| 摘要 |
A tool for mounting the valve assemblies of an engine block, each valve assembly being of the type comprising a valve with an elongated stem, a compression spring surrounding the valve stem, with one end abutting the engine block and the other end abutting a spring retainer, a segmental keeper engagable in an annular groove in the valve stem and maintaining the spring retainer in position on the valve stem, and an oil sealing ring mounted in an annular groove in the valve stem and sealingly engaging the spring retainer. The tool comprises a body portion having a free end and a working end. An axial bore extends inwardly of the working end and is of such diameter as to just nicely receive the free end of the valve stem. The working end provides a surface surrounding the axial bore and during the valve mounting operation is positioned to abut the segmental keeper when the free end of the valve stem is located within the axial bore such that when an axial blow is administered to the tool, the segmental keeper will shift along the valve stem until it is engaged in its annular groove. The depth of the axial bore is such that the free end of the valve stem will abut the bottom of the bore preventing the tool from shifting the segmental keeper beyond its groove engaging position and into contact with the oil sealing ring, thus preventing damage or destruction to the oil sealing ring.
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