36
Application
Hydraulic Head Spindle Device VST
Translation of the Original Instructions for Use
Troubleshooting
Cylinder is extended
but does not withstand
the pressure.
Cylinder cannot be ex-
tended, extends too
slowly, or stops during
the start-up.
Malfunction
Malfunction
Possible cause
Possible cause
Remedial action
Remedial action
Open drain valve.
Internal leakage in the
pump.
Loose connection on
the hydraulic pump.
Load too heavy.
Trapped air in the
system.
Cylinder piston is stuck.
Leaky connection.
Defective seal.
Drain valve opened.
Oil level is too low in
the pump.
Top up oil in accordance with the
Maintenance and Repair section.
Close drain valve.
Arrange to have the pump
serviced by a qualified hydrau-
lics technician.
Check that all couplers have
been completely tightened.
Do not try to lift more than the
nominal load of 700 kN (680 bar).
Bleed air in accordance with the
instructions provided in the
Hydraulics section.
Check the cylinder for signs of
damage. Arrange to have the
cylinder serviced by a certified
hydraulics technician.
Check whether all connections
are tight and leak-proof. If yes,
depressurize the system.
Locate leakage and then arrange
to have the connectors and
couplings serviced by a qualified
hydraulics technician.
Close drain valve.
EN_BA_Hydr_Kopfspindeleinheit_VST.indb 36
01.04.16 11:25
Summary of Contents for 117465
Page 27: ...25 Hydraulic Head Spindle Device VST Translation of the Original Instructions for Use...
Page 44: ...42...
Page 45: ...43...
