Hardi LZ Series, Instruction Book

Page: 32 / 60

32
Fault Probable cause Control / remedy
Hydraulic system
Hydraulic
movements of
boom are fast/
slow/erratic.
Particular ram
not functioning.
Air in system.
Insufficient hydraulic
pressure.
Insufficient amount of
oil in tractor reservoir.
Restrictor blocked.
Loosen ram connections and
activate hydraulics until oil flow has
no air in it (not whitish).
Check output pressure of tractor
hydraulics. Minimum for sprayer is
130 bar.
Check and top up if needed.
Place boom in transport bracket.
Dismantle and clean
Emergency operation of the sprayer
The boom
In case of power failure the boom can be
operated manually by pressing the
individual buttons on the solenoid valves.
This is done by locking the distribution
valve, as is done when using tractors
with closed centre hydraulics.
Remove the protection box of the sole-
noid valves at the boom. The boom can now be operated by pressing
the individual buttons on the solenoid valves.
Remember to reset the
system to open centre
hydraulic, if the tractor
has an open centre
hydraulic system.
The problem may be due
to a blown fuse. One
spare fuse is located
inside the junction box.
Fuse type T 10 A 250 V
HARDI ref. no. 261272