VARIANT 260/280 Technical Systems Hydraulic System
Hydraulic System 2 VARIANT 260/280 TIC var-h 11/04
TIC VARIANT 260/280 Hydraulic System Hydraulic system Contents Chapter 1 Overall hydraulic system circuit diagram.............................5 Chapter 2 Function .................................................................................15 Chapter 3 Valve components.................................................................29 Index .........................................................................................................
Hydraulic System 4 VARIANT 260/280 TIC var-h 11/04
TIC VARIANT 260/280 Hydraulic System Chapter 1 Overall hydraulic system circuit diagram 11/04 1.1 Circuit diagram – without active hydraulic system.............................6 1.2 Circuit diagram – with active hydraulic system, with integrated pressure holding valve (754) up to serial no. … .....10 1.3 Circuit diagram – with active hydraulic system, without integrated pressure holding valve (754) from serial no. .....
Hydraulic System 1.
TIC VARIANT 260/280 Hydraulic System Key to diagram: 6 Valve block 102-1 Filter (option) When factory-mounted, filter (102-2) is not provided - in this case, a hydraulic loop line is installed here. In case of retrofits, filter (102-2) remains in place. 102-2 Filter (series equipment) 232 Lubricating oil pump is actuated when building up pressure for opening the tailgate.
Hydraulic System VARIANT 260/280 TIC 722-1 Anti-cavitation valve opening pressure 3.6 bar 722-2 Anti-cavitation valve opening pressure 3.6 bar 722-3 Anti-cavitation valve opening pressure 3.6 bar 731-1 Non-return valve 731-2 Non-return valve 731-3 Non-return valve 731-4 Non-return valve shuts off the pre-pressurizing circuit against the filter circuit. 734-1 Non-return valves lock-up valve unit 734-2 shut off the tailgate cylinders (318), the rotor cut-out clutch (338) and the drive clutch (370).
TIC VARIANT 260/280 Hydraulic System Notes: 11/04 var-h 9
Hydraulic System 1.2 10 VARIANT 260/280 TIC Circuit diagram – with active hydraulic system, with integrated pressure holding valve (754) up to serial no.
TIC VARIANT 260/280 Hydraulic System Key to diagram: 6 102-1 102-2 232 318-1 318-2 331 336 338 345 346-1 346-2 370 410 513 626-C 626-D 626-E 627 722-1 722-2 722-3 732-1 732-2 732-3 732-4 732-5 732-6 734-1 734-2 753-1, -2 754 755 756 801-1 912 Y50 Y54 Y55 Valve block Filter (option) Filter Lubricating oil pump Tailgate left hydraulic cylinder Tailgate right hydraulic cylinder Pick-up hydraulic cylinder Knife support hydraulic cylinder Rotor cut-out clutch Top right tensioning arm hydraulic cylinder Bott
Hydraulic System 1.3 12 VARIANT 260/280 TIC Circuit diagram – with active hydraulic system, without integrated pressure holding valve (754) from serial no. ...
TIC VARIANT 260/280 Hydraulic System Key to diagram: 6 102-1 102-2 232 318-1 318-2 331 336 338 345 346-1 346-2 370 410 513 626-C 626-D 626-E 627 722-1 722-2 722-3 732-1 732-2 732-3 732-4 732-5 732-6 734-1 734-2 753-1, -2 755 756 801-1 912 Y50 Y54 Y55 Valve block Filter (option) Filter Lubricating oil pump Tailgate left hydraulic cylinder Tailgate right hydraulic cylinder Pick-up hydraulic cylinder Knife support hydraulic cylinder Rotor cut-out clutch Top right tensioning arm hydraulic cylinder Bottom l
Hydraulic System 14 VARIANT 260/280 TIC var-h 11/04
TIC VARIANT 260/280 Hydraulic System Chapter 2 Function 11/04 2.1 Function – without active hydraulic system .....................................16 2.2 Function – with active hydraulic system, with integrated pressure holding valve (754) up to serial no. ... ......20 2.3 Function – with active hydraulic system, without integrated pressure holding valve (754) from serial no.......
Hydraulic System 2.
TIC VARIANT 260/280 Hydraulic System Description of function: Close tailgate Volume flow enters the valve block (6, port T) via port (801-2 B) and flows to the lock-up valve unit non-return valve (734-1). The lock-up valve unit is opened. Pressurized oil flows into the rod spaces of hydraulic cylinders (318-1 and 318-2) via the opened lock-up valve unit non-return valve (734-1) and port D.
Hydraulic System Relieving the belts during maintenance work in the baling chamber VARIANT 260/280 - TIC Switch on control box (baler CCT) so the baling pressure build-up solenoid valve (Y50) is energized. Disengage the p.t.o. shaft. Open the tailgate as far as necessary and secure it. Actuate the baling chamber service shut-off valve (626): The shut-off taps (626 C) and (626 D) of the tailgate are now shut off and the shut-off tap (626 E) is open.
TIC Swinging out the knife support 11/04 VARIANT 260/280 Hydraulic System The single-acting tractor control unit is set to the "Lower" position – port (801-1) is connected to the tank. When actuating the "Swing out knife support" button, the 2/3 way directional control valve (Y54) is energized.
Hydraulic System 2.2 20 VARIANT 260/280 TIC Function – with active hydraulic system, with integrated pressure holding valve (754) up to serial no. ...
TIC VARIANT 260/280 Hydraulic System Description of function: Closing the tailgate – without active pressure control Oil enters the valve block (6, port T) via port (801-2 B) and opens the lock-up valve unit non-return valve (734-1). Via port D, the pressurized oil flows to the non-return valves (732-5 and 732-6) which are unlocked. The pressurized oil flows on into the rod spaces of hydraulic cylinders (318-1 and 318-2). The tailgate is closed.
Hydraulic System VARIANT 260/280 TIC Opening the tailgate – without active pressure control Oil flows into valve block 6 (port P) via port (801-2 A), filter (102-1) and the rotor clutch / 2nd belt drive shut-off tap (627). Oil flows via the open shut-off taps (626C and 626D) into the ram spaces of hydraulic cylinders (318-1 and 318-2), via ports (A and B) and the nonreturn valves (732-5 and 732-6). During this process, the flow rate is regulated to 50 l/min. by the flow controllers (756 and 755).
TIC VARIANT 260/280 Tensioning the belts - with active pressure control Hydraulic System The baling chamber service shut-off valve still is in the "Tailgate blocked" position; now the double-acting control unit provided on the tractor is set to the "Lower" position. The hydraulic cylinders (346-1, 346-2 and 345) are retracted by springs on the left baler side. When maintenance work is complete, the tailgate is closed and the belts must be driven during closing.
Hydraulic System 2.3 24 VARIANT 260/280 TIC Function – with active hydraulic system, without integrated pressure holding valve (754) from serial no.
TIC VARIANT 260/280 Hydraulic System Description of function: Closing the tailgate – without active pressure control Oil enters the valve block (6, port T) via port (801-2 B) and opens the lock-up valve unit non-return valve (734-1). Via port D, the pressurized oil flows to the non-return valves (732-5 and 732-6) which are unlocked. The pressurized oil flows on into the rod spaces of hydraulic cylinders (318-1 and 318-2). The tailgate is closed.
Hydraulic System VARIANT 260/280 TIC Opening the tailgate – without active pressure control Oil flows into valve block 6 (port P) via port (801-2 A), filter (102-1) and the rotor clutch / 2nd belt drive shut-off tap (627). Oil flows via the open shut-off taps (626C and 626D) into the ram spaces of hydraulic cylinders (318-1 and 318-2), via ports (A and B) and the nonreturn valves (732-5 and 732-6). During this process, the flow rate is regulated to 50 l/min. by the flow controllers (756 and 755).
TIC VARIANT 260/280 Tensioning the belts - with active pressure control Hydraulic System The baling chamber service shut-off valve still is in the "Tailgate blocked" position; now the double-acting control unit provided on the tractor is set to the "Lower" position. The hydraulic cylinders (346-1, 346-2 and 345) are retracted by springs on the left baler side. When maintenance work is complete, the tailgate is closed and the belts must be driven during closing.
Hydraulic System 28 VARIANT 260/280 TIC var-h 11/04
TIC VARIANT 260/280 Hydraulic System Chapter 3 Valve components 11/04 3.1 Main valve block – without active hydraulic system ........................30 3.2 Baling chamber service shut-off valve – without active hydraulic system .......................................................34 3.3 Lock-up valve unit (734) ..................................................................38 3.4 Pressure relief valve (754), baling pressure build-up solenoid valve (Y50) – without active hydraulic system ...
Hydraulic System 3.
TIC VARIANT 260/280 Hydraulic System Key to diagram: 6 Valve block 102-2 Filter (series equipment) 626-C Shut-off tap for left-side tailgate cylinder Is combined with 626-D and 626-E. 626-D Shut-off tap for right-side tailgate cylinder. Is combined with 626-C and 626-E. 626-E Shut-off tap for belt tensioner cylinder. Is combined with 626-B and 626-C. blocked when 626-C and 626-D are open. open when 626-C and 626-D are blocked.
Hydraulic System VARIANT 260/280 TIC var-h 11/04 Ports 32
TIC VARIANT 260/280 Hydraulic System Key to diagram: 102-2 Filter (series equipment) A Port To the piston top spaces of the tailgate cylinders A1 Port To the knife support ON/OFF hydraulic cylinders B Port To the piston top space of the tailgate cylinders C Port To the rotor cut-out clutch (338) and drive clutch (370) M Solenoid coil of Baling pressure build-up solenoid valve (Y50) P Port Oil supply from tractor T Port Tank (return to tractor) X Port To the rod spaces of belt tensioner cyl
Hydraulic System 3.
TIC Key to diagram: VARIANT 260/280 626 Hydraulic System Baling chamber service shut-off valve 626-C Left tailgate cylinder shut-off valve 626-D Right tailgate cylinder shut-off valve 626-E Tensioning cylinder shut-off valve Description of function: The bale chamber service shut-off valve 626 is a rotary disc valve with the following valve functions: 626 C for the left tailgate cylinder 626 D for the right tailgate cylinder and 626 E for the belt tensioner cylinders 11/04 var-h 35
Hydraulic System VARIANT 260/280 TIC var-h 11/04 Hand lever position 36
TIC Key to diagram: VARIANT 260/280 626 Baling chamber service shut-off valve I, II Lever positions Hydraulic System Description of function: Position I: The shut-off valves (626 C and 626 D) provide a connection to the tailgate cylinders. The shut-off valve (626 E) has shut off the connection to the tensioning cylinders. Position II: The shut-off valves (626 C and 626 D) have shut off the connection to the tailgate cylinders.
Hydraulic System 3.
TIC Key to diagram: VARIANT 260/280 Hydraulic System 734-1 Lock-up valve unit non-return valve 734-2 Lock-up valve unit non-return valve C Port D Port K Piston P Port T Port Description of function: Lock-up valve unit non-return valve (734-1) Blocks port (D) = to the rod spaces of tailgate cylinders (318-1 and 318-2). Lock-up valve unit non-return valve (734-2) Blocks port (C) = to the rotor cut-out clutch (338) and the drive clutch (370).
Hydraulic System 3.
TIC Key to diagram: VARIANT 260/280 Hydraulic System 102-2 Filter 731-4 Non-return valve 754 Pressure relief valve E Port M Solenoid coil Y50 Baling pressure build-up solenoid valve Description of function: Non-return valve (731-4) shuts off the pre-pressurizing circuit against the filter circuit. Pressure relief valve (754) Maintains the pressure in the tensioning arm circuit at 10 bar. Port (E) to the ram spaces of the tensioner cylinders.
Hydraulic System 3.
TIC Key to diagram: VARIANT 260/280 755 Flow controller 756 Flow controller Hydraulic System M P, X Port V Connection Y50 Baling pressure build-up solenoid valve Description of function: Open tailgate: - - Close tailgate: - - Baling pressure build-up solenoid valve (Y50) - 11/04 Volume flow enters via port (P) and flows through flow controller (756) from the spring side; flow controller (756) does not control the flow.
Hydraulic System 3.
TIC Key to diagram: VARIANT 260/280 627 Rotor clutch / 2nd belt drive shut-off valve P, P1 Port KL Connection Hydraulic System Description of function: Port K Connection to rotor cut-out clutch and drive clutch Port P Shut-off tap output = P input into control unit (6) Port P1 Connection to tractor. This port is located on the back side of the shut-off tap.
Hydraulic System Key to diagram: VARIANT 260/280 338 Rotor cut-out clutch 370 Roller 3 drive clutch R Rotor TIC Description of function: When rotor (R) is blocked, the rotor clutch (338) is shut off separately so that the rotor (R) can be rotated by hand.
TIC VARIANT 260/280 Hydraulic System Notes: 11/04 var-h 47
Hydraulic System VARIANT 260/280 TIC var-h 11/04 Design and function 48
TIC Key to diagram: VARIANT 260/280 1 Friction disc 2 Bolts 3, 4 Sprocket 5 U-plate 6 Bolts 7 Port 8 Pressure spring 9 Sprocket Hydraulic System Description of function: Friction disc (1) Ensures rotor rotation while clutch is disengaged. This avoids net damage. Bolts (2) are bolted to the U-shaped sheet metal (5) and connect the sprockets (3 and 4) when the clutch is closed. Sprocket (3) Is welded to sprocket (9).
Hydraulic System 3.
TIC Key to diagram: VARIANT 260/280 Hydraulic System A ROTO CUT knife support IN/OUT hydraulic cylinder port P Tractor port (single-acting control unit) Y54 ROTO CUT knife support OUT solenoid valve Y55 ROTO CUT knife support IN solenoid valve Description of function: Knife support ON Volume flow from the tractor enters via port (P). The ROTO CUT knife support IN solenoid valve (Y55) is energized.
Hydraulic System 3.
TIC Key to diagram: 11/04 VARIANT 260/280 626 732-4 734-1 734-2 755 756 Y50 Shut-off tap Non-return valve Lock-up valve unit (non-return valve) Lock-up valve unit (non-return valve) Flow controller Flow controller Baling pressure solenoid valve A B P T Consumer port Consumer port Pump port Tank port var-h Hydraulic System 53
Hydraulic System VARIANT 260/280 TIC Description of function: Closing the tailgate – without active pressure control Oil enters the valve block (6, port T) via port (801-2 B) and opens the lock-up valve unit non-return valve (734-1). Via port D, the pressurized oil flows to the non-return valves (732-5 and 732-6) which are unlocked. The pressurized oil flows on into the rod spaces of hydraulic cylinders (318-1 and 318-2). The tailgate is closed.
TIC VARIANT 260/280 Hydraulic System Opening the tailgate – without active pressure control Oil flows into valve block 6 (port P) via port (801-2 A), filter (102-1) and the rotor clutch / 2nd belt drive shut-off tap (627). Oil flows via the open shut-off taps (626C and 626D) into the ram spaces of hydraulic cylinders (318-1 and 318-2), via ports (A and B) and the nonreturn valves (732-5 and 732-6). During this process, the flow rate is regulated to 50 l/min. by the flow controllers (756 and 755).
Hydraulic System Tensioning the belts - with active pressure control VARIANT 260/280 TIC The baling chamber service shut-off valve still is in the "Tailgate blocked" position; now the double-acting control unit provided on the tractor is set to the "Lower" position. The hydraulic cylinders (346-1, 346-2 and 345) are retracted by springs on the left baler side. When maintenance work is complete, the tailgate is closed and the belts must be driven during closing.
Index
Hydraulic System VARIANT 260/280 TIC Index: 58 A Active hydraulic system 10, 12, 20, 24, 53 B Bale chamber Baling pressure build-up 35 40 C Circuit diagram Contents 5, 6, 10, 12 3 D Design 48 F Flow controller Function 42 15, 16, 20, 24, 48 H Hand lever 36 K Knife support 50 L Lock-up valve unit 38 M Main valve block 30, 53 L Overall hydraulic system 5 P Ports Pressure relief valve 33 40 R ROTO CUT Rotor cut-out clutch 50 44 S Shut-off tap Shut-off valve 44 35 V
At CLAAS KGaA mbH we are constantly improving our products to reflect the latest technological developments. For this reason, we may from time to time need to make changes to diagrams and descriptions in this documentation which do not reflect products which have already been delivered and which will not be implemented on these machines. Technical data, dimensions and weights are given as an indication only. Responsibility for errors or omissions not accepted.
CLAAS KGaA mbH Postfach 1163 33426 Harsewinkel Tel. +49 (0)5247 12-0 www.claas.com 0299 256.1 SYS-HY VARIANT 260/280 EN - 03.
