Maintaining the Lee Automatic Processing Press (APP)

After decapping around 3K of once fired 223 brass the APP started acting finicky, the long spring would bind and the red feeder was getting ‘gritty’ . I contacted Lee to see what they recommended for maintenance. Here is their reply (I changed the employee name to LeeDude):

LeeDude @ Lee Precision

Staff – 07/27/2020 9:27 am

Keep the black slide rail clean.
Lubricate the two steel columns the upper toolhead rides on, with oil.

Sincerely,
LeeDude

Lee Precision, Inc.
4275 County Road U
Hartford, WI 53027

Easy enough, here is how I did it.

Got everything I needed together and took it apart:

Maintaining the Lee Automatic Processing Press
Stuff I used

You can see the build up on the Black Slide Rail:

Maintaining the Lee Automatic Processing Press
APP MOLDED PARTS Dirty

There was also build up on the top and bottom of the Molded parts riser:

Maintaining the Lee Automatic Processing Press
Lee APP Molded parts riser Dirty

I dropped them in my Harbor Freight ultra sonic cleaner using water and a cap full of purple Simple Green.

Wiped them down and lightly oiled the two steel columns and shell plate. The instructions say “STP motor oil treatment or motor oil” I used 3 in one on the steel columns and Ballistol on the shell plate.

Maintaining the Lee Automatic Processing Press
Lee APP Molded parts riser Clean
Maintaining the Lee Automatic Processing Press
APP MOLDED PARTS Clean

Looks like new! Well almost…

Hope this helps someone.

Lee APP replacement parts site: https://leeprecision.com/deluxe-automatic-processing-press-app-parts/