Operation and maintenance manual

Normal Starting Procedure QSB4.5 and QSB6.7
Page 1-2 Section 1 - Operating Instructions
WARNING
Do not operate a diesel engine where there are or can
BE COMBUSTIBLE vapors. These vapors can be
sucked through the air intake system and cause
engine acceleration and over speeding that can result
in a fire, an explosion, and extensive property
damage. Numerous safety devices are available, such
as air intake shutoff devices, to minimize the risk of
over speeding where an engine, due to its application,
is operating in a combustible environment, such as
due to a fuel spill or gas leak. Remember, Cummins
Inc. has no way of knowing the use you have for your
engine. The equipment owner and operator ARE
responsible for safe operation in a hostile
environment. Consult A Cummins® Authorized Repair
Location for further information.
CAUTION
Do not expose the engine to corrosive chemicals.
Corrosive chemicals can damage the engine.
Cummins recommends the installation of an air intake
shutoff device or a similar safety device to minimize the
risk of overspeeding when an engine is operating in a
combustible environment, such as due to a fuel spill or
gas leak.
Normal Starting Procedure
General Information
WARNING
Do not depress the accelerator pedal or move the
accelerator lever from the idle position while cranking
the engine. This can result in engine overspeed and
severe damage to the engine.
CAUTION
To prevent damage to the starting motor, do not
engage the starting motor for more than 30 seconds.
Wait 2 minutes between each attempt to start
(electrical starting motors only).
NOTE: Engines equipped with air starting motors require
a minimum of 480 kPa [70 psi].
• Disengage the driven unit, or if equipped, put the
transmission in neutral.
• With the accelerator pedal or lever in the idle position,
turn the key switch to the ON position, and wait for the
WAIT-TO-START lamp to go out; then, turn the key to
the START position.
• If the engine does not start after three attempts, check
the fuel supply system. Absence of blue or white
exhaust smoke during cranking indicates no fuel is
being delivered.