TM    5-3805-258-24-1 B A S I C     B L O C K T E S T I N G     A N D     A D J U S T I NG I CHART  FOR   DIAL  INDICATOR   MEASUREMENTS Position of dial  indicator Line No. A B c D Correction for bearing   clearance I o Dial   Indicator  Reading II o Total  of  Line  1  &  2 Ill o “+ “ ““ “Total   Vertical   eccentricity    (out   of  mu   nd). .*  “~t,ect  the   Sma   IIer  No  from   the  larger  No.  The  difference    ls the  t@al   horizontal    eccentricity. 3. 4. 5. 6. 7. 8. 9. Turn  the  crankshaft  to  put  the  dial  indicator  at (A). Adjust the dial indicator to “0” (zero). Turn the crankshaft counterclockwise to put the dial indicator at (B). Write the measurement in the  chart. Turn the crankshaft counterclockwise to put the dial indicator at (C). Write the measurement in the chart. Turn the crankshaft counterclockwise to put the dial indicator at (D). Write the measurement in the  chart. Add lines I & II by columns. 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  III,  column  (C)  is  the  vertical eccentricity. On the graph for total eccentricity find the point of intersection of the lines for vertical eccentri- city  and  horizontal  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. Face Runout (axial eccentricity) of the Flywheel 1. 2. 3. 4. Install the dial indicator as shown. Put a force on the crankshaft the same way before the indicator is read to be sure the crankshaft end clearance (movement) is always removed. Set the dial indicator to read 0.0 mm (.000 in.). Turn the flywheel and read the indicator every 90°. The difference between the lower and higher measurements taken at all four points must not be more than 0.15 mm (.006 in.), which is the maximum permissible face runout (axial eccen- tricity) of the flywheel. C H E C K I N G     F A C E     R U N O U T     O F     T H E     F L Y W H E E L Bore Runout (radial eccentricity) of the Flywheel 1. Install the dial indicator (3) and make an adjust- ment of the universal attachment (4) so it makes contact as shown. 2. Set the dial indicator to read 0.0 mm (.000 in.). 3.  Turn  the  flywheel  and  read  the  indicator  every 90°. 4-38