Quantcast Main bearing saddle salvage sleeve installation. (cont) - TM-9-2815-226-34-10138

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TM 9-2815-226-34-1
(c) Remeasure diameter of bore to be machined and record dimension.
(d) Determine how large bore is to be cut to accept sleeve using following example:
Diameter of bore before machining
4.752 in.
(120.70 mm)
Thickness of sleeve
+ 0.150 in.
Total of both dimensions
4.902 in.
(124.51 mm)
Subtract 0.025 in. (2.54 mm)
- 0.025 in.
(0.635 mm)
New bore diameter
4.877 in.
(123.88 mm)
When new sleeve is installed, ends of sleeve must protrude slightly over saddle-to-
cap surface. In example above, approximately 0.025 in. (0.635 mm) of sleeve will
protrude over that surface.
(e) Set tool bit using micrometer tool bit setting gage (para 3-9g(2) above). Setting gage establishes a
4.750 in. (120.650 mm) diameter.
(f) Set micrometer to read 4.877 in. (123.875 mm) and set tool bit length accordingly.
(g) Install boring bar feed assembly and cutter holder (para 3-9g(3) above).
Bearing cap is not installed on saddle being bored.
(h) Cut bore (para 3-9g(4) above).
(i) Remove tool bit holder, feed assembly, and boring bar.
(j) Clean bored surface with lintfree cloth.
(k) Place repair sleeve in saddle and check that sleeve oil hole alines with hole in saddle.
(l) Carefully file protruding end of sleeve to be flush with saddle-to-cap surface.


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