TM 55-1520-240-23-5
6-54
INSTALL AFT ROTOR SHAFT UPPER SEAL (AVIM)
(Continued)
6-54
14.
Install hoisting eye (T32) (18) on shaft (7).
15.
Connect hoist cable (19) to eye of hoisting eye
(T32) (18) marked AFT SHAFT. Have helper
raise hoist to remove slack from cable.
16.
Release clamp (20). Remove plank (21).
17.
Have helper raise shaft (7) to vertical. After 5
minutes, check bottom of bearing retainer (10)
for leaks. There shall be no leaks.
18.
Remove lockwire from pressure switch (22).
Remove pressure switch and packing (23).
19.
Install adapter (24) in housing (1). Install air
charging valve (25) in adapter.
20.
Connect air chuck (26) to valve (25). Apply 3 psi
air pressure to valve. Hold support (1) and turn
shaft (7) one full turn. Wait 5 minutes.
21.
Turn shaft (7) another full turn. Wait 5 minutes.
22.
Check bottom of bearing retainer (10) for leaks.
There shall be no leaks.
23.
Check air pressure in support (1). If pressure
drops from 3 psi, check seal (5) installation.
6-214
