Ti, Ive done mine twice now, once cos the right hand stub axle broke and the other due to the accident. remove the screwed bottom cap with the Mack tool or a peice of 1/4 steel welded to a handle, place a steel support directly under the stub axle forging, remove the grease cap from on top, place a neat peice of shaft on the top of the kingpin and give it one almighty f$cking smack with a sledge hamer, if you only tap it, it wont budge, and if you dont suport it, then the shock wont travel through. the Mack king pin kit should comprise 2 kingpins and 4 sintered bearing shells. nig