Troubleshooting - H&S HI-DUMP 9215 Operator's Manual

WARNING;
MAKE SURE THAT THE TRACTOR IS SHUT OFF AND THE TRAILER CAN NOT MOVE
BEFORE SERVICING THE HI-DUMP. MAINTENANCE AND REPAIR SERVICE WORK
MUST BE PERFORMED BY A QUALIFIED SERVICE PERSON ONLY.
SYMPTOM
Box will not •
raise or lower
•
•
•
•
Box will not •
dump properly
Box chatters •
when raising or
lowering, or will
•
not raise to full
height
•
Box raises or •
lowers slowly
•
•
•
TROUBLE SHOOTING
POSSIBLE CAUSE
No hydraulic power
Lift/Dump cylinder
leaking
Box overloaded
Insufficient
hydraulic
pressure
Hydraulic circuit
crossed
Box dumped on side
hill
Air in hydraulic
system
Oil level low
Insufficient reservoir
capacity
Not enough hydraulic
oil volume
Lift/Dump cylinder is
leaking internally
Box overloaded
POSSIBLE REMEDY
• Connect hydraulic circuits to tractor properly
• Actuate proper hydraulic valve
• Check quick-couplers to be certain they are
completely engaged
• Replace clogged hydraulic filter in tractor
• Fill tractor hydraulic oil to proper level
• Repair or replace cylinder as needed
• Remove part of the load
• Use power unit capable of providing 2250 psi.
minimum pressure
• Replace worn hydraulic pump on tractor
• Trace hydraulic circuit and connect so front and rear
lift cylinders lift in series, & the dump cylinders are
plumbed in parallel
• Dump box on level surface
• Actuate lift/dump cylinders to fully extend and retract
to purge the system of air
• Add hydraulic oil to the towing vehicles
hydraulic system
• Change power unit to provide a minimum
reservoir capacity of 20.1 galIons
• Use a power unit capable of providing 34.1 GPM
minimum
• Replace worn pump
• Replace clogged hydraulic filter in tractor
• Check for leaking fittings
• Repair or replace Lift/Dump cylinder as needed
• Remove part of the load