Hardi ALPHA EVO II EcoDrive User Manual

7 - Repair
190
Spraying
Hydraulic functions
FAULT POSSIBLE CAUSES SOLUTION
No spray from boom Air leak on suction line Check tightness of suction filter
Check external hose connection
Check diaphragm pump (diaphragms, valves, valve
covers)
Air being sucked into system Start the sprayer pump
Suction/pressure filter clogged Clean the filters
Lack of pressure Faulty fitting Faulty safety valve (if fitted)
Faulty pump valves (463 pump) Check that valves are not obstructed
Incorrect pressure reading Check that pressure gauge is not obstructed
Pressure dropping Filters clogged Clean the filters and fill with clean water. If liquid is
powdery, check that agitation is activated.
Nozzles worn Check flow rate of nozzles and replace if necessary if
the difference in flow is greater than 10%
Tank under negative pressure Check vent is working correctly
Sucking air towards end of tank load Reduce pump speed
Increase in pressure Nozzles not suitable for flow rate Use a nozzle with a higher flow rate
Formation of foam Air is being sucked into system Check connectors
Excessive agitation Reduce pump speed
Check safety valve (if fitted)
Ensure returns inside tank are present
Use foam damping additive
Liquid leaks from bottom of pump Pump diaphragms damaged Replace diaphragms
Motorised valve not working or malfunctioning Blown fuse(s) Check operation of limit switches. Use a rust removing
agent for contacts if necessary.
Check electrical current absorbed by vacuum motor:
450-500 milli-Amperes max.
Polarity inversion Brown - pos. (+). Blue - neg. (-).
Valve does not close completely Check valve seals (obstruction)
Check position of microswitch brackets. Loosen flange
screws by 1/2 turn
No power Wrong polarity. Check brown wire = pos. (+), blue=
neg. (-).
Check printed circuit welds or loose connections.
Check tightening of fuse holder and fuse.
FAULT POSSIBLE CAUSES SOLUTION
No boom movements when activated Insufficient hydraulic pressure Check that solenoid valve is operating correctly
Check/adjust hydraulic pressure
Insufficient oil supply Check hydraulic pump concerned
Faulty fuse Check/replace fuse
Faulty distributor or by-pass Check solenoid and connector
Check distribution valve tray.
Replace distribution valve if necessary.
Ram not functioning Jet clogged Dismantle connector and clean jet
Faulty distribution valve Check solenoid
Check distribution valve tray
Power supply Check control (handle or REGULOR6).
Check multi-function handle
Check REGULOR6 configuration
Check printed circuits and connections

Hardi ALPHA EVO II EcoDrive Specifications

General

Brand	Hardi
Model	ALPHA EVO II EcoDrive
Category	Farm Equipment
Language	English