T-45C TS, ADV & IUT ENG-09
Hydraulic System
b.
Wheel brake/emergency flap valve
Overlay 6
Wheel Brake/
(1) Location: bottom, center fuselage
Emergency Flap
(between intakes)
Priority Valve
(2) Description: with HYD 1 system loss,
priority valve disables emergency flap
operation from the wheel brake/emergency
flap accumulator at 2200 psi
(3) Physical: part of multi-valve package
consisting of a priority valve, a thermal
relief valve, and a standby flap system
emergency valve
6.
Hand pump
Overlay 7
Hand Pump
a.
Location: right intake, door labeled HYD HAND
Sg 2, fr 6
PUMP/ GROUND LOCK PINS
Hand Pump (Video)
NOTE: The hand pump is not accessible to the
aircrew from the cockpit.
b.
Description:
(1) Functional: hand pump supplies up to
2800 psi to recharge wheel brake/
emergency flap accumulator without
starting engine or applying external
hydraulic pressure (wheel brakes must be
operative prior to towing aircraft)
(2) Physical
(a) Fixed displacement pump
(b) Detachable handle
LESSON NOTES
The hand pump is operated with a breaker bar with a 1/2-inch
drive, 3-inch extension through an access that is labeled HYD
HAND PUMP.
(9-98) Original
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