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.
1 2 SCHEMATIC 3 35 A 35 16 34 8 11 20 3 12 4 15,41 44 17 5 6 44 29 29 29 B C 21 34 D 22 23 1 26 27 24 25 42 43 7 BL JBL BR JBR TL JTL TR JTR T JS 8 46 47 A 48 49 50 B 51 52 C PT 37 D 4 E 36 3 37 F G 2 Y 28 53 T 37 A2 P2 A1 P1 B2 B1 X1 X2 E 27 33 TH63 AND TH83 ACCESS PLATFORM TYPE 1, TYPE 3 OR TYPE A CONTROL ARRANGEMENTS F 20 54 P1 P2 26 G 27 H 30 20 I 56 55 H TH62 HYDRAULIC TOW HITCH/DIVERTER I J K 1 26 57 27 30 58 TO TRAILER BRAKES 2 3 MC J LS1 TIP TOWB TOWA BR LS2 K 56 TH62 HYDRAULIC TOW HITCH, TIPPING VALVE AND TRAILER BRAKING 4 5 6 7 8 RENR3443 July 2001 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. TH62, TH63, TH82 & TH83 Telehandler Hydraulic System for Type 1, Type 3 or Type A Control Arrangements 3LN641 - Up 4TM892 - 4013 3NN509 - Up 5WM918 - 6020 3KN434 - Up 3JN502 - 1509 3RN550 - 4014 139-0038 Film (Boom Control). Installed on machines equipped with an early type of joystick control. 140-7909 Film (Boom Control). Installed on machines equipped with a later type of joystick control. 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. 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. TH63 and TH83 Machines Telecoping cylinder (10) is equipped with a dual element lock valve (11) which blocks the rod and piston sides in the hold position. TH62 and TH82 Machines (Early) 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 (Early) 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. © 2001 Caterpillar All Rights Reserved 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. Printed in U.S.A. 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. Component Item No. Component Description Schematic Location No. 1 No. 2 No. 3 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 Location Table (Continued) Component Item No. Component Description 41 Diverter Valve 42 Implement Section for Stabilizer (if equipped) (part of item 20) 43 Implement Section for Stabilizer (if equipped) (part of item 20) 44 Load Control Valves for Stabilizer Cylinders (if equipped) 45 Stabilizer Cylinders (if equipped) 46 Control Valve (access platform - if equipped) 47 Solenoid Valve (boom lower) 48 Solenoid Valve (boom raise) 49 Solenoid Valve (boom retract) 50 Solenoid Valve (boom extend) 51 Solenoid Valve (boom Speed) 52 Solenoid Valve (on/off) 53 Control Valve (lockout - if equipped) 54 Control Valve for Tow Hitch (if equipped) TH62 Only 55 Diverter Valve for Tow Hitch (if equipped) TH62 Only 56 Tow Hitch Cylinder (if equipped) TH62 Only 57 Valve for Tow Hitch/ Tip/Trailer Braking (if equipped) TH62 Only 58 Couplers (quick disconnect - if equipped) TH62 Only Component Location Illustration 11, 11A 10 4, 9 18, 19 14 13 34 Schematic Location No. 1 - No. 2 C11 E6 E7 E10 F10 - No. 3 D4 D5 A8 A8 A8 B8 B8 B8 C8 E2 F4 H6 H8/K7 J3 K3 58 55, 56 12 (TH63 & TH83) 8 7 33 38 28 37 33A 36 5, 6 44,45 39,40 15, 41 3 1 30-32, 53 46-52 17, 20-27, 42, 43 12 (TH62, TH82) 16 29, 29A, 54, 57 35 2 1 2 3 SCHEMATIC 1 A 1 2 3 4 4 5 6 7 8 9 10 11 6 5 A 11A B C 16 D E F G H 1 7 8 10 9 11 17 13 14 12 23A 15 18 22A/23B B 19 C 20 21 22 23 24 25 26 27 28 30 31 32 D 29A E 29 33,33A 34 35 Y T A2 B2 P2 B1 A1 P1 X1 X2 1 4 2 3 F 36 G 37 2 3 4 5 6 7 8 9 10 BASIC MACHINES EQUIPPED WITH TYPE 1, TYPE 3 OR TYPE A CONTROL ARRANGEMENTS H 11 1 2 3 4 SCHEMATIC 2 A 1 2 3 4 B C 16 D E 7 8 20 21 22 F 34 35 G 5 6 7 10 9 11 12 17 8 9 13 14 39 38 10 5 6 11 A 15 B 40 18 41 19 C 23 24 25 42 30 31 43 26 32 28 27 Y T A2 B2 P2 B1 A1 P1 X1 X2 D 29 44 E 45 1 4 2 3 33,33A F 36 G H 1 37 2 3 4 5 6 7 8 9 10 MACHINES EQUIPPED WITH STABILIZERS, TWO AUXILIARY HYDRAULIC SERVICES AND TYPE 1, TYPE 3 OR TYPE A CONTROL ARRANGEMENTS H 11