TM 1-1520-238-23
Change 8
6-389
6.89.
MAIN TRANSMISSION HYDRAULIC PUMP SEAL REPLACEMENT
6.89.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
6.89.2. 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)
Chemical protective gloves (item 154, App H)
Main transmission seal removal/installation tool (Figure
D-461, App D)
Adjustable air filtering respirator (item 262, App H)
Materials/Parts:
Lubricating oil (item 119, App F)
Sealing compound (item 161, App F)
Personnel Required:
68D
Aircraft Powertrain Repairer/NDI
67R3F
Attack Helicopter Repairer/Technical
Inspector
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
7.4
Primary hydraulic pump removed (as appli-
cable)
7.58
Utility hydraulic pump removed (as applica-
ble)
1.32
Main transmission oil system drained
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