Perkins 1206A-E70TTA Operation And Maintenance Manual page 17

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Illustration 15
(1) High-pressure line
(2) High-pressure line
(3) High-pressure line
The high-pressure fuel lines are the fuel lines that are
between the high-pressure fuel pump and the high-
pressure fuel manifold and the fuel lines that are
between the fuel manifold and cylinder head. These
fuel lines are different from fuel lines on other fuel
systems.
This different is because of the following items:
• The high-pressure fuel lines are constantly
charged with high pressure.
• The internal pressures of the high-pressure fuel
lines are higher than other types of fuel system.
• The high-pressure fuel lines are formed to shape
and then strengthened by a special process.
Do not step on the high-pressure fuel lines. Do not
deflect the high-pressure fuel lines. Do not bend or
strike the high-pressure fuel lines. Deformation or
damage of the high-pressure fuel lines may cause a
point of weakness and potential failure.
Do not check the high-pressure fuel lines with the
engine or the starting motor in operation. After the
engine has stopped, you must wait for 10 minutes in
order to allow the fuel pressure to be purged from the
high-pressure fuel lines before any service or repair
is performed on the engine fuel lines. The 10 minute
wait will also allow static charge to dissipate from the
low-pressure fuel system.
Do not loosen the high-pressure fuel lines in order to
remove air from the fuel system. This procedure is
not required.
(4) High-pressure line
(5) High-pressure line
(6) High-pressure line
Visually inspect the high-pressure fuel lines before
the engine is started. This inspection should be each
day.
If you inspect the engine in operation, always use the
proper inspection procedure in order to avoid a fluid
penetration hazard. Refer to Operation and
Maintenance Manual, "General hazard Information".
• Inspect the high-pressure fuel lines for damage,
deformation, a nick, a cut, a crease, or a dent.
• Do not operate the engine with a fuel leak. If there
is a leak do not tighten the connection, in order to
stop the leak. The connection must only be
tightened to the recommended torque. Refer to
Disassembly and Assembly, "Fuel injection lines -
Remove and Fuel injection lines - Install".
• If the high-pressure fuel lines are torqued correctly
and the high-pressure fuel lines are leaking, the
high-pressure fuel lines must be replaced.
• Ensure that all clips on the high-pressure fuel lines
are in place. Do not operate the engine with clips
that are damaged, missing, or loose.
• Do not attach any other item to the high-pressure
fuel lines.
• Loosened high-pressure fuel lines must be
replaced. Also removed high-pressure fuel lines
must be replaced. Refer to Disassembly and
assembly manual, " Fuel Injection Lines - Install".
Safety Section
High Pressure Fuel Lines
(7) High-pressure fuel manifold (rail)
(8) High-pressure line
(9) Fuel transfer line that is high pressure
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