Würth 1952 004 020 Traducción Del Manual De Instrucciones De Servicio Original página 9

TABLE A
Temperature range
Recommended fluid viscosity
INSTALLATION
Make the hydraulic connections using a pump with a discharge
valve (or a three-way valve) and a hose for high pressure.
Tighten completely by hand all the couplers (quick-connect
coupling). The connections of loose couplers will block the flow of
oil between the pump and the cylinder.
Bleed air from the cylinder. Place the cylinder in such a way that the
rod is directed downwards and that the cylinder is lower than the
pump. Extend the piston completely and then return it several times,
until the operation is smooth.
WARNING: Some couplers (of the hose or the
pump) require that the cylinder is used no more
than 50% of its calculated capacity. Refer to the
instructions of the accessories (hose and pump)
for additional information.
Notes:
Do not allow the rod to rotate during the adapter
installation. The rotation of the piston can damage
the internal seal gaskets and the return spring of
the rod.
OPERATION
Operate the hydraulic pump to move the rod forward.
Operate the valve (exhaust pressure of the pump) to push back
the rod. These cylinders are single acting with spring return. The
return speed is affected by the length of the hose for high pressure
and other constrictions in the line. The stop ring of the cylinder is
designed to support the full load. However, to reduce the cylinder
wear, use a stroke and a pressure lower than the total ones, where
possible.
DANGER:
• Never try to release hydraulic pressure by
loosening a coupler!
• Never try to tamper with the balls of the coupler
to release residual pressure trapped in the
cylinder with the tube removed!
MAINTENANCE
WÜRTH hydraulic cylinders do not require special maintenance, but
it is advisable to still consider some aspects to prolong its life:
• If in case of replacement, always use hydraulic oil that meets
the specifications listed in Table A;
• Always use the dustproof cap (supplied) when the cylinder is
disconnected from the tube;
• When not in use, always keep the cylinder in places free of
dust to prolong its life;
20 Ton
-10°C ÷ 65°C
15÷100 mm²/s
• Store the cylinder with the rod fully retracted to prevent the
attack of external chemical agents which can compromise the
smoothness and the seal;
• Always check the oil leaks from the rod and between the
cylinder and the coupler.
• In case of o-rings replacement, the cylinder must be repaired
by skilled staff with technical experience.
STORAGE
In case of outdoor storage, make sure that the cylinder is protected
from water.
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