Kverneland ES, Руководство оператора

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Care and maintenance
65
Check the preload
pressure of the
hydraulic release
system [+]
Connect/disconnect the filling hose
Due to the pressure in the hydraulic system, the filling hose cannot be
connected/disconnected directly to/from the tractor. Therefore, a spe
-
cial quick connection is used on the accumulator, which can be con -
nected/disconnected under pressure.
To connect the filling hose.
> first connect the hose to the tractor
> then connect the hose to the accumulator
To disconnect the filling hose.
> first disconnect the hose from the accumulator
> then disconnect the hose from the tractor
The preload pressure is nitrogen in the accumulator when the ram is
in the outermost position. The factory-set preload pressure is 90 bar
(1305.3 psi). This preload pressure may gradually fall over time.
•
Check the preload pressure before and after each plowing season.
•
Put in some nitrogen when the preload pressure falls below 80 bar
(1160.3 psi).
Checking the nitrogen
preload pressure Before checking
> Connect the plow to the tractor
> Place the plow on a firm and level surface
> Support the beams with a wedge under all landsides.
> Remove the dust covers
> First connect the filling hose to the tractor
> Then connect the leading hose to the quick connection on the ac -
cumulator
Checking
> Observe carefully with the manometer
> Carefully open the tractor’s spool valve.The oil pressure will now
be slowly reduced
•
The pressure shown immediately before it falls suddenly is the
preload pressure
\
WARNING
Couple to the tractor and support the beams
When checking, couple the plow to the tractor and place the plow
on firm and level floor. Support the beams with a wedge under the
landsides. Releasing of the pressure may otherwise cause the
beams or the plow to drop down.
Quick connection
slowly
suddenly
preload pressure