Lucks SM160B AR, Instruction And Maintenance Manual

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MAN019.00
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24) valves are blocked
6
24 a) valves are blocked at the
output by rubber or other
substances
b) valves are semi-open due to
the presence of impurities
INCORRECT MOVEMENTS
of the hydraulically driven
members, with respect to the
programmed movements
25) cylinders are blocked
26) excessive loss of force
27) variable pressure at the
accumulators
25 a) internal assembly of the
cylinder is incorrect
b) loads normal to the axis are
not allowed
c) seizure of connecting pins
26 refer to point 4
27 a) insufficient accumulator
capacity
b) increased demand from the
circuit due to internal
leakage
EXCESSIVE WEAR
that is, excessively rapid
compared to the actual time of
operation and the maintenance
carried out 28) oil contains abrasives
29) insufficient lubrication
30) high working pressure
31) faulty connections
28 a) oil is too old
b) inefficient filters have been
used
29 a) poor quality oil has been
used
b) oil which is too liquid at the
working pressure has been
used
30 relative to the maximum
pressure allowed for the
pump and for the valves
31 abnormal stress on the shafts