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
Summary of Contents for ES
Page 9: ...Safety 9 ...
