TM 5-6115-275-14 NAVFAC P-8-615-14 TO 35C2-3-452-1 (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-I-24092,  Type  M, Grade CB. (b) Dipping and Baking Procedure. 1. Stator (a) Maintain the viscosity of varnish of mfgrs recommended value. (b) Parts  shall  be  clean,  free  of  all foreign matters. (c) Preheat part for 2 hours at 290°- 300°F. (143°-149°C.). (d) Cool   part   to   120°-250°F.   (49- 121 °C.) before dipping. (e) Dip  in  varnish  for  2  minutes  or until bubbling ceases and drain for 6-8 minutes. (f) Bake for 4 hours at 290°-300°F. (143°-149°C.). (g) Repeat steps d thru f. (h) Repeat steps d and e. (i) Bake for 8 hours at 290°-300°F. (143°-149°C.). (j) Cool to room temperature. NOTE Do not bake the rotating rectifier assembly.    Keep    varnish    off    rotor shaft. Before beginning varnish procedure,  protect  bearing  and  shaft projection  surfaces.  No  scratches  or marks permitted. 2. Rotor (a) Maintain the viscosity of varnish at mfgrs recommended value. (b) Parts  shall  be  clean,  free  of  all foreign matters. (c) Preheat part for 2 hours at 290°- 300°F. (143°-149°C.). (d) Cool  part  to  120°-250°F.   (40°- 121 °C.) before dipping. (e) Dip  in  varnish  for  2  minutes  or until bubbling ceases and drain for 6-8 minutes. (f) Bake    for    4    hours    at    290°- 300°F(143°-149°C.). (g) Repeat steps d thru f. (h) Repeat steps d and e. (i) Bake for 8 hours at 290°-300°F. (143°-149°C.). (j) Cool to room temperature. 3. Exciter Armature (a) Maintain the viscosity of varnish at mfgrs recommended value. (b) Parts  shall  be  clean,  free  of  all foreign matters. (c) Preheat part for 2 hours at 290°- 300°F. (143°-149°C.). (d) Cool   part   to   120°-250°F.   (49- .121 °C.) before dipping. (e) Dip  in  varnish  for  2  minutes  or until bubbling ceases and drain for 6-8 minutes. (f) Bake for 4 hours at 290°-300°F. (143°-149°C.). (g) Repeat steps d thru f. (h) Repeat steps d and e. (i) Bake for 8 hours at 290°-300°F. (143°-149°C.). (j) Cool at room temperature. 4. Exciter Field (a) Maintain the viscosity of varnish at mfgrs recommended value. (b) Parts  shall  be  clean,  free  of  all foreign matters. (c) Preheat part for 2 hours at 290°- 300°F. (143°-149°C.). (d) Cool   part   to   120°-250°F.   (40'- 121 °C.) before dipping. (e) Dip  in  varnish  for  2  minutes  or until bubbling ceases and drain for 6-8 minutes. (f) Bake    for    4    hours    at    290°- 300°F(143°-149°C.). (g) Repeat steps d thru f. (h) Repeat steps d and e. (i) Bake for 8 hours at 290°-300°F. (143°-149°C.). (j) Cool to room temperature. (9) Refer    to    figures    8-5    and    8-6    for rewinding data if the alternator rotor or the exciter rotor is to be repaired. Change 8  8-7