Service Manual

ISB, ISBe and QSB (Common Rail [...] Fuel Pressure Relief Valve
Section 6 - Injectors and Fuel Lines - Group 06 Page 6-101
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WARNING
Batteries can emit explosive gases. To reduce the
possibility of personal injury, always ventilate the
compartment before servicing the batteries. To
reduce the possibility of arcing, remove the negative
(-) battery cable first and attach the negative (-)
battery cable last.
Connect the batteries.
Prime
WARNING
The fuel pump high-pressure fuel lines and fuel rail
contain very high-pressure fuel. Never loosen any
fittings while the engine is running. Personal injury
and property damage can result.
WARNING
Be sure that the fuel inlet and return valves are
returned to the open position before cranking engine.
Engine damage can result if valves are in the wrong
position when engine is cranked or started.
Environmental damage can also occur. Refer to
Procedure Procedure 005-999 (Fuel System Overview)
in Familiarization section for further information.
On marine application engines, open fuel supply and
return valves.
NOTE: It is not necessary to vent air from the high-
pressure fuel system before starting the engine. Cranking
the engine will prime the fuel system.
For engines with an electric lift pump, allow the lift pump
to run by turning the keyswitch ON and waiting 30
seconds before starting.
Operate the engine and check the pressure relief valve
and fuel line for leaks.