TM 9-6115-604-34
NAVFAC P-8-633-34
c.
Exciter Rotor Assembly.
(1)
Remove.
(a) Perform paragraph 5-6, step a(l) through (3).
(b) Remove rotating rectifier assembly (detail A, Figure 5-1) in accordance with paragraph 5-7, step b.
(c) Remove hexagon head capscrews (12) and belleville washer (9) holding exciter rotor assembly (13) to
the main rotor assembly (15) shaft.
(d) Thread an 8 inch (195 mm), 314-16NF capscrew into the aluminum standoff (14) inside exciter rotor to
push against the end of the main rotor assembly shaft (15). Carefully feed the generator rotor field leads
through the lead hole in the standoff (14) to protect the leads from damage during removing of the exciter
rotor assembly. Tape the generator field leads onto the main rotor assembly (15) keyway shaft to protect
against damage of main rotor is to be removed.
(e) Remove 8 inch (195 mm) 314-16NF capscrew from aluminum standoff (14) when exciter rotor
assembly comes off the main rotor (15) shaft.
(2)
Inspect and Clean.
(a) Clean dust and dirt from the exciter rotor assembly with a soft doth or brush.
(b) Check the exciter rotor assembly (13, Figure 5-1) for loose, frayed or burnt windings and other damage.
Check the aluminum standoff (14) inside for possible damage.
(3)
Repair. Repair of the exciter rotor assembly is limited to replacement of the aluminum standoff (14), if
damaged. Rewinding of the coil is done by the depot or the manufacturer.
(a) Disassemble. See detail A, Figure 5-1. Remove aluminum standoff (14) from wound armature
assembly (52) by removing hexagon head screws (50) and lockwashers (51).
(b) Assemble. See Figure 5-1. Install aluminum standoff (14) on wound armature assembly (52) and
secure with hexagon head screws (50) and lockwashers (51). Tighten hexagon head screws (50) to 25
pound-feet (34 newton-meters).
d.
Exciter Stator Assembly.
(1)
Remove
(a) Remove rotating rectifier assembly in accordance with paragraph 5-7, step b.
(b) Remove exciter rotor assembly in accordance with paragraph 5-7, step c.
(c) Tag and disconnect exciter stator field wires Fl and F2 from terminal strip TBl 04 (12, Figure 5-2) on left
side of conduit box assembly.
(d) Remove nylon tiewraps holding exciter stator field wires to the bracket (19, Figure 5-1).
(e) Remove hexagon head capscrews (8) and belleville washers (9) to remove lead shield (11) and exciter
stator assembly (10). Mark the exciter stator 'top front for future reference during installation.
NOTE
Ensure that adequate support is provided when removing or installing exciter
stator assembly, both for ease in removing mounting screws and to prevent the
exciter stator assembly (10) and lead shield (11) from falling when mounting
hardware is removed.
(2)
Inspect.
(a) Visually check the exciter stator winding for loose, frayed. or burnt winding.
(b) Look for score marks in the bore of the exciter core caused by rubbing. If evidence of rubbing is found,
perform megohmmeter test and determine cause of rubbing. Replace a damaged exciter stator.
(3)
Clean. Clean dust and dirt from the exciter stator winding with a soft cloth or brush.
(4)
Repair. Repair of the exciter stator is limited to replacement of the item. Winding repair may be
performed by depot or the manufacturer.
5-11
