Heating and Air Conditioning
187
Cab Air Filters
Air going into the cab passes a filter lo-
cated on the right, front side of the cab.
Remove the filter and clean with an air gun
(no more than 20 psi pressure) after 40,000
miles (64,000 km), (in dusty conditions as
often as every 10,000 miles [16,000 km]).
Make sure the air stream is directed from
the inside out.
The filter should not be cleaned and reused
more than once. Replace with a new filter
after maximum 70,000 miles (110,000 km),
or earlier if driving in dusty conditions. A
clogged filter decreases the efficiency of the
air conditioning system.
W8002474
If the vehicle is equipped with a sleeper
heater-A/C, there is a filter for the recircu-
lating air. This is located behind the
passenger seat on the bunk support. The fil-
ter should be checked and cleaned after
40,000 miles (64,000 km), (in dusty condi-
tions as often as every 10,000 miles [16,000
km]). Clean as the cab air filter. Replace
filter after 100,000 miles (160,000 km).
To inspect or to change the filter, open lug-
gage storage lid and pull out filter.
W8002473
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