TM  5-2815-241-34&P CROSSHEAD   INSTALLATION INITIAL   SETUP Tools Equipment   Condition Adapter  set,  torque,  ST-669,  3/8- inch   drive Gage,  thickness Handle,   ratchet,   3/8-inch   drive Socket,  9/16-inch,  3/8-inch  drive Wrench,  torque,  0  to  150  ft  lb (0  to  210  N•m),  3/8-inch  drive Cylinder  heads  installed  (page  2-68). ACTION LOCATION ITEM REMARKS NOTE Steps given are typical for all 12 crossheads. Crossheads are tagged by location from front cylinder to rear cylinder. Check tags for location.  See  illustration. Wide crossheads are for exhaust valves and narrow crossheads are for intake valves. 1.  Cylinder  head  (1) Crosshead  (2) Put  on. Adjusting  screw  must  face  exhaust side  of  engine. 2.  Crosshead  (2) Locknut  (3)  and  ad- justing  screw  (4) Using  3/8-inch  drive  ST-669  torque  adapter set,  9/16-inch  socket  and  ratchet  handle, loosen. NOTE When performing step 3, apply light finger pressure to rocker arm contact surface on crosshead. When  using  new  crossheads  and  guides,  advance  adjusting  screw  one-third  turn  to straighten stem on its guide and to compensate for slack in threads. When using old crossheads and guides, it may be necessary to advance the screw one- half turn in order to straighten the stem in its guide. 3.  Crosshead  (2) Adjusting  screw  (4) Using  3/8-inch  drive  ST-669  torque  adapter set,  screw  in  until  adjusting  screw  seats  on valve   stem. Do  not  tighten. 2-80