13
s
TROUBLESHOOTING
5000 SERIES OWNER’S MANUAL
SYMPTOM
PROBABLE CAUSE
Function fails to respond to controls
Pressure switch malfunctioning
Low hydraulic fluid
Faulty hydraulic pump
Short circuit in remote control
Crane not grounded to truck
Solenoid in control valve malfunctioning
Bad ground on control valves
Circuit breakers tripped
Dead battery
Anti-two block malfunctioning
Slow down of functions speed
Relief valve set too low
Low hydraulic fluid
Clogged filter/strainer
Pump not providing enough GPM
Boom drifts under load
Cylinder piston seals leaking
Counterbalance valve defective
Crane is overloaded
Boom or winch will not lift load
Restriction in hydraulic line
Cylinder piston seals leaking
Relief valve not set properly
Pump losing prime
Overload condition
Filter clogged
Counterbalance valve defective
Cable mis-wrap
Loose cable being wound on drum
Unusual noise during operation
Cavitation due to low hydraulic oil
Load is excessive
Suction line filter is clogged
Relief valve set too low
Relief valve defective
Air in the lines
Winch motor runs but fails to wind cable
Gear train is damaged
Erratic operation of hydraulic function
Air in hydraulic system
Crane will not rotate
Low hydraulic fluid
Hydraulic motor defective
Bad ground on control valve
Rotation speed too fast or too slow
Flow controls set incorrectly
Control valve defective
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