The lead screw has a fresh coat of lubricant. All the zerks have been squirted. The racks were not lubricated.
A tube of lubricant appropriate for the lead screw is in a drawer.
The new grease gun is full of lubricant appropriate for the zerks is in the same drawer.
A very big THANK YOU to @IanLee for the new zerk coupling. That thing works really well.