DISMANTLING THE MACHINE
Metric Threads are used throughout.
NOTE:
On SINGLE BEARING MACHINES before removal from the prime mover, if possible, position the rotor
such that a full pole face is at the bottom of the main stator core.
Removal of the A.V.R. (SC1 - 3)
1.
Remove the 4 screws retaining A.V.R. lid.
2.
Disconnect all cables to A.V.R.
3.
Remove 4 pillars retaining A.V.R.
Removal of A.V.R. (PC1)
1.
Remove terminal box lid.
2.
Disconnect all cables to A.V.R.
3.
Remove 4 screws retaining A.V.R.
Removal of Main Rotor Assembly
1.
Remove all access covers and terminal box lid.
2.
Disconnect exciter leads X + & XX - at the inline spade connectors inside the terminal box.
3.
Two Bearing Machines only:- remove screws securing the D.E. endbracket.
3a.
Two Bearing Machines only:- position rotor with a full pole face at the bottom and tap endbracket out of its
spigot.
3b.
Lower rotor on to stator core.
3c.
Withdraw D.E. endbracket from bearing.
4.
Single Bearing Machines only:- remove screws securing adaptor and tap adaptor out of its spigot.
5.
Internal Exciter Machines:- remove N.D.E. bearing cap securing screws and bearing cover.
5a.
Remove N.D.E. endbracket securing screws, using 2 of these screws, push endbracket out of its spigot by
using the 2 threaded holes in the endbracket flange.
5b.
Withdraw N.D.E. endbracket complete with exciter stator.
6.
External Exciter Machines'- with external cover removed disconnect main rotor leads from rectifier
6a.
Remove socket head capscrew securing exciter rotor stub shaft.
6b.
Withdraw exciter rotor/rectifier/stub shaft assembly
6c.
Remove N.D.E. bearing cap securing screws.
6d.
Remove N.D.E. endbracket securing screws, using 2 of these screws, push endbracket out of its spigot
through the 2 threaded holes in the endbracket.
6e.
Withdraw N.D.E. endbracket complete with exciter stator.
7.
Slide rotor out of stator bore towards the D.E. and withdraw rotor.
NOTE:
For removal of rotor of the SC2/3 alternator it maybe necessary to use rope slings as follows.
1.
To withdraw the rotor from the stator, it must be lifted by means of rope slings at both ends, and inched out
towards the drive end, until half of the main rotor core is protruding out of the stator. At this point it Is safe to
release the weight from the rope slings.
2.
Tightly bind a rope sling around this portion of the rotor core, and take the weight on this sling.
3.
With both ends of the rotor held, manually slide the rotor out of the stator bore. Care should be taken during
this operation to prevent damage to the windings and rectifier assembly by manually guiding the non-drive
end of the rotor assembly as it is withdrawn.
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