Push the driveline bearing onto the protruding end of the driveline.

Align the height adjustment lever and driveline bearing bolt with the hole on the axle.

Align the components such that the height adjustment lever falls into the "A" position.

Using a 1/2 inch socket, secure both in place with the driveline bearing bolt, but don't tighten it all the way yet.

Install the right driveline bearing onto the right side of the mower, securing it in place with the 1/2 inch driveline bearing bolt.

Now, securely tighten both left and right side driveline bearing bolts