TM 9-2330-356-14
c.
Cleaning and Inspection.
NOTE
WARNING
It is not necessary to remove valve to replace
Dry cleaning solvent P-D-680 is toxic and
packing.
flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat.
b. Disassembly.
The solvent's flash point is 100F-138F
(38C-59C). If you become dizzy while
(1) Secure valve.
using cleaning solvent, immediately get fresh
air and medical help. If solvent contacts eyes,
(2) Loosen packing nut (1) and turn hand wheel
immediately wash your eyes with water and
(2) counterclockwise to force packing (3) and packing
get medical aid.
gland (4) free of bonnet (5).
(1) Clean all metal parts in dry cleaning solvent
(3) Remove nut (6) and hand wheel (2).
(item 11, Appendix E) and dry thoroughly.
(4) Remove packing nut (1), packing gland (4),
(2) Inspect for cracks in valve.
and packing (3).
d. Assembly.
(1) Install packing (3), packing gland (4), and
packing nut (1). Tighten packing nut two full turns.
(2) Assemble hand wheel (2) and nut (6).
(M969, M969A1, M970, and M970A1)
a.
Test. A leak from the drain valve is an indication
that either the diaphragm valve or the separator control
valve is leaking. To determine which valve is leaking:
(1) Disconnect the tube fitting at rear of
diaphragm assembly (fig. 8-22).
(2) Dispense fuel through filter/separator and
visually watch for leakage.
(3) If leakage continues, the problem is in the
diaphragm valve and could be:
(a) Dirt under seat.
(b) Damaged O-rings.
(c) Stem hanging up. If the stem is hung up, a
moderate blow with a rawhide mallet to the bottom cap of
the diaphragm valve might free the sticking stem.
(d) Vent plugged. If vent is plugged, clean
hole in vent plug (fig. 8-22) with a .020- to .030-inch
diameter wire.
(4) If leaking stops, this is an indication that the
TA502312
problem is in the separator control valve.
