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1
WARNING
The armature must be dismantled or reassembled from the drive end side of the stator.
Dismantling
R
Make sure the machine and fan motor are
electrically disconnected.
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Remove air ducts (if present at installation),
disconnect coupling or V-belts and dismantle
the machine from the foundation.
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Remove accessories if necessary as well as
inspection covers.
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Loosen the leads and cables inside the termi-
nal box which go to the stator.
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Disconnect leads which go to the stator from
the brush rocker.
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Remove the brushes and wrap a piece of
1 mm thick insulating material around the
commutator.
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Put blocks underneath the stator so that both
end shields are unsupported.
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Remove the terminal box.
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Remove N-end outer bearing cover.
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Place a piece of insulating material between
armature and stator.
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Unscrew the fixing bolts which tie stator and
end shield together at the N-end.
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Remove the end shield at the N-end. Do not
damage the main gasket between end shield
and stator. Do not use sharp-edged tools.
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Remove the outer bearing cover at the D-end.
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Unscrew the end shield fixing bolts at the
D-end. Use the same precautions regarding
the main gasket.
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Lift the armature out of the stator (if neces-
sary use an extension tube slipped over the
armature shaft).
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Protect the bearings against contamination
by suitable means.
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Remove the main gasket very carefully from
the stator.
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Clean the bearing covers and remove the old
grease.
Reassembling
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Wrap a piece of 1 mm thick insulating
material around the commutator.
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Place a suitable piece of insulating material
into the lower part of the stator.
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Inspect the main gaskets on the stator for
damage. Make sure that the mating surfaces
of stator and end shields are clean.
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Do not forget to fill the bearings with grease
during assembly.
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Lift the armature into the stator.
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Assemble the end shield at the D-end.
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Assemble the bearing details at the D-end.
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Assemble the end shield at the N-end.
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Remove the piece of insulating material.
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Thread the cables through the seal into the
terminal box.
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Assemble the bearing details at the N-end.
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Check that the armature turns easily.
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Fasten the leads to the brush gear.
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Assemble the terminal box and attach cables
and leads according to the terminal diagram.
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Remove the protective insulating material
from the commutator.
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Insert brushes into brush holders and check
that they can move freely in their brush hold-
er pockets.
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Assemble inspection covers including
gaskets.
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Assemble all accessories.
Tightening torque for stator bolts
Dismantling and reassembling
D-end
N-end
Fig. 27
DMI
Torque with oil lubrication
10
190 Nm
(10 lb.ft)
00
190 Nm
(10 lb.ft)
0 Nm
(10 lb.ft)
0
Nm
(0 lb.ft)
0
Nm
(0 lb.ft)
1
0 Nm
(10 Ib.ft)
00
Nm
(0 Ib.ft)