Volvo D13F Service Manual

Volvo Trucks North America

Greensboro, NC USA

Fuel System, Design and Function

Date Group No. Page

D

1.2007 230 254 1(12)

Service Bulletin

Trucks

Fuel System

Design and Function

D13F

W2005843

This information covers the design and function of the fuel system on the Volvo D13F
engine.

Contents

“Fuel System” page 2

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Note: Information is subject to change without notice.
Illustrations are used for reference only and can differ slightly from the actual vehicle
being serviced. However, key components addressed in this information are
represented as accurately as possible.

PV776-20177414 USA23087.ihval

Volvo Trucks North America Date Group No. Page
Service Bulletin 1.2007 230 254 2(12)

Design and Function

Fuel System

When fault tracing, it is important to understand the function of the system in
order to avoid replacing non-defective components.

System Function

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W2005892

Volvo Trucks North America Date Group No. Page
Service Bulletin 1.2007 230 254 3(12)

Fuel is drawn up the fuel lines by the supply pump (1)
through the pickup tube in the fuel tank (2) in through the
Engine Electronic Control Unit (EECU) cooling coil (3),
and into the fuel filter housing (4). The fuel filter housing
is equipped with a pre-filter (5) and a water separator
(6), where fuel is filtered through the primary filter that
separates any water from the fuel.

The supply pump (1) forces the fuel into the fuel filter
housing through the main filter (7) to a cylinder head
longitudinal fuel gallery (8). This channel supplies each
unit injector (9) with pressurized fuel by a circular groove
around each unit injector in the cylinder head. The
overflow valve (10) controls the fuel supply pressure to
the unit injectors.

The return fuel from the overflow valve (10) is returned
back to the fuel filter housing and is mixed with the fuel
from the fueltank in achannel within the fuel filter housing
(4).

Supply Pump Valves

Two valves are located in the supply pump (1).
The safety valve (11) allows fuel to flow back to the

suction side when the pressure becomes too high, e.g., if
the fuel filter is blocked or is too restricted. The non-return
valve (12) opens when hand-priming is used.

D

Automatic Bleeding

If air gets into the system, it is bled when the engine
starts. During bleeding, the air is pressed out through the
fuel filter housing over to the fuel tank through the return
line (25). Bleeding for the filter replacement is controlled
by valves (17) and (23).

Water Drainage

Draining water from the water separator (5) requires the
following:

The sensor (14) in the water separator indicates water

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in the fuel bowl.
The engine is not running.

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The ignition key is in the ON position.

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The parking brake is applied.

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When the switch (15) is depressed (located in the cab
instrument panel), the drain valve (16) opens for about
15 seconds and drains the water. If additional drainage
is needed, wait 6 minutes before repeating because the
function is on a timer.

Manual Hand Pump

The manual hand pump (11) is located on the fuel filter
housing and is used to pump fuel (when the engine is not
running) after the fuel system has been drained for repair,
etc. The non-return valve(22) for the hand-priming pump
is also located in the fuel filter housing.

Volvo Trucks North America Date Group No. Page
Service Bulletin 1.2007 230 254 4(12)

Other

The fuel filter housing eliminates the need to drain the fuel
when replacing the filter. The valve pegs (17) and (21)
close when the fuel filter is removed. It is not necessary
to bleed the fuel system after replacing the filter, since
this is performed automatically when the engine is started
and runs for more than 2 minutes.

The plugged outlet (18) is fitted on the fuel filter housing.
The outlet is used when measuring supply pressure
after the fuel filter with an external pressure gauge. The
pressure sensor (19) on the fuel filter housing monitors
the supply pressure after the fuel filter. A fault code is
displayed on the instrument cluster if the fuel supply
pressure is less than the specified value.

A fuel heater (20) is available as an option. It is located
in the lower part of the water separator. The fuel tank
breather (24) prevents excessive vacuum in the fuel
tank(s) which could possibly result in fuel starvation.

Fuel System Components

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