Service Manual

ISB, ISBe and QSB (Common Rail [...] Engine Fuel Heater, Electric
Section 5 - Fuel System - Group 05 Page 5-7
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NOTE: To test the voltage to the fuel heater, use the Fuel
Heater Override test in INSITE™. Refer to INSITE™
documentation or Section 14 for more information.
Check for proper voltage to the fuel heater during the Fuel
Heater Override test.
Fuel Heater Voltage
12-volt system - 12 VDC
24-volt system - 24 VDC
If the voltage is not within specifications, refer to the OEM
troubleshooting and repair manual.
Remove
WARNING
Wear appropriate eye and face protection when using
compressed air. Flying debris and dirt can cause
personal injury.
WARNING
When using a steam cleaner, wear safety glasses or a
face shield, as well as protective clothing. Hot steam
can cause serious personal injury.
Steam-clean the fuel heater and the area around the
heater and fuel pump.
Dry with compressed air.
Disconnect the connector from the fuel heater.
Remove the fuel filter.
Remove the fuel filter spud.
Remove the fuel heater from the filter head. The heater
should be able to be pulled off the filter head.
Install
CAUTION
Make sure that no dirt or debris enters the fuel heater
to prevent the passing of contaminants to the high-
pressure fuel pump and injectors. Small amounts of
dirt and debris can cause a malfunction of these
components.
Place the fuel heater, gasket side facing up, against the
filter head.