CHAPTER 9: MAINTENANCE OF HULL- AND CAB-RELATED COMPONENTS
TM 9-2350-256-20
9-68 REPLACE/SERVICE DRAIN VALVES Continued
a. REMOVAL
Remove drain valve assembly (1) by removing six
screws (2) and six lockwashers (3).
b. DISASSEMBLY
1
Place drain valve assembly (1) on flat surface with
valve stem (4) up.
2
Press down on actuating spring (5) and remove
spring pin (6).
3
Remove valve cap (7), actuating spring (5), and
valve cage (8) from valve (9).
c. INSPECTION
1
Inspect valve cage (8) for cracks, warping, and
scored bearing and mating surfaces. Replace if
worn or damaged.
2
Inspect valve stem (4) for scored bearing surface,
bends, cracks, nicks, dents, and corrosion. Replace
if worn or damaged.
3
Inspect actuating spring (5) for signs of fatigue,
damage, or deformation. Replace if damaged or
deformed.
4
Inspect valve (9) bearing for nicks, dents, scored
bearing surface, and out-of-roundness. Replace if
defective.
d. ASSEMBLY
1
Install valve cap (7), actuating spring (5), and valve
cage (8) on valve (9).
2
Place drain valve assembly (1) on flat surface.
Press down on actuating spring (5) and install new
spring pin (6).
e. INSTALLATION
Install drain valve assembly (1) on underside of vehicle
with six screws (2) and six new lockwashers (3).
9-136