horsch LEEB 4 LT, Operating Instructions Manual

Page: 112 / 162

8.8 Troubleshooting
WARNING
Danger of crushing, shearing, cutting, cutting off, being caught, winding up, being pulled
in and impact caused by
¾
accidental lowering of lifted, unsecured machine parts.
¾
accidental starting and unintended rolling of the tractor/machine combination.
Secure the tractor combination against unintended starting and accidental rolling away before
faults on the machine can be rectified. Wait until the machine has come to a halt before entering
the danger zone.
Malfunction Cause Remedy
The pump does not
prime.
Blockage in the suction side
(suction hose) / fitting
Remove the blockage.
Pump draws in air. Check the hose connection on the
suction hose for leakage.
Pump does not generate
any power.
Jammed or damaged ball
valves.
Replace the ball valves.
Pump draws in air, noticeable
air bubbles in the spraying
mixture tank.
Check the hose connections on the
suction hose for leak tightness.
Wobbling of the spraying
cone
Irregular fluid flow from the
pump.
Check valves on suction and pres-
sure side, replace if necessary.
The required and en-
tered application quan-
tity is not reached.
High travel speed; low pump
drive speed
Clogged nozzles / nozzle filter
or suction filter / pressure filter
Reduce the travel speed and in-
crease the pump drive speed, until
both the error message and the
audible warning disappear.
Clean nozzles / nozzle filters. For this
purpose unscrew the nozzles and
blow them out with a compressed air
gun (on the boom middle section). In
case of frequent appearance check
the suction filter / pressure filter.
The permitted spraying
pressure range of the
installed spraying noz-
zles is not complied with.
Change the specified travel
speed which affects the spray -
ing pressure.
Change the travel speed to reach
the travel speed range that has been
determined for spraying operation.
The spraying value does
not correspond with the
nominal value.
Spraying pressure too low
•
Clean the filter.
•
Increase the engine speed.
Main cleaning process
stops at internal cleaning.
Manual switch-over ball valve
internal/outside cleaning set to
outside cleaning.
Switch valve to internal cleaning.
112 MF