The document provides instructions for removing and installing the flywheel housing on a Caterpillar C9.3 engine. It describes:
1) Removing the flywheel first before removing the flywheel housing.
2) Attaching lifting devices to the flywheel housing and removing bolts to take it off the engine block.
3) Applying gasket material before reinstalling the flywheel housing and tightening the bolts in reverse order of removal.