Changing Of Ball Seat In Operating Unit; Check Of Valve Cone In Distribution Valves - Hardi LZ Series Instruction Book

Changing of ball seat in operating unit

If problems with on/off valve occurs (e.g. dripping nozzles when on/off
valve is closed), the ball and ball seat should be checked.
Remove the 2 bolts
fixing the on/off-
pressure valve unit
to the bracket,
unscrew the union
nut A and pull the
on/off-pressure
valve away from the
distribution valves.
Check the ball for sharp edges and scratches and check the ball seat
for cracks and wear - replace if necessary.

Check of valve cone in distribution valves

Periodically check the distribution valves for proper sealing.
Run the sprayer with clean water and
open on/off and all distribution valves.
Cautiously remove clip A and hose B for
the pressure equalization device. When
the housing is drained, there should be
no liquid flow through the pressure
equalization device. If there is any
leakage, the valve cone E must be
changed.
Remove the clip C, and lift the EC motor
off the valve housing. Then unscrew the
screw D and replace the valve cone E.
Reassemble in opposite sequence.
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