User Manual
Table Of Contents
- Hydraulic System Variant 260/280
- Contents
- Chapter 1 Overall hydraulic system circuit diagram
- Chapter 2 Function
- Chapter 3 Valve components
- 3.1 Main valve block – without active hydraulic system Hydraulic circuit diagram
- 3.2 Baling chamber service shut-off valve – without active hydraulic system
- 3.3 Lock-up valve unit (734)
- 3.4 Pressure relief valve (754), Baling pressure build-up solenoid valve (Y50) without active hydraulic system
- 3.5 Flow controllers (755, 756)
- 3.6 Rotor cut-out clutch Shut-off tap (627)
- 3.7 ROTO CUT knife support IN/OUT solenoid valve (Y54/Y55)
- 3.8 Main valve block – with active hydraulic system
- Index
- 0299 256.1
TIC VARIANT 260/280 Hydraulic System
11/04 var-h 51
Key to diagram:
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.
The pilot spool of the 2/3-way valve opens the ball so the volume flow
flows to the 2/3-way valve (Y54).
The ball of the 2/3-way valve (Y54) is opened by pressure build-up.
The volume flow flows via port (A) to the hydraulic cylinders which swing
in the knife support.
Knife support OFF The tractor control unit is set to floating position.
The solenoid of the 2/3-way valve (Y54) is actuated.
The pilot spool of the 2/3-way valve (Y54) opens the ball. Since the knife
support hydraulic cylinders are loaded by the baled material, volume
flow flows via port (A) and via the open ball of the 2/3-way valve (Y54) to
the 2/3-way valve (Y55). The volume flow flows via the non-return valve
(V) to port (P) and further to the tractor (tank).
Note: When disassembling or replacing a valve insert, the sealing ring
must always be replaced, too.
Rubber-coated aluminium ring for aluminium valve bodies,
copper ring for steel valve bodies.
The rubber-coated aluminium ring cannot be replaced by a
copper ring and vice versa.