TM 10-3930-659-34 5-4. ENGINE MAIN BEARINGS, THRUST BEARING, AND CRANKSHAFT REPLACEMENT (Con’t). NOTE Upper main and thrust bearings are different sizes. Note location to aid during installation. 14. Remove seven upper main and thrust bearings (13). CAUTION DO NOT remove dowel pin unless damaged. Removal may damage parts. 15. Using stud remover and setter, remove dowel pin (12) from crankshaft (9). 16. Using mechanical puller, remove spur gear (11) from crankshaft (9). 17. Remove woodruff key (14) from crankshaft (9). TA708150 5-37