Doors: Description and Operation

The mechanical components of the door are lubricated during assembly. If additional lubrication is required to any door hardware mechanism, use Lubriplate Spray-Lube "A", Lubriplate Auto-Lube "A," or equivalent. Lubricate door hinge pins and rollers at normal service intervals with 30-weight engine oil. Do not lubricate the surface of the hinge roller that makes contact with the hold-open link. This may prevent the roller from rolling properly.