Abstract: A workhead assembly for use with a rail maintenance machine having a workhead assembly for use with a rail maintenance machine having a rail lifter and configured for movement relative to a railroad track having a pair of rails, the workhead assembly constructed and arranged for positioning a tie plate predisposed on a rail tie, including a workhead body connected to the machine; a centering apparatus on the body constructed and arranged for centering the workhead over the rail tie; a squaring apparatus on the body constructed and arranged for squaring the tie plate on the rail tie; and a pusher assembly on the body for positioning the tie plate under a selected one of the rails being lifted by the rail lifter, and including at least one plate engaging finger constructed and arranged for engaging the tie plate.

Abstract: A method (300) for fault detection in a system under control includes monitoring a command value and a wraparound signal (301) by a fault detection module (203); determining a standard deviation of the command value (302) by the fault detection module; determining a standard deviation of the wraparound signal (303) by the fault detection module; determining a ratio of the standard deviation of the command value to the standard deviation of the wraparound signal (304) by the fault detection module; and determining the presence or absence of a fault in the system under control by the fault detection module based on the ratio (305) by the fault detection module. A fault detection module (203) and a computer program product comprising a computer readable storage medium containing computer code that, when executed by a computer, implements a method (300) for fault detection are also provided.

Abstract: A workhead assembly for use with a rail maintenance machine having a workhead assembly for use with a rail maintenance machine having a rail lifter and configured for movement relative to a railroad track having a pair of rails, the workhead assembly constructed and arranged for positioning a tie plate predisposed on a rail tie, including a workhead body connected to the machine; a centering apparatus on the body constructed and arranged for centering the workhead over the tie; a squaring apparatus on the body constructed and arranged for squaring the tie plate on the rail tie; and a pusher assembly on the body for positioning the tie plate under a selected one of the rails being lifted by the rail lifter, and including at least one plate engaging finger constructed and arranged for engaging the tie plate.

Abstract: A riding rail tie plugging apparatus for plugging spike holes in ties on a railroad track includes a frame provided with wheels for supporting and moving the frame along the track. At least one reservoir is disposed in operational relationship to the frame for dispensing a supply of chemical tie-plugging solution. At least one applicator gun is in fluid communication with the at least one reservoir for dispensing the solution into the holes. At least one operator station is on the frame in operational relationship to the track and to the at least one applicator gun so that the at least one applicator gun is directly positionable by an operator disposed at the station for dispensing the epoxy solution into selected ones of the holes.

Abstract: A riding rail tie plugging apparatus for plugging spike holes in ties on a railroad track includes a frame provided with wheels for supporting and moving the frame along the track. At least one reservoir is disposed in operational relationship to the frame for dispensing a supply of chemical tie-plugging solution. At least one applicator gun is in fluid communication with the at least one reservoir for dispensing the solution into the holes. At least one operator station is on the frame in operational relationship to the track and to the at least one applicator gun so that the at least one applicator gun is directly positionable by an operator disposed at the station for dispensing the epoxy solution into selected ones of the holes.