Alignment

Checking The Face Of Engine Flywheel Housing.
(1) Engine. (2) Dial indicator. (3) Crankshaft. (4) Flywheel. (5) Flywheel housing.

1. Bolt a thousandths increment dial indicator or gauge to the engine flywheel so that the indicator is perpendicular to the face of the engine flywheel housing, and the indicator stem is riding on the face of the flange.

2. Rotate the engine flywheel, always keeping a thrust in the same direction, and note the face deviation of the engine flywheel housing flange. The face deviation must not exceed the figures given in the above chart.

Checking The Bore Of Engine Flywheel Housing.
(1) Engine. (2) Dial indicator. (3) Crankshaft. (4) Flywheel. (5) Flywheel housing.

3. With the indicator mounted, position the indicator stem so that it will ride on the bore of the engine flywheel housing.

4. Rotate the engine flywheel and note the bore eccentricity of the engine flywheel housing bore. See Chart.

Checking The Driving Ring Surface Of Engine Flywheel.
(1) Engine. (2) Dial indicator. (3) Crankshaft. (4) Flywheel. (5) Flywheel housing.

5. Bolt a thousandths dial indicator or gauge to the engine flywheel housing so that the indicator is perpendicular to the engine flywheel, and the indicator stem is riding on the face of the flywheel.

Rotate the flywheel. The variation of the face runout of the surface to which the driving gear is bolted should not exceed 0.012 mm (.0005 in) per inch of diameter.

Checking The Driving Ring Pilot Bore of Engine Flywheel
(1) Engine. (2) Dial indicator. (3) Crankshaft. (4) Flywheel. (5) Flywheel housing.

6. With the indicator mounted, position the indicator stem so that it will ride on the driving ring pilot bore of the engine flywheel. Rotate the flywheel. The driving ring pilot bore eccentricity of the engine flywheel should not exceed 0.13 mm (.005 in) maximum total indicator reading. Thrust on the flywheel should be in one direction at all times to obtain a correct reading.

Checking Pilot Bearing Bore Of Engine Flywheel.
(1) Engine. (2) Dial indicator. (3) Crankshaft. (4) Flywheel. (5) Flywheel housing.

7. Position the indicator so that the stem will ride on the pilot bearing bore of the flywheel. Rotate the flywheel. The eccentricity of the pilot bearing bore should not exceed 0.13 mm (.005 in) maximum total indicator reading. Eccentricity between the driving ring pilot bore (C36987P1) and pilot bearing bore (C36988P1) should not exceed 0.20 mm (.008 in) inch total indicator reading.

Alignment Of Engine And Marine Transmission
(1) Engine. (2) Indicator. (5) Flywheel housing. (6) Marine gear. (7) Support bracket. (8) Bedrail. (9) Shim here.

8. With the indicator stem on the inside diameter of the driving ring pilot, apply pressure with a prybar between the flywheel and flywheel housing on the opposite side from the indicator. The indicator will measure vertical movement of engine flywheel. Maximum allowable movement is 0.13 mm (.005 in).