Peterbilt 579 Operator's Manual page 247

Off highway is defined for applications
where the vehicle may be driven off
the pavement on a regular basis, even
if it is an infrequent basis and/or for a
brief time period.
Please contact an authorized
service dealership if there are
questions regarding which interval
to follow. Consult the supplier for
specific recommendations where
discrepancies develop between these
recommendations in this table and
component supplier recommendations.
•
Engine lubricating oil change
intervals aren't listed here. Refer
to your engine's operating manual
for recommendations. For specific
information on maintenance
procedures consult your vehicle
maintenance manual.
•
The initial fill of drive axle lubricant
must be changed before the end
of the first scheduled maintenance
(04/13)
PREVENTIVE MAINTENANCE SCHEDULE
interval. Refer to Oil Changes on
page 5-43 before you put a new
vehicle into service.
•
The initial fill of lubricant in
manual transmissions must be
changed before the end of the first
maintenance interval. See Fuller
Transmission Lubrication on page
5-40 for specific information.
•
If your vehicle is equipped with an
automatic transmission, consult
the owner's manual for it that came
with your vehicle to obtain lubricant
check and change intervals.
Y53-6047–2C
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5-11