TM 55-1520-240-23-3
4-37
INSPECT AFT ENGINE MOUNT LINK AND ADAPTER PARTS
(Continued)
4-37
INSPECT AFT ENGINE MOUNT LINK AND ADAPTER
WITHOUT 57
1.
Clean link (1), four bushings (2 and 2.1), two bolts
(3 and 3.1), adapter (4), adapter bolt (5), and aft
engine mount lugs (6) on structure. Use solvent
(E162) and cloth (E135). Wear gloves (E186.1).
2.
Inspect link (1), four bushings (2 and 2.1), two
bolts (3 and 3.1), bolt (5), and adapter (4).
There shall be no cracks, gouges, scratches,
or dents, which exceed 10 percent of material
thickness or 0.040 inch, whichever is less. If a
crack is suspected in the aft engine mount link
or the aft engine mount adapter, refer to TM
1-1520-253-23.
3.
Inspect spacer (7), four washers (8), and two
nuts (9) for obvious damage.
NOTE
During the inspection of the aft
engine mount lugs, inspect for cracks
originating from the inboard lug recess
at the bolt hole.
4.
Inspect lugs (6) on structure. There shall be no
cracks, gouges, scratches, or dents deeper than
0.040 inch.
5.
Measure inside diameter of four bushings (2).
Diameter shall not be more than 0.502 inch.
6.
Measure inside diameter of two bearings (10).
Bearing diameter shall not be more than 0.500
inch.
7.
Measure shank diameter of two bolts (3 and 3.1).
Diameter shall not be less than 0.495 inch.
8.
Use a dial indicating scale to apply a 25 to 50
pound load to bearing (10) in axial direction.
Apply a 25 to 50 pound load to bearing (10) in
opposite direction. Measure axial play. Play shall
not be more than 0.030 inch.
9.
Apply a 25 to 50 pound load to bearing (10) in
radial direction. Apply a 25 to 50 pound load to
bearing (10) in opposite direction. Measure radial
play. Play shall not be more than 0.006 inch.
10.
Repeat steps 8 and 9 four times for each bearing
(10). Rotate bearing 90º each time.
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