TM 1-1520-238-23
Change 5
1-114.5
1.35.
HYDRAULIC SYSTEM BLEED – continued
ak. Repeat step ab.(1) and (2) to articulate pylons
and flight controls 10 complete cycles.
al. Perform area weapon system power down
(TM 9-1090-208-23).
am. Perform APU power down (para 1.75).
an. Connect AGPU return hose (13) to return “Y”
hose coupling (14).
(1) Remove cap (15) from “Y” hose coupling
(14).
(2) Turn coupling nut (16) clockwise until seated
and locking teeth engage fully with teeth on
“Y” hose coupling (14).
ao. Connect AGPU pressure hose (17) to pres-
sure “Y” hose coupling (18).
(1) Remove cap (19) from “Y” hose coupling
(18).
(2) Turn coupling nut (20) clockwise until seated
and locking teeth engage fully with teeth on
“Y” hose coupling (18).
CAUTION
Hydraulic pressure is 3000 psi. This can
cause injury. If injury occurs, seek medi-
cal aid.
ap. Apply hydraulic pressure to helicopter.
(1) Adjust AGPU output pressure to 3000 psi
(TM 55-1730-229-12).
aq. Turn AGPU low pressure bleed valve 1/4 turn
open
(CCW)
for
system
bleed
(TM 55-1730-229-12).
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