Stihl MS440 build

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First thing I microwaved the new bearings and slid them on the crankshaft.

 

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Next, I heat up the flywheel side case half.

 

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Once hot, then drop the crankshaft in and let set.

 

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Repeat with the PTO side case half.

 

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Once heated, with gasket in place, I place the two halves together.

 

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Moving quickly after bolts are snugged up, I take a brass hammer and tap the crankshaft to alleviate any side loading of the bearings.

 

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Confirm this is talking place by flicking the connecting rod until the crankshaft will roll back and forth on its own.

 

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Cut the gasket sticking up with a razor blade.

 

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I like to put a couple of headless screws in for alignment while I am working with the cylinder.

 

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New connecting rod bearing.

 

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With a little two stroke oil for assembly lube.

 

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Attach the piston being both careful and observant of attaching the circlips.

 

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On to installing the crank seals. First add a little bit of grease.

 

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Then drive it in. I'm using a driver that I made so as to stop at the correct depth for the flywheel side.

 

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Repeat on the PTO side. A regular seal driver works fine here.

 

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Lube up the crank adapter and install.

 

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Carefully tap in the woodruff key.

 

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Now finally I can get the cylinder on and get it timed to see where it's at.

 

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Once I have hatched a plan, it's ready for some lathe time. First to get it in zero alignment.

 

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I like to cut the squish band first.