Hydraulic System - Hardi NK SB Series Instruction Book

Hydraulic System

FAULT
Boom slow/eradic.
Ram not functioning.
Hydraulic system lift/tilt functions will not
operate.
One function (lift or tilt) will not operate.
Multiple hydraulic functions with one switch
activated.
PROBABLE CAUSE
Air in system.
Regulation valve incorrectly set.
IInsufficient hydraulic pressure.
Insufficient amount of oil in tractor reservoir.
Restrictor or regulation valve blocked.
Power supply.
Various.
Various.
7 - Fault Finding
CONTROL/REMEDY
Loosen ram connection and activate hydraulics until oil flow
has no air in it (not whitish).
Open or close until desired speed is achieved (clockwise = less
speed).
Check output pressure of tractor hydraulics. Minimum for
sprayer is 170 bar.
Check and top if needed.
Secure boom, dismantle and clean.
Check for proper 12V power supply.
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.
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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