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Copyright © 2012 Kato Engineering, Inc. All rights reserved
IMPORTANT: The following procedures are
meant to be a general guide. Procedures for
your unit may vary.
WARNING: Ensure the generator
has stopped and is de-energized before
disassembly. A rotating generator is always
producing some voltage and contact with
the leads or other devices connected may
result in serious injury or death
WARNING: Use a hoist and slings
or chains to support components during
removal. Use lifting devices that are
selected for generator component weights.
Improper lifting techniques may cause
serious injury or death. Be extremely
careful not to damage components.
NOTICE: Ensure the generator fi eld wires
are fl at in the wireway so they don’t tear
during pulling. Do not pull on the edges of
the heat sinks or on the exciter armature
windings.
NOTICE: Make sure the pipe is strong
enough to support the weight of the rotor
and that it does not have rough edges on
the inside, which could damage the shaft.
NOTICE: To prevent tension on the shaft,
put the slings around the largest shaft step
possible.
NOTICE: Make sure the rotor does not
rest on the stator during the stages of
movement. Make sure the rotor does not hit
the stator.
Disassembly
Overall disassembly
1. Remove the terminal box cover, and disconnect the load leads and
all other leads. Tag the leads to ensure they are correctly connected
when the generator is reassembled.
2. Remove the bolts securing the generator to the base and prime
mover, and move the generator to an area that allows suffi cient room
for disassembly.
3. Remove the coupling or drive plates.
4. Remove the exciter cover.
5. Remove the clips securing the exciter fi eld leads to the exciter frame
and endbracket. Disconnect the leads and remove the exciter frame/
stator and/or exciter-PMG frame/stator.
6. Remove the (optional) PMG and exciter armature as described
below.
7. Support the shaft. Remove the exciter-end endbracket bolts, and
remove the endbracket. Tap lightly with a rubber or fi ber mallet
to loosen the endbracket if necessary. Repeat with the drive-end
endbracket (if applicable).
8. Remove the fan from the hub where applicable. If necessary, make
sure to mark the location of the fan for reinstallation.
9. Float out the rotor (see Figure 25). First attach a pipe over the shaft
on the drive end. Attach slings around the pipe on one end and
around the shaft on the opposite end. Lift up the rotor, and move it
out, resting the rotor as the slings are moved down the pipe for the
next lifting stage.
