Not to be confused with Official Table of Drops or Drop (SQL).
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'Lord Nelson' class No. 851 Sir Francis Drake, at a drop table at Stewarts Lane, c. 1928.Two wheelsets in a North American (Bettendorf-style) freight bogie.
A drop table or wheel drop is a device used in railway engineering during maintenance jobs that require the removal of locomotive or rolling stock wheelsets.[1] The machine is built in a drop pit allowing a locomotive or rolling stock to be rolled onto it, avoiding the need for heavy cranes or jacks to lift the vehicle off the rails.
The vehicle is placed over the drop table, and the connections attaching the wheelset to the vehicle are unfastened. This allows the wheel set to 'float' independently of the locomotive. The wheelset is lowered into the drop pit on a short section of rail, and a dummy rail, normally a part of the drop table machinery, is then inserted in the gap over the lowered wheelset. This enables the vehicle to be moved clear of the drop table on its remaining wheels, so that the removed wheelset can then be lifted out of the drop pit for maintenance work to be performed on it.
^The Century dictionary and cyclopedia; a work of universal reference in all departments of knowledge. The Century Co. 4 January 2024.
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