T-45C TS, ADV & IUT ENG-09
Hydraulic System
(2) Physical
(a) Thermal relief valve
(b) Spool valve
(c) Solenoid valve (reset)
(d) Restrictor
NOTE: This group of valves combines
to determine change over pressure
between the HYD 2 EDP and
emergency hydraulic system.
Overlay 5
5.
EDP bypass valve
EDP Bypass Valve
a.
Location: bottom, left aft fuselage
b.
Description
(1) Reduces load on engine during start by
bypassing output of EDP to return side of
system
(2) Bypass in effect when engine below
42% rpm, e.g., start, flameout
(3) Can be reset when engine is above
45% rpm by pressing HYD 2 RESET button
C.
HYD 2 operational characteristics 1.4.8.2.2
Sg 3, fr 5, p 1
Hydraulic System
1.
Input power: supplied by EDP
Block Diagram
(3 Overlays)
a.
EDP receives hydraulic fluid from HYD 2
system reservoir
b.
HYD 2 EDP also produces 3000 psi but at
reduced (6 gpm) flow because of smaller load
c.
Bypass valve controls output of EDP
(9-98) Change 1
Page 9-21
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