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Figure  6-20.-Fuel-service  truck.
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Equipment Operator Basic - Beginning construction equipment operators manual
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Figure  6-21.—Fuel-service  truck  diagram. CAUTION Allowing   the   engine   to   run   with   the transmission engaged and the transfer case shift lever in NEUTRAL without the PTO in the ENGAGE position will cause bearing failure in the  transfer  case. Be  sure  to  shift  the transmission  gearshift  lever  to  NEUTRAL when not operating the power takeoff. After the fuel dispensing pump is engaged set the throttle  rpm  to  the  manufacturer’s  recommended setting. Move the discharge valve control levers to the open position; and be sure, before pumping operations begin, to attach the grounding wire to the vehicle being serviced. Open the pump delivery line hose and squeeze the nozzle operating lever to discharge the fuel. After discharging the fuel, close the pump delivery line  gate  valve,  and  move  the  discharge  valve  control operating  lever  to  the  CLOSED  position.TIhen  close  the automatic dump valve drain tube valve. Return to the driver’s compartment; set the rpms to idle, depress the clutch and place the transmission gearshift lever in NEUTRAL;  then  place  the  transfer  power  takeoff shifting lever to DISENGAGED, and stop the engine. When changing from one type of fuel to another, drain   and   flush   the   fuel   compartments,   pump filter/separator,  service  lines,  manifold,  meter,  gauge, and  dispensing  hoses  and  nozzles. NOTE:  All   pumping   mechanisms   are   not controlled and operated in the same manner. Each make or model operates differently. If you are in doubt as to the proper pump operation and maintenance procedures, study  the  operator’s  manual  and  the  caution  and instruction  plates  located  near  the  pump  and  control mechanisms. Fuel Safety Drivers of fuel tank trucks must observe safe driving practices, some of which are listed below. l Drive defensively and make allowances for other drivers. . Make turns only intent  to  other  drivers. from  proper  lanes,  and  signal Never leave the proper lane 6-27







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