SEAL 3743608 - Caterpillar

Removal Procedure
Remove The Exciter Field and Remove The Exciter Armature
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Side And Rear Access Panels
Remove the side and rear access panels from the generator.
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Voltage Regulator (1) Wires F1 and F2
Disconnect wires F1 and F2 (1) from the first termination point. These wires terminate at the voltage regulator or at a terminal strip. For permanent magnet pilot excited generators, disconnect wires 26, 28, and 30 from the first termination point. These wires first terminate at fuses. These fuses are located on a terminal strip or these fuses are located in the harness.Pull the disconnected wires from the harness bundles and place the disconnected wires near the exciter field.
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Two-Diode Rectifier Blocks (Three Pieces)
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Three-Diode Rectifier Block
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(2) Wires (3) Allen head screws (4) Rectifier Block (5) Mounting Assembly
Various rectifier blocks and mounting hardware are used. The rectifier blocks and the mounting plate must be removed in order to remove the exciter. Disconnect the two generator main field leads from the rectifier blocks. Also, disconnect the three exciter leads from the rectifier blocks.For generators with the six-diode rectifier block (4), remove two allen head screws (3) which fasten the six-diode rectifier block and mounting assembly (5) to the rotor shaft. Remove the six-diode rectifier block and mounting assembly (5) .
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Generator With Outboard PM Pilot Exciter (6) Bolts (7) Mounting Assembly (8) Retainer
On generators with an outboard PM pilot exciter, perform the following procedure:
Remove four bolts (6) which fasten retainer (8) and mounting assembly (7) to the rotor shaft.
Remove retainer (8) and mounting assembly (7). Ensure that the diode rectifier blocks remain attached.
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Generator With Outboard PM Pilot Exciter (9) Bolts (10) Rotating Pilot Exciter Field (11) Stationary Pilot Exciter Armature
On generators with an outboard PM pilot exciter, perform the following procedure: Note: The magnetism between pilot exciter armature (11) and pilot exciter field (10) is very strong. The components may come off at the same time.
Remove four bolts (9) which fasten stationary pilot exciter armature (11) to the generator.
Remove stationary pilot exciter armature (11) and rotating pilot exciter field (10) .
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Shroud and Exciter Field (12) Shroud (13) Exciter Field (14) Bolts
If equipped, remove four bolts (14) which fasten shroud (12) and exciter field (13) to the generator. Remove shroud (12) (if equipped) and exciter field (13) from the generator.
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Retainer and Exciter Armature (15) Exciter Armature (16) Retainer (17) Bolts
Four bolts (17) and a retainer (16) are used to fasten exciter armature (15) to the rotor shaft. Remove the four bolts and remove the retainer. While the retainer is being removed, carefully pass the generator leads through the retainer's opening. Remove exciter armature (15) from the rotor shaft. Note: If the exciter armature cannot be pulled from the rotor shaft by hand, then a pulling tool must be used. Use a pulling tool that will not damage the armature windings.