TM 1-1520-238-23
Change 6
4-274.1
4.85A.
NO. 1 OR NO. 2 AFT ENGINE MOUNT SUPPORT BEARING REPLACEMENT (AVIM)
4.85A.1. Description
This task covers:
Removal. Cleaning. Inspection. Installation.
4.85A.2. Initial Setup
Tools:
Aircraft mechanic’s tool kit (item 376, App H)
Light duty laboratory apron (item 27, App H)
0.000 - 6.000-inch outside micrometer caliper set
(item 52, App H)
0.6300 - 1.0000-inch cylinder gage (item 142, App H)
Chemical protective gloves (item 154, App H)
Heat protective gloves (item 155, App H)
Electric gun type heater (item 163, App H)
2-ton hydraulic hand operated arbor press (item 235,
App H)
Universal puller kit (item 241, App H)
Adjustable air filtering respirator (item 262, App H)
0 - 30 inch-pound 1/4-inch drive dial indicator torque
wrench (item 445, App H)
Materials/Parts:
Brush (item 34, App F)
Carbon dioxide (item 40, App F)
Primer coating (item 147, App F)
Personnel Required:
67R
Attack Helicopter Repairer
67R3F
Attack Helicopter Repairer/Technical
Inspector
References:
TM 1-1500-204-23
TM 55-1500-322-24
Equipment Conditions:
Ref
Condition
4.85
No. 1 or No. 2 aft engine mount support
removed
NOTE
This task is typical for No. 1 or No. 2 aft
engine mount support bearing.
4.85A.3. Removal
a. Remove and discard bearing (1) from engine
mount (2) mating bore (3). Use puller kit
(TM 55-1500-322-24).
4.85A.4. Cleaning
a. Clean mount (para 1.47).
GO TO NEXT PAGE
MO4-5159-1
2
3
1
