TM 1-1520-238-23
6-188
Change 9
6.38.
ENGINE NOSE GEARBOX OUTPUT SEAL ASSEMBLY REMOVAL/INSTALLATION
6.38.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
6.38.2. Initial Setup
Tools:
Aircraft maintenance tool kit (item 372, App H)
Light duty laboratory apron (item 27, App H)
Industrial faceshield (item 129, App H)
0.000 - 0.125-inch dial indicator depth gage (item 145,
App H)
0.002 - 0.040-inch gap setting gage (item 147, App H)
Chemical protective gloves (item 154, App H)
Adjustable air filtering respirator (item 262, App H)
30 - 150 inch-pound 3/8-inch drive click type torque
wrench (item 441, App H)
Materials/Parts:
Bolt (NAS 564-33) (2)
Packing (4)
Self-locking nut (6)
Assembly fluid (item 30, App F)
Cloth (item 52, App F)
Lubricating oil (item 119, App F)
Sealing compound (item 177, App F)
Patient examining gloves (item 83, App F)
Personnel Required:
68D
Aircraft Powertrain Repairer/NDI
67R3F
Attack Helicopter Repairer/Technical
Inspector
References:
TM 1-1500-204-23
Equipment Conditions:
Ref
Condition
2.123
Engine nose gearbox fairings and shrouds
removed
6.2
No. 1 or No. 2 drive shaft removed
NOTE
This task is typical for either No. 1 or No.
2 engine nose gearbox output seal as-
sembly.
6.38.3. Removal
a. Remove retainer (1) from engine nose gear-
box (2).
(1) Remove six self-locking nuts (3) and washers
(4) from gearbox (2) studs.
(2) Discard nuts (3).
(3) Remove sealing compound from two nylon
setscrews (5).
(4) Remove two nylon setscrews (5) from retain-
er (1).
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