SPACER 7D2955 - Caterpillar

Removal Procedure
Start By:
Remove the generator. Refer to Disassembly and Assembly, "Generator - Remove".
Remove the exciter field and remove the exciter armature. Refer to Disassembly and Assembly, "Exciter - Remove and Install".
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(1) Bolts (2) Coupling Plate
Remove bolts (1) which fasten coupling plate (2) to the rotor. Remove the coupling plate. The coupling plate assembly can be a single solid plate or the coupling plate assembly can be numerous flexible plates.
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(3) Shims (4) Fan
Remove shims (3) from the rotor shaft. Remove fan (4) from the generator housing.
Attach straps or chains to the drive end of the generator housing. With a hoist, raise the generator until the generator is in a vertical position. Ensure that the drive end is oriented upward.
Align support blocks with the generator housing's outside diameter. Lower the generator onto the blocks.
The generator bearing is located on the exciter end of the rotor shaft. The bearing is retained in the generator end housing by a bearing cap or the bearing is retained in the generator end housing by retainer bars.When the generator end housing is equipped with retaining bars, remove the four bolts that fasten the retaining bars to the generator end housing. Remove the retaining bars.When the generator end housing is equipped with a bearing cap, remove the necessary bolts that fasten the bearing cap to the generator end housing. Pry the bearing cap out of the generator end housing. The bearing cap remains with the rotor shaft. If a bearing lube line is attached to the bearing cap, remove the lube line.
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(5) Bolts
On 3406E generator sets, the drive end housing must be removed. Attach a hoist to the drive end housing. Remove the bolts (5) that attach the drive end housing to the generator. Remove the drive end housing.
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(6) Bolts (7) Drive End Housing
For two-bearing generators, bolts (6) which fasten drive end housing (7) to the generator must be removed. The drive end housing remains with the rotor shaft. Remove the bolts. For two-bearing generators, put a mark on drive end housing (7) and the generator housing. This will ensure proper alignment during installation.
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(8) Protective Strip (9) Drive Coupling
During removal of the generator, the rotor assembly must not contact the stator assembly. If the rotor assembly contacts the stator assembly, the windings can be damaged.
Put protective strips (8) of cardboard, plastic or curved sheet metal between the rotor assembly and the stator assembly. The pieces should be as long as the rotor assembly. These pieces protect the rotor and the stator from damage during rotor removal.
Attach a hoist to drive coupling (8). Remove the rotor assembly from the stator assembly.Installation Procedure
Start By:
Place the generator in a vertical position. Ensure that the drive end is oriented upward.
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(8) Protective Strip (9) Drive Coupling
Put protective strips (8) of cardboard, plastic or curved sheet metal between the rotor assembly and the stator assembly. The pieces should be as long as the rotor assembly. During installation of the rotor, these pieces protect the rotor from