(ALIGNMENT OF SINGLE-BEARING GENERATORS TYPICAL)

TM-55-1930-209-14P-9-4 Water Purification Barges (NSN 1930-01-234-2165) Electric Power System Manual
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SR 4 GENERATOR DISASSEMBLY AND ASSEMBLY (ALIGNMENT OF SINGLE-BEARING GENERATORS TYPICAL) NOTE: For information or alignment of two bearing generators makes reference to Form No. SEHS7073. Typical installation and alignment procedure for electric sets with single-bearing generators. Do not start the alignment procedure until the electric set is permanently installed. If the electric set is moved to a different location, check the alignment and make any corrections necessary. The alignment between the generator and the engine must be correct to get maximum performance and long life from the electric set. INSTALLATION OF THE GENERATOR REAR OF ENGINE A. Pilot bore. B. Surface. 1. Remove all dirt, burrs and paint from the contact surfaces of the generator supports and the base. FRONT OF ENGINE 1. Indicator group. 2. Crankshaft pulley. Remove the protection material (compound) from the flywheel pilot bore (A) and from the surface (B ) that makes contact with the coupling. All contact surfaces of the engine, coupling and generator must be completely clean. 2. Remove the timing pointer cover from the flywheel housing. Install indicator group (1 ) as shown on the front of the engine with the tip of the indicator on the face of crankshaft pulley ( 2). Use a bar between the flywheel and flywheel housing to push the crankshaft toward the flywheel to remove all end play. Put the dial indicator in the "zero" position. Move the crankshaft to its most forward position, and make a record of the Total Indicator Reading (TIR). The TIR is the end play of the crankshaft. FRONT OF GENERATOR 3. Plate assembly. 4. Shim pack. 3. Put plate assembly (3) in position in the bore of the flywheel to check for clearance. There must be clearance between the outside diameter of the plate assembly (3) and the inside diameter of the bore in the flywheel. NOTICE Damage to the engine and/or generator can be the result if the electric set is run with a plate assembly that does not have this clearance. 4. Install a full shim pack (4) and plate assembly (3) on the generator with bolts (5). On D379, G379, 139

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