Abstract: Methods are disclosed to refurbish a fuel injector to original manufacturing operational tolerances.

Abstract: A tool and apparatus to refurbish a valve seat having a compound geometry, such as a valve seat in a valve body for a common rail fuel injector is disclosed. The tool includes a body with a head portion having substantially the same geometry as the valve seat to be refurbished. The tool further includes a radiused portion located between two angled surfaces of the tool that functions to provide a chamfered cut at the intersection of the valve seat and diffuser passage to be refurbished. The apparatus includes a collet to secure the tool, and the collet may be mounted or secured to a fixture which is in turn mounted on a preloaded biased base so movement of the tool in the Z axis is controllable. The apparatus also comprises a slide moveable in an X and Y axis for adjustment of the tool.

Abstract: Methods are disclosed to refurbish a fuel injector to original manufacturing operational tolerances.