PLATE 1348950 - Caterpillar

Removal Procedure
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(1) Stationary pilot exciter armature (2) Rotating pilot exciter fieldNote: This procedure describes removing the generator terminal box from the generator. Some service operations do not require the removal of the generator terminal box. The removal of the generator terminal box may not be necessary.
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Generator Terminal Box with a Typical 600 Frame
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Generator Terminal Box with a Typical 400 Frame
Remove the side and rear panels of the generator terminal box in order to access the wiring.
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Terminal Strips (DIN)
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Terminal Strips
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Terminal Strips (Control Panel interior)
To remove the generator terminal box, disconnect all the wiring that extends from the generator terminal box to the generator or to the engine. Disconnect the following wires:
engine harness wires
generator leads
current transformer wires
temperature sensing wires
space heater wires
ground wiresRemove the engine harness from the generator terminal box.Most of the wiring can be disconnected at the terminal strips. The exact location of the terminal strips and the type of terminal strips varies with the different generator set packages. The preceding illustrations show some of the various terminal strips.
To remove the generator terminal box, remove the lower rear panel and the screen beneath the rear of the generator.
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Generator Terminal Box (Typical 600 Frame)
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Generator Terminal Box (Typical 400 Frame)
Attach a hoist to the four corners of the generator terminal box.
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Top View (3) Bolt
Remove bolts (3) which fasten the generator terminal box to the mounting brackets. Use the hoist to lift the generator terminal box and remove the generator terminal box.
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Generator support (4) Support Beam
If there are no supports between the base of the generator set and the flywheel end of the engine, perform this Step. For supporting the engine during removal of the generator, use one of the following devices:
hoist
jack
support beam (4)
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Generator ground strap (5) Ground strap (6) Bolt
Remove bolt (6) that attaches ground strap (5) to the generator.
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(7) Screen (8) Shield (9) Bolts
Attach a hoist to the generator. The point of attachment varies with the size of the generator. A strap must be used on smaller generators when no shackle is provided.
Remove bolts (9) which fasten the generator to the base.
Remove shield (8) and screen (7) .
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(10) Bolts (11) Bolts
Remove bolts (11) which fasten the fan and the coupling plate to the engine flywheel.
Remove bolts (10) which fasten the generator housing to the flywheel housing.
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(12) Bolts (13) Coupling Plate
Separate the generator from the engine. Remove the generator. Place the generator on solid blocking material which will not allow the generator to roll.
Remove bolts (12) which fasten coupling plate (13) to the rotor. Remove coupling plate (13) .
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(14) Shims (15) Fan
Remove shims (14) from the rotor shaft. If the fan (15) is not attached to the rotor, remove the fan from the generator housing.