TM 1-1520-238-23
Change 5
1-114.7
1.35.
HYDRAULIC SYSTEM BLEED – continued
(2) Disconnect return “Y” hose (1) from utility re-
turn coupling (3). Install cap (5).
(3) Slowly increase AGPU output pressure to
250 psi (TM 55-1730-229-12). Do not ex-
ceed 400 psi.
(4) Hold pressure until overflow drain fluid is free
of air bubbles.
(5) Reduce AGPU output pressure to 0 psi
(TM 55-1730-229-12).
(6) Disconnect pressure “Y” hose (7) from utility
pressure coupling (9). Install cap (11).
aw. Connect return “Y” hose (1) and (2) to utility
return coupling (3) and primary return cou-
pling (4).
(1) Remove caps (5) and (6).
ax. Pressurize primary and utility hydraulic man-
ifold by applying external power – air (para
1.71).
ay. Operate air pressure until primary and utility
manifold piston indicator is in normal operat-
ing range (para 1.34).
az. Remove external power – air (para 1.71).
ba. Disconnect return “Y” hose (1) and (2) from
utility return coupling (3) and primary return
coupling (4).
(1) Install caps (5) and (6).
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M04-1611-13A
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M04-1611-40
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