TM 5-6115-593-12 TO 35C2-3-463-1 Section XV.  MAINTENANCE OF DOCUMENT COMPARTMENT 4-46. DOCUMENT COMPARTMENT.  (See figure 4-25.) a. Replacement.  The document compartment is mounted above the control cubicle. (1) Removal.      Remove   six   screws   (1), lockwashers (2), and nuts (3) supporting  document  compartment  of the control cubicle. (2) Installation. Install document compartment   on   top   of   the   control cubicle. Line up six holes in document compartment with holes on top of control cubicle. Attach  six  screws  (1),  lockwashers  (2),  and nuts (3). b. Repair. (1) Replace gasket (12) if defective. (2) Replace    latches    (8)    by    removing screws (6), nuts (7) and spacer (9). (3) If  dented,  straighten  out.  If  any  signs of  rust  or  corrosion,  sand  and  clean area, and repaint document compartment. Section XVI.  MAINTENANCE OF SUPPORT FRAME ASSEMBLY 4-47. GENERAL.  The support frame assembly (figure 4-26)   provides   support   for   major   assemblies   of   the generator  set,  acts  as  a  spreader  bar  when  lifting  the set, and provides a frame for the housing kit (when the kit is used). 4-48.  INSPECTION.    Inspect  the  tie  bars,  front  frame, center    frame,    and    rear    frame    for    loose    mounting, breaks,     cracks,     loose     or     missing     hardware,     and corrosion.  Refer to higher level maintenance for repair of replacement. Section XVII.  MAINTENANCE OF RADIATOR ASSEMBLY 4-49. RADIATOR ASSEMBLY. a. Preliminary Inspection. Preliminary inspections   consist   of   checking   for   leaks (especially at hose connections), and coolant  level  may  be  checked  at  the  sight glass.    If  coolant  level  is  below  sight  glass, remove   radiator   cap   and   check   level   in upper tank. WARNING Whenever  generator  set  has  just  been  shut  down, remove   radiator   cap   slowly   to   allow   pressure   to escape before removing cap. Refill   radiator   with   proper   cool-   ant   to approximately   2   inches   (50   mm)   below filler neck level. Using    a    hydrometer,    verify    that    antifreeze    is    in accordance with table 3-1. b. Fan Belt Adjustment (Code A). (1) Refer  to  figure  4-28  and  remove  two halves of fan belt guard (3) by removing screws (1) and nuts (2). (2) Check tension of each of the three fan belts (see figures 4-1 and 4-28).  Apply thumb pressure at center of belt and check for no more than 1/2 inch (13 mm) movement, as shown in figure 4-28. (3) If    belts    require    tensioning,    tighten motor mount 4-76