Place drain valve assembly (1) on flat surface with valve stem (4) up.
Press down on actuating spring (5) and remove spring pin (6).
Remove valve cap (7), actuating spring (5), and valve cage (8) from valve (9).
Inspection-Acceptance and Rejection Criteria
Inspect valve cage (8) for cracks, warping, and scored bearing and mating surfaces. Replace if worn or damaged.
Inspect valve stem (4) for scored bearing surface, bends, cracks, nicks, dents, and corrosion. Replace if worn or damaged.
Inspect actuating spring (5) for signs of fatigue, damage, or deformation. Replace if damaged or deformed.
Inspect valve (9) bearing for nicks, dents, scored bearing surface, and out-of-roundness. Replace if defective.