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FUEL TANKS, LINES, FILTERS, and PUMPS

FUEL TANKS, LINES, FILTERS, and PUMPS. CBC AUTOMOTIVE RK. OBJECTIVES. CBC AUTOMOTIVE RK. Describe fuel tank design & mounting. Describe a fuel tank filler and filler cap. Describe three types of fuel lines. Explain four types of fuel line fittings. Describe in-line fuel filter design.

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FUEL TANKS, LINES, FILTERS, and PUMPS

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  1. FUEL TANKS, LINES, FILTERS, and PUMPS CBC AUTOMOTIVE RK

  2. OBJECTIVES CBC AUTOMOTIVE RK • Describe fuel tank design & mounting. • Describe a fuel tank filler and filler cap. • Describe three types of fuel lines. • Explain four types of fuel line fittings. • Describe in-line fuel filter design. • Explain fuel filter mounting carb & EFI. • Explain fuel filter located in carb inlet nut.

  3. OBJECTIVES CBC AUTOMOTIVE RK • Explain the operation of a mechanical fuel pump during the intake stroke. • Explain the operation of a mechanical fuel pump during fuel discharge. • Explain how the fuel pressure is limited in a mechanical fuel pump. • Describe the operation of an electric fuel pump.

  4. INTRODUCTION CBC AUTOMOTIVE RK • Leaking fuel tanks create a very hazardous situation. • Filtering must be done without restricting flow. • Fuel system must provide adequate volume and pressure.

  5. FUEL TANKS CBC AUTOMOTIVE RK • Plastic or steel? • Retained with two straps. • Contains sending unit and pump.

  6. FUEL LINES and FITTINGS CBC AUTOMOTIVE RK • Three types of fuel lines: • Steel • Nylon • Reinforced Rubber • Four types of fuel fittings: • Pipe thread • Inverted Flare • Hose clamp • Captured O’ring or gasket

  7. FITTINGS CBC AUTOMOTIVE RK

  8. FUEL FILTERS CBC AUTOMOTIVE RK • Replace every 15,000 to 30,000 miles • Metal or plastic housing • Filter media • Pleated Paper • Plastic screen • Sintered Brass

  9. Mechanical in engine compartment. Electric under vehicle. FILTER LOCATION CBC AUTOMOTIVE RK

  10. MECHANICAL FUEL PUMPS CBC AUTOMOTIVE RK • Operates off eccentric on camshaft. • Return spring keeps fuel pump arm in contact with camshaft. • Two check valves • Inlet • Outlet • Diaphragm spring determines fuel pressure.

  11. FUEL PUMP OPERATION CBC AUTOMOTIVE RK

  12. ELECTRIC FUEL PUMPS CBC AUTOMOTIVE RK • Two types • Low pressure 10 to 15 PSI • High Pressure 30 to 45 PSI • Some up 60 PSI

  13. CIRCUITS CBC AUTOMOTIVE RK • Must have a way to keep fuel from draining from the vehicle in a rollover. • Oil pressure switch • Inertia switch • Computer • All use a relay

  14. DIAGRAM CBC AUTOMOTIVE RK

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