TM 9-2330-356-14
(b) Close the emergency valve.
WARNING
(c) Loosen jam nut and turn adjusting nut _
Dry cleaning solvent P-D-680 Is toxic and
flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated
(d) Tighten jam nut.
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO
(e) Open emergency valve and ensure that
NOT use near open flame or excessive heat.
emergency valve vent also opens.
The solvent's flash point is 100F-136F
(38C-59C). If you become dizzy while
Float Assembly
using cleaning solvent, immediately get fresh
air and medical help. If solvent contacts eyes,
WARNING
Immediately wash your eyes with water and
get medical aid.
Do not climb into tank unless Interior of tank
has been drained and purged and an
c.
Cleaning and Inspection. Clean vent assembly with
explosive meter check Indicates it is safe to
dry cleaning solvent (item 11, Appendix E). Inspect O-ring
do so. Adequate forced air ventilation or
under vent cap for physical damage. Inspect for broken or
self-contained breathing apparatus must be
damaged spring. Inspect gasket for physical damage.
used. Person entering tank must have an
Discard if damaged.
attached lifeline. An observer must be
stationed at the manhole opening so that
Installation.
d.
assistance may be summoned in the event of
an emergency. Failure to follow this warning
(1) Install tube and connector into adapter. Hold
may result in serious injury or death to
in place by hand.
personnel.
(2) Position gasket on top of vent mounting
a.
General.
flange on top of tank. Lower vent into place on top of tank,
aligning the connector with the vent. Hold complete
(1) The float assembly is located inside the
assembly in place and install eight capscrews.
semitrailer tank. It can only be removed by a person from
inside the tank.
Adjustment.
e.
(2) Before the float assembly can be removed,
(1) Emergency valve vent must be open
the fuel must be drained from the semitrailer tank and the
whenever the emergency valve is opened.
interior must be purged. For draining and purging
instructions refer to Section XX, Chapter 4.
(2) If vent does not open, adjust vent as follows:
b.
Float Replacement (Fig. 8-13).
(1) Disconnect the two tubes (1 and 2) from the
WARNING
elbows (3 and 4). Be sure not to lose the two inserts (5 and
6).
Do not climb into tank unless interior of tank
has been drained and purged and an
(2) Remove capscrew (7), flatwasher (8), and
explosive meter check indicates It Is safe to
float valve (9).
do so. Adequate forced air ventilation or
self-contained breathing apparatus must be
(3) Remove bushing (10), elbow (3), bushing (11),
used. Person entering tank must have an
elbow (4), and bushing (12).
attached lifeline. An observer must be
stationed at the manhole opening so that
(4) Replace bushing (10), elbow (3), bushing (11),
assistance may be summoned In the event of
elbow (4), and bushing (12) on the float valve (9).
an emergency. Failure to follow this warning
may result In serious injury or death to
(5) Install float valve (9) onto the mounting
personnel.
bracket with capscrew (7) and washer (8).
(6) Reconnect the two tubes (1 and 2) to elbows (3
(a) Adjustment must be done from inside
and 4). Be sure inserts (5 and 6) are in place in tubes.
tank.
