TM-9-2330-356-14
SEMITRAILER, TANK: 5000 GALLON, BULK HAUL, SELF LOAD/UNLOAD M967 AND M967A1; SEMITRAILER, TANK: 5000 GALLON, FUEL DISPENSING, AUTOMOTIVE M969 AND M969A1; SEMITRAILER, TANK: 5000 GALLON, FUEL DISPENSING, UNDER/OVERWING AIRCRAFT M970 AND M970A1
TECHNICAL MANUAL; OPERATOR’S, UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL
OCTOBER 1990
TM-9-2330-356-14 - Page 456 of 528
TM 9-2330-356-14
8-17. Manifold Drain Valve (Fig. 8-21)
c.
Cleaning and Inspection.
NOTE
It is not necessary to remove valve to replace
packing.
a.
Removal.
Remove valve (para 4-90).
b. Disassembly.
(1) Secure valve.
(2) Loosen packing nut (1) and turn hand wheel
(2) counterclockwise to force packing (3) and packing
gland (4) free of bonnet (5).
(3) Remove nut (6) and hand wheel (2).
(4) Remove packing nut (1), packing gland (4),
and packing (3).
TA502312
Figure 8-21. Manifold Drain Valve.
WARNING
Dry cleaning solvent P-D-680 is toxic and
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.
The solvent’s flash point is 100°F-138°F
(38°C-59°C). If you become dizzy while
using cleaning solvent, immediately get fresh
air and medical help. If solvent contacts eyes,
immediately wash your eyes with water and
get medical aid.
(1) Clean all metal parts in dry cleaning solvent
(item 11, Appendix E) and dry thoroughly.
(2) Inspect for cracks in valve.
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).
e.
Installation.
Install valve (para 4-90).
8-18. Filter/Separator Automatic Drain Valve
(M969, M969A1, M970, and M970A1)
(Fig. 8-22)
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
problem is in the separator control valve.
8-26
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