Lukas LH2 - Manual (Page 27)

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11.3 Hydraulic fluid change or adding hydraulic fluid
11.4 Care
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 half year.
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.
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.