TM 5-6115-590-12 a common load control thermostat, a flow control valve, an    air    mixing    chamber,    two    recirculating    fans    and connecting ducting, tubing and fittings. 4-43.  Bleed Load Control Valve a.  Removal. (1)  Remove tube assemblies (fig.  4-28), and wiring harness connector from load control valve. (2)  Remove clamp holding duct assembly to valve. (3)      Remove   clamp   securing   load   control valve  to  turbine  plenum  and  remove  load  control  valve from power unit. b.  Installation. (1)  Install replacement load control valve in reverse  order  of  removal  procedures  using  new  gaskets and new clamps if required. (2)      Connect   tube   assemblies   and   wiring harness connector to load control valve. 4-44.  Air Pressure Regulator NOTE To   gain   access   to   the   air   pressure regulator,   the   following   interferences must   be   removed:      inlet   air   duct,   oil cooler and ducting and upper plenum. a.  Removal.  Remove tube assemblies (fig.  4-28), two   attaching   bolts,   four   washers,   two   nuts,   and   two attaching  clamps.    Remove  air  pressure  regulator  from engine. b.     Installation.    Install  replacement  air  pressure regulator   on   gas   turbine   engine   in   reverse   order   of removal    procedures    using    new    clamps    as    required. Reconnect tube assemblies using new packing. c.     Adjustment.      After   replacement   of   regulator, check regulator output pressure as follows. (1)    Disconnect  outlet  air  pressure  line  from air pressure regulator and connect a line between the air pressure regulator outlet port and the AIR IN connection (fig.  4-14) on gas turbine engine and analyzer. (2)    Start  and  accelerate  engine  to  no  load governed   speed.      Read   air   pressure   regulator   outlet pressure on AIR gauge on analyzer panel. (3)      Air   pressure   regulator   outlet   pressure shall be 19.  0 to 20.  0 psig. (4)  If pressure is not as specified, shut down engine.  Loosen locknut on end of air pressure regulator and  turn  adjustment  screw  clockwise  to  increase  outlet pressure.  Tighten locknut. (5)  Repeat check procedure until satisfactory adjustment is made.  Disconnect and remove gas turbine engine analyzer. 4-45.  Air Pressure Regulator Filter Element NOTE To   gain   access   to   the   air   pressure regulator,   the   following   interferences must   be   removed:      inlet   air   duct,   oil cooler and ducting, and upper plenum. a.  Removal. (1)      Without   removing   regulator   from   the engine, remove tube assembly from filter element cover on lower end of regulator (fig.  4-28). (2)    Remove  the  clamp  from  the  cover  and unscrew  filter  cover  from  regulator  body,  then  remove filter element, gasket and packing. b.  Cleaning and Inspection. (1)    If  filter  element  is  of  spun  wire  design (coarse  threads  at  base),  clean  using  ultrasonic  method or by washing with an approved cleaning solvent and dry thoroughly with filtered compressed air. (2)    If  filter  element  is  of  wire  mesh  design (no threads), clean using a paint stripping solution. (3)    Inspect  filter  element  for  any  obvious damage. c.  Installation. (1)    Coat  threads  of  regulator  housing  with compound. (2)    Install  satisfactory  or  replacement  filter element  in  reverse  order  of  removal  procedures  using new packing and gasket. (3)  Reconnect tube assembly to filter cover. d.  Adjustment.  After replacement of filter element, check regulator output pressure and adjust if required in accordance with paragraph 4-44c. 4-46.  Load Control Thermostat a.  Removal. (1)  Hold flats on thermostat valve assembly with a wrench and remove tube assembly (fig.  4-28). (2)  Remove one attaching bolt and washer; remove   plate   and   shim   washers,   then   remove   load control thermostat from turbine plenum flange. b.  Installation. (1)  Coat threads of attaching bolt with a thin coat of compound (Fel-Pro C-5). (2)  Install replacement thermostat in turbine plenum  flange  with  side  stamped  "AFT"  facing  rearward or downstream. (3)  Install shim washers to obtain 0.  010 to 0.  020 inch pinch between plate and mounting boss, then install retainer plate. (4)    Secure  with  attaching  washer  and  bolt. Tighten bolt to 50 to 70 inch-pounds torque. (5)  Hold flats on thermostat valve assembly with a wrench and connect tube assembly. CAUTION Do not exceed 150 inch-pounds torque when tightening tube assembly. c.  Adjustment.  Check controlling temperature and adjust if required as follows. (1)    Connect  gas  turbine  engine  analyzer  to power unit as described in paragraph 4-14b. 4-67