3412E Petroleum Engine Caterpillar

Face Runout (Axial Eccentricity) of the Flywheel

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Illustration 1	g00286049
Checking face runout of the flywheel

1. Refer to Illustration 1 and install the dial indicator gp. 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. Refer to Testing and Adjusting, "Finding Top Center Position for No. 1 Piston".

4. Take the measurements at all four points. The difference between the lower measurements and the higher measurements that are performed at all four points must not be more than 0.15 mm (0.006 inch), which is the maximum permissible face runout (axial eccentricity) of the flywheel.

Bore Runout (Radial Eccentricity) of the Flywheel

Illustration 2	g01101752
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) with the 7H-1940 Universal Attachment (4). Make an adjustment of 7H-1940 Universal Attachment (4) so 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. The difference between the lower measurements and the higher measurements that are performed at all four points must not be more than 0.15 mm (0.006 inch), which is the maximum permissible face runout (radial eccentricity) of the flywheel.

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Illustration 3	g00286058
Flywheel clutch pilot bearing bore

5. To find the runout (eccentricity) of the pilot bearing bore, use the preceding procedure.

6. The runout (eccentricity) of the bore for the pilot bearing in the flywheel must not exceed 0.13 mm (0.005 inch).