4-16.WATER DRAIN VALVE AND PIPING REPLACEMENT
This task consists of:
General Mechanics Tool Kit (Appendix B, Section
III Item 1)
Pipe wrenches (2)(Appendix B, Section III, Item
Thread Sealant (Appendix F, Section II, Item 2)
General Safety Instructions
Filter-separator removed from system, tank
drained and water drain valve open. Refer to
para 2- 6.
· Do not smoke within 100 feet of filter-separator.
Air duct disconnected from defrost shroud
· Fuel is toxic to skin, eyes, and respiratory tract.
inlet. Refer to para 2-6.
· Sealant istoxic to skin, eyes, and respiratory tract.
Defrost door removed from shroud. Refer to para
Refer to figure 4-7.
Hold pipe nipple (1) in place with a pipe wrench and remove elbow (2).
Remove pipe nipple (1) from drain valve (3).
Remove drain valve (3) from pipe nipple (4).
Remove pipe nipple (4) from elbow (5).
Remove elbow (5) from sump cover (6).
Do not apply excessive pressure with fingers when cleaning or applying sealant onto threads.
Sharp threaded edges could cause injury.
Coat threads of elbow (5) with sealant and install into sump cover (6).
Make sure arrow marked on drain valve body points away from tank sump.
Coat threads of pipe nipple (4) and install into elbow (5).
Install drain valve (3) on pipe nipple (4).