TM 55-1520-240-23-6
7-345
BLEED UTILITY RESERVOIR/COOLER, APU PUMP/MOTOR AND PUMP (WITHOUT
EXTERNAL POWER)
(Continued)
7-345
APU
9.
Loosen nut (15) at SIG port (16) of APU
motor/pump (17). Let fluid flow until air-free.
Tighten nut.
10.
Repeat steps 1 and 2.
11.
Loosen nut (18) at LP port (19) of motor/ pump
(17). Let fluid flow until air-free. Tighten nut.
12.
Repeat steps 1 and 2.
13.
Loosen nut (20) at IN port (21) of utility pump
(22). Let fluid flow until air-free. Tighten nut.
14.
Repeat steps 1 and 2.
15.
Loosen nut (23) of RETURN tube (24) to APU
start accumulator manifold (25). Let fluid flow
until air-free. Tighten nut.
16.
Repeat steps 1 and 2.
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