2 0 0 8 K n I G h t
chassIs InformatIon — 10
22
NOTE
Maintenance schedules are based on
normal operating conditions and use.
Operating under unusual or adverse
condition shortens service intervals.
NOTE
Engine and transmission service
intervals are listed in their respective
manuals.
Proper Lubricant Waste Disposal:
When performing service maintenance on
the engine, transmission or rear axle, waste
fluids and filters should be properly disposed of
or recycled. Package used oils, antifreeze and
other fluids in sealed containers. In many cases
used oil is accepted free of charge at county
disposal sites. Waste fluids are toxic to pets and
other animals. Waste fluids should not be left in
open containers. The sweet odor of antifreeze is
attractive to pets, but highly toxic.
CAUTION
Properly dispose of used antifreeze
and waste oil. Animals like the sweet
odor of antifreeze and may ingest it if
left in open containers. Wipe up any
fluid spills. Pets may lie in puddles of
fluid, many of which are irritants and
can cause severe chemical burns if not
properly washed.
Lubricant Classification:
Lubricants are manufactured in many forms
for a variety of applications. There are many
different oil and grease consistencies each
with a designed application. To properly select
a particular type of lubricant for a specific
application, the component must be evaluated.
Component stress loads, ambient temperature,
working temperature and environmental
exposure are just a few of the variables to
consider. Select the proper lubricant for its
intended application. As an example: selecting
high viscosity grease to lubricate a lock cylinder
results in sluggish lock cylinder operation
especially in a cool environment.
Conversely,
using graphite to lubricate a component that is
under extreme temperature and load will result
in component failure.
Grease ratings and their base compounds are
especially important when selecting a lubricant
type for an intended application. Some grease
compounds are manufactured for multi-use
application. These are acceptable if the grease
rating is in accordance with the manufacturer’s
recommended lubricant type and rating.
Lubricants:
Many chassis components require lubrication.
The types of lubricants used will vary with the
application of the component. A component
may fail prematurely due to lack of lubrication
or from using an incorrect lubricant type. The
component manufacturer usually recommends
a particular type of lubricant with a minimum
approval rating.
Most lubricants are tested under
strict guidelines set by the
ASTM (American
Society for Testing and Materials)
. The
NLGI
(National Lubricating Grease Institute)
helps
disperse information to the grease production
industry. Grease containers usually have
an approval rating by the
SAE (Society of
Automotive Engineers)
,
Mil Spec (Military
Specification)
,
API (American Petroleum
Institute)
or by other recognized and accepted
organizations.
The correct lubricant type with an approved
specific rating must be used whenever applying,
changing or adding any lubricant. When
purchasing lubricants for a specific application
be sure the label affirms the type of lubricant
required with the tested rating by the term
“meets or exceeds” in accordance with the
manufacturer specifications.
Lubricating greases are made from different
base compounds giving the grease different
lubricating consistencies, properties and
maximum operating temperatures. Most
containers list the base compound and maximum
operating temperature usually listed as melting
point or drip point. Lubricating components,
such as brake component for example, require
a high temperature special base compound
grease. Lubricating this type of component
with other than specified grease type will result
in inadequate lubricating qualities resulting in
component malfunction or failure.
INSPECTION
When performing any scheduled
maintenance, inspect the area around
where you are working. For example,
changing the oil, look at the rear
differential. Inspect for visual signs of
fluid leaks.
Most fluids and lubricants have a distinct
odor, which can be used to detect early signs of
trouble. Generally, odors are most detectable
soon after parking. Unusual sounds are another
method of detecting a problem early. There are
many types of sounds that are normal, such
as the cyclic purging of the air dryer. Become
familiar with the different sounds. If something
sounds odd, smells peculiar or looks unusual
investigate the situation.
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