TM  9-2815-237-34 2-32.  FUEL  INJECTION  PUMP  REPAIR  (cont’d) 75. 76. 77. 78. 79. 80. 81. 82. CAUTION Tightly wound coils on idle spring must be installed facing throttle block, or injection pump may malfunction. Install  idle  spring  (1)  on  pushrod  (2). NOTE l Perform step 76 for vehicles with pre-1990 6.2L engines. l Perform steps 77 through 79 for vehicles with 6.5L and 1990 and above  6.2L  engines. With throttle shaft (8) in wide open position, install min-max governor (4) on notch of throttle shaft (8). Rotate  throttle  shaft  (8)  to  low  idle  position  and  lower  min-max  governor  (4)  into  housing  (5). Insert  inner  governor  spring  (9)  into  pushrod  (2). With  throttle  shaft  (8)  in  wide  open  position,  install  min-max  governor  (4)  on  notch  of  throttle shaft  (8)  and  position  tang  (12)  of  thrust  spring  (11)  in  groove  on  throttle  block  (3).  Rotate  throttle shaft  (8)  to  low  idle  position  and  lower  min-max  governor  (4)  into  housing  (5). Hook  tang  (10)  of  thrust  spring  (11)  in  groove  (13)  of  housing  (5). CAUTION Guide  stud  must  be  installed  between  metering  valve  arm  and  spring. Incorrect  installation  may  cause  injection  pump  to  malfunction. NOTE l Perform steps 80 and 81 for vehicles with 6.5L and 1990 and above  6.2L  engines. l Perform step 82 for vehicles with pre-1990 6.2L engines. Install nut (17) and seal (16) on guide stud (7). Install guide stud (7) in housing (5) between metering valve arm (15) and spring (14) and into min-max governor (4). Tighten guide stud (7) to  80-90  lb-in.  (9-10  N•m)  using  1/4-in.  hex  head  driver. Install  cap  (18)  on  guide  stud  (7). Install guide stud (7) and washer (6) in housing (5) between metering valve arm (15) and spring  (14)  and  into  min-max  governor  (4).  Tighten  guide  stud  (7)  to  80-90  lb-in-  (9-10  N•m) using  1/4-in.  hex  head  driver. 2-120