Lukas ZPH 3 - Manual (Page 6)

6
12.2 Special function „quick stop“
If you open the drain valve rapidly (rotation to the left), an existent quickstop only for 50 MPa
cylinders StMu61-M (silver) is activated, i.e. a non-return valve, incorporated in the quick-connect
coupling, will prevent the oil from flowing back. While the hose is at zero pressure, the cylinder
remains under pressure. Pump and cylinder can now be separated and the pump can be used
elsewhere.
The "quickstop" also serves as a safety valve if for some reason the hose is damaged. The
quickstop will in this case prevent the load from falling.
In order to release the quickstop, the pressure in the cylinder must be increased with a few pump
slaps. This will re-open the non-return valve in the quick-connect plug StNi 6. The draining can
now be continued.
12.3 Uncoupling pump and cylinder
Before uncoupling the pump from the cylinder, make sure (by opening the drain valve) that there
is no pressure and that the piston is completely retracted.
Remount the protection caps after uncoupling in order to avoid pollution of the coupling parts.
Close the oil reservoir filler cap, so that no oil is spilled during transport.
12.4 Adjustment of the maximum pressure (50 MPa)
or if necessary of a lower pressure
Check adjusted pressure with closed drain valve.
Adjust pressure limiting valve (item 6, see cover page) as follows:
- Unscrew the screw plug 6.1 (SW5), with the hexagonal socket-head wrench
(SW4) adjust the nut 6.2 to the intended pressure.
Note:
Rotation to the right = pressure increase; Rotation to the left = pressure relief.
The pressure can be seen on the connected pressure gauge.
Caution: Observe para 6 of this operating manual!
13 Servicing and Maintenance
Oil should be changed once a year. In case of frequent use or operation in particularly dusty
environment, oil should be changed every six months.
13.1 Adding Oil to the Pump
Warning: Always add oil with cylinders fully retracted (extended if pull cylinders) or the system will
contain more oil than the reservoir can hold.
- Remove vent/fill cap from reservoir.
- Fill reservoir only to level mark shown on pump.
- Remove air from system if necessary. See 8.3. Recheck oil level after removing air.
- Return vent/fill cap to proper position.
- Make sure no dirt gets into the oil reservoir or into the pump, as this will cause malfunction.
- To extend pump life and improve performance, lubricate the beam pin X, cross pin Y and
piston head Z regulary, using roller bearing grease (see cover page).