Hydraulic System - Hy Model; Hydraulic System - Hv/Hz Model - Hardi Ranger 550 Instruction Book

Hydraulic system - HY model.

FAULT
Boom slow/erratic.
Ram not functioning.

Hydraulic system - HV/HZ model.

FAULT
No boom movements when activated.
Ram not functioning.
Hydraulic system fold/tilt functions will not operate. Power supply.
One function (fold or tilt) will not operate.
Multiple hydraulic functions with one switch
activated.
PROBABLE CAUSE
Air in system.
Insufficient hydraulic pressure.
Insufficient amount of oil in tractor reservoir.
Restrictor blocked.
PROBABLE CAUSE
Insufficient hydraulic pressure.
Insufficient amount of oil in tractor reservoir.
Blown fuse(s).
Bad / corroded electrical connections.
Insufficient power supply.
Defective relay / diodes in junction box.
Restrictor blocked.
Restrictor blocked.
Various.
Various.
7 - Fault finding
CONTROL/REMEDY
Loosen ram connection and activate hydraulics until
oil flow has no air in it (not whitish).
Check output pressure of tractor hydraulics. Minimum
for sprayer is 2000 psi (130 bar).
Check and top if needed.
Secure boom. Dismantle and clean. Change hydraulic
oil & filter.
CONTROL/REMEDY
Check output pressure of tractor hydraulics. Minimum
for sprayer is 2000 psi (130 bar).
Check and top if needed.
Check / replace fuse in junction box.
Check / clean connections, multi plugs, etc.
Voltage on activated solenoid valve must be more
than 8 Volts. Use wires of at least 10 awg. (4mm²) for
power supply.
Check relays, diodes and soldering at PCB in junction
box.
Secure boom. Dismantle and clean. Change hydraulic
oil & filter.
Secure boom. Dismantle and clean. Change hydraulic
oil & filter.
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.
7.3