Abstract: A hydraulic pump for use in a pump assembly of a railway track lubricating system includes a housing defining an intake chamber having an intake port, an outlet channel leading to an outlet port, a gear chamber containing interengaged gears, a discharge port having a discharge port, a window opening between the gear chamber and the discharge chamber, and a double head piston having a first head in the intake chamber, a second head in the discharge chamber, and a spring for biasing the piston to a first position where the first head is spaced a maximum from a wall between the intake chamber and the discharge chamber. The outlet port has a smaller cross section than the outlet channel so that checked charged deliveries of hydraulic fluid into the intake chamber will cause the piston to move from its first position to a second position and force grease out of the discharge chamber through the discharge port.

Abstract: A device for lubricating a track or a rail that is adapted to be mounted to a wheeled vehicle. The device includes a frame member adapted to be mounted to the vehicle and an arm pivotally attached to the frame member. A roller, which is adapted to ride on the rail, mounts to the arm and receives a guide. A lubricating nozzle attaches to the guide.

Abstract: A method and apparatus for controlling the amount of lubricant dispensed in a railway lubricating system wherein a test cycle is effected during which lubricant is dispensed in a test amount to detect the influence of lubricant viscosity on the system, and wherein further dispensing cycles are effected to sequentially dispense an accurate and desired amount of lubricant in conformity with the detected influence of lubricant viscosity.