Chassis Information --- Section 10
The Executive 2005
509
EGR FILTER (DETROIT ONLY)
The PuraGuard filter is used to remove oil from the air
supply for the EGR valve system. Oil in pneumatic valves
can cause the valves to operate sluggishly, or not at all.
Removing oil from the air supply for the EGR system helps
to ensure longevity of the valves. The filter should be
drained monthly and replaced annually. When perform-
ing maintenance, always dispose of drainage and filters prop-
erly.
CAUTION:
Discharge air system before removing filter.
LUBRICATION MAINTENANCE
Performing regular scheduled maintenance ensures reliable operation and optimum service life of
the various chassis components. Completed maintenance brings peace of mind knowing the various com-
ponents have received proper service. Failure to follow maintenance guidelines, or perform scheduled
maintenance, results in inefficient operation, premature component wear or component failure resulting in
breakdown.
Maintenance schedules are usually performed at certain mile or time intervals. When performing high
level procedures, lower level service should also be performed.
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.
EGR Filter located in the engine compartment.
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