CYLINDER BLOCK AS 1W4327 - Caterpillar

Illustration 2 g00285932
Checking face runout of the flywheel housing
Turn the flywheel while the dial indicator is set at 0.0 mm (0.00 inch) at location (A) . Read the dial indicator at locations (B) , (C) and (D) .
The difference between the lower measurements and the higher measurements that are performed at all four points must not be more than 0.38 mm (0.015 inch), which is the maximum permissible face runout (axial eccentricity) of the flywheel housing.Bore Runout (radial eccentricity) of the Flywheel Housing
Illustration 3 g00285934
8T-5096 Dial Indicator
Fasten a dial indicator to the flywheel so the anvil of the dial indicator will contact the bore of the flywheel housing.
Illustration 4 g00285936
While the dial indicator is in the position at location (C) adjust the dial indicator to 0.0 mm (0.00 inch). Push the crankshaft upward against the top of the bearing. Refer to the illustration 4. Write the measurement for bearing clearance on line 1 in column (C) .Note: Write the measurements for the dial indicator with the correct notations. This notation is necessary for making the calculations in the chart correctly.
Divide the measurement from Step 2 by two. Write this number on line 1 in columns (B) and (D) .
Turn the flywheel in order to put the dial indicator at location (A) . Adjust the dial indicator to 0.0 mm (0.00 inch).
Illustration 5 g00285932
Checking bore runout of the flywheel housing
Turn the flywheel counterclockwise in order to put the dial indicator at location (B) . Write the measurements in the chart.
Turn the flywheel counterclockwise in order to put the dial indicator at location (C) . Write the measurement in the chart.
Turn the flywheel counterclockwise in order to put the dial indicator at location (D) . Write the measurement in the chart.
Add the lines together in each column.
Subtract the smaller number from the larger number in column B and column D. Place this number on line III. The result is the horizontal eccentricity (out of round). Line III in column C is the vertical eccentricity.
Illustration 6 g00286046
Graph for total eccentricity (1) Total vertical eccentricity (2) Total horizontal eccentricity (3) Acceptable value (4) Unacceptable value
On the graph, find the intersection of the lines for vertical eccentricity and horizontal eccentricity.
If the point of intersection is in the range that is marked "Acceptable", the bore is in alignment. If the point of intersection is in the range that is marked "Not acceptable", the flywheel housing must be changed.Face Runout (Axial Eccentricity) of the Flywheel
Illustration 7 g00286049
Checking face runout of the flywheel
Refer to illustration 7 and install the dial indicator. Always put a force on the crankshaft in the same direction before the dial indicator is read. This will remove any crankshaft end clearance.
Set the dial indicator to read 0.0 mm (0.00 inch).
Turn the flywheel at intervals of 90 degrees and read the dial indicator.
Take the measurements at all four points. Find the difference between the lower measurements and the higher measurements. This value is the runout. The maximum permissible face runout (axial eccentricity) of the flywheel must not exceed 0.15