TM 55-4920-328-13 percent   of   NI   speed   and   energize   the   TIMER   START switchlight    unit    (35).        During    coastdown,    listen    for evidence of rubs, excessive or unusual noise, or evidence of vibration in the engine.  Do not proceed with the test of an engine if any of the foregoing adverse conditions exist. f.      If   a   test   of   a   T63   engine   is   to   be   accomplished, energize the OIL PRE-HEAT ON switch (14, figure 1-26) and  allow  the  oil  to  heat  to  1800  F  prior  to  firing  the engine. g.        Shut    down    the    system    in    accordance    with    the procedures outlined in paragraph 2-12. 2-12.  Electrical System Shutdown Procedures. After    the    prior    to    engine    firing    checkout    has    been accomplished, deenergize the system in accordance with the following: a.    Reset  the  elapsed  time  indicator  (37,  figure  1-24)  by depressing the TIMER RESET switchlight unit (36). b.    Position  the  AIR  SUPPLY  switch  (9,  figure  1-  27)  to OFF, if energized. c.  Deenergize the following switches on the No. 1 power control panel (32, figure 1-26): BEACON OFF (20) FLOOD LIGHTS OFF (21) FUEL PUMP STOP (22) OIL PUMP STOP (23) (if applicable) OIL PRE-HEAT OFF (24) (if applicable) LUBE PUMP STOP (25) (if applicable) AIR COMP STOP (26) TOWER FAN NO.  2 STOP (27) TOWER FAN NO.  1 STOP (28) COOLING PUMP STOP (29) BRAKE PUMP STOP (30) d.  Deenergize the following switchlight units on services panel 4A1 (9) as shown in figure 1-25: ENGINE DC (27) 115 VAC 400 HZ (28) INST DC (29) CONSOLE DC (30) 26 VAC 400 HZ (31) e.  Deenergize the INST PWR OFF switch (31, figure 1- 26) on the No.  1 power control panel (32). f.  Deenergize (open) the following circuit breakers in the control cab circuit breaker panel assembly (1, figure 2-9): NOTE The   UTIL   OUTLETS/LTG   circuit   breaker   CB9 (11)   may   remain   energized   at   all   times   for operator  convenience,  except  for  maintenance actions. LUBE PUMP CB6 (2) (if applicable) BEACON/SPARE CB4 (3) FUEL PUMP CB2 (4) INST POWER CB8 (7) AIR CONDITIONER CB10 (6) OIL PRE-HEAT CB12 (5) (if applicable) TRICKLE CHARGER CB13 (9) MOTOR STARTER CONTROL CB 11 (10) FLOOD LIGHT/BLOWER CB7 (12) INST POWER SUPPLY CB5 (13) OIL PUMP CB3 (14) (if applicable) AIR COMPRESSOR CB1 (15) CAUTION Ensure     that     the     electrical     load     is     always removed     from     the     generator     set     prior     to deenergizing the MAIN circuit breaker (8, figure 2- 9).  Failure to observe this pre- caution may result in damage to the equipment. g.  Deenergize the MAIN circuit breaker (8) on the control cab circuit breaker panel assembly. h.      Deenergize   the   generator   set   by   positioning   the START/RUN switch (35, figure 2-8) to STOP. 2-13.  Operation of Crane Assembly. Operate   the   crane   assembly   in   accordance   with   the following: a.    Remove  the  nut  (11,  figure  1-5)  and  cap  screw  (12) from the lifting end of the boom extension (2). b.      Slide   the   boom   extension   (2)   out   from   the   fully retracted   position   until   the   second   hole   in   the   boom extension  is  aligned  with  the  mating  hole  in  the  boom. Reinstall the capscrew and nut. c.  Attach the chain block (9, figure 1-3) to the chain and hook assembly (1, figure 1-5). d.  To raise the boom (3) , close the manual re- lease valve (10) by turning the handle clockwise, then operate the hydraulic hand pump (5).  For slower lifting speed and less pumping, open the release valve 1/4 to 1/2 turn before operating the hydraulic hand pump. Change 2    2-54