Claas CORTO 250, Service Parts

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Hydraulic / Electric System CORTO 8100 F/T TIC
3-4 10/04
1.1.2 Function
CORTO 8100 F
Moving the mower units to transport position
1 Shut down the side-mounted mower units using switches (2) and (3).
Shut down the main drive The mower drums must stand still. (Solenoid
valves 70 and 71 switch).
2 Raise front attachment completely until the mower units are clear of the
ground.
3 Slightly raise the side-mounted mower units using switches (5) and (6).
(Solenoid valves 50A, 75 and 76 switch).
4 Actuate the fold-in switch (4). The solenoid valves (50A) and (74) switch.
Oil flows to the hydraulic cylinders (95). The centre mower unit is raised.
Oil pressure switch (94) closes at 30 bar. The lock-up valve units (89 and
99) are closed by electro-magnetic means. The oil in the hydraulic
cylinders (90 and 100) is thus locked.
At a pressure of 160 bar, the oil pressure switch (93) actuates the
solenoid valves (72 and 73). Oil flows to the hydraulic cylinders (91 and
92). The hydraulic cylinders retract.
Consequently the side-mounted mower units are folded to the front, i.e. to
transport position. The displaced oil flows back to the tank via the
solenoid valves (72 and 50B).
5 Fit the transport lock (lighting bracket) and connect the lighting system.
6 Fully raise the side-mounted mower units using switches (5) and (6). The
solenoid valves 50 A, 75 and 76 switch.
Oil flows to the hydraulic cylinders (82 and 85). At 80 bar, the oil pressure
switch (79) and the solenoid valve (74) switch.
The oil in the hydraulic cylinders (95) flows back to the tank.
The centre mower unit is lowered onto the folded-in side-mounted mower
units.
Remark: The double-acting pressure relief valve (80) serves for accident
prevention.
When folding in, the mower units can be stopped manually.
The pressure relief valve (80) opens at 100 bar. Personal injury is thus
avoided. The oil displaced by pressure relief valve (80) flows back to the
tank.