Fig. P.4. Checking Alignment of Flywheel Housing Face

Fig. P.2. Checking Flywheel Back Face run-out. - TM-55-1930-209-14P-9-4_745

TM-55-1930-209-14P-9-4 Water Purification Barges (NSN 1930-01-234-2165) Electric Power System Manual
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GEARBOX, FLYWHEEL AND FLYWHEEL HOUSING - P.3 Fig. P.3. Checking Alignment of Flywheel Housing Bore. To Remove the Flywheel Housing 1. Remove the flywheel (see Page P.2). 2. Remove the starter motor. 3. Unscrew the nuts securing the flywheel housing to the cylinder block and tap the housing clear of the locating dowels. 4. Examine the housing for cracks or damage etc. To Refit the Flywheel Housing 1. Ensure that the rear face of the cylinder block and the mating face of the flywheel housing are perfectly clean and free from burrs, etc. Check dowel location in block and housing, ream and fit oversize dowels where necessary. 2. Locate the flywheel housing carefully on the two dowels and refit the securing setscrews. 3. Mount a dial test indicator (clock) gauge with the base on the crankshaft flange and the gauge stylus on and perpendicular with the inner face of the housing aperture as shown in Fig. P.3. Rotate the crankshaft, the inner bore should be truly central with the crankshaft within the limits listed towards the end of this section. 4. With the gauge base still mounted in the same position adjust the stylus so that it is at right angles to tile vertically machined rear face of the flywheel housing as shown in Fig. P.4. Turn the crankshaft and check that this face is at right angles to the crankshaft axis to within the following limits. Diameter of Max. Housing Bore Allowance Up to 14 1/4 in 0.006 in (0.15 mm) (362 mm) Total Indicator Reading 14 1/4 to 20 1/8 in 0.008 in (0.20 mm) (362 to 511 mm) Total Indicator Reading 20 1/8 to 25 1/2 in 0.010 in (0.25 mm) (511 to 648 mm) Total Indicator Reading 25 1/2 to 31 in 0.012 in (0.30 mm) (648 to 787 mm) Total Indicator Reading NOTE: Any adjustments which may be necessary to bring the flywheel housing within the limits quoted must be carried out on the housing, under no circumstances may the rear face of the cylinder block be interfered with. 5. When the housing is correctly aligned finally tighten the securing setscrews. 6. Refit the flywheel as previously described on Page P.2. Fig. P.4. Checking Alignment of Flywheel Housing Face.

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