Norfolk Naval Shipyard is soliciting contractor services to perform scraping on the bearing cap of #3 Main Reduction Gear forward journal bearing onboard CVN 77. The Bearing is ~32.25 OD x 19 LG and Cap has < 375 SQ IN of parting half surface area. The bearing pinch needs to be increased from 0.001 clear to 0.000-0.001 interference at TDC (not to exceed 0.003 interference worst case) and a satisfactory blue check following pinch correction. There shall be 75% overall contact inside the bolt pattern and areas of noncontact should be distributed, not concentrated in one area only. Contractors will work IAW Drawing 662E662 – Bearing Cap 2nd Red. Gear FWD and LTR 9241 Ser 05V/004 dtd 5 Jan17 – CVN 68 class Main Reduction Gear Bull Gear Journal Bearings – recommendations. Support shall include up to two (2) Contractors to perform scraping on one (1) 8-hour shift Monday through Friday, and the possibility of Saturday and Sunday, to meet schedule requirements.
