TCH.1C-27J-2-29JG
1-2.2
HOSES (Cont'd)
1.The hoses are in Polytetrafluorethylene, covered with
one or more layers of stainless steel braid. They are
equipped with stainless steel swaged fittings, except
for the suction and case drain line hoses which are
equipped with a combination of aluminium and
corrosion resistant steel swaged fittings. In the
hydraulic system are used two types of hoses: one
high pressure used for pressure and actuators lines.
Precisely, EDP and ACMP delivery lines, NLG
actuator, MLG actuators and MLG downlocks supply
lines and the other, one medium pressure, used for
EDP and ACMP suction and case drain lines.The use
of flexible hoses in the hydraulic system is restricted
to units whose movement does not permit the use of
rigid lines, or where vibration would weaken rigid
tubes, or where disconnections are frequently made. It
is important that flexible hoses be closely inspected at
frequent intervals, since damaged or deteriorated
hose and loose connections are causes for excessive
leakage. Flexible hoses are provided with a
lengthwise marking that must always be straight after
installation. This is important as pressure tends to
straighten hose. If hose is twisted, it will tend to shear
off hose or loosen fittings. If clamps are used, ensure
that hose is not pulled, twisted, or forced to bend into
a sharp radius while in service.
(Cont'd)
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