Claas CORTO 250, Service Parts

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Hydraulic System VOLTO TIC
5-10 10/04
4.0 VOLTO 1050 T hydraulic system
Item Designation Remark
1 Hydraulic cylinders Actuate the outer arms
2a Hydraulic cylinder On the right-hand side arm
2b Hydraulic cylinder On the left-hand side arm
3 Hydraulic cylinders On the longitudinal beam
4 Hydraulic cylinders Chassis
5 Stroke limiting valve Is actuated mechanically by the outer arms. Closed in working position
and open in transport position.
6 Pressure sequence valve After the end of the stroke of hydraulic cylinders (2) and a pressure rise
to 130 bar, the hydraulic cylinders (3) are retracted via the pressure
sequence valve.
7 Block-type ball valve Is actuated by a rope. Open in working position, closed in transport
position.
8 Stroke limiting valve is closed after hydraulic cylinders (3) have started retracting.
9 Block-type ball valve Closed in working position, open in transport position.
10 Block-type ball valve Closed in working position, open in transport position.
11 Flow divider Distributes the volume flow evenly to the hydraulic cylinders (2a) and
(2b)
12 Flow divider
13 Lock-up valve unit
14 Port Double-acting control unit on the tractor (pressure port)
15 Port Double-acting control unit on the tractor (tank port)
16 Port Single-acting control unit on the tractor
DW double-acting
EW single-acting
Working position
(single-acting) When in working position, the hydraulic cylinders (2) are directly controlled
by the single-acting additional control unit (EW) on the tractor.
The volume flow here enters at port (16).
Raising/lowering the
chassis
(single-acting and rope) •
Open the block-type ball valves (9 and 10) using the red rope.
•
Actuate the single-acting additional control unit of the tractor so that
the volume flow flows via port (16).
•
The volume flow flows into the hydraulic cylinders (4) via flow divider
(11) and the block-type ball valves (10 and 9) - the chassis is raised.
•
To lower the chassis, the single-acting additional control unit of the
tractor must be set to the other switching position.