TM 5-3825-226-24 Bore   Runout   (radial   eccentricity)   of   the   Flywheel Housing 1. With  the  dial  indicator  in  position  at  (C),  adjust the dial indicator to .000 in.  Push the crankshaft up     against     the     top     bearing.          Write     the measurement for bearing clearance on line 1 in column (C). 2. Divide   the   measurement   from   Step   1   by   2. Write this number on line I in columns (B) & (D). CHECKING   BORE   RUNOUT   OF   THE   FLYWHEEL HOUSING 3. Turn  the  crankshaft  to  put  the  dial  indicator  at (A).  Adjust the dial indicator to .000 in. 4. Turn the crankshaft counterclockwise to put the dial indicator at (B). Write down the measurement in the chart. 8S2328 DIAL INDICATOR GROUP INSTALLED NOTE:  Write the dial indicator measurements with their positive  (+)  and  negative  (-)  notation  (signs).    This  is necessary   for   making   the   calculations   in   the   chart correctly. 5. Turn the crankshaft counterclockwise to put the dial indicator at (C).  Write the measurement in the chart. 6. Turn the crankshaft counterclockwise to put the dial indicator at (D).  Write the measurement in the chart. 7. Add lines I & 11 by columns. 8. Subtract   the   smaller   number   from   the   larger number  in  line  III  in  columns  (B)  &  (D).    The result   is   the   horizontal   "eccentricity"   (out   of round).      Line   II,   column   (C)   is   the   vertical eccentricity. CHART FOR DIAL INDICATOR MEASUREMENTS Position of dial indicator Line No. A B C D Correction for bearing clearance I 0 Dial Indicator Reading II 0 Total of Line 1 & 2 III 0 ** * ** * Total Vertical eccentricity (out of round). ** Subtract the smaller No.  from the larger No.  The difference is the total horizontal eccentricity. A10234X1 9. On the graph for total eccentricity find the point of intersection of the lines for vertical eccentricity and horizontal eccentricity. GRAPH FOR TOTAL ECCENTRICITY 10. If the point of intersection is in the range marked "Acceptable"  the  bore  is  in  alignment.    If  the point of intersection is in the range marked "Not Acceptable"    the    flywheel    housing    must    be changed. 2-74