VALVE GP-AIR CONTROL 8N8483 - Caterpillar

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Illustration 13 g00619669
Generator with Inboard PM Pilot Exciter (20) Pilot Exciter Armature (21) Pilot Exciter Field (22) Spacer (23) BoltsNote: The magnetism between pilot exciter armature (20) and pilot exciter field (21) is very strong. The components may come off at the same time.
Slide spacer (22) off the rotor shaft.
Remove four bolts (23) which fasten stationary pilot exciter armature (20) to the generator.
Remove stationary pilot exciter armature (20) and rotating pilot exciter field (21) .Installation Procedure
Install The Exciter Field and Install The Exciter Armature
On generators with an inboard PM pilot exciter, perform the following procedure:
Illustration 14 g00619669
Generator with Inboard PM Pilot Exciter (20) Pilot Exciter Armature (21) Pilot Exciter Field (22) Spacer (23) Bolts
Slide stationary pilot exciter armature (20) and rotating pilot exciter field (21) over the rotor shaft.
Use four bolts (23) in order to fasten the stationary pilot exciter armature (20) to the generator.
Slide spacer (22) on the rotor shaft.
On generators with an outboard PM pilot exciter, perform the following procedure:
Illustration 15 g00619666
Generator with Outboard PM Pilot Exciter (18) Exciter Armature (19) Spacer
Slide exciter armature (18) on the rotor shaft.
As the spacer is slid on the rotor shaft, ensure that the spacer clears the exciter leads.
Carefully slide spacer (19) on the rotor shaft.
On generators with an outboard PM pilot exciter, perform the following procedure:
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Place exciter field (17) on the generator.
Use four bolts (16) to fasten the exciter field to the generator.
Slide exciter armature (13) on the rotor shaft.
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Retainer and Exciter Armature (13) Exciter Armature (14) Retainer (15) Bolts
A retainer (14) is used to fasten the exciter armature (13 ) to the generator. Carefully pass the generator leads through the retainer's opening.
Use four bolts (15) to fasten the retainer to the generator.Note: When the exciter armature (13) is installed, the bolts (15) must be properly tightened.Apply 9S-3263 Thread Lock to the bolts (15) before the bolts are installed. Refer to Table 1 for information regarding bolt torque.
Table 1
BOLT TORQUE    
Bolt Size     Torque    
5/16 inch    
35.4 N m (26.11 lb ft)    
3/8 inch    
55.8 N m (41.16 lb ft)    
Illustration 18 g00619613
Shroud and Exciter Field (10) Shroud (11) Exciter Field (12) Bolts
Use four bolts (12) to attach shroud (10) (if equipped) and exciter field (11) to the generator.
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Generator with Outboard PM Pilot Exciter (7) Bolts (8) Rotating Pilot Exciter Field (9) Stationary Pilot Exciter Armature
On generators with an outboard PM pilot exciter, perform the following procedure:
Place stationary pilot exciter armature (9) and rotating pilot exciter field (8) on the generator.
Use four bolts to attach the stationary pilot exciter armature (9) and rotating pilot exciter field (8) to the generator.
On generators with an outboard PM pilot exciter, perform the following procedure:
Illustration 20 g00619592
Generator with Outboard PM Pilot Exciter (4) Bolts (5) Mounting Assembly (6) Retainer
Slide mounting assembly (5) and retainer (6) over the rotor shaft.
Use four bolts to attach the mounting assembly (5) and retainer (6) to the rotor shaft.
Various rectifier blocks and mounting hardware are used. The rectifier blocks and mounting plates must