TM 5-3810-207-20/TO 36C23-3-37-12 b.  Cleaning, Inspection, and Repair. (1) Clean    all    parts    with    an    approved    cleaning solvent and dry thoroughly. (2) Inspect  all  parts  for  dents,  fractures,  and  other damage. (3) Repair    or    replace    all    damnaged    parts    as necessary. Note If the filter cover is removed, for any reason, the gasket must be replaced. c.  Installation. (1) Install the oil filter as illustrated on figure 143. (2) Install the drain plug in the filter base. (3) Start the engine and check the filters for leaks. (4) Fill  crankcase  to  proper  operating  level  (LO  B- 381-207-20). (5) Install the engine access panel (par. 316). 242.  Engine Pressure Relief Valve The  pressure  relief  valve,  located  on  the  right side of the engine block, Is the same as the relief valve on    the    crane    engine    and    is    re    moved,    repaired, adjusted, and installed in the same manner (par.  115). Section III.  CARRIER FUEL SYSTEM 243.  General The   fuel   system   consists   of   a   78-gallon   tank mounted  on  the  left  side  of  the  carrier  frame;  a  fuel shutoff    valve    connected    to    the    tank;    a    fuel    line connected  to  the  diaphragm-type  fuel  pump,  mounted forward on the lower-left side of the block; a connecting fuel    line    leading    to    the    downdraft-type    carburetor, mounted on the right side of the engine; and an oil-bath type   air   cleaner,   mounted   behind   the   engine   on   the outside of the firewall, with a connecting hose from the air cleaner #to the rear of the carburetor.  A gear-driven governor is connected to the right side of the carburetor and    regulates    the    engine    speed    by    increasing    or decreasing   the   amount   of   fuel   mixture   entering   the cylinder.    This  governor  is  powered  by  a  cable  leading from the bottom of the governor to the lower end of the distributor shaft.  A fuel line leads from the fuel tank to the  primer  pump  on  the  dash  of  the  cab  with  a  line leading  directly  to  the  engine.    The  primer  is  for  cold- weather starting. 244.  Engine Air Cleaner a. Removal.  Remove the air cleaner as instructed on figure 144. b. Disas8embly.      Di-8emble   the   air   cleaner   as illustrated on figure 145. c. Cleaning, Inspection, and Repair. (1) Clean all parts with an approved cleaning solvent and dry thoroughly. (2) all parts for fractures and other damage. (3) Repair    or    replace    damaged    parts    as necessary. d. Reassembly.     Reassemble   the   air   cleaner   as illustrated on figure 145. e. Installation.  Install the air cleaner as illustrated on figure 144. 245.  Engine Governor a. Removal.    Remove  the  governor  as  instructed on figure 146. b. Cleaning, Inspection, and Repair. (1) Clean all parts with an approved cleaning solvent and dry thoroughly. (2) Inspect all parts for damaged or  defective condition. (3) Repair or replace all deranged or defective parts. c. Installation  and  Adjustment.    Install  and  adjust the   governor,   as   illustrated   on   figure   146,   so   engine operates at 1,650 rpm at full throttle. 246.  Carburetor a.  Removal. (1) Remove air cleaner hose and flange (par. 244). (2) Remove the engine speed governor (par. 245). (3) Remove  the  carburetor  as  instructed  on figure 147. 186