Looking at the filter,turn the ring clockwise to remove.I use a large pair of channel lock pliers. The whole slotted ring is removed(like a big nut).After ring removal,the plastic bowl and "O" ring are removed by pulling straight down.I forgot to mention,first shut off the fuel by turning the petcock on the side of the housing,otherwise a real mess will result.The air blead procedure is easy.After putting all back together and turning fuel cock back on, the air vent-cock on the fuel injector pump is opened fully,start engine,run for 30sec.,stop engine,close air vent-cock,restart engine all should be ok. GOOD LUCK!