TM 5-3825-226-24 CRANKSHAFT MAIN BEARINGS REMOVE AND INSTALL CRANKSHAFT MAIN BEARINGS Tools Needed A B C D 2P5518 Bearing Tool 1 5B1161 Wire * 8S5131 Adapter 1 8S2328 Dial Test Indicator Group 1 start by: a) remove oil pan 1. Check each main bearing cap for its location on the   engine.      Each   cap   has   a   number   which gives the location of that cap.  Make a note that the  number  on  each  cap  is  toward  the  front  of the cylinder block. 2. Remove  the  bolts  and  washers  that  hold  main bearing  cap  (2)  in  place.    Remove  the  bearing cap and the lower half of the main bearing. 3. Remove bearing (1) from the bearing cap. NOTE When the No.  1 main bearing cap is removed  or  installed  use  tool  (C)  to remove and install the bolts that hold it. 4. Turn    the    crankshaft    until    tool    (A)    can    be installed in the oil hole in the crankshaft journal. Install   tool   (A).      Turn   the   crankshaft   in   the direction which will push the upper main bearing out, tab end first. CAUTION If   the   crankshaft   is   turned   in   the wrong    direction,    the    tab    of    the bearing  will  be  pushed  between  the crankshaft   and   the   cylinder   block. This     will     cause     damage     to     the crankshaft and block. 5. Put   clean   engine   oil   on   the   lower   bearings. Install lower bearings in the bearing caps. 6. Put clean engine oil on the upper bearings (the bearing with the oil hole).  Install upper bearings in the cylinder block with tool (A). NOTE: Be sure the tab on the back of the bearings fits in the groove of the caps and cylinder block. CAUTION When    bearing    caps    are    installed, make sure the number on the side of the cap is next to and respective with the number on the engine block. NOTE When the bearing clearance is checked  the  crankshaft  will  have  to be lifted up against the upper halves of the main bearings and held to get a  measurement  with  wire  (B).    The wire  will  not  hold  the  weight  of  the crankshaft. 3-113