OM-2245 / Operation and Maintenance Manual
ITW GSE 4400 / 400 Hz. Generator Set
March 15, 2015
Chapter 3-1
Page 6
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 the hole (Figure 3-1-2). Straighten leads and
remove kinks as required to avoid damage to insulation.
4) Exciter Armature Installation
a) Preparation for Exciter Armature Installation
(1) Clean generator shaft and exciter armature bore. Remove all rust, corrosion, etc.
(2) Make
CERTAIN
that the leads are tucked into the 1/2" keyway, which is opposite from the 3/8"
keyway in the generator armature shaft.
Figure 3-1-4 Exciter Armature Removal
(3) Route the revolving field leads (step 2 above) through exciter armature hole (Figure 3-1-2), which
is opposite the keyway.
(4) Align armature keyway with key in shaft and start armature on shaft.
