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 TM 9-2815-226-34-1
(3) Install oversize guides as follows:
NOTE
Tips of ST-1188 and ST-1187 reamers act as pilots.
(a) Lubricate ST-1187 reamer (0.010 in. [0.25 mm] oversize) with cutting oil.
(b) Using drill press with floating tool holder, ream out bore in head. Remove all burrs. Corner breaks
should not exceed 0.015 in. (0.38 mm).
(c) Using ST-1217 driver, press oversize valve guide in head.
(d) If damaged valve bore does not clean up, use ST-1187 reamer (0.015 in. [0.381 mm] oversize).
(e) Repeat steps (a), (b), and (c) above.
(4) Insert valve stem into guide and check for freedom of movement.
CAUTION
HANDLE REAMER WITH CARE TO PREVENT DAMAGE TO CARBOLOY CUTTING
EDGES.
(5) If movement is not smooth or some tightness is encountered, ream guide with tool no. 3376200 reamer.
Use cutting oil for proper finish. Measure bore of guide after reaming. Bore diameter should not exceed
0.4532 in. (11.5112 mm).
3-184
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