Abstract: The new drive arrangement involves a machine having upper and lower decks with respective upper and lower openings through them. The drive arrangement includes a flanged bearing housing attached to the lower deck. The upper opening and the bearing housing are configured to permit the bearing housing to pass through the upper opening. The flange is attached to the upper surface of the lower deck member and so configured and arranged, the drive arrangement may be installed through the upper opening. The new drive arrangement may be fully assembled with bearing, bearing housing, grease trap and pinion gear for mounting "top down" onto the deck members, thereby eliminating the need for bottom access and greatly simplifying initial installation and later repair.