Before door work can begin the unit must be empty and clear of all obstructions.
Check for these potential problems:
- end of horizontal track covered by sidewall liner, racks, shelves, etc.
- refrigeration unit at end of track
- ceiling not flat (low spots)
- lights in ceiling
- sidewalls narrower than wall to wall where tracks are located
- unit loaded with freight
If any of the above conditions exist, see alternate.
Hint: it may be easier to replace a door when working at the same level as the truck or trailer, such as from a loading dock.