CAP 3880807 - Caterpillar

Generator Alignment
Note: For the alignment procedure for two-bearing close coupled generators, see Special Instruction, REHS0177, "Alignment Of Closed Coupled Two Bearing Generators". Note: For the alignment procedure for two-bearing generators, see Special Instructions, SEHS7073, "Alignment of Two Bearing Generators".Note: A specific alignment procedure is not required for generators that are soft mounted.Align Generator Sets With No Supports At The Flywheel Housing
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A Generator set with no supports at the flywheel housing (1) Engine support (2) Base (3) Generator support
If the base (2) of the electric set is fastened to a foundation, loosen all the bolts that connect the base to the foundation. Loosen all bolts that fasten the generator supports (3) and engine supports (1) to the base (2) .
Ensure that there is clearance between the bolts and the bolt holes in the base, the engine supports and the generator supports at all locations.
Check the clearance between the base and the foundation at all mounting locations. Shims should be used in order to prevent the deflection of the base as the bolts that connect the base to the foundation are tightened. When there is no deflection of the base, tighten all bolts that connect the base to the foundation to the final torque.
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(1) Base (2) Generator support (3) Shims
Check the clearance between the base (1) and the engine. Check the clearance between the base (1) and the engine supports. Check the clearance between the base and the generator supports (2) . Check the clearance over the entire length of the supports. This is especially important on generators with long supports (2) , since some of the surfaces may not be square or parallel. Shims should be used in order to prevent the deflection of the supports as the bolts are tightened. After all the necessary shims have been installed, finish tightening all mounting bolts to the final torque. Align Generator Sets With Supports At The Flywheel Housing
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Generator Set With Supports At The Flywheel Housing (1) Base
If base (1) of the electric set is fastened to a foundation, loosen all bolts that connect the base to the foundation. Loosen all bolts that fasten the engine supports and generator supports to the base.
Ensure that there is enough clearance between the bolts and the bolt holes in the base, engine supports, and generator supports at all locations.
Check the clearance between the base and the foundation at all mounting locations. Shims should be used in order to prevent the deflection of the base as the bolts that connect the base to the foundation are tightened. When there is no deflection in the base, tighten all bolts that connect the base to the foundation to the final torque.
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(2) Bolts
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(3) Support (4) Bolt (5) Shims
While the generator is supported by a crane, loosen all bolts (2) that fasten the generator to the flywheel housing. Tighten alternate bolts to the final torque.
Check the clearance between the base and the engine and generator supports at all four