MAINTENANCE/ TROUBLESHOOTING
U.C10.00.00.EN Version 2.0 69
7.9 Troubleshooting
DANGER!
Remove the key from the key switch when performing work on
the compact crane.
DANGER!
Never use your hand to locate a leak in the hydraulic system; use
a piece of paper or cardboard instead. Oil under high pressure can
penetrate the skin and cause poisoning.
WARNING!
Hydraulic oil can be hot; wear gloves and safety glasses when
troubleshooting the hydraulic system.
WARNING!
When a leak has developed in the hydraulic system, not only
repair the leak immediately but also top off the oil reservoir.
WARNING!
When disconnecting hydraulic lines and hoses, precautionary
measures must be taken to ensure that the line/hose is no longer
under pressure once the supply of energy to the system has been
switched off. This can be achieved by moving the control levers
back and forth.
CAUTION!
Consult the dealer.
Correct operation and careful maintenance ensure that the compact crane will have a long life with fewer
problems.
The warnings above must be heeded for all work performed in connection with a malfunction.
Many common malfunctions are listed hereafter. If a malfunction occurs that is not mentioned in this user
manual, please contact your dealer or Hoeflon International B.V.
Malfunction Cause Solution
The compact crane is not
working properly; it jerks.
Too little oil in the hydraulic
system.
Hesitation when operating
lever on remote control.
Check the hydraulic oil level.
Vibrations in the crane. Oil temperature too low. Increase oil temperature by raising and
lowering an outrigger leg.
Telescoping section does
not extend or retract
completely or slides with
difficulty.
Guide not well lubricated. Lubricate the guide.
The crane does not slew
well.
Turntable not well lubricated.
Damaged or worn turntable
mechanism.
Lubricate the turntable.
Overhaul the turntable mechanism
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