Service Manual

ISB, ISBe and QSB (Common Rail [...] Fuel Pump
Section 5 - Fuel System - Group 05 Page 5-29
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Prime
Automotive and Industrial
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.
CAUTION
Be sure that the fuel inlet and return valves are
returned to the open position before cranking the
engine. Engine damage can result if the valves are in
the wrong position when the engine is cranked or
started. Environmental damage can also occur.
CAUTION
Use caution when disconnecting or removing fuel
lines, replacing filters and priming the fuel system, so
that fuel is not spilled or drained. The fuel and fuel
filters must be discarded in accordance with local
environmental regulations.
Refer to Procedure 005-999 in the Familiarization section
for further information.
With Electric Lift Pump
Allow the lift pump to run by turning the ke switch ON and
waiting 30 seconds before starting.
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.
Operate the engine and check for leaks.
With Hand Priming Pump
Dry Fuel Filter and Fuel Tubes: this condition occurs if the
engine has come from the manufacturing plant without
being tested before shipping, if the fuel filters have been
changed. Before starting the engine, pump the hand
priming pump 120 times.
Full Fuel Filter and Fuel Tubes: This condition occurs if
the engine is being installed for the first time after being
built, but was tested at the manufacturing plant or is being
installed again. Before starting the engine, pump the hand
priming pump 40 times.
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.
Operate the engine and check for leaks.