TM 1-1520-238-23
Change 4
6-483
6.115.
MAIN TRANSMISSION INPUT DRIVE CLUTCH REMOVAL/INSTALLATION
6.115.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
6.115.2. Initial Setup
Tools:
Aircraft maintenance tool kit (item 372, App H)
Light duty laboratory apron (item 27, App H)
3-inch x 3/4-inch drive socket wrench extension
(item 123, App H)
Industrial faceshield (item 129, App H)
Aircraft maintenance fixture (item 133, App H)
Chemical protective gloves (item 154, App H)
3/4-inch drive hinged socket wrench handle (item 173,
App H)
100 - 500 foot-pound 3/4-inch drive click type torque
wrench (item 438, App H)
Materials/Parts:
Bolt (MS20074-04-22 for removal)
Packing
Petrolatum (item 138, App F)
Personnel Required:
68D
Aircraft Powertrain Repairer/NDI
67R3F
Attack Helicopter Repairer/Technical
Inspector
References:
TM 1-1520-238-T
TM 9-1090-208-23
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
2.2
Access panels L200 and R200 removed
2.123
Engine nose gearbox fairings and shrouds
removed
6.2
No. 1/No. 2 engine input drive shaft re-
moved
6.3
Main transmission engine input coupling(s)
removed
1.62
Lock rotor brake (if transmission is installed)
6.114
Left or right main transmission primary lube
oil rotary pump removed (if transmission is
removed)
WARNING
FLIGHT SAFETY PART
The main transmission 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.
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