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Warning! The rope sling may not be at the center of gravity of the rotor and guidance at the
ends of the rotor is essential. THE FULL WELGHT OF THE ROTOR GIVEN IN
THE TABLE BELOW MUST BE SUPPORTED BY THE CRANE AND SLING. If the
rotor core is allowed to drop more than a few millimeters at this point, it will make
contact with the stator windings and may damage them.
RE-ASSEMBLY IS A REVERSAL OF THE ABOVE PROCEDURE.
Before assembly of a single bearing rotor into stator housing check that the drive discs are not
damaged or cracked or showing any other signs of fatigue. Also check that holes in the discs
for drive xing screws are not elongated.
Damaged components must be replaced.
TWO BEARING MACHINES
NOTE:
Position rotor, if possible, such that a full pole face is at bottom dead center.
The procedure for removal of a two bearing rotor is similar to that outlined for single bearing
machines with the exception of Steps 4 and 5 relating to the drive end adaptor.
For removal of this item proceed as follows:-
1. Remove the 8 bolts holding drive end adaptor to frame and 4 olts retaining bearing cartridge
in drive end bracket (outer 4 bolts), if tted./
2. With rope sling around the shaft extension, supporting the roto weight tap the drive end
bracket spigot out of its locating recess and lower rotor assembly to rest in the stator bore.
3. Take the weight of the drive end bracket on the sling and tap the bracket off the drive end
bearing cartridge. guide over the and remove.
Re-assembly is a reversal of the above procedure.
8.6 RETURNING TO SERVICE
After rectication of any faults found, remove all test connections and reconnect all control
system leads. Restart the set and adjust VOLTS control potentiometer on AVR BY slowly
turning clockwise until rated voltage is obtained. Ret all terminal box covers/access covers
and reconnect heater supply.
Failure to ret all guards, Access covers and terminal box covers can result in personal injury
or death.
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