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 TM 55-1905-223-24-3
NOTE
The angular position of the permanent magnet exciter is set during the final
electrical test prior to dispatch, and a mark indicating the correct position is made
on the stator housing and the non-drive end bracket at approximately the 12
o'clock position. It is essential that the stator is returned to exactly the same
position when refitting this unit; therefore, before dismantling, this mark must be as
clear as possible.
(1) Mark the position of the stator mount and remove the three stator hex head capscrews to remove
stator cover (Figure 4-1a).
(2) Disconnect the plug inside the permanent magnet exciter access cover. This plug connects the
stator to the leads going into the generator rear end bracket (Figure 4-1b).
(3) Remove the four capscrews and clamps retaining the stator mount to the end bracket (Figure 4-1c).
CAUTION
The magnetic rotor will attract the stator core. Care must be taken to avoid a
contact which may damage the windings when removing the stator housing.
(4) Pull the permanent magnet exciter stator housing out of the recess in the end bracket. It may be
necessary to tap the housing to loosen it. Some pulling force may also be required (Figure 4-1d).
(5) Remove the machine bolt and lockwasher from the main rotor shaft and firmly pull the complete
rotor assembly from the shaft (Figure 4-1e and 1f).
(6) Wrap the magnetic rotor in a protective cover to keep it clean and prevent metallic particles from
collecting on the magnets.
CAUTION
The magnetic properties will be destroyed if the rotor assembly is disassembled.
b. Remove the main rotor assembly.
NOTE
The main rotor assembly is removed from the drive end of the generator.
A
minimum free area, the length of the generator is required to remove the rotor.
(1) Tag and disconnect exciter leads X and XX as well as P2, P3 and P4 from the terminal block.
Bring the leads back into the non-drive end bracket.
4-4
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