TM  10-3930-643-34 GENERAL  SUPPORT  ENGINE,  FUEL,  EXHAUST  AND 13-4. Crankshaft. (Sheet 2 of 9) REMOVAL NOTE   Bearing caps are not inter- changeable  within  the  crankcase or with other crankcases.   If a bearing has spun, the entire engine must be disassembled  and  cleaned.   Immediately tag all bearing caps upon removal to aid in installation. 1. Using a 13/16” socket and socket wrench  handle, remove 12 bolts (1), link (2) and six bearing caps (3) from bottom of engine crankcase. COOLING  MAINTENANCE.  (cont) 2. Using  a  5/8”  socket  and  socket  wrench handle, remove 12 bolts (4) and six connecting  bearing  caps  (5),  refer  to paragraph 13-8. 3. Using a 13/16” socket and socket wrench  handle,  remove  two  bolts (6) and thrust bearing cap (7). Go to sheet 3 13-26