©
2001 Caterpillar
All Rights Reserved
Printed in U.S.A.
RENR3443
July 2001
TH62, TH63, TH82 & TH83 Telehandler
Type A Control Arrangements
3LN641 - Up
4TM892 - 4013
3NN509 - Up
5WM918 - 6020
3KN434 - Up
3JN502 - 1509
3RN550 - 4014
Hydraulic System for Type 1, Type 3 or
Introduction
This publication shows the hydraulic system schematics for machines equipped with either of the films illustrated
below for the joystick control. For full details of the joystick control arrangements refer to Operation and
Maintenance Manual SEBU6865 or SEBU7112.
Early type of joystick controls have a straight handle, with a pushbutton switch on the front and a rocker switch on
the top. Later type of joystick controls have curved handles with pushbutton switches on the front and rear, and a
rocker switch on top. The hydraulic valve section of the joystick control is the SAME on both types.
Compare the film for the joystick control located in the machine cab with the flim illustrations above to determine
if these schematics apply to your machine. If the film for the joystick control on the machine you are operating is
not shown above, refer to Hydraulic Schematic Form No. RENR3444.
140-7909 Film (Boom Control). Installed on
machines equipped with a later type of joystick
control.
139-0038 Film (Boom Control). Installed on
machines equipped with an early type of joystick
control.
TH62 and TH82 Machines
Telescoping cylinder (10) is equipped with a single
element lock valve (11A) which blocks the piston side
in the hold position.
The spool in the implement section for boom extend/
retract (23A) of bank valve (20) blocks the work port for
rod side of the telescoping cylinder when it is in the
center position.
TH63 and TH83 Machines
TH62 and TH82 Machines (Early)
TH63 and TH83 Machines (Early)
Telecoping cylinder (10) is equipped with a dual
element lock valve (11) which blocks the rod and
piston sides in the hold position.
The spool in the implement section for boom extend/
retract (23B) of bank valve (20) connects both work
ports for the telescoping cylinder together and to tank
when in the center position.
All Machines (Early)
The spools in the implement section for the boom
raise/lower (22A) of bank valve (20) connects both
work ports for the boom cylinder together and to tank
when in the center position.
All Machines (Later)
The spools in the implement section for boom raise/
lower (22) and the implement section for boom
extend/retract (23) of the bank valve block the flow of
oil to tank when in the center position.
TH62 Machines
Frame leveling is not an option on these machines.
TH62 machines can be equipped with an optional
powered tow hitch attachment which is raised and
lowered by a cylinder. This attachment uses control
valve (54), and the same instrument panel switch and
circuits as frame leveling.
TH62, TH63, TH82 and TH83 Machines
Valve (12) for the compensating cylinders is mounted
on the rear axle on TH63 and TH83 machines. The
valve is mounted on the right side front of the
machine frame on TH62 and TH82 machines.
TH62, TH63, TH82 and TH83 Machines
On machines equipped with a first type brake system,
the brake cylinder (master) (33A), located in the front
of the cab, is connected to the pilot hydraulic system.
On machines equipped with a second type brake
system, the brake cylinder (boost) (33), located in the
machine frame is connected to the pilot hydraulic
system.
1 Front Steering Cylinder A1 A1 -
2 Selector Valve (steering mode) A2 A2 -
3 Rear Steering Cylinder A2 A2 -
4 Compensating Cylinder A3 A3 -
5 Work Tool Cylinder (if equipped) A8 A10 -
6 Load Control Valve for Work Tool Cylinder (if equipped) A8 A10 -
7 Boom Cylinder (boom raise/lower) C3 C3 -
8 Load Control Valve for Boom Cylinder C3 C3 -
9 Compensating Cylinder B5 B5 -
10 Telescoping Cylinder B5 B5 -
11 Load Control Valve for Telescoping Cylinder (TH63 & TH83) B5 B5 -
11A Load Control Valve for Telescoping Cylinder (TH62 & TH82) A10 - -
12 Valve (compensating cylinders) B8 C6 -
13 Load Control Valve for Tilt Cylinder B8 A8 -
14 Tilt Cylinder B9 A9 -
15 Couplers (quick disconnect) B10 B11 -
16 Oil Filter C1 C1 -
17 Relief Valves (auxiliary services) (part of item 20) C6 C6 A4
18 Load Control Valve for the Frame Leveling Cylinder (if equipped) C10 C10 -
19 Frame Leveling Cylinder (if equipped) C11 C11 -
20 Bank Valve D2 D2 A2/F3/I2
21 Inlet Section E2 E2 C1
22 Implement Section (boom raise/lower) (closed center spool) E4 E4 D1
22A Implement Section (boom raise/lower) (open center spool) C10 - -
23 Implement Section (boom extend/retract) (closed center spool) E5 E5 D2
23A Implement Section (boom extend/retract) (closed center spool) TH62 & TH82 C9 - -
23B Implement Section (boom extend/retract) (open center spool) TH63 & TH83 C10 - -
24 Implement Section (coupler tilt) E5 E5 D3
25 Implement Section (auxiliary services) E6 E6 D4
26 Signal Relief Valve E6 E8 B6/G3/J2
27 Pressure Reducing Valve E7 E8 C6/H3/K2
28 Differential Lock Cylinder E8 E8 -
29 Control Valve for Frame Leveling (if equipped) (closed center spool) E10 D11 -
29A Control Valve for Frame Leveling (if equipped) (open center spool) D11 - -
30 Control Valve E6 E6 -
31 Solenoid Valves (pilot control system) E6 E6 -
32 Solenoid Valve (differential lock) E7 E7 -
33 Brake Cylinder (boost) (second type system) F11 F11 -
33A Brake Cylinder (master) (first type system) F11 F11 -
34 Metering Pump (steering) F3 F3 -
35 Piston Pump F3 F3 -
36 Joystick Control F11 F11 E1
37 Hydraulic Tank H2 H2 -
38 Valve for quick coupler (disengage pins) - B8 -
39 Load Control Valve for Coupler Cylinder - B9 -
40 Coupler Cylinder - C10 -
Component
Item No.
Component Description
Schematic Location
Component Location Table
Separate schematics in this publication are identified as Schematic 1, Schematic 2 and Schematic 3. Components
common to all schematics have the same item number. In Schematic 3, some item numbers are shown in boxes at the
end of some of the hydraulic lines. This provides a reference to the component on Schematic 1 and Schematic 2 that
connects to these lines. The schematics have borders and grids to locate the components. Identify both the cross
reference and the number on the schematic from the following table.
No. 3
No. 2
No. 1
1
2 3
4
5
6
7 8
1
2 3 4
5
6
7 8
A
B
C
D
E
F
G
H
I
J
K
A
B
C
D
E
F
G
H
I
J
K
21
23
22
24 25
26
27
36
29
17
BL
JBL
BR
JBR
TL
JTL
JTR
TR
T
JS
PT
SCHEMATIC 3
35 35
16
34
8
11
20
12
15,41 44
44
29 29
34
42
43
46
47
48
49
50
51
52
37
53
TH63 AND TH83 ACCESS PLATFORM TYPE 1, TYPE 3 OR TYPE A CONTROL ARRANGEMENTS
A2
P2
A1
P1 B2
B1
X1
X2
T
Y
27
28
37
33
TH62 HYDRAULIC TOW HITCH/DIVERTER
TH62 HYDRAULIC TOW HITCH, TIPPING VALVE AND TRAILER BRAKING
26
27
P2
P1
26
27
TO TRAILER BRAKES
TIP TOWB
TOWA
BR
LS2
LS1
MC
20
30
54
55
56
56
58
57
30
20
1
2
3
4
37
41 Diverter Valve - C11 -
42 Implement Section for Stabilizer (if equipped) (part of item 20) - E6 D4
43 Implement Section for Stabilizer (if equipped) (part of item 20) - E7 D5
44 Load Control Valves for Stabilizer Cylinders (if equipped) - E10 -
45 Stabilizer Cylinders (if equipped) - F10 -
46 Control Valve (access platform - if equipped) - - A8
47 Solenoid Valve (boom lower) - - A8
48 Solenoid Valve (boom raise) - - A8
49 Solenoid Valve (boom retract) - - B8
50 Solenoid Valve (boom extend) - - B8
51 Solenoid Valve (boom Speed) - - B8
52 Solenoid Valve (on/off) - - C8
53 Control Valve (lockout - if equipped) - - E2
54 Control Valve for Tow Hitch (if equipped) TH62 Only - - F4
55 Diverter Valve for Tow Hitch (if equipped) TH62 Only - - H6
56 Tow Hitch Cylinder (if equipped) TH62 Only - - H8/K7
57 Valve for Tow Hitch/ Tip/Trailer Braking (if equipped) TH62 Only - - J3
58 Couplers (quick disconnect - if equipped) TH62 Only - - K3
Component Location Table (Continued)
Component Description
Schematic Location
Component
Item No.
No. 1 No. 2 No. 3
Component Location Illustration
11, 11A 10 4, 9
8
7
18, 19
14 13
5, 6
55, 56
38 28 44,45 39,4037
15, 41
3
30-32, 53 17, 20-27, 42, 43
29, 29A, 54, 57
35
2
1
34
33
46-52
58
12 (TH63 & TH83)
12 (TH62, TH82)
36
33A
16
A
B
C
D
E
F
G
H
1 2 3 4 5 6
7
8 9
10
11
H
G
F
E
D
C
B
A
11
10
98
7
654321
H
G
F
E
D
C
B
A
11
10
98
7
654321
H
G
F
E
D
C
B
A
11
10
98
7
654321
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
20
17
18
19
21
22
23
24
25
26
27
29
11A
29A
23A
22A/23B
1
2 3
4
13
14
7
8
9
10
11
12
15
19
1817
29
16
20
21
22
23 24
25
26
27
6
5
A2
B2
P2
B1
A1
P1
X1
X2
Y
T
1
2
3
4
28
SCHEMATIC 1
SCHEMATIC 2
1
2
3
4
28
30
31
32
34
35
36
37
38
39
40
41
42
43
44
45
34
35
37
36
33,33A
33,33A
BASIC MACHINES EQUIPPED WITH TYPE 1, TYPE 3 OR TYPE A CONTROL ARRANGEMENTS
MACHINES EQUIPPED WITH STABILIZERS, TWO AUXILIARY HYDRAULIC SERVICES
AND TYPE 1, TYPE 3 OR TYPE A CONTROL ARRANGEMENTS
A2
B2
P2
B1
A1
P1
X1
X2
Y
T
30
31
32
