Troubleshooting - Hardi mercury Operator's Manual

Operational problems
If all of the maintenance operations have been carried out, you should not have any problems with
the sprayer. If there is a breakdown, it is nearly always due to the following factors:
a. Small holes in the pump's suction tube reduce or completely nullify its capacity for suction.
b. If the suction fi lter is clogged up, suction will be made more diffi cult or impossible and the pump
will not work correctly.
c. If the pressure fi lters are clogged up, pressure in the pressure gauge will rise but not so in the
nozzles.
d. Dirt in the valves may impede their complete closure. This will also worsen the pump's perfor-
mance.
e. If the pump has been badly assembled, especially the diaphragm lids (diaphragm pump) or the
suction chamber (piston pump), air will be sucked in and the pump's capacity will be reduced or
nullifi ed.
f. If some of the electrical components are dirty they will not make good contact.
Therefore always check that:
1 The suction, pressure and nozzle fi lters are clean.
2 The hoses are well-fi tted and have no splits or cracks.
3 The joints and o-rings are in good condition.
4 The pressure gauge is in good condition. The correct dosage depends on its accuracy.
5 The operating unit is in good working order. Test it with clean water.
6 The electrical components are clean.

Troubleshooting

To help solve any problems consult this table before taking the machine to a repair workshop.
If the problem is not in this table consult your nearest dealer.
Fault
No liquid comes out of
the nozzles.
mercury
Troubleshooting
Cause
Air entering suction.
HARDI ® MERCURY OPERATOR'S MANUAL
Solution
Check that the suction O-ring seals
properly.
Check the main suction hose and its
connections.
Make sure that the valve bodies and
suction chamber are not loose.
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