TM 10-3930-653-14&P (3) Check for hunting The   term   "Hunting"   means   sudden   fluctuation   of engine   speed   accompanied   by   vibration.      Be   sure   to check  engine  for  hunting  when  maximum  engine  speed under no-load as well as rated output has been adjusted. 1.    Cam set screw 2.    Cam 3.    Cam adjusting plate Fig. 4-147. a. Stop  hydraulic  mechanism,  place  gear  in  neutral, and idle engine. b. Suddenly    depress    accelerator    pedal    under    this condition,  and  make  certain  that  hunting  ceases  after repeating three times or less, or within 9 seconds. If hunting repeats more that three times, or within 9 seconds, proceed as follows: a.      Turn   adjusting   spring   handle   by   one-eighth   of   a revolution  counterclockwise,  and  every  time  begin  with adjustment of maximum engine speed under no-load as described in paragraph "a." above. b. If   hunting   still   remains   it   may   be   eliminated   by adjusting  the  cam,  but  this  should  be  avoided  as  far  as possible because it is very delicate and is liable to affect engine performance. c. Shift  cam  set  screw  in  direction  of  arrow  mark  in Fig. 6-28 and secure cam.  By doing so, hunting may be remedied easily. d. After adjustment, begin once more with adjustment of maximum no-load speed as described above. e. Place  a  piece  of  wire  through  the  hole  provided  in the head of the adjusting handle stopper and through the hole in the body to prevent handle stopper from turning. Fig. 4-148.  Holding Adjusting Handle Stopper from Turning 4-82