Lukas PO-4 - Manual (Page 4)

4
5 Safety instructions for hydraulic hoses
All instructions to safe use of hydraulic hoses can be found in the booklet HR 1495 35 219 delivered
with the hoses.
Device-specific information
Ensure the correct power supply acc. to the motor data on the nameplate. If external devices with
operating pressures < 50/70 MPa (500/700 bar) are connected, they may be damaged.
Used oil must be disposed of at a used oil disposal station to avoid environmental pollution.
6 Applications
LUKAS hydraulic power packs are exclusively designed for the operation of LUKAS hydraulic
cylinders.
Function diagram
FIG6.TIF FIG7.TIF FIG8.TIF
Type PO4-4-N3 Type PO4-4-N4
PONA4.Tif fig. 1
6.1.1.2 Connection
Screw hose nipple into connection A (10) at drain valve (12) (see fig. 10).
Remark
Hose nipples and hoses are not part of the power pack's scope of supply and can be obtained from
LUKAS.
6.1 Single-acting cylinders
6.1.1 Power pack type PO4-4-NA-500 and PO4-4-NA-700
Type NA is equipped with a 2/2-way valve and can be used with
single-acting cylinders (see function diagram).
6.1.1.1 Operation (see fig. 1)
If the 2/2-way valve is closed (valve grip in position I), the cylinder
can extend with the pump switched on.
The pressure maintaining function is achieved by switching off
the motor.
If the valve is opened (valve grip in position II) the piston side is
connected with the oil tank and the cylinder can retract by means
of a return spring.
Type PO4-4-NA