PISTON-BALANCE 6Y2979 - Caterpillar

Face Runout (Axial Eccentricity) of the Flywheel
Table 1
Tools Needed Quantity
8T-5096 Dial Indicator Gp 1
Illustration 1 g00812156
Checking face runout of the flywheel
Refer to Illustration 1 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. The difference between the lower measurements and the higher measurements that are performed at all four points must not be more than 0.43 mm (0.017 inch), which is the maximum permissible face runout (axial eccentricity) of the flywheel. Bore Runout (Radial Eccentricity) of the Flywheel
Table 2
Tools Needed Quantity
8T-5096 Dial Indicator Gp 1
Illustration 2 g01086572
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
Install 7H-1942 Dial Indicator (3). Make an adjustment of 7H-1940 Universal Attachment (4) so the dial indicator makes contact on the ID of the flywheel.
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. The difference between the lower measurements and the higher measurements that are performed at all four points must not be more than 0.23 mm (0.009 inch) which is the maximum permissible drive hub pilot bore (radial eccentricity) of the flywheel.
The runout (eccentricity) of the coupling pilot diameter is not required for the flywheel.