Figure 9-2.--Model HSU-1 fluid service unit.
the hose assembly around the can holder assembly and
to 250 psi. The pump is operated with a sliding pump
fastening the tube end to the hose storage fitting on the
handle, which is held in the extended or retracted
base.
position by a spring-loaded ball detent. A replaceable
3-micron (absolute) disposable filter on the pump base
Model 310 Fluid Service Cart
removes particulate contamination from the hydraulic
fluid being delivered to the suction side of the pump.
The Model 310 fluid service cart (fig. 9-3) is a
The filter unseats a shutoff valve, which closes the
hand-propelled, mobile unit designed to service
suction port whenever the filter element is being
aircraft hydraulic systems with fluid obtained directly
replaced.
from the 10-gallon container. It can be operated by one
person, and it is used in those applications where the
The HSU-1 service unit is equipped with a 7-foot
fluid capacity of the H-250-1 servicing unit (1 gallon)
service hose connected to the unit's fluid output port at
or HSU-1 servicing unit (3 gallons) is inadequate. The
the pump assembly. The hose assembly ends with a
hand pump is used to deliver 3-micron (absolute)
short bent-tube assembly for direct connection to fill
filtered fluid.
fittings on the aircraft or components being serviced.
A 3-micron, in-line filter is located between the hose
The main frame assembly of the fluid service cart
end and the tube. This prevents reverse-flow
consists of a two-wheel dolly having a tubular handle
contamination and serves as a final filter. When the
extending outward so you can hand push (or pull) the
fluid service unit is not in use, it is stored by wrapping
cart. The frame contains an inner bridle, which, with
9-3
