7 - Fault finding
7.3
CONTROL/REMEDY
Insufficient hydraulic pressure.
Power supply.
Various.
Various.
PROBABLE CAUSE
Check output pressure of tractor hydraulics. Minimum for
sprayer is 2000 psi (130 bar).
Check for proper 12V power supply.
Check for defective switch(es).
Check continuity of cables.
Check for operation of applicable solenoid (coil not activating
or plunger stuck).
Check for short circuit in wiring junction box at rear of sprayer.
Dirt in the restrictor port of the cylinder.
Check for correct solenoid electric/hydraulic hook-up.
Check for short circuit in wiring in the junction box at rear of
sprayer.
No boom movements when activated.
Ram not functioning.
Hydraulic system fold/tilt functions will
not operate.
One function (fold or tilt) will not oper-
ate.
Multiple hydraulic functions with one
switch activated.
FAULT
Bad / corroded electrical connections. Check / clean connections, multi plugs, etc.
Hydraulic system - HZ model.
CONTROL/REMEDY
Air in system.
Restrictor blocked.
PROBABLE CAUSE
Loosen ram connection and activate hydraulics until oil flow
has no air in it (not whitish).
Secure boom. Dismantle and clean. Change hydraulic oil & fil-
ter.
Boom slow/erratic.
Ram not functioning.
FAULT
Insufficient hydraulic pressure. Check output pressure of tractor hydraulics. Minimum for
sprayer is 2000 psi (130 bar).
Insufficient amount of oil in tractor reser-
voir.
Check and top if needed.
Hydraulic system - HY model.
Insufficient amount of oil in tractor reser-
voir.
Check and top if needed.
Blown fuse(s). Check / replace fuse in junction box.
Insufficient power supply. Voltage on activated solenoid valve must be more than 8
Volts. Use wires of at least 10 awg. (4mm
2
) for power supply.
Defective relay / diodes in junction box. Check relays, diodes and soldering at PCB in junction box.
Restrictor blocked. Secure boom. Dismantle and clean. Change hydraulic oil & fil-
ter.
Restrictor blocked. Secure boom. Dismantle and clean. Change hydraulic oil & fil-
ter.
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