TM 55-1520-240-23-10
16-120
REPLACE EAPS SCAVENGE BLOWER IMPELLAR
16-120
INITIAL SETUP
Applicable Configurations:
All
Tools:
Impellar Extractor Tool (T189)
Mechanic’s Tool Kit, NSN 5180-00-323-4692
Torque Wrench, 0 to 50 Inch-Pounds
Personnel Required:
Medium Helicopter Repairer
Inspector
Equipment Condition:
Remove EAPS (Task 16-109)
Diffuser Duct Removed (Task 16-118)
Remove Scavenge Blower Assembly (Task 16-119)
Battery Disconnected (Task 1-39)
Electrical Power Off
1.
Remove nut (9) and tab washer (10) from blower
shaft. Bend tab so it is flat and horizontal with
washer.
NOTE
If metal where tab attaches to washer
shows sign of cracking from previous
maintenance, replace washer.
2.
Place impeller extractor tool (T189) over shaft
and line up mounting holes.
3.
Screw extractor mounting screws (11) into two
holes on impeller (12).
4.
Turn center bolt (13) in until impeller comes loose
from shaft (14).
5.
Clean woodruff key (15) and shaft and place new
impeller on shaft.
6.
Install tab washer (10) and nut (9). Tighten nut to
20 to 25 inch-pounds using torque wrench. Tab
on washer must align with flat on nut.
7.
Bend tab on washer (10) up against flat on nut.
INSPECT
FOLLOW-ON MAINTENANCE:
Install scavenge blower assembly (Task 16-119).
Install diffuser duct (Task 16-118).
Install EAPS (Task 16-110).
END OF TASK
16-381
