TM 1-1520-238-23
2-556
Change 3
2.150.
FIREWALL ASSEMBLY NO. 1 OR NO. 2 AFT INBOARD ENGINE MOUNT SUPPORT BEARING
REPLACEMENT – continued
2.150.3. Removal
a. Remove and discard bearing (1) from engine
mount support (2) (TM 1-1500-204-23) Use
puller kit.
2.150.4. Cleaning
a. Clean support bearing bore. Use methyl ethyl
ketone (item 124, App F) and cloth (item 52,
App F).
2.150.5. Inspection
a. Check support for corrosion damage (para
2.129).
b. Check support for cracks.
(1) If cracks are detected, replace support fitting
(TM 1-1500-204-23).
c. Check support bearing bore for elongation.
(1) Measure bearing bore inside diameter in
three places equally spaced apart. Use
caliper.
(2) If average measurement is larger than 0.7530
INCH, and no single measurement exceeds
0.8305 INCH, repair (para 2.150A).
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M04-3632-2
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