TM  9-2350-261-20-1 Table 2-1.   Unit Level Preventive Maintenance Checks and Services  for M113A2  FOV Item   Interval   Item   To No. Be Inspected Procedure Not   Mission Capable   If: 4 Semi- Governed Run engine at 800 rpm for 3-5 minutes Annual   No-Load with  range  selector  in  2-3  range  and Test brakes   locked   until   normal   operating temperature  is  reached. If  outside  air  temperature  is  less  than 85°   F   (29°,   normal   operating   tem- perature should be 160° to 200° F (71° to  93°C  If  outside  air    temperature    is greater  than  85°  (29°C,  normal  oper- ating   temperature   should   he   160°   to 230°  F  (71°  to  110°C. With  engine  quick-disconnect  lever  in NEUTRAL,  slowly  open  throttle  con- trol   until   accelerator   is   fully   de- pressed. When  you  suspect  a  faulty  gover- nor,  do  not  exceed  3,000  rpm  en- gine   speed   for   more   than   2   or   3 seconds. Engine  speed  may  exceed  3,000  rpm Governor   cuts   in momentarily,  but  should  stabilize  at and  out,  or  surges  at 2,925 to 2,975 rpm. this  speed,  adjust- 5 S e m i -   S t a ll ments   are   needed. The   stall   check   will   tell   you   if   the Annual Check power   plant   is   producing   maximum Notify  higher  main- tenance   level. power.    If  it  is  not,  the  check  will  tell you   whether   the   engine   or   transmis- sion  is  at  fault. NOTE If  check  fails  and  a  faulty  tachom- eter  is  suspected,  verify  tachom- eter reading by performing STE- ICE   check   number   10  (page   3- 284)  before  sending  to  next  higher leve1 of maintenance. Run engine at 800 rpm for 3-5 minutes with  range  selector  in  2-3  range  and brakes  locked  until  normal  engine  op- erating   temperature   is   reached If  outside  air  temperature  is  less  than 85°  C  (29°  C),  normal  operating  tem- perature should be 160° to 200° F (71° to 93° C). 2-44   Change   4