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Peterbilt 579 - Page 182

Peterbilt 579
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STARTING and OPERATING
4
Transmission
In cold
weather (below 32° F (0°
C), you may nd shifting sluggish
when you rst start up. Transmission
warm-up is especially important at
this time, but it is always a good
idea to warm-up your transmission
before starting out on the road. To
warm-up the transmission, follow these
procedures.
To
warm-up the transmission
lubricating oil during engine warm-up,
with a single transmission (manual and
automatic):
1. Put the
transmission in Neutral.
2. Release the
clutch pedal (manual
only) and operate the transmission
in neutral for 3 to 5 minutes prior
to operating the transmission in
either forward or reverse range.
3. If you
have a two-transmission
combination:
a. Put the
main transmission in
gear.
b. Put the
auxiliary transmission
in Neutral. This will allow
the transmission countershaft
to turn, agitating the oil and
warming it.
4-10 Y53-6047–2C (04/13)

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