TM 1-1520-238-23
Change 5
5-208.11
5.46C.
MAIN ROTOR LOWER BEARING GREASE REPACKING (AVIM)
5.46C.1. Description
This task covers:
Removal. Cleaning. Inspection. Servicing. Installation
5.46C.2. Initial Setup
Tools:
Aircraft maintenance tool kit (item 372, App H)
Light duty laboratory apron (item 27, App H)
Chemical protective gloves (item 154, App H)
1 3/4 & 2 3/4-inch rubber mallet (item 213, App H)
Adjustable air filtering respirator (item 262, App H)
1/4-inch - 20 socket head cap screw (item 274, App H)
Materials/Parts:
Cloth (item 50, App F)
Cloth (item 52, App F)
Depressor (item 70, App F)
Grease (item 87, App F)
Methyl ethyl ketone (item 124, App F)
Pad (item 130, App F)
Sealing compound primer (item 146, App F)
Sealing compound (item 167, App F)
Personnel Required:
68D
Aircraft Powertrain Repairer/NDI
67R3F
Attack Helicopter Repairer/Technical
Inspector
Equipment Conditions:
Ref
Condition
5.46B
Main rotor upper bearing inner race/rollers
removed
WARNING
FLIGHT SAFETY PART
The main rotor lower bearing is a flight
safety part. Failure to follow
maintenance instructions may result
in serious injury or death of
crewmembers and/or serious damage
to the helicopter.
CAUTION
Wear cotton gloves when handling
main rotor lower bearing inner race/
rollers. Failure to do so will result in
damage to bearing.
Lower bearing inner race/rollers must
be protected from local environmental
contamination and external impact
during inspection and other handling.
Failure to do so will result in damage to
bearing.
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M04-5168-1
