SR4 Generator with VR3 or VR4 Voltage Regulator Caterpillar

Removal Procedure

Illustration 1	g00855983
Permanent Magnet Pilot Excited Generator (1) Pilot Exciter Armature Stator

Note: On permanent magnet pilot excited generators, pilot exciter armature stator (1) must be removed before the generator is separated from the engine. This prevents damaging the permanent magnet or the shaft due to the small clearance between the pilot exciter stator and the rotor.

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Illustration 2	g00855988
(1) Terminal Strips (2) Engine Harness

1. Disconnect the engine harness wires from terminal strips (1) and the control panel. Remove engine harness (2) from the generator enclosure.

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Illustration 3	g00855990
(3) Ground Straps

2. Disconnect ground straps (3) from the generator.

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Illustration 4	g00855991
(4) Drip Cover (5) Enclosure (6) Screen (7) Bolts (8) Cover

3. Remove drip cover (4) and screen (6) from the generator.

4. Remove bolts (7) and remove enclosure (5) from the generator. Remove cover (8) from the generator.

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Illustration 5	g00855997
(9) Bolts

5. Remove bolts (9) which fasten the generator coupling plates and the fan to the engine flywheel.

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Illustration 6	g00855999

6. Support the engine for the removal of the generator.

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Illustration 7	g00856000
(10) Bolts (11) Bolts

7. Attach a hoist to the generator. The point of attachment and the weight vary with the size of the generator. A strap must be used on smaller generators when a shackle is not provided.

8. Remove bolts (10) which fasten the generator to the base.

9. Remove bolts (11) which fasten the generator housing to the flywheel housing.

10. Separate the generator from the engine. Remove the generator.

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Illustration 8	g00856001
(12) Coupling Plates (13) Bolts

11. Remove bolts (13) that fasten coupling plates (12) to the rotor. Remove coupling plates (12).

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Illustration 9	g00856002
(14) Fan (15) Shims

12. Remove shims (15) from the rotor shaft. Remove fan (14) from the generator housing.

    Note: When removing shims (15), note the number of shims and note the location of the shims if the generator is to be reinstalled.