Peterbilt 325 2017, Operator'S Manual, Page: 272 / 392

AIR SYSTEM
Preventive Maintenance
The following service checks are
provided for your information only and
should be performed by a certified
mechanic. Contact your dealer or the
engine manufacturer's Maintenance
Manual for further information on
servicing air compressors.
After completing any repairs to the air
system, always test for air leaks, and
check the brakes for safe operation
before putting the vehicle in service.
Below is a list of areas to maintain for
the air compressor:
•
Inspect compressor air filter
element, if so equipped, and
replace element if clogged. Check
compressor mounting and drive
for alignment and belt tension.
Adjust if necessary.
•
Remove compressor discharge
valve cap nuts and check for
presence of excessive carbon. If
excessive carbon is found, clean
or replace the compressor cylinder
head. Also, check compressor
discharge line for carbon, and
clean or replace the discharge line
if necessary.
•
Disassemble compressor and
thoroughly clean and inspect
all parts. Repair or replace
all worn or damaged parts, or
replace compressor with a factory
exchange unit.
CAUTION
When draining the engine cooling
system is required, to prevent dam-
age from freezing, the compressor
must also be drained at the cylinder
head and block.
Engine damage
could occur if the cooling system is
not periodically drained and main-
tained. See Cooling System on page
5-80 for further information.
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Y53-6060-1C1 (03/17)
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