Quantcast Main bearing (no. 7) thrust surface repair.

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TM 9-2815-226-34-1
(o) Place 1/8 in. (3.175 mm) drill bit in hand drill.
(p) Set length of bit so that the pin is installed through sleeve into saddle, pin bottoms out in hole before
head seats in sleeve.
(q) Carefully drill four holes into saddle using pre-drilled holes in sleeve as guides.
(r) Install special pins and carefully peen heads to insure tight fit of sleeve.
(s) Remove special sleeve retaining bolts.
(t) Wipe area clean.
(u) Install new bearing cap and torque to specifications in table 3-3.
(v) Rebore sleeve and cap to standard size (para 3-9g(2), g(3), and g(4)).
(w) If sleeve protrudes on sides of saddle, remove excess with thrust surface cutter.
h. Main bearing (no. 7) thrust surface repair.
(1) Install thrust surface cutter.
NOTE
Tool no. 3375053 thrust surface cutter is used with ST-1117 main bearing bore tool
to restore thrust surface of block and no. 7 main bearing cap. Grooves, uneven
wear, and galled surfaces are machined away to provide smooth surface.
(a) Install centering rings in center of no. 1 and no. 7 bearing saddles. Ensure ring is centered in thrust
saddle to clear tool holder when cutting thrust bearing surface. Use softhead hammer to tap rings
into place.
(b) Install main bearing caps over centering rings and torque capscrews to specifications in table 3-3.
(c) Slide boring bar through centering rings.
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