Section I. OPERATING PROCEDURES
If equipment fails to operate, refer to trouble-
shooting procedures in chapter 3.
a. The instructions in this section are pub-
lished from the information and guidance of
personnel responsible for operating the filter-
b. It is important that the operator know
how to perform every operation of which the
filter-separator is capable. This section gives
instructions on starting and stopping the equip-
ment and detailed operating instructions. Since
nearly every job presents a different problem,
the operator may have to vary the given pro-
cedure to fit the individual job.
Operate filter-separator only in the up-
right position. If unit tips over during
operation, stop operation at once. Up-
right and drain unit and allow to dry be-
fore continuing operation.
Perform the daily preventive maintenance
checks and services, table 3-1. Prior to start-
ing, the external valve between the pump and
filter-separator inlet should be completely closed
and the air vent valve open.
for location and purpose of the air vent valve,
drain valve, differential pressure indicator, and
This procedure will prevent dam-
age to the filter coalescer elements from sud-
den fuel surges into an empty or partially filled
vessel on pump startup.
Gradually open ex-
ternal valve and fill vessel slowly until all air is
expelled and fuel flows from air vent valve (fig.
2-1 ). Close air vent valve and open ex-
ternal valve to full flow rate. If the red indicator
signal button on the differential pressure indica-
tor pops up (fig. 2-1 ) during starting, re-
set button by pushing downward into body after
system is operational. It is mandatory that the
performance of filter/separators on all aircraft
refueling equipment be checked every 30 days
through the submission of samples taken from
the effluent stream of the filter/separators. Upon
request, the petroleum representative will furnish
sample containers to components of the Army,
Army National Guard, or Reserve operating air-
craft refueling equipment. Samples will be sent to
the petroleum laboratory designated by the pe-
troleum representative. In the event a sample
indicates unsatisfactory performance of filter/
separator equipment, the submitting activity will
be notified by telephone and will be advised to
change the filter-separator elements. (AR 703-1,
1 Apr 1971).