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Introduction
A flood within a
central London property had been caused by an accumulation in
pressure from a blocked sewer causing an inspection manhole within
the low level lift plant room to leak and allow fluid detritus
to enter to a height of approximately 500mm resulting in significant
damage to the lift control equipment.
As a consequence
of this damage, the lift contractor provided a quotation for
remedial repairs which included complete replacement of the control
panel, complete replacement of the hydraulic drive unit including
ram and cylinder, rewiring including trailing cables and replacement
of numerous ancillary components damaged as a result of the flooding
and consequential cleaning which totalled several thousand pounds.
A considerable amount !
Findings
Not surprisingly
the client was not overjoyed at this and, although they did not
simply want another quote, they did seek a second opinion. J
Bashford & Associates were |
engaged to carry
out an inspection and provide a full report detailing the current
condition of the equipment and recommend remedial restorative
works.
The indirect acting
drive system installed to the lift operates a hydraulic ram via
a system of pulleys and hoisting ropes acting on a cantilevered
design lift car. The equipment is designed to contain and prevent
leakage of high pressure hydraulic fluid, consequently the design
will inhibit the ingress of water and other contaminants. Our
inspection/survey of the lift also included taking a sample of
the hydraulic fluid contained within the drive unit reservoir
for detailed analysis. The resultant analysis report indicated
that no water or other contaminants were present within the sample.
Consequently, complete replacement of the hydraulic drive system
was not necessary to return the lift to the same condition as
prior to the incident.
Moreover, the lift
hydraulic cylinder/ram assembly was supported on a heavy gauge
steel fabricated stool and therefore was located clear of the
flood damage area. Our inspection of the lift installation identified
no evident contamination and/or damage to either the hydraulic
cylinder or the ram within the lift shaft. |