f. Repeat  steps  b  through  e  for  cylinder  number two. g. Attach cylinder head cover to cylinder head. h. Install glow plug in cylinder head cover. i. Reconnect   negative   battery   cable   to   negative terminal of battery. 5-21.  ENGINE COMPRESSION ADJUSTMENT (See Figures  5-15,  16).    To  check  the  compression  and  to adjust compression, proceed as follows: a. Turn     flywheel     in     direction     of     rotation     until compression resistance is first noticed. b. Check  and  record  measurement  "A"  (see  figure 5-16). In the decompressed position, the valve must  open  just  far  enough  so  that  the engine    can    be    turned    over    without resistance.    Do  not  allow  the  valve  to touch the piston. c. Loosen  lock  nut  (a)  and  adjustment  screw  (6) using a feeler gauge set at 0.012 inch (0.3 mm). Using a pair of pliers, adjust screw. d. Tighten   lock   nut   (a)   while   holding   adjustment screws   (b)   with   pliers.      Recheck   for   correct clearance after lock nut (a) is tightened. 5-22.    Fuel  Injector  Nozzle  Replacement  (Figure  5-17). To replace the fuel injector nozzle, proceed as follows: Figure 5-16.  Engine Compression Adjustment Tolerances a. Using a 12 mm  wrench unscrew the banjo bolts attaching  the  fuel  leak-off  lines  to  the  injectors. Remove fluid passage bolt, gaskets, and spacer from injector and fuel leak-off hose. b. Disconnect  fuel  lines  at  fuel  injectors.    Remove fuel injector from cylinder head. c. Remove   two   M8   nuts   and   lock   washers   from injector clamp using a 13 mm wrench.  Remove fuel injector clamp. d. To   disassemble   fuel   injector,   unscrew   nozzle holder    from    retainer    nut.        Remove    shims, pressure  spring,  pressure  spindle,  intermediate disc, and nozzle from nozzle holder. e. Replace nozzle with a new nozzle. NOTE Test repaired fuel injector in accordance with  instructions  set  forth  in  Section  VI, paragraph 6-39, Fuel Injector Assembly. f. Place   new   nozzle,   intermediate   disc,   pressure spindle,  pressure  spring,  and  shims  in  retainer nut.    Coat  threads  of  nozzle  holder  with  a  light coating   of   oil,   per   Military   Specification   MILL- 2104  or  equivalent.    Screw  nozzle  holder  into retainer  nut.    Tighten  holder  to  63  pounds-foot (85Nm) torque. Make certain washer is properly positioned in cavity of cylinder head. g. Place assembled fuel injector in cavity of cylinder head. h. Place clamp over injector. i. Attach clamp to cylinder head using two washers and nuts. j. Connect fuel pressure lines to injector. k. Connect    fuel    leak-off    hose    to    injector    using spacer, washers, and a fluid passage bolt. l. Repeat    steps    a    through    k    for    fuel    injector number two. 5-24.         LUBRICATION      INSTRUCTIONS.      Points   of lubrication,    type    of    lubricant,    application,    and    time interval are listed in Table 5-3.  Detailed instructions are as follows: NOTE So oil will flow more freely, drain oil from the engine crankcase while the engine is hot. 5-14