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TM 10-4930-229-12&P
NOTE
The operational schematic in figure 2-4 shows the FARE pumping fuel from a
500-gallon (1892.5 liter) drum and distributing through two branch lines. Setup as
shown, the system requires a minimum of two men for simultaneous two-point
refueling and a third man or tender stationed at the pump and filter/separator. If
manpower is critically short, it is possible for one man to operate the equipment with
assistance of the crew from each helicopter being refueled. Many variations are
possible, depending on specific need.
(1) Select a site that will provide relatively level terrain. Clear away dry leaves, grass and brush from the
site. The position and kind of accessory components is determined by the type of operation desired.
CAUTION
Join caps and plugs together at each mating connection to avoid contamination.
(2) Position the pump/engine and filter/separator assemblies for the desired refueling operation.
Remove the dust caps and plugs and complete the installation of hoses, valves and fittings. Install
butterfly valves with arrows in the direction of flow.
b. Grounding Procedures.
WARNING
DEATH or serious injury may result if proper grounding procedures are not followed
prior to operating the equipment.
Extreme care must be taken to prevent injury to fingers or hands when driving the
ground rods. Do not place hands between the ram and drive collar. Gloves should be
worn. Be sure all connections are tight to avoid a possible spark between the units
and ground rod.
NOTE
Grounding of equipment is a means to provide a conductive path into the ground so a
static charge isn’t trapped on the surface of the equipment where it could discharge
as a spark
(1) Drive Grounding rod (2) into ground to the required depth (see table 2-2). Grounding rod (2) can be
used as a nozzle hanger and/or a grounding rod.
(2) Remove pumping assembly and filter separator grounding rod (7) from filter separator frame. Drive
grounding rod into ground to the required depth (see table 2-2). Connect grounding cables from
pumping assembly (6) and filter separator (8) to grounding rod (7). The refueler and system are now
grounded and the fueling process may begin.
(3) Prime the pump and start the engine (paragraph 2-12).
Table 2-2. Required Depths for Ground Rods
Type of soil
Depth of Ground Rod
(4)
Coarse ground, cohesionless sands and gravels
Inorganic clay, claying gravels, gravel-sand-day,
claying sands, sandy day, gravelly clay, and silty
c l a y
Silty gravel, gravel-sand-silt, silty sand, sand, silt,
peat, muck, and swamp soil
6 feet
4 feet
3 feet
Methods of Grounding. There is no quick or easy way to test the adequacy of a ground. The testing
procedures (See FM 10-68 Appendix E) are complex and the equipment is bulky and expensive;
Therefore, several levels or methods of grounding and bonding are required to meet the various
operational needs of the Army. The three methods/levels are listed in order of preference.
Change 3
2-11
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