TM  5-6115-329-14 TO  35C2-3-440-1 CHAPTER 10 MAINTENANCE OF THE GENERATOR 10-1.  General The generator housing is directly coupled to the Military Standard engine. The generator is a direct drive  alternator  type,  single  phase,  fully  inclosed with fan type cooling and sealed bearings. 10-2. On-Equipment Testing On-Equipment   electrical   test   procedures   may provide  a  basis  for  determining  the  necessity  and extent of generator repair. Take into consideration the test instrument used, test lead resistance, and the ambient temperature at the time of the test. If more precise measurements are required, use an in- strument such as a Kelvin Balance or a Wheatstone Bridge  and  make  comparative  measurements  be- tween the suspected component and a like item that is known to be good. 10-3.  Generator 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)  used  to  clean parts   is   potentially   dangerous   to   per- sonnel and property. Do not use near open  flame  or  excessive  heat.  Flash point  of  solvent  is  100°  to  138^OF.  (38°  to 59°C. ). a. Removal and Diasassembly. (1)   Remove   engine-generator   from   carrying frame (para. 8-2). (2) Remove control panel assembly (para. 9-2). (3)  Disconnect  fuel  line  from  fuel  pump  (fig. 4-30). (4)  Remove  screws  securing  control  panel bracket  to  generator  housing  and  remove  bracket from generator (fig. 6-3). (5)  Remove  screws  and  washers  securing  the upper and lower fuel tank brackets to the generator housing and remove brackets. (6)  Remove  screws  (1,  fig.  6-4)  from  end  cap (2) and remove end cap. (7) Remove motor drive machine bolt (3). (8) Remove nuts (4), bolts (5), and washers (6) securing the generator housing and stator (7) to the engine end bell and remove housing and stator. (9)  Remove  bearing  (8)  from  end  of  engine shaft . (10)  Insert  special  tool  (table  5-1)  into  out- board end of rotor and thread in until rotor assem- bly becomes free of shaft and remove rotor (9). (11) Remove fan (10) from rotor. (12)  Remove  bolts  (11)  securing  engine  end bell (12) to engine housing and remove end bell. b. Cleaning. (1) Clean the adapter, fan, and outside surface of the generator housing with a cloth dampened in cleaning solvent, Fed. Spec. P-D-680, and dry thor- oughly. (2) Clean stator and rotor using dry low pres- sure compressed air. c. Inspection and Repair. (1)  Inspect  bearing  for  a  binding  or  sticking condition and for excessive wear. Replace defective bearing. (2)  Inspect  adapter  and  fan  for  cracks  or breaks. Replace defective adapter or fan. (3) Inspect rotor and stator for damaged coils, faulty  insulation  and  for  evidence  of  overheating. Replace defective rotor or stator. d. Assembly and Installation. (1) Install engine end bell (12, fig. 6-4) to the engine housing with bolts (11). (2)  Thread  fan  (10)  onto  rotor  (9)  and  install fan and rotor on engine shaft. (3) Install bearing (8) on engine shaft. (4) Position housing and stator (7) in place on end  bell  and  secure  with  washers  (6),  screws  (5),  and nuts (4). (5) Install motor drive machine bolt (3). (6)  Install  end  cap  (2)  to  generator  housing with screws (1). (7) Install control panel mounting on the gen- erator housing. (8)   Install   the   upper   and   lower   fuel   tank brackets to the generator housing. (9)  Attach  fuel  line  (fig.  4-30). (10) Install control panel assembly (para. 9-2). (11)   Install   engine-generator   in   carrying frame. 10-1/10-2  (Blank)