Shifting Gears in a New Vehicle
PART 7: STARTING & OPERATING THE VEHICLE
CAUTION: Do not allow your engine to idle, at
low rpm’s (400–600 rpm), longer than
fi
ve min-
utes. Long periods of idling after the engine has
reached operating temperatures can decrease
engine temperature and cause gummed piston
rings, clogged injectors, and possible engine
damage from lack of lubrication. The normal
torsional vibrations generated can also cause
transmission wear.
During the time it takes you to drink a cup of coffee, your
engine can cool as much as 60° F (33° C) below normal
operating temperature. To keep the engine warm during a
short break, turn it off. And don’t allow your engine to idle
longer than
fi
ve minutes.
Putting The Vehicle In Motion
This section discusses the clutch and transmission opera-
tion to get your Peterbilt underway.
WARNING! Do not carry loose objects in your
cab, it can be dangerous. In a sudden stop, or
even going over a bump in the road, they could
fl
y through the air and strike you or a passen-
ger. You could be injured or even killed. Secure
all loose objects in the cab before moving the
vehicle.
Shifting The Transmission
You will
fi
nd a shift pattern either on a decal in your cab or
on a medallion in the shift knob. Check to be sure you know
the correct sequence for your particular transmission. Re-
fer to the transmission manual included with your vehicle
for complete instructions in the operation of your transmis-
sion.
Shifting Gears in a New Vehicle
Shift carefully in a new vehicle. The transmission may be a
little stiff at
fi
rst. So be careful to avoid gear clashing. When
you are operating a new vehicle or one that has been ex-
posed to cold weather, you want the transmission lubricant
to circulate and coat the contacting surfaces of the gears.
Metal contacting metal in moving parts may seriously dam-
age your transmission. So don’t drive in one gear for long
until the transmission lubricant has had a chance to coat
those contacting surfaces.
– 78 –
Y53-6015
R(08/07)
Summary of Contents for Peterbilt 320
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Page 210: ...PART 11 SUBJECT INDEX Windshield Washer Reservoir 29 206 Y53 6015 R 08 07 ...
Page 212: ...Peterbilt Motors Company P O Box 90208 Denton Texas 76202 ...