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Page Title: APU GOVERNOR
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TM 5-4210-233-14&P-1 5-79.  APU GOVERNOR This task covers: a. Removal d. Adjustment b. Inspection/Repair e. Follow-on Maintenance c. Installation TOOLS REQUIRED EQUIPMENT CONDITION Tool Kit, General Mechanics, Automotive APU Removed (see para 4-207.) (Appendix B, Section III, Item 1) Gear Cover Removed (see 5-68.) MATERIALS/PARTS REQUIRED Grease (Item 53, Appendix E) a. Removal. (1) Remove snap ring (1) from camshaft center pin (2) and slide cup (3) off.  Remove twin governor fly balls (4). NOTE Be   sure   to   catch   the ten   fly   balls   that   will fall   when   the   cup   is removed, b. Inspection/Repair. (1) Replace  any  fly  balls  that  have  flat  spots  or  grooves; Replace the cup if the race surface is grooved or rough. The  governor  cup  must  be  a  free  spinning  fit  on  the camshaft     center     pin,     but     should     be     replaced     if excessively loose or wobbly. (2) Check   the   distance   the   center   pin   extends   from   the camshaft gear; this distance must be 25/32 in. (20 mm) to give the proper travel distance for the cup.  If it is less, the  engine  may  race;  if  more,  the  cup  will  not  hold  the balls properly.  If the distance is too great, drive or press the center pin in.  If it too small, replace the pin; it cannot be removed without damaging its surface. NOTE In  some  cases,  if  the  distance  is  too  small,  the  head  of  the governor cup can be ground to give the necessary 25/32 in.  (20 mm) extension. c. Installation. (1) Tip the front of the unit upward, set the fly balls (4) in their recesses. (2) Position governor cup (3) on center pin (2). (3) Brush governor ball area with heavy grease (Item 53, Appendix E) and install snap ring (1) on the center pin (2). 5-404

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