1. UH-60A/L Fuel System

2. Components Main Fuel Cell (2x) Fuel Lines Fuel Selectors
Fuel Cell Boost Pump (2x)
Prime Boost Pump
30 Micron Fuel Filter (2x)
Engine Driven Fuel Pump (2x)
Hydromechanical Unit (2x)
POU/ODV
Oil Cooler (2x)

3. Fuel Cell
181 Gallon Capacity Ballistic Tolerant Self-Sealing Rubber Compound W/Nylon Filament
High-Level Shut-Off Valve
Low-Level Shut-Off Valve
Pressure Refuel/de-fuel Valve
Fuel Quantity & Low Level Sensor
Cell Vents

4. Fuel Lines
The fuel lines are self-sealing, and have self-sealing, breakaway-type valves. These prevent the loss of fuel in the event of a crash or if the lines are severed.
Check valves to prevent loss of engine prime.
Fuel selector valves.

5. Fuel Selectors Two fuel selectors in the engine control quadrant
Connected by low friction push-pull cables
Off, dir(direct), XFD (cross-feed) positions
Fuel from no. 1 tank to no. 1 engine
Fuel from no. 2 tank to no. 2 engine
Fuel from either tank to supply both engines
Fuel from either tank to supply opposite engine.

6. Fuel Boost Pump Electrically-operated submerged
Provide pressurized fuel to the engine fuel inlet port
Two position switch
Pressure activated pump-on advisory light(25 psi)
Check valve to prevent loss of engine prime

7. Prime Boost Pump
Located in front of the no 1 fuel cell component plate.
Controlled by the PRIME BOOST PUMP switch on the upper console.
5 psi rated output.

8. Fuel Filter 30 micron replaceable filter
Impending bypass indicator (LRB)

9. Engine Driven Boost Pump
Mounted on the Engine Accessory Module.
Negative (suction) 6-8 psi.
Positive psi output.

10. Hydromechanical Unit Main Fuel Control Device.
Mounted on the rear of the engine accessory gear box.
Contains high pressure (832 psi) pump to deliver fuel to POU/ODV.
Also controls Inlet Guide Vanes and engine Anti-Ice/Start Bleed Valve

11. POU ODV On the left aft side of the engine accessory module
Fuel to primer nozzles and main fuel injectors for engine start and operation
Purges fuel from primer nozzles
Drains main fuel manifold
Reduces fuel flow to prevent engine overspeed
ODV
The ODV replaces the POU with the same functions, in addion:
Sends fuel through the main fuel manifold to the injectors
Shuts off fuel flow to prevent an overspeed condition
Shuts off fuel to prevent a hot start
Purges fuel injectors on shutdown

12. Oil Cooler
The Oil Cooler is a heat exchange unit that cools engine oil and pre-heats the fuel for better atomization the ensure proper ignition and burn.

13. L Model Hot Start Prevention Np Overspeed Protection System
Fuel Burn Rates

14. Summary
Components
A Model/ L Model differences

15. Questions?