C18 Generator Set Caterpillar

Removal Procedure

Start By:

1. Remove the exciter field and remove the exciter armature. Refer to Disassembly and Assembly, "Exciter - Remove and Install" and Disassembly and Assembly, "Rotor - Remove and Install".

Illustration 1	g00615777
(1) Protective strip

1. Put protective strips (1) 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 removal of the end housing, these pieces protect the rotor and these pieces protect the stator from damage.

2. The generator bearing is retained in the generator end housing. On the inside of the generator end housing, a bearing cap or retaining bars are used to retain the bearing.

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Illustration 2	g00615790
Retaining Bar (2) Retaining bar

3. If the generator end housing is equipped with retaining bars (2), remove the four bolts that fasten the retaining bars to the generator end housing. Remove the retaining bars.

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Illustration 3	g00615797
Bearing Cap (3) Bearing Cap

4. If the generator end housing is equipped with bearing cap (3), remove the necessary bolts which 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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Illustration 4	g00615803
(4) End housing (5) Bolts

Note: The weight of end housing (4) varies with the size of the generator. Larger end housings require the use of a hoist.

5. Attach a hoist to end housing (4). Remove bolts (5) that fasten end housing (4) to the generator. Use a pry bar to separate the end housing from the generator. Some end housings have provisions which allow the use of forcing screws. Lift the end housing from the generator and remove the end housing from the generator.

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Illustration 5	g00615809
(6) Tooling

6. Attach tooling (6). Remove the bearing.

Installation Procedure

To install the bearing that is located at the exciter end of the generator, use the following procedure.

1. Heat the bearing to 107 °C (224.6 °F).

2. While the bearing is heated to 107 °C (224.6°F), place the bearing inside the end housing.

3. If the generator end housing is equipped with a bearing cap, attach bearing cap to the end housing. Install bolts.

4. If equipped, attach bearing lube line to the bearing cap.

5. If the generator end housing is equipped with retaining bars, attach the retaining bars to the end housing. Install bolts.