TM 55-1520-240-23-4
5-22
REMOVE PITCH-VARYING HOUSING
5-22
INITIAL SETUP
Applicable Configurations:
All
Tools:
Powertrain Repairer’s Tool Kit, NSN
5180-00-003-5267
Container, 2 Quart
Phenolic Drift, 3/4 Inch X 12 Inches
Crow’s Foot, 7/16 Inch
Materials:
Cloth (E120)
Grease (E190)
Paper Tag (E264)
Barrier Material (E80)
Tape (E404 thru E409, As Required)
Personnel Required:
Aircraft Powertrain Repairer (2)
Equipment Condition:
Battery Disconnected (Task 1-39)
Electrical Power Off
Hydraulic Power Off
One Forward and One Aft Rotary-Wing Blade Tied
Down (Task 1-26)
Work Platform Open (Task 2-2)
Rotary-Wing Blade Removed (Task 5-64)
Remove Pitch Link (Task 5-97)
NOTE
Remove pitch-varying housing only if
the same housing will be installed.
Installation of a replacement housing
is not permitted at this level.
Procedure is same to remove any
pitch-varying housing on forward
or aft rotary-wing head except as
noted. Forward head is shown here.
Procedure may be done with head on
or off helicopter.
1.
Remove lockwire from filler plug (1). Remove
plug and packing (2).
2.
Remove lockwire from lower plug (3). Remove
plug and packing (4).
3.
Drain oil. Use container and cloth (E120). Raise
pitch housing (5).
NOTE
Balance weights are not installed on
red housing.
4.
Remove nut (6), washer (7), and balance weights
(8, 9, 10) from pitch housing (5).
5-111
