Medium Duty Operator's Manual - Peterbilt Motors Company

Preventive Maintenance
Lubrication Specifications
You will find a complete Engine Lubrication Service Guide in
the Engine Operation and Maintenance Manual. There, the
engine manufacturer explains more fully all the maintenance
operations you and a qualified service mechanic will need.
And please remember: one key to keeping your Medium Duty
running at top economy and in prolonging its life is proper
lubrication servicing. Neglecting this essential aspect of vehicle
care can cost time and money in the long run.
Maintenance Schedule and Lubrication
Below you will find basic information needed to perform routine
vehicle lubrication. Of course you will want to schedule
service more frequently if you are operating under severe
conditions such as extreme heat or cold, with very heavy
loads, rough roads, etc. For any special service requirements,
consult your service manuals and your lubricant supplier.
The component manufacturer's specification and
requirements take precedence over other specifications.
WARNING! Handle lubricants carefully. Vehicle
lubricants (oil and grease) can be poisonous
and cause sickness. They can also damage the
paint on the vehicle.
CAUTION: Do not mix different types of lubricants.
Mixing lubricants (oil and grease) of different
brands or types could damage vehicle
components; therefore, drain (or remove) old
lubricants from the unit before refilling it.
• When switching between types of lubricants, thoroughly
drain all areas of the component.
Medium Duty (R05/09) Y53-6008A – 163 –