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Installation of T-20 case bushings
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Years ago, when I worked as a main dealer truck mechanic we used to have to heat up casings etc to fit bushes / bearings. We used to drop the casings in a tub of oil over a gas heater and heat until JUST smoking. This way the heat is evenly distributed and it's difficult to overheat one spot so minimizes distortion.
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This job isn't easy without the equipment. I made a portable boring system for this years ago. Mine sets up on the output bearing bore and a modified center support. I'v also had several cases that were bored several thousandths off center. The new bushings finish a lot better than the old style. great video Whipper.
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