TM 5-6115-275-14 NAVFAC P-8-615-14 TO 35C2-3-452-1 d. Cleaning, Inspection, and Repair. WARNING Clean   all   parts   in   a   well-ventilated area.     Avoid     inhalation     of     solvent fumes    and    prolonged    exposure    of skin to cleaning solvent. Wash exposed skin thoroughly. Dry cleaning  solvent  (Fed.  Spec.  P-D-680 and  P-S-661)  used  to  clean  parts  is potentially   dangerous   to    personnel and  property.  Do  not  use  near  open flame  or  excessive  heat.  Flash  point of solvent is 100°F (38 C). (1) Clean   items   with   cleaning   solvent,   Fed. Spec. P-D-680 or P-S-66 1, and dry thoroughly. (2) Inspect the ball bearing to be sure it moves smoothly and quietly and for evidence of excessive wear. Replace a noisy, loose, or worn ball bearing. (3) Inspect   the   rotor   shaft   at   each   end   for evidence of nicks, rust, or wear. Use a fine file to remove rust, burrs, or fine ridges, inspect the  rotor  assembly  to be  sure  all  windings  are  properly  pressed  into  the  core slots. Inspect core for wear and replace a badly  scored or defective rotor assembly. (4) Inspect   the   field   windings   and   leads   for broken  or  damaged  wires.  Inspect  the  main  frame  for damage   and   broken   welds   and   for   nicks   and   burrs around   the   mounting   flanges.   Remove   all   defective wiring  that  can  be  replaced  without  disturbing  the  main field windings. (5) Inspect  all  hardware  for  defective  threads. Replace damaged or missing parts. (6) Inspect  the  wiring  and  plug  connector  for defects and replace all defective parts. (7) If  the  field  windings  and  coils  have  been replaced,     follow     the     instructions     listed     below     for varnishing and baking: (a) Varnish     and Baking Procedure. Varnish and baking information is furnished to reinsulate windings  where  the  varnish  has  deteriorated  or  when windings  and  coils  have  been  replaced.  Varnish  shall conform  to  Military  Specification  MIL-V-  1  37A  Type  M, Grade CB. (b) Dipping and Baking Procedure. 1. Stator (Alternator). (a)   To  be  clean  and  free  of  all foreign matter. (b)   Mask machined surface. (c)   Set  oven  at  300°F  (149°C) and   heat   part   until   it   reaches   290°-300°F.   (143°C- 149°C.). (d)   With    part    at    290°-300°F. (143°-149°C.),   dip   in   varnish   for   2   minutes   or   until bubbling ceases and drain for 6-8 minutes. (e)   Bake  for  from  2  hours  to  2 hours and 40 minutes at 300°F. (149°C.). (f) Dip for 2 minutes in varnish and drain for 4-6 minutes. (g)   Repeat step e. (h)   Repeat step f. (i) Repeat step e. (j) Remove masking and clean surface. 2. Rotor (Alternator). (a)   To  be  clean  and  free  of  all foreign matter. (b)   Mack machines surfaces. (c)   Preheat     assembly     for     3 hours at 260°F(127°C) + 15°-0°F.(-9°C). (d)   Resin   to   be   maintained   at 75 ° to 85 °F (24°C. to 29°C). during processing. (e)   Rotate  at  15-20  rpm   while assembly  is  immersed  in  resin  to  a  depth  sufficient  to cover  windings.  Rotate  for  10  minutes  minimum  while maintaining  copper  temperatures  at  260°F.  (127°C)  + 15° (-9°C)-0°F. (f) Remove assembly from resin  and  continue  to  rotate  for  30  minutes.  Maintain copper temperature at 300°F. (149°C) + 20°-0°F. (-7 C). (g)   With   axis   of   assembly   in vertical position, cure for 1 hour at 300°F (149°C.) +20°- O0F. (-7°C.), plus 4 hours at 350°F. (177°C.) + 15-0° F. (-9°C). (h)   Remove masking and clean surface. NOTE Fungus treatment requires 1 additional dipping and baking. 3. Exciter Armature (a)   To  be  clean  and  free  of  all foreign matter. (b)   Mask machined surface. (c)   Set  oven  at  300°F  (149°C) and   heat   part   until   it   reaches   290°F   (143°C)-   300°F (149°C.). (d)   With    part    at    290°-300°F. (143°C-149°C.),   dip   in   varnish   for   2   minutes   or   until bubbling ceases and drain for 6-8 minutes. (e)   Bake  for  35-45  minutes  at 350°F. (177°C.). Change 8     8-17