Claas CORTO 250, Service Parts

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Hydraulic / Electric System JAGUAR 8550C TIC
1-10 10/04
Step Action Reaction
1 If e.g. the right mower unit hits an
obstacle. The pressure in rod space of cylinder 85 rises.
2 When the pressure reaches
180 bar, the pressure relief valve 86 opens.
3 Volume flow is displaced from the
rod space of cylinder 85. This volume flow goes to the rod space of cylinder 90. The
right mower unit is raised and folds in.
1.2.2 Raising the entire
mower unit
Step Action Reaction
1 The “Raise front attachment”
button on the forage harvester is
pressed. Via the 3/3 way solenoid valve of the jaguar (line 106),
volume flow goes to the ram rod end of lifting cylinders
(110).
2 The mower unit is raised. When a pressure of 85 bar is reached while raising, the
pressure switch 94 (normally open contact) switches.
3 The relays 12 and 15 now cut the
power supply to the lock-up valve
units 89, 99 and 109. The lock-up valve units are closed. This is required to keep
all mower units raised while raising the overall mower unit.
(The oil does not flow into the accumulators 88, 98 and
102.)
4 The volume flow displaced from the
rod spaces of the cylinders (on the
forage harvester) is fed to the
cylinders 90 and 100. The cylinders 90 and 100 retract and thus raise the left and
right mower units.
5 When the volume capacity of the
rod spaces of cylinders 90 and 100
is exhausted, the pressure rises and the pressure switches 96 switch the
lock-up valve units 89 and 99 so that the excess volume
flow is displaced into the accumulators 88 and 98. This
ensures that no oil will escape from this circuit.
1.2.3 Starting protection