TM   5-2815-241-34&P ROCKER   ARM   HOUSING   REMOVAL INITIAL  SETUP Tools Materials/Parts Handle,   ratchet,   3/8-inch   drive Mallet,  rubber Screwdriver,    flat-tip,    3/8-inch Socket,   7/16-inch,   3/8-inch   drive Wrench,   box-end,   5/8-inch Wrench,   box-end,   3/4-inch Tags,  marker  (item  17,  appendix  B) Equipment   Condition Engine  compression  brake  housings  removed (page  2-28). ACTION LOCATION ITEM REMARKS NOTE Before  performing  following  steps,  tag  rocker  arm  housings  with  location  on  engine. Steps given are typical for all three rocker arm housings. 1. Intake and exhaust valve   rocker arms (1) Locknut  (2)  and adjusting   screw   (3) 2.  Fuel injector rocker Locknut  (5)  and arm (4) adjusting   screw   (6) Using  3/4-inch  box-end  wrench  and  3/8- inch  flat-tip  screwdriver,  loosen  locknut  and unscrew  adjusting  screw  until  rocker  arm moves   freely. Using   3/8-inch   drive   7/16-inch   socket, ratchet   handle,   and   3/4-inch   box-end wrench,  loosen  locknut  and  unscrew  adjust- ing screw until rocker arm moves freely. NOTE Rocker arm studs are different lengths. Before performing step 3, tag rocker arm studs. See  illustration  for  location  and  lengths. TA  242353 2-30