freightliner COLUMBIA CL112 Maintenance Manual page 174

83
1
11/21/95
1. Moisture Indicator
Fig. 2, Receiver-Drier
83–02 Air Filter Replacement
Cab Fresh Air Filter
Replacement, Blend Air
If the vehicle is equipped with a cab fresh air filter, it
must be replaced every six months regardless of
mileage to permit proper operation of the HVAC
system.
CAUTION
If equipped with a fresh air filter, it should be re-
placed every six months. If the fresh air filter is
not replaced every six months, damage to the
heater and air conditioner components could
occur.
IMPORTANT: When replacing the air filter, use
only a Freightliner-approved air filter.
83/2
1. Park the vehicle on a level surface. Apply the
parking brakes and chock the rear tires.
2. Lift the wire retainer on the air filter cover up and
over the upper edge of the cover and pull the
wire retainer down. See
2
1
02/26/2002
1. Air Filter Cover
f830746
3. Note the direction of the arrow on the air filter
cover, then remove the cover and the attached
filter.
4. Remove the air filter from the air filter cover. Dis-
card the air filter.
5. Attach a new air filter to the air filter cover. Make
sure the arrow on the filter is pointing in the
same direction as the arrow on the cover.
6. Install the air filter and air filter cover in the
HVAC air intake plenum.
7. Pull the wire retainer up and over the upper edge
of the air filter cover.
8. Remove the chocks from the tires.
Cab Recirculation Air Filter
Replacement, Blend Air
The cab recirculation air filter must be replaced every
six months, regardless of mileage, to permit proper
operation of the HVAC system.
Heater and Air Conditioner
Fig. 3.
2. Wire Retainer
Fig. 3, HVAC Air Intake Plenum
Columbia Maintenance Manual, September 2015
f831493