(2)
Removing the Exciter Armature
Leads may be damaged if armature is turned too far in either direction.
Attempt to loosen exciter armature on shaft by rotating it slightly back and forth. If armature
cannot be loosened by hand, use two 3/8 - 16 X 5-inch hex-head bolts as shown in Figure 5 to
force the exciter armature off the shaft. Turn each of the two screws a few turns at a time into
the threaded holes of the diode mounting plate until the exciter armature is sufficiently loosened
from the shaft to be removed from it by hand. Remove it slowly from the shaft and at the same
time observe the following
CAUTION.
Pay close attention to field leads while pulling exciter armature from shaft. Make
CERTAIN
that the leads stay in the 1/2" keyway. One mechanic should watch
them constantly while another operates the puller. Make certain that leads do
not catch and be sure that they slide smoothly through hole (“B”, Fig. 2)
Straighten leads and remove kinks as required to avoid damage to insulation.
CAUTION
CAUTION
Location of Exciter Armature Machine Key
Figure 4
OM-2084 / Operation and Maintenance Manual
90CU24 / Series 500392 Generator Sets
November 27/1997
Chapter 3-1
Page 5
Содержание 90CU24
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