SOLENOID
(FRAME LEVEL
ARCTIC) (OPTION)
262-1178 (340)
(20) VALVE GP
CHECK (BACK
PRESSURE)
225-1912
BOOM
VALVE TRAVEL
BOOSTED BRAKE ACTUATION
A B
A B
AUX 2
AUX 1
AUX 1
A2
B2
A1
B1
A1
B1
(220/330 OPTION)
(15) TANK AS
HYDRAULIC
216-2258 (220/330)
248-4000 (340)
(14) STRAINER
TANK FILTER
202-5350
(18) VALVE GP
BANK 4
(IMPLEMENT)
242-7958
(19) VALVE GP
CHECK (XMSN)
257-4830
(9) FILTER GP
OIL (POWER TRAIN)
191-1060
(22) VALVE GP
COMBINATION
(TRAILER SERVICES
VALVE) (OPTION)
215-2303 (220/330)
(34) VALVE GP
PILOT
(ANTI KICK)
216-4237
SOS
DD
TRAILER SERVICES
(OPTION)
AUX 1, AUX QC, & AUX 2
(OPTION)
AUX 1 & AUX QC
(340)
FRAME LEVEL
(16) VALVE & MTG GP
DIVERTER (DUAL AUX)
222-4662
(10) MOTOR GP
FAN
(REVERSING
MOTOR)
256-2843
(11) PUMP GP
FAN
(REVERSING FAN)
256-7180
(37) VALVE GP
SOLENOID
(REVERSING
FAN)
264-0048
(36) VALVE GP
RELIEF
(REVERSING FAN)
264-0047
(4) CYLINDER GP
COUPLER
190-3085 (220/330)
216-2406 (340)
(4) CYLINDER GP
COUPLER
190-3085 (220/330)
216-2406 (340)
(27) VALVE GP
DIVERTER (SINGLE AUX)
226-6494
(27) VALVE GP
DIVERTER (SINGLE AUX)
226-6494
VALVE
OPTIONS
VALVE
OPTIONS
(30) VALVE GP
LOAD CONTROL
(FRAME LEVEL)
265-0884 (340)
(6) CYLINDER GP
FRAME LEVELING
219-6582 (340)
(3) CYLINDER GP
BRAKE (MASTER)
217-6130
(12) PUMP GP
METERING
(STEERING - HMU)
233-6072
(38) VALVE GP
SOLENOID
(STEER MODE SELECT)
210-7217
(32) VALVE GP
MANIFOLD (INLET)
227-1203
(23) VALVE GP
CONTROL (AUX)
227-1207
(24) VALVE GP
CONTROL
(BOOM EXTEND, RETRACT)
227-1206
(25) VALVE GP
CONTROL
(BOOM RAISE,
LOWER)
227-1209
(26) VALVE GP
CONTROL
(QUICK COUPLER
TILT)
227-1208
(33) VALVE GP
MANIFOLD (OUTLET)
227-1205
(28) VALVE GP
ELECTRONIC PILOT
247-7829
(1) COOLER & MTG GP
HYDRAULIC OIL
(XMSN) (OPTION)
206-5502 (12kW)
194-0952 (20kW)
(39) XMSN GP
(OPTION)
206-4386 (5spPsy)
206-4387 (4spPsy)
206-4388 (4spPsh)
(8) CYLINDER GP
TELESCOPING
283-6315 (220)
283-6316 (330)
241-3158 (340)
(31) VALVE GP
LOAD CONTROL
(TELE CYLINDER)
252-5652
(5) CYLINDER GP
TILT
187-3694 (220)
187-3698 (330)
219-1935 (340)
(17) VALVE AS
(TILT CYLINDER LOCK)
(CATRIDGE)
188-3214
(2) CYLINDER GP
BOOM (RAISE)
278-2112 (220)
253-2574 (330)
253-2964 (340)
(29) VALVE GP
LOAD CONTROL
(BOOM RAISE LOCK)
229-2004 (220/330)
184-6471 (340)
(7) CYLINDER GP
HYDRAULIC
(COMPENSATING)
187-3695 (220)
187-3699 (330)
219-1936 (340)
B
SEE LOC
I-8 or I-6
A
SEE LOC
I-8 or I-6
B
SEE LOC
E-6
A
SEE LOC
E-6
B
SEE LOC
E-6
A
SEE LOC
E-6
LS
P
T
STEER
P
LS
STEER
M/C
SEE LOC
G-1
P
REV
FAN
T
SEE LOC
H-10
SEE LOC
H-9
(220/330)
REVERSING FAN
SEE LOC
B-8
SEE LOC
B-8
REV
FAN
P
REV
FAN
T
A3
B3
A3 A3
B3
BRAKE
TOW HITCH TIPPING
M/C
SEE LOC
B-1
LS
SEE LOC
H-1
T
SEE LOC
D-3
T
SEE LOC
G-1 or H-3
SEE LOC
G-1 or H-3
P
SEE LOC
C-3
P
T
SEE LOC
D-3
SEE LOC
C-3
P
LS
SEE LOC
D-3
(21) VALVE GP
CHECK (COUPLER
CYLINDER CHECK)
190-3611 (220/330)
236-4441 (340)
(21) VALVE GP
CHECK (COUPLER
CYLINDER CHECK)
190-3611 (220/330)
236-4441 (340)
340
220/330
340
220/330
CC
BB
AA
THIS SCHEMATIC IS FOR THE TH220B, TH330B , & TH340B TELEHANDLER
Part #: 207-2706 CHG 10 (220/330)
Part #: 207-2707 CHG 09 (340)
Components are shown installed on a fully operable machine with the key and engine
off and transmission shifter in neutral.
(52) VALVE GP - CONTROL
138-1234
Callout Number
(Machine Location from
Component Locations Table
Component
Name
Part Number
MACHINE COMPONENT LOCATIONS
39
39
38
38
35
35
34
34
33
32
31
31
30
30
29
29
28
27
27
26
25
24
23
22
21
21
20
20
19
19
18
17
17
16
16
15
15
14
14
13
13
12
12
9
9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
VIEW ALL CALLOUTS
DIVERTER VALVE
Diverter Valve (auxiliary single)
Control Valve (dual auxiliary)
On TH220B standard machines, a single Diverter
Valve (auxiliary single) is installed. A dual Control
Valve (dual auxiliary) i s installed as an o ption on
the TH220B machines. The single Diverter Valve
(auxiliary single) and the dual Control Valve (dual
auxiliary) are available options on the TH330B and
TH340B machines.
The single valve diverts the oil flow from th e auxiliary
circuit section of the i mplement main control valve to
either the quick coupler cylinder or through Fitting
Assembly (quick disconnect) to a work tool cylinder.
The dual diverter valve provides an oil flow to an
additional auxiliar
y service.
27
27
16
VIEW ALL CALLOUTS
FRAME LEVELING
The frame leveling cylinder is located at the front of
the machine on the righ t side. The head end of the
cylinder is attached to the machine frame, and the
rod end is attached to the front axle.
The frame leveling cylinder allows the machine frame
to be levelled i
n order to improve the stability of the
machine during operation.
The lock valve is attached to the casing of the frame
leveling cylinder.
The valve controls the flow of oil into the cylinder and
out of the cylinder. The valve als o locks oil into both
sides of the cylinder in order to hold the cylinder in
position when the frame leveling system is in HOLD.
Lock Valve (Frame Leveling Cylinder)
Frame Leveling Cylinder
30
6
VIEW ALL CALLOUTS
QUICK COUPLER CYLINDER
The quick coupler cylinder is located in the
hydraulically
operated quick coupler.
The hydraulic quick coupler allows the operator to
change the wor
k tools on the quick coupler without
leaving the cab.
The rods of the
quick coupler cylinder serve as pins.
The rods extend o ut of the cylinder in order to engage
the wo rk tool that is attached to the quick coupler and
the rods retr
act into the cylinder in order to disengage
the work tool that is attached to the quick coupler.
21
4
VIEW ALL CALLOUTS
TRAILER AND TOWING HITCH HYDRAULIC
SYSTEM (OPTION)
The hydraulic system for the trailer and the towing
hitch contains the following items: towing Hitch
Group, electrically controlled Combination Valve
Group, hitch control Cable Group, trailer socket,
additional oil lines, and control switch that is
mounted in the cab.
Towing Hitch Group.
Combination Valve Group
Towing Hitch Group
Combination Valve Group is mounted to the rear
of the frame. The oil lines attach to the outlet manifold
of the main control valve. The oil lines route pressure
oil, load sensing oil, and return oil to the combination
valve.
The Towing Group is mounted to the rear frame.
Hitch control Cable Group moves the hooks that
release the hitch. A cylinder, that is located inside
the Towing Hitch Group, lowers the hitch when the
operator activates the control switch that is located
inside the cab. The cylinder also raises the hitch
when the operator activates the control switch in the
opposite direction.
The brake oil for the trailer is supplied by an oil line
that is connected to the front axle brake.
22
22
VIEW ALL CALLOUTS
VALVE AND MTG GP - DIVERTER (DUAL AUXILIARY)
VIEW OF AREA A
A
Quick Coulper Sol.
Auxiliary Diverter Sol.
27
16
VIEW ALL CALLOUTS
VALVE GP - BANK 4 (IMPLEMENT)
Valve Gp - Implement Asy 4-Bank (15),
Main Pump Pressure Port (AA),
Load Sensor Pressure Port (BB),
Implement Pilot Pressure Port (CC)
Inlet
Manifold
Outlet
Manifold
Inlet
Manifold
Outlet
Manifold
Boom
Tele
Auxiliary
Tilt
Location of
Implement Disable Sol.
CC
BB
BB
AA
28
18
VIEW ALL CALLOUTS
VALVE GP - DIVERTER (SINGLE AUXILIARY)
VIEW B-B
B
B
Quick Coulper Sol.
27
VIEW ALL CALLOUTS
