what do professionals use to do bearings on a crank. how come i cant mark everything carefully and split the crank and do bearings myself? if everything lines up again i would think it would work just fine, no?
Im a little skeptical about his methods in the video. I have split the crank from an old TX 340 and it took 10 tons with a hydraulic press to remove one of the pins. Im guessing that theres probably .001"-.002" interfenence between the pins and holes. Once that pin is in the hole, shrunk in or pressed, its where its supposed to be, there aint no changing it. Hes talking about BENDING the crank webbing. This does not fix the problem if your crank is out of true. If you apply his method to a crank and it reads true on a straight diameter, then you move your indicator to the taper, I guarantee your taper will not run concentric with the diameter you were indicating off of when you "trued your crank with a chisel". The misalignment that hes attempting to compensate for I think is from the webbings on both sides of a connecting rod pin not being alinged properly with each other about the con rod pin. This will cause the centerliine of the crank to be skewed, and all your crank bearing will not rotate about the same axis. Even a degree of misalignment at the con rod pin will cause several thousandths of misalignment at ends of the crank. You cannot fix this with a chisel or a vise.mr_green said:here is a great little clip discussing truing of the crank.