Like wayne suggested, if your center cap is removable from the outside then yes. If not, It might be possible to sacrifice the C cap to get at your grease cap, only if it will fit out the center hole. Ole Murphy jumped all up into your project did`nt he, Jeez, what a predicemate. The only other thing I can think of at the moment, would be to fashion a 18 ga. piece of sheetmetal into a large funnel tight to the lugnut and Hotarc it off. goodluck
