A regulator moldboard and grader blade assembly includes a moldboard having at least one transversely extending pin, the pin having a notch with a surface inclined toward the moldboard. At least one grader blade has at least one mounting opening having a flared surface complementary to the notch so that the blade is hangable on the pin so that the notch draws the blade against the moldboard as a fastener tightens the blade to the moldboard.

A sweeping device works on a track formed of rails and sleepers. The sweeping device has a brush shaft formed from a plurality of shaft portions configured as hollow shafts, and resilient sweeping elements protruding radially from the brush shaft. The sweeping device can be attached via at least one adjustable vertical drive to a vehicle that can travel on rails. It is provided that at least one axis of rotation of a shaft portion is adjustable via a control shaft with control elements acting externally on the shaft portion.

A track maintenance machine with a conveyor or excavating chain arrangement for removing and collecting railway ballast and/or other formation or substructure layers of a track structure is shown, comprising a cutter bar which can be positioned below a track and which has at least two bar elements, each adjustable in position and alignment, and which is attached to an ascent channel and to a return channel. The device comprises a guided excavating chain consisting of a plurality of chain links, wherein the arrangement can be fastened to a machine frame via at least one height-adjustable suspension device. The excavating chain is designed to be divisible, that the bar elements can be connected via a coupling to form a closed overall unit, and that the arrangement can be variably adjusted in its excavating working width by adjusting the position of the bar elements.