(57) A rail vehicle braking system comprises a brake (4) mounted on a rail vehicle by
mounting apparatus, the mounting apparatus providing for movement of the brake between
a first position, in which the brake is a desired distance above a rail on which the
said vehicle is mounted, and a second position, in which the brake engages with the
rail to generate a braking force. Movement of the brake from the first to the second
position is caused by electromagnetic attraction between the brake and the rail. The
mounting apparatus comprises a piston and cylinder arrangement (11, 13, 18, 19, 24)
secured between the vehicle and the brake, the piston and cylinder arrangement comprising
biasing means (22) to lift the brake into the said first position and supply means
(31-33) to introduce hydraulic fluid into the cylinder or to remove hydraulic fluid
from the cylinder, whereby the first position of the brake may be adjusted.
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