TM 5-6115-275-14 NAVFAC P-8-615-14 TO 35C2-3-452-1 (22)  Install the drive coupling  assembly  support (2) on rotor shaft (33) and secure it with setscrew (1). (23)  Reassemble     the     two     coupling     halves together with two bolts and nuts. h. Installation. To install generator and  engine  as an assembly refer to paragraph 6-2. To install generator assembly proceed with step 1. (1) Attach a lifting device to the generator lifting eyes located inside the tool box and align generator with engine. (2) Install two generator mounting bolts. (3) Install two coupling bolts. (4) Install    two    bolts    that    secure    generator housing to the engine. (5) Install shrouds and lower support bracket. (6) Install ventilating screen and unit lifting eye. (7) Install    upper    frame    to    skid    with    four lockwashers and nuts. (8) Install   control   cabinet   assembly,   refer   to paragraph 6-1. (9) Install battery, refer to paragraph 4-28. 8-2. GENERATOR (MODEL MEP-023A). a. General.   A   general   description   of   the   Onan Model    O1GFG-408XR/5885A    generator    is    given    in Chapter 1. The stator housing is mounted on the engine flywheel housing and the rotor is mounted on a drive disk which,  in  turn.  is  mounted  on  the  engine  flywheel.  The other   end   is   a   direct-connected,   brushless,   rotating exciter.  The  stator  housing  houses  both  the  generator field windings and the dc exciter frame and windings. b. On-Equipment Testing. (1) Stator (a) Disconnect   the   plug   connector   from the   receptacle   in   the   rear   of   the   control   box   and generator housing. (b) Use  a  multimeter  set  on  RX1  scale and   test   for   continuity   between   contacts   3   and   7, contacts 6 and 8, and contacts 9 and 2. If the multimeter fails to indicate continuity on any of these tests, the stator is defective and must be replaced. (2) Rotor. (a) Remove  the  blower  cover  and  blower wheel (sub-para c. below). (b) Disconnect   rotor   winding   leads   from rectifier.  Using  multimeter  set  on  RX  1  scale,  test  field winding of rotor assembly for a reading of 5.95 ohms + 5%. Make a continuity check from each field winding to the shaft. (3) Exciter Field Windings. (a) Disconnect   the   plug   connector   from the receptacle in the rear of the control box. (b) Use  a  multimeter  set  on  RX1  scale and  test  between  contacts  11  and  13  on  the  plug.  The reading should be within 5% above or below 55 ohms or the windings are faulty and should be replaced. c. Removal and Disassembly. NOTE Removal of the engine and generator as  a  unit  (para  6-2)  is  optional.  The generator  may  be  removed  from  the engine    without    removing    the    unit from the skid base. (1) Refer to  figure  8-8  and  remove  the  blower wheel, stator assembly, and support brackets. 8-12  Change 8