3512B Petroleum Engines Caterpillar

Face Runout (axial eccentricity) of the Flywheel Housing

Illustration 1	g00285931
8T-5096 Dial Indicator Group

If you use any other method except the method that is given here, always remember that the bearing clearance must be removed in order to receive the correct measurements.

1. Fasten a dial indicator to the flywheel so the anvil of the dial indicator will contact the face of the flywheel housing.

2. Put a force on the crankshaft toward the rear before the dial indicator is read at each point.
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   Illustration 2	g00285932
   Checking Face Runout Of The Flywheel Housing

3. Turn the flywheel while the dial indicator is set at 0.0 mm (.00 inch) at location (A). Read the dial indicator at locations (B), (C) and (D).

4. 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 (.015 inch), which is the maximum permissible face runout (axial eccentricity) of the flywheel housing.

Bore Runout (radial eccentricity) of the Flywheel Housing

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Illustration 3	g00285934
8T-5096 Dial Indicator

1. Fasten a dial indicator to the flywheel so the anvil of the dial indicator will contact the bore of the flywheel housing.
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   Illustration 4	g00285936

2. 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.

3. Divide the measurement from Step 2 by two. Write this number on line 1 in columns (B) and (D).

4. Turn the flywheel in order to put the dial indicator at position (A). Adjust the dial indicator to 0.0 mm (0.00 inch).
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   Illustration 5	g00285932
   Checking Bore Runout Of The Flywheel Housing

5. Turn the flywheel counterclockwise in order to put the dial indicator at position (B). Write the measurements in the chart.

6. Turn the flywheel counterclockwise in order to put the dial indicator at position (C). Write the measurement in the chart.

7. Turn the flywheel counterclockwise in order to put the dial indicator at position (D). Write the measurement in the chart.

8. Add the lines together in each column.

9. 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.
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   Illustration 6	g00286046
   Graph For Total Eccentricity (1) Total vertical eccentricity. (2) Total horizontal eccentricity. (3) Acceptable value. (4) Unacceptable value.

10. On the graph for total eccentricity, find the point of intersection of the lines for vertical eccentricity and horizontal eccentricity.

11. 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

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Illustration 7	g00286049
Checking Face Runout Of The Flywheel

1. 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.

2. Set the dial indicator to read 0.0 mm (0.00 inch).

3. Turn the flywheel at intervals of 90 degrees and read the dial indicator.

4. Take the measurements at all four points. Find the difference between the lower measurements and the higher measurements. This value must not exceed the maximum permissible face runout (axial eccentricity) of the flywheel.

Bore Runout (radial eccentricity) of the Flywheel

Illustration 8	g00286054
Checking Bore Runout Of The Flywheel (1) 7H-1945 Holding Rod. (2) 7H-1645 Holding Rod. (3) 7H-1942 Dial Indicator. (4) 7H-1940 Universal Attachment.

1. Install the 7H-1942 Dial Indicator (3). Make an adjustment of the 7H-1940 Universal Attachment (4) so that the dial indicator makes contact on the flywheel.

2. Set the dial indicator to read 0.0 mm (0.00 inch).

3. Turn the flywheel at intervals of 90 degrees and read the dial indicator.

4. Take the measurements at all four points. Find the difference between the lower measurements and the higher measurements. This value must not exceed the maximum permissible bore runout (radial eccentricity) of the flywheel.
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   Illustration 9	g00286058
   Flywheel Clutch Pilot Bearing Bore

5. Take the measurements at all four points. Find the difference between the lower measurements and the higher measurements. This value must not exceed the maximum permissible pilot bore runout of the flywheel.