The return oil filter is on the oil tank, and can have a
clogging indicator. This indicator turns red when needed. In
all other cases (if the filter time is expired or without
clogging indicator), you must follow the general
recommendations for its replacement.
There are other filters on your crane (the pressure-reducer filter (1) on remote-controlled cranes,
and the breathing filter (2) on the oil tank). These filters have no indicator and you must follow the
general recommendations for their replacement.
8.7. Bleeding air from the hydraulic system
Bleed the air from the hydraulic system:
• after changing the hydraulic oil
• after working on the hydraulic system
• if your crane works slowly or jerkily
• if your crane has not been used for a long time
WARNING
Air in the hydraulic system can lead to faults and damage
To bleed the air from the hydraulic system, proceed as follows:
1.
Slowly extend and retract each stabiliser extension to its end position at least two times.
2.
Slowly extend and retract each stabiliser leg to its end position at least two times.
3.
Set stabiliser system in working position and operate the crane out of parked position.
4.
Slew the crane slowly.
• If your crane has a rack-and-pinion slewing system, slew the crane in each direction to the
slewing stop at least twice.
• If your crane has a continuous slewing system, slew at least two complete rotations.
5.
Slowly raise and lower the 1st and the 2nd boom to its end position at least twice.
6.
If the crane is equipped with JIB, slowly raise and lower the JIB at least twice with main boom
system pointing downwards and upwards.
Maintenance and Service
108
HIAB L-HiPro 145/165/195/235
