TM 1-1520-238-23
(6-297 blank)/6-298
Change 6
6.68.
MAIN TRANSMISSION ROTOR BRAKE ACTUATOR (GOODYEAR/ABSC)
DISASSEMBLY/ASSEMBLY (AVIM)
6.68.1. Description
This task covers:
Disassembly. Cleaning. Inspection. Assembly. Testing.
6.68.2. Initial Setup
Tools:
Hydraulic tool kit (item 384, App H)
#16 spline x 3/8-inch drive torque wrench adapter
(item 17, App H)
Light duty laboratory apron (item 27, App H)
4-inch vise jaw caps (item 59, App H)
9/16 x 1/4-inch drive open end box socket wrench
crowfoot attachment (item 85, App H)
Industrial faceshield (item 129, App H)
0.002 - 0.040-inch gap setting gage (item 147, App H)
0.0015 - 0.0250-inch thickness gage (item 152, App H)
Chemical protective gloves (item 154, App H)
3/16 x 3 1/2 inch long drift pin punch (item 249, App H)
Tube reducer (item 254, App H)
Adjustable air filtering respirator (item 262, App H)
Hydraulic test stand (item 357, App H)
#5 & #6 stud installing tool kit (item 387, App H)
4-inch machinist’s vise (item 402, App H)
Rotor brake socket spanner wrench (item 432, App H)
10 - 50 inch-pound 1/4-inch drive click type torque
wrench (item 434, App H)
30 - 150 inch-pound 1/4-inch drive click type torque
wrench (item 435, App H)
0 - 300 inch-pound 3/8-inch drive click type torque
wrench (item 439, App H)
Brake Disk Test Segment (Figure D-473, App D)
Materials/Parts:
Bolt (NAS 149-68 for testing) (2)
Friction lining screen
Nipple
Nut (HS 4143-7 for testing) (2)
Packing (5)
Washer (MS20002C9 for testing) (4)
Cotton gloves (item 82, App F)
Hydraulic fluid (item 92, App F)
Sealing compound (item 168, App F)
Personnel Required:
68H
Aircraft Pneudraulics Repairer
67R3F
Attack Helicopter Repairer/Technical
Inspector
WARNING
FLIGHT SAFETY PART
The rotor brake actuator 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.
NOTE
Disassembly, cleaning, inspection, and assembly procedures in this task are typical for both rotor
brake actuator cylinder halves.
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