Wheelskate

A wheelskate, wheel skate, or axle dolly is a device used to lift the axle of a damaged or blocked rail wheel set and prevent it sliding over the rail. With the axle lifted and wheels off the rails, the train can be moved for repairs.^[1]

To be able to use a wheelskate, access to one side of the vehicle is required. This is especially important for the design of tunnel cross-sections.

Wheelskates are used by a variety of railroads, both passenger and freight.^{[2][self-published source?]} They enable the continued operation of rail lines that would otherwise be brought to a halt by a breakdown.^[3]

References

1. Safety Central. "Jargon Buster". Retrieved 14 March 2013. A device used in the case of a locomotive or vehicle having a wheel which is seized and will not rotate freely, to enable it to be moved clear of a running line.
2. Ellis British Railway Engineering Encyclopedia. Lulu.com. 7 September 2006. p. 424. ISBN 978-1-84728-643-7. Retrieved 14 March 2013. A wheeled device reminiscent of a skateboard, used to lift a damaged rail wheel clear of the rail, in turn allowing the rail vehicle to be moved (slowly) to a place of repair.
3. Railway Safety. "Design and Operation of Wheelskates" (PDF). pp. 6 (PDF page 8). Retrieved 14 March 2013. A device for rescuing crippled vehicles where a wheelset is not fit to rotate, by lifting the affected wheelset and providing alternative support and guidance.