TM 10-3930-659-34 5-4. ENGINE MAIN BEARINGS, THRUST BEARING, AND CRANKSHAFT REPLACEMENT (Con’t). 11. Position lower main bearing (1) on main bearing cap (2). Ensure that tang on lower main bearing fits in locking groove on main bearing cap. CAUTION Main bearing caps and thrust bearing cap    must    be    installed    in    correct numbered location with indicator arrow facing camshaft side of engine block. 12. Position  main  bearing  cap  (2)  on  engine  block (5).  Ensure  that  tangs  on  bearings  fit  in  locking grooves on engine block. 13. Apply   lubricating   oil   (Item   39,   Appendix   B)   to threads of two screws (4). Install two washers (3) and screws on main bearing cap (2) and engine block (5). Torque screws to 85 Ib.-ft. (115 N•m). 14. Using  inside  caliper  micrometer,  measure  and note  inside  diameter  of  lower  and  upper  main bearings  (1  and  13).  Diameter  must  be  3.125- 3.127 in. (7.9387.943 cm). 15. Subtract largest crankshaft main bearing journal measurement taken in step 7 from measurement taken in step 14. Difference between the two measurements is clearance. Maximum clearance allowable is 0.006 in. (0.152 mm). NOTE If one main or thrust bearing is replaced, all main and thrust bearings must be replaced. 16. If clearance is not within specification and mating main bearing journal is within specification, replace crankshaft and bearings. 17. Remove  two  screws  (4),  washers  (3),  and  main  bearing  cap  (2)  from  engine  block  (5).  Remove  lower  main bearing (1) from main bearing cap. 18. Remove upper main bearing (13) from engine block (5). 19. Repeat steps 10 through 18 for remaining main bearings and thrust bearing. 20. If end play measurement taken in step 1 of subparagraph a is not within specification, replace crankshaft. TA708152 5-40