TM 10-4930-220-13&P
b. Inspection, Cleaning, and Replace.
(1) Remove manhole cover (para 4-11)
(2) Drain tank completely.
NOTE
Testing to determine If tanks are safe for entry will be performed only by tech-
nically qualified safety or health personnel.
(3)
Perform pre-entry testing for air contaminants and oxygen deficiency by technically qualified per-
sonnel.
(4)
Enter tank through manhole opening and loosen setscrew (2).
(5)
Unscrew collar (3) from support (9).
(6)
Remove rod and handle (6).
(7) Transfer parts to a well ventilated area outside the tank. Clean all parts with an approved cleaning
solvent and dry thoroughly.
(8)
Inspect all parts for breaks, cracks, and damaged threads.
(9)
Replace damaged parts or valve assembly.
(10) Place rod and handle (6) into position through collar (3) and support (9).
(11) Tighten setscrew (2).
(12) Install manhole cover (para 4-11).
4-14. Emergency Dump Valve Assembly.
This task covers: a.
Inspection b. Cleaning c. Replace
INITIAL SET UP
Tools
Tool Kit, General Mechanic’s (Appendix B, Section Ill, item 2)
Materials
Cleaning Solvent (Appendix E, Section II, item 1)
Rags, Wiping (Appendix E, Section II, item 3)
a.
General. The emergency dump valve is used for dispensing liquid from the Tank Unit.
Figure 4-5. Emergency Dump Valve Assembly.
Change 1
4-13
