User Manual

Hydraulic System VARIANT 260/280 TIC
56 var-h 11/04
Tensioning the belts 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. Otherwise there is a risk of the belts being
squeezed.
- with active pressure
control
The oil displaced from the ram spaces during this process flows into the
tank via non-return valve (732-3), shut-off tap (627) and port (801-2 A).
The pressure relief valve (754) is mechanically blocked = no function.
Swinging in the knife
support
When actuating the "Swing in knife support" button, the 2/3 way
directional control valve (Y55) "ROTOCUT knives IN" is energized.
Oil flows into the ROTOCUT knives hydraulic cylinders (336) via port
(801-1) and the energized 2/3 way valve. The ROTOCUT knives hydraulic
cylinders (336) extend and swing in the knife support.
The extended ROTOCUT knives hydraulic cylinders (336) are kept in thei
r
position by the non-return valve inside the 2/3 directional control valve
(Y54).
Swinging out the knife
support
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.
The baled material loads the ROTOCUT knives hydraulic cylinders (336),
making oil flow into the tank from the ram spaces via the energized 2/3
way valve (Y54), the unenergized 2/3 way valve (Y55) and port (801-1).