Lukas Concrete crushers - Manual (Page 30)

30
10.2.5 Replacing the hydraulic fluid
- Change the hydraulic fluid after approximately 500 operating hours, and every two years
at the latest.
- It must always be changed whenever the hydraulic fluid for the accompanying pump
(motor / hand pump) is changed. This prevents the fresh fluid from being contaminated by
the used fluid from the recycling unit.
Procedure:
1. Close crusher arms (until the tips are almost touching).
2. Change the hydraulic fluid of the pump. Please observe the separate operating instructions
for the pump being used!
3. Screw off the return hose on the pump:
- when the hose connection is via mono-coupling to the pump:
remove the cover from the mono-coupling (male).
completely unscrew the connection nut of the blue return hose on the mono-coupling
(male).
- when the hose connection is via quick-connect-coupling to the pump:
Release the union nut on the hose completely from the plug connector nipple on the
blue return flow line.
4. Put the return hose into a separate collecting basin for the hydraulic fluid still in the
equipment.
5. Slowly open the crusher arms on the tool (the pump must be working during this time).
The old hydraulic fluid from the ring space side runs via the return hose into the separate
collecting basin, and must be disposed of in the same manner as the old hydraulic fluid
from the pump.
6. Switch the pump off (motor pump) / no longer activate it (e.g. hand pump).
7. Reconnect the return hose to the pump:
- when the hose connection is via mono-coupling to the pump:
screw the connection nut of the blue return hose back onto the mono-coupling (male).
(Please observe the necessary torque of M
A
= 40 Nm!)
Pull back the cover on the couplings as far as the limit stop.
- when the hose connection is via quick-connect-coupling to the pump:
Screw the union nut on the hose on the plug connector nipple on the blue return flow line.
(Please observe the necessary torque of M
A
= 35 Nm!)
8. De-aerate the recycling unit as described in the chapter “Preparatory measures”.