Sharp R-440/540 Betreibershandbuch Seite 166

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158 918496/GP0313
Attachment tilts down with
tilt control in neutral
Oil leaking past tilt cylinder
seals (internal or external)
Contact dealer
Leaking hydraulic hoses,
tubes or fittings between
control valve and cylinders
Repair as required
Lift arm does not
raise/lower
Lift spool in control valve not
actuated or leaking
Contact dealer
Hydraulic oil leaking past
cylinder piston seals
Contact dealer
Attachment tilt not working
but lift arm works properly
Tilt spool in control valve not
actuated or leaking
Contact dealer
Lift arm does not raise but
tilt works properly
Lift spool in control valve not
actuated or leaking
Contact dealer
Hydraulic system
overheating
Hydraulic oil cooler is dirty Clean hydraulic oil
cooler
Hydraulic oil level is too low Add hydraulic oil
Load too high Reduce load
AL 100 Series hydraulic
tanks not evenly filled
See “Checking Hydraulic
Oil Level” on page 122.
Lift and/or tilt functions too
slow
Low engine speed Increase engine speed
Low hydraulic oil level Add oil and check for
leaks
Hydraulic oil leaking past
cylinder piston seals
Contact dealer
Hydraulic pump malfunction Contact dealer
Lift and/or tilt functions
inconsistent/jerky
Air in hydraulic system Cycle lift and tilt
cylinders to maximum
stroke and maintain
pressure for short time to
clear air from system
Low hydraulic oil level Add oil and check for
leaks
Cylinder(s) malfunction Contact dealer
Travel drive performance
inconsistent/jerky
AL 100 Series hydraulic
tanks not evenly filled
See “Checking Hydraulic
Oil Level” on page 122.
Hydraulic System Troubleshooting
Problem Possible Cause Corrective Action
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