wsm L3301 Workshop Manual page 144

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L3301, L3901, L4701, WSM

The separator has a function of separating fuel and

water through difference in specific gravity. There is a

read float (7) with a specific weight of 0.9 made of a

polypropylene material inside that has properties in that

it is heavier than diesel and lighter than water.

When fuel containing water enters the separator,

water with a high specific weight pools in the bottom of a

cup (2) and causes the float to float. The state of mixing

in of water can be recognized by the state of the float and

can be visually inspected externally.

Fuel with a low specific weight flows over the top of

the cup but passes through the element (5) provided

inside enabling filth to be removed from the fuel.

(1) Fuel Valve

(3) Retainer Ring

The fuel cooler (1) is set downstream of the

separator and is used to cool the fuel.

When the pressure of fuel is increased, the

temperature also rises. The fuel in the common rail

system is raised to high pressure so the fuel temperature

also rises. If the fuel temperature rises too much, output

and durability are reduced. A fuel cooler that suppresses

fuel temperature rise is provided to prevent this.

(1) Fuel Cooler

(7) Red Float

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KiSC issued 09, 2016 A

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