TM  5-4930-227-14 CHAPTER 1 INTRODUCTION Section I. GENERAL 1-1. Scope 1-2. Forms and Records a. These instructions are published for the use of the personnel maintaining the Tank and Pump Unit, Model 2000, as allocated by the Mainte- nance Allocation Chart. It provides information on operator, organizational, direct support, and general support maintenance of the equipment, its accessories, and auxiliaries. The organization- al,  direct  and  general  support  maintenance  repair parts  and  special  tool  list  are  in  TM  5-4930- 227–24P. a. DA  forms  and  records  used  for  equipimemt maintance will be only those prescribed in TM 38-750. b. Report  of  errors,  omissions,  and  recommen- dations  for  improving  this  publication  by  the individual  user  is  encouraged.  Reports  should  be submitted  on  DA  Form  2028  (Recommended Changes to DA Publications) and forwarded di- rect to the Commanding General, U.S. Army Mo- bility  Equipment  Command,  ATTN:  AMSME- MPP,  4300  Goodfellow  Boulevard,  St.  Louis,  Mo. b. Number  in  parentheses  on  illustrations  in- 63120. dicate  the  quantity.  Numbers  preceding  nomen- 1-3. Administrative Storage clature  callouts  on  illustrations  indicate  the  pre- Refer to TM 740-90-1, administrative storage of ferred  maintenance  sequence. equipment. Section Il. DESCRIPTION AND DATA 1-4. Description a. General. The Tank and Pump Unit, Model 2000, consists of a 50 gpm (gallons per minute) pumping  assembly  (fig.  1-1),  two  600-gallon tanks  (FSN  5430-58-2529)  and  related  items. It is designed for use with 2 1/2 ton, 6X6 cargo truck M-34, M-35 and M-211, and with 5 ton, 6X6 cargo trucks M-41 and M-54. When install- ed in a cargo truck, the tank and pump unit is used in the field as a bulk carrier and dispenser. It  carries  1,200  gallons.  The  purpose  of  the  tank and pump unit is to convert a general purpose military  cargo  vehicle  into  a  bulk  refueler  for other  military  vehicles  or  aircraft. b.  Pumping  Assembly.  The  pumping  assembly of  the  Tank  and  Pump  Unit,  Model  2000,  in- cludes the pump, engine, filter/separator, reels and  other  related  items  of  equipment  (fig.  1-2 and  1-3). c.  Pump.  The   pump   (fig.   1-4)   is   a   self- priming unit, with the impeller screwed on the extension  of  the  engine  crankshaft.  The  pump  is coupled  to  the  engine  by  an  intermediate  coupling and seal. Both pump and engine are mounted on a  base  plate  to  facilitate  removal  and  use  in auxiliary  pumping  operations  (para  2-11d). d.  Engine.  The  engine  (fig.  1-2)  is  a  one- cylinder, 4-cycle, air-cooled, hand-cranked, Wisconsin Gasoline Engine, Model MBKND. A radio-shielded  magneto  supplies  the  ignition spark, and a governor controls the engine speeds by  varying  throttle  openings  to  suit  pump  loads. A  gasoline  tank  of  one  gallon  capacity  is  pro- vided. e. Filter/Separator.  The  filter/separator  (fig. 1-3) is a vertical, 50 gpm unit designed for maxi- mum operating pressure of 40 psi (pounds per square inch). Both solids and water (free from entrained  water)  are  removed  from  the  fuel through coalescing and filtering media of the ele- ments  inside  the  filter/separator.  The  filter/sep- arator has four canisters and filter elements, two pressure gages, sight glass, and two drains. Solid contaminants  are  deposited  in  the  elements.  The emulsified  or  entrained  water  coalesces  within  the elements and settles to the deck plate where it is  removed,  periodically,  through  the  upper  drain, as  free  water.  Clean  product  builds  up  in  the shell, and is pumped to the hose reels. Refer to figure 1-5 for the flow of the pumped product. 1-1