Lukas ZPH 3/4 - Manual (Page 16)

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NOTE:
In this test, an idle time of approximately 2 minutes needs to be observed and
the hand pump needs to be reloaded to operating pressure.
The resulting max. operating pressure must not drop by more than 5% after
10 seconds.
A test pressure gauge is available from the LUKAS line of accessories.
Perform an operational check of the hand pump at least once a year; in the case of continuous
use, once every half year.
Operational check
• no suspicious noises,
• tests at maximum load.
Execution:
Place the hand pump on a solid base to operate. Then, connect a test manometer to the
supply hose line. Release the pump lever lock and close the discharge valve. Then, the
pressurisation to operating pressure corresponding to the specification on the identification
plate occurs.
10.3 Changing or topping up the hydraulic fluid
The hydraulic fluid should be changed if dirty at least once a year. When the hand pump is
operated in an especially dusty environment, we recommend changing the fluid at least once
every six months.
ATTENTION!
Add hydraulic fluid only if the hand pump is disconnected from the lines or the
equipment operated with the pump is hydraulically depressurised. Otherwise,
after filling the entire hydraulic system could contain more hydraulic fluid than
the tank can hold.
Procedure:
1. Open the bleed/fill cap on the tank.
2. Add hydraulic fluid until the fluid level comes up to 1-2 cm below the top edge of the oil
tank.
3. Bleed the hand pump as described in the chapter "bleeding the pump".
4. Check the fluid level again and close the tank again at the correct fluid level with the
vent/fill cap on the tank. Should the tank no longer be sufficiently full after bleeding, start
the fill procedure again at item 2.
NOTE:
Should the fluid level in the tank still not be reached after repeated refilling (during
maintenance), we recommend searching for leaks in the hydraulic system.
10.4 Care
If possible, do not store the hand pump in a damp or extremely dusty environment in order
to ensure a long service life. If this is unavoidable, you should perform more frequent
maintenance and/or shield the pump from these effects if possible.
Regularly coat all metal parts with oil to prevent any corrosion.