SYSTEMS POWERUP (cont)
The aircraft hydraulic system is pressurized
to 3000 psig. Make sure that hydraulic
pressure is released before loosening any
connections. Failure to comply could result
in death or serious injury.
In the event the gun drifts in azimuth during
either aircraft power-up or power-down
sequence, replace the hydraulic solenoid valve
(TM 9-1090-208-23-1) prior to conducting the
d. If hydraulics are required, perform the following
(1) Layout the hydraulic hoses in a manner which
would prevent kinks and loops.
(2) Attach AGPU pressure and return hoses to the
PRIMARY and/or UTILITY couplings on the
aircraft (TM 1-1520-238-23).
(3) Verify all hydraulic hose connections are secured
before applying hydraulic pressure.
(4) Apply hydraulic pressure to the aircraft via the
hydraulic control panel on the AGPU (refer to
TM 55-1730-229-12 for operator and AVUM
maintenance instructions on the AGPU).
Pneumatic hose and coupling fitting become
extremely hot when pneumatic power is
applied. Never touch hose or adapter fitting
until pneumatic power is removed and the
hose and adapter fitting have cooled. Wear
proper gloves and eye protection (goggles
or equivalent) when operating the pneumatic