d. Removal of Bearing with Generator Installed.
(1) Disconnect the positive battery cable.
(2) Remove paralleling receptacle panel.
(a) Disconnect the paralleling receptacles.
(b) Tag each receptacle for proper location.
(3) Remove manual speed control panel.
(a) Disconnect flexible cable from manual
speed control knob.
(b) Disconnect electrical connector from
the Remote Control Box.
(4) Generator rear grille and access doors are
now detached and may be removed.
(5) Remove transformer protective cover.
(6) Remove the load terminal board (TB6).
(7) Sequentially remove and tag each of the
twelve generator leads on the rear of the load ter-
minal board.
(8) Sequentially route the generator output
leads back to the generator through their respective
current transformers.
(See fig. 6-2)
(9) Disconnect the exciter field leads from
TB16 posts 15 and 16 and route the leads back to the
generator.
(10) For removal of bearing, refer to f steps
(1) through (4) inclusive.
(11) Reassemble in reverse order of disassem-
bly.
e. Removal. Refer to paragraph 2-12 to remove
main generator.
f. Disassembly.
See figure 9-1 and disassemble
in the order of sequence numbers observing the fol-
lowing.
(1) Break endbell fit by tapping on knock off
lugs located in the 45 degree positions. Slide endbell
axially off the bearing.
Pass stator leads through
endbell opening as endbell is removed from the stator.
(2) The exciter stator maybe removed from
the endbell assembly by removing or drilling out the
dowel pin (26). only a small force is needed to re-
move the stator.
(3) Remove screw with an Allen wrench and
then remove bearing retainer.
(4) Pull the bearing (33) with a suitable bear-
ing puller and replace with new bearing.
(5) To remove the rotating diode assembly,
bend up the lock tab on lockwasher and unscrew the
locknut.
(6) Unscrew the generator field leads from the
plate (8), (fig. 9-2) and unsolder the six exciter
leads from the diodes. These leads should be tagged
to maintain the polarity of the diodes when reassem-
bled.
CAUTION
Use a soldering iron no larger than 100
watts and as little time and force as pos-
sible to unsolder the leads. The diodes
can be damaged by excess heat or force
sufficient to bend the stem or break the
glass seal.
(7) The surge protector may be removed from
the rotating diode assembly.
(8) After the leads are disconnected, the rec
tifier assembly (fig. 9-2), key and spring washer
will slide off the shaft.
(9) To remove the rotor assembly from the
stator proceed as follows:
Slide the rotor through the
stator toward the drive end far enough so that a sling
may be placed under the generator field core. Hoist
the rotor slightly to free it. Pull the rotor axially
while applying leverage at the drive end to balance
the rotor on the sling.
It may take one or two repo-
sitioning of the sling to get the sling near the center
of the rotor core for proper balancing of the assembly,
(10) The exciter rotor may be removed from
the shaft by using a bearing puller near the outside
diameter. Be careful not to bear on windings if ex-
citer rotor is to be reused.
(11) Balance plates are shrunk on the shaft
and may be removed with heat. Apply heat with a
torch to the hub of the balance plate. Move the torch
around the periphery of the hub using care not to
apply the torch to the shaft. The balance plate bore
will expand and the balance plate may be removed
manually.
(12) The coupling hub is shrunk fit on the shaft.
To remove, use a cutting torch to cut through the hub
at the keyway to prevent shaft damage. After cutting
through, use a chisel in the cut to open the bore and
remove the hub.
(13) The generator stator core is not to be re-
moved from the stat or frame because the concentri-
city between bore and rabbit fits would be disturbed
and cause voltage modulation problems. When re-
moving the rotor stack from the shaft, remove in the
direction, that the stack was pressed on.
9-4
