Parts Requiring No Lubrication; Parts And Lubrication Recommendations; Tampering With Noise Control System Prohibited; Classification Of Lubricants - Dodge D250 1990 Service Manual

Lubrication and Maintenance
DODGE Turbo Diesel
Introduction
Page OA-3
- Tampering with Noise Control System Prohibited
Federal law prohibits the following acts or the causing thereof: (1) The removal or rendering inoperative by
any person other than for purposes of maintenance repair, or replacement of any device or element of
design incorporated into any new vehicle for the purpose of noise control prior to its sale or delivery to the
ultimate purchaser of while it is in use, (2) the use of the vehicle after such device or element of design has
been removed or rendered inoperative by any person.
- Classification of Lubricants
Oils, lubricants, and greases are classified and graded according to standards recommended by the
Society of Automotive Engineers (SAE), American Petroleum Institute (API) and National Lubricating
Greases Institute (NLGI).
- Engine Oil
The SAE grade number indicates the viscosity of engine oils. Engines oils are Identified by a dual number,
for example, SAE 15W-40, which indicates a multi-viscosity oil.
- Gear Lubricants
The SAE grade number also indicates the viscosity of Multipurpose Gear Lubricants. The API classification
system defines gear lubricants in terms of usage such as API GL-4 API GL-5 etc.
- Lubricants/Greases
Semisolid lubricants bear the NLGI designation and are further classified as grades 0,1,2,3 etc.
Parts Requiring No Lubrication
There are many points that should not be lubricated; some because they are permanently lubricated, some because
lubricants will be detrimental to their operating characteristics, and some because lubricants will cause component
failures. In particular rubber bushings should not be lubricated since this not only will cause them to fail, but will
destroy their necessary frictlonal characteristics. Parts that should not be lubricated are as follows:
Alternator Bearings Idler Arm Assembly Suspension Strut Bearing Water Pump Bearings
Drive Belts Rubber Bushings Throttle Control Cable
Fan Belt Idler Pulley Starter Bearings Throttle Linkage
Parts and Lubrication Recommendations
"Your Chrysler Motor vehicle has been engineered to perform for you for years to come. You will occasionally
require service and maintenance for your vehicle and Chrysler Motor recommends the use of "MOPAR" brand parts
and accessories. Each MOPAR part has been specifically designed to maintain top efficiency and quality by the
same team of engineers who designed your vehicle. Only MOPAR can make this claim. Remember, whenever your
Dodge requires a new part, always request the brand name MOPAR - it's worth the effort!
A Word About Maintenance
Preventative maintenance is the easiest and least expensive type of maintenance. Follow the maintenance schedule
recommendations outlined in Maintenance Guidelines.
Keep records of regularly scheduled maintenance.
Use the correct fuel, oil, and coolant in your engine as specified in Engine Specifications.