TM 55-4920-328-13 Section II.  SYSTEM CHECKOUT AND CRANE OPERATION 2-9.  Preliminary Checkout Prior to Test. To  ensure  the  integrity  of  the  system,  accomplish the  following  procedures  prior  to  test  of  an  engine.    The METS   must   be   calibrated   in      accordance      with      TB 554920328-50  before  engine testing begins.  Proceed as follows: NOTE The  engine  to  be  tested  must  be  completely connected to the test system prior to accomplishing the following procedures. a.    Check  to  ensure  that  all  support  systems  have  been serviced as specified in paragraph 2-6. b.        Check    to    ensure    that    the    engine    accessories installation is complete and correct. c.    When  included  in  the  applicable  engine  accessories, install  the  engine  performance  panel  on  the  front  of  the vertical tape indicator assembly (9, figure 1-22.) d.  Inspect the dirt indicator of the filter (5, figure 1-16) for evidence of clogging.  If required, remove and clean the filter prior to operation of the system. CAUTION Failure to observe the precautions out- lined In  the  following  step  will  result  In  extreme damage to the engine under test. e.    When  testing  an  engine  other  than  a  T55,  T73,  or IT700,  position  the  manual  selector  valve  (10,  figure  1- 12)  in  the  lest  trailer  oil  system  to  the  T53,  T63,  or  T74 position, as applicable. NOTE The  design  of  the  METS  electrical  system permits  the  use  of  an  alternate  source  of external power. Disconnect cable assemblies W28 andW29 from the respective connectors  J3  and  J2  on  the  control  cab module.      Disconnect   the   leads   from   the generator set from terminals TB1, TB2, TB3, and  TB4  in  the  auxilairy  trailer  distribution box.      Connect   a   source   of   208-volt,   300- ampere,     3-phase,     4-wire     power     to     the terminal boards, using figure 5-2 as a guide. NOTE It  is  recommended  that  a  fire  extinguisher conforming   to   local   safety   regulations   be obtained and mounted on the wall inside the control cab. NOTE Assure the MAIN circuit breaker, (8, figure 2-9) is off. f.  Accomplish the prestart checkout of the generator set as outlined in TM 55-6115-425-12. g.  Check to ensure the frequency selector switch on the generator set is positioned to 60 cycles. h.  Check to ensure that the DC CONTROL circuit breaker on the generator set is in the energized position. i.  For starting the generator set at or above temperatures of +250 F, proceed as follows: (1)    Position  the  ENGINE  START/RUN  switch(35,  figure 2-8) on the generator control panel to RUN. (2)    Actuate  the  TEST  OR  RESET  switch  (23)  on  the generator  set  fault  indicator  panel  to  the  TEST  position. Observe  that  all  fault  indicator  lights  on  the  panel  come on. (3)    Deenergize  the  TEST  OR  RESET  switch  (23).    All lights except (13,20) on the fault indicator panel must go off. (4)      Position   the   ENGINE   START/RUN   switch   (35)   to START.  Leave the switch in this position until the engine starts  and  the  oil  pressure  gage  (39)  indicates  20  psig minimum.      At   this   time,   position   the   switch   to   RUN. Check  to  ensure  that  the  generator  output  voltage  and frequency are within normal operating limits.  If the under voltage  fault  indicator  light  (20)  remains  on,  depress  the TEST OR RESET switch (23), momentarily. j.  For starting the generator set at temperatures between -250F and +250F, proceed as follows: 2-44    Change 3