Abstract: A method for repairing worn brake assembly holes on a highway trailer axle assembly including a cam shaft hole, and first and second anchor pin holes and including an axle stub extending from an end thereof, comprising the steps of aligning a boring tool, having a tool axis, with each brake assembly hole axis by aligning the tool axis parallel with the stub axis; positioning the tool axis at a distance from the stub axis equal to the distance of the brake assembly hole axis from the stub axis; and positioning the tool axis at an angular position relative to the brake assembly hole axis that is equal to the angular position of the brake assembly hole axis relative to the axis of another of the brake assembly holes. The aligned boring tool is then driven to bore an oversize hole through the worn brake assembly hole such that the worn brake assembly hole, including any worn extremities thereof, is consumed by the oversize hole, leaving a substantially cylindrical oversize hole.

Abstract: An apparatus for removing deposits from the internal surface of a substantially cylindrical tube comprises a cap adapted to cover a first end of the tube and defining a hole. A shaft is slidably and rotatably mounted in the hole and a plurality of cutters extend outward from an inside end of the shaft, spaced about the exterior of the shaft, each cutter movable from a retracted position outward from the shaft to an extended position. A bias force supplied by a pressurized fluid source acts on each cutter toward the extended position. A drive is operative to rotate the shaft as the shaft slides along the hole. A channel can be provided to supply pressurized fluid to an interior of a tube to blow debris out.

Abstract: A method for repairing worn brake assembly holes on a highway trailer axle assembly including a cam shaft hole, and first and second anchor pin holes and including an axle stub extending from an end thereof, comprising the steps of aligning a boring tool, having a tool axis, with each brake assembly hole axis by aligning the tool axis parallel with the stub axis; positioning the tool axis at a distance from the stub axis equal to the distance of the brake assembly hole axis from the stub axis; and positioning the tool axis at an angular position relative to the brake assembly hole axis that is equal to the angular position of the brake assembly hole axis relative to the axis of another of the brake assembly holes. The aligned boring tool is then driven to bore an oversize hole through the worn brake assembly hole such that the worn brake assembly hole, including any worn extremities thereof, is consumed by the oversize hole, leaving a substantially cylindrical oversize hole.