7 - Fault Finding
105
Hydraulic System
FAULT PROBABLE CAUSE CONTROL/REMEDY
Boom slow/eradic. 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 until desired speed is achieved (clockwise = less
speed).
IInsufficient hydraulic pressure. Check output pressure of tractor hydraulics. Minimum for
sprayer is 170 bar.
Insufficient amount of oil in tractor reservoir. Check and top if needed.
Ram not functioning. Restrictor or regulation valve blocked. Secure boom, dismantle and clean.
Hydraulic system lift/tilt functions will not
operate.
Power supply. Check for proper 12V power supply.
One function (lift or tilt) will not operate. Various. Check for defective switch(s).
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.
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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