3306C Truck Engine 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. Lightly force 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.

Face Runout (Axial Eccentricity) of the Flywheel

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Illustration 3	g00286049
Checking Face Runout Of The Flywheel

1. Refer to Illustration 3 and install the dial indicator. Always apply 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 (.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 4	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) until the dial indicator contacts the flywheel.

2. Set the dial indicator to read 0.0 mm (.00 inch).

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

4. Record 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 5	g00286058
Flywheel Clutch Pilot Bearing Bore

5. Record 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.