The can-holder and handle assemblies are
mounted above the 2-gallon reservoir. The can holder
positions the installed l-gallon fluid container directly
above the reservoir. Also, it provides a means of
placing the handle assembly over the container top.
The handle assembly is hinged to a bracket on the
can-holder assembly. It has a spring-loaded latch to
lock the handle in the closed position. In addition to
the carrying handle, the handle assembly contains an
upper can piercer, a vent check valve, and a filter. A
vent hose is connected between the top of the reservoir
(sight gauge) and the upper can piercer.
Fluid is delivered by a hand pump. The pump can
deliver 1.5 fluid ounces per full stroke at 0 to 250 psi.
The pump is operated with a sliding pump handle,
which is held in the extended or retracted position by
a spring-loaded ball detent. The 3-micron filter on the
pump base removes particulate contamination from
the hydraulic fluid being delivered to the suction side
of the pump. The filter unseats a shutoff valve, which
closes the suction port when the filter element is being
The HSU-1 service unit has a 7-foot service hose
connected to the units fluid output port at the pump
assembly. The hose assembly ends with a short
bent-tube assembly for direct connection to fill fittings
on the aircraft or components being serviced. A
3-micron, in-line filter located between the hose end
and the tube prevents reverse-flow contamination and
serves as a final filter. When the fluid service unit is
not in use, it is stored by wrapping the hose assembly
around the can-holder assembly and fastening the tube
end to the hose storage fitting on the base. This keeps
contaminants from entering the hose while the unit is
not in use.
Q17. The air pressure in aircraft tires must be checked
Q18. Why is it important for the operator of the remote
inflator unit to stand directly fore or aft of the tire
Q19. Why must a tire be deflated prior to removing a
wheel assembly from an aircraft?
Q20. Liquid oxygen converters are refilled by
personnel from what rating?
Q21. The high-pressure air valve, shown in figure 5-8.
is used on most naval aircraft for what purpose?
Q22. What purpose does the purifier serve on the
nitrogen servicing trailer?
Q23. What is the holding capacity of the fluid servicing
LEARNING OBJECTIVE: Identify safety
precautions used when working around aircraft
on the flight line and aboard ship.
Safety is the responsibility of everyone in the
Navy. You are responsible for your own safety, and,
as a sailor, you have the moral responsibility for the
safety of your shipmates. As a plane captain, you will
be exposed to dangerous situations. In fact, many
insurance companies rate flight line operations and, in
particular, the flight deck environment among the
most dangerous jobs in the world. The following text
will introduce you to some of the many hazards of your
LINE SAFETY PRECAUTIONS
In addition to the more specific safety precautions
presented in various sections of this chapter, there are
a number of miscellaneous precautions that you must
observe when working on the aircraft flight line and
the carrier flight deck. The following precautions are
of special importance to ensure your safety as well as
the safety of your coworkers.
Propellers and Rotors
When working on the line around propeller-driven
aircraft or helicopter rotors, the first general
precaution that you must observe is to BEWARE OF
PROPELLERS. When you see a propeller, let it be a
constant reminder to STAY CLEAR! In general, do
not cross in front of moving propellers because they
are not easily seen. A good habit is to always walk
around propellers. Unless you are inspecting or
performing maintenance on the propeller blades,
NEVER walk through a prop arc, even when it is not
operating. The area around the aircraft must be kept
clear of loose gear and debris.
Maintenance of jet engines presents major
hazards. The air intake duct of operating jet engines
represents an ever-present hazard to personnel
working near the inlet duct of the aircraft. It can also
be a hazard to the engine itself if the turnup area around
the front of the aircraft is not kept clear of debris. Jet