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SUBJECT
DATE
Removal of the Hydrocarbon Doser Block
December 2012
Additions, Revisions, or Updates
Publication Number / Title
DDC-SVC-MAN-0083
Platform
Section Title
Change
DD Platform
Removal of the
Hydrocarbon Doser
Block
Removed step directing techs to remove the fuel line from the
manifold on the high pressure pump when removing the doser
block.
All information subject to change without notice.
11 04-12 Copyright © 2013 DETROIT DIESEL CORPORATION
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2 Removal of the Hydrocarbon Doser Block
2
Removal of the Hydrocarbon Doser Block
Remove as follows:
WARNING: PERSONAL INJURY
To avoid injury, never remove any engine component while the engine is running.
WARNING: PERSONAL INJURY
To prevent the escape of high pressure fuel that can penetrate skin, ensure the engine has been
shut down for a minimum of 10 minutes before servicing any component within the high pressure
circuit. Residual high fuel pressure may be present within the circuit.
NOTICE: Removal/installation of the Hydrocarbon doser block assembly will require that the system be purged to
remove all air in the fuel lines. Refer to DDDL 7.X to perform this routine service.
NOTE: Always disconnect the fuel lines prior to disconnecting the electrical connectors to avoid fuel
contamination into the sensors and connectors.
1.
2.
3.
4.
Shut off engine, apply the parking brake and chock the wheels.
Place a drip pan under the engine to collect any fuel.
Disconnect the air compressor inlet hose from the Hydrocarbon (HC) doser block bracket (if required).
Disconnect the inlet and outlet fuel lines (1, 2) from the HC doser block assembly.
5. Unplug the connectors from Fuel Cutoff Valve (FCV) (1), Fuel Line Pressure Sensor (FLP) (3), Fuel Compensation
Pressure Sensor (FCP) (2), and Electronic Dosing Valve (EDV) (4).
4
All information subject to change without notice.
Copyright © 2013 DETROIT DIESEL CORPORATION 11 04-12
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6. Loosen three bolts (3) and remove the HC doser block assembly (2) from the HC doser block bracket (1).
a. Figure below shows the EPA10 Doser Block.
b. Figure below shows the GHG14 DD15 AT Doser Block configuration.
All information subject to change without notice.
11 04-12 Copyright © 2013 DETROIT DIESEL CORPORATION
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2 Removal of the Hydrocarbon Doser Block
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All information subject to change without notice.
Copyright © 2013 DETROIT DIESEL CORPORATION 11 04-12
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