7 - Fault finding
7.3
Hydraulic system - I.A.H.
FAULT PROBABLE CAUSE CONTROL/REMEDY
Boom slow/erratic. Air in system. Loosen ram connection and activate hydraulics until
oil flow has no air in it (not whitish).
Regulation valve incorrectly set. Open or close un til desired speed is achieved
(clockwise = less speed).
Remember oil mus
t be at operating temperature.
Insufficient hydraulic pressure.Check output pressure of tractor hydraulics. Minimum
for sprayer is 2500 psi (170 bar).
Insufficient amount of oil in tractor reservoir.Check an
d top if needed.
Ram not functioning. Restrictor or regulation valve blocked. Secure boom. Dismantle and clean.
Hydraulic system fold/tilt functions will not operate. Power supply. Check for proper 12V power supply.
One function (fold or tilt) will not operate. Various.Check for defective switch(es).
Check continuity of cables.
Check for operation of applicable solenoid (coil no
t
activating or plunger stuck).
Check for short circuit in wiring junction box at rear of
sprayer.
Dirt in the restrictor port of the cylinder.
Multiple hydraulic functions with one switch
activated.
Various. Check for correct solenoid electric/hydraulic hook-up.
Check for short circuit in wiring in the junction box at
rear of sprayer.
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