Telescopic lift machanism that consist of two parts: the outer mast and the inner ,ast. The forklift moves along the profile forming the inner mast. The hudraulic cylinder lifts the forklift by a chain as soon as it is actuated the control valve. Since the lift cylinder is shorter than the iner mast, going up fork, this does not protude from the top until the fork not reached the level corresponding of the free lift.
Only when the piston of the cylinder contacts – crash- with a traverse support, begings move inside mast. To show inside closed premise low ceiling, in basements, or in closed carriage, the truck must be equipment with double – acting telescopic mast, or, where appropriate, with triple mast of double effect.