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What is a mandrel in exhaust systems?

Updated: 10/20/2022
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12y ago

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Simply said, a mandrel is a tool used to shape machines. In mufflers, it is tubing usually made of steel used as a support when bending exhaust pipes. The main reason for this is to reduce the possibility of deformation as much as possible. The mandrel bends with the pipe stretching on the outside of the bend and compressing on the inside ensuring a constant diameter bend that reduces restrictions.

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Q: What is a mandrel in exhaust systems?
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Answer by:MMH Expert_Jimmy K You should begin by removing the deck from the tractor. if not then elevate using ramps. * Remove the belts and the mandrel guards from the deck. * Block the blade with a strong piece of wood so it can't turn and remove the nut on the mandrel pulley. This is difficult to do without an impact driver. Don't hold the blade with your hand you might get cut. Use an impact driver to remove this nut and the blade bolt if possible. * Turn the deck over and use the wood to block the blade and remove the bolt holding the blade to the mandrel shaft and remove the blade. * You have to remove the jackshaft from the mandrel to drive the bearings out of the mandrel housing. Put the nut on the threads of the mandrel and drive the mandrel shaft out the bottom of the mandrel housing. You can drive the bearings out with a screwdriver. The lower bearing will usually come out of the housing when you drive the shaft out. * Drive the upper bearing into the mandrel housing using a piece of wood on the bearing and tapping the wood with a hammer. The lower bearing is on the jackshaft and will go into the housing when you tighten the nut on the pulley. Reassemble the blades and mandrel cover and reinstall the deck under the tractor.