Sooo , i am fitting new crank shaft, i have the old one out and all ready wit hnew seals to put new one back in but i have seen people using a gas flame gun thing to heat it up? i was wondering what thats for?
Hi lukemills12345 people use a flame gun (propane torch) to heat the area around the cases were the bearings drop in to make is easyer to fit them. Also stick the bearings in a freezer bag (or any sealed, bag try to get as much air out of the bag as you can) stick them in the freezer (the cold shrinks them ever so slightly) for a few hours. so the paln should be Bearings in freezer over night. crankcases inside kept at room temp get stuff set up grab bearings from freezer Propane torch to heat area around were the bearings !!DO NOT HOLD IT IN ANY ONE PLACE FOR TOO LONG!! 6 circles of the bearing area it fine. drop the bearings in !!! If you have to tap then down a bit use a rubber mallet and only hit the outer race of the bearing. let the cases cool a bit then fit the seals Job done !!!! :yahoo: Edit added a video for you too http://www.youtube.com/watch?v=vVKeT8Mh2dQ&playnext=1&list=PL4E6D8502E4912D62 click 4mins 22 seconds in and watch !!! :good:
if you look on shiny reds youtube channel theres a great video on installing crank and bearings and dont use a flame torch a heat gun is much better
