freightliner COLUMBIA CL112 Maintenance Manual page 121

83
1
11/21/95
1. Moisture Indicator
Fig. 2, Receiver-Drier
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.
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
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.
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Fig. 3.
Heater and Air Conditioner
2
1
02/26/2002
1. Air Filter Cover
Fig. 3, HVAC Air Intake Plenum
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.
CAUTION
If the recirculation air filter is not replaced every
six months, damage to the heater and air condi-
tioner components could occur. The HVAC system
should not be operated without the recirculation
air filter installed.
IMPORTANT: When replacing the air filter, use
only a Freightliner-approved air filter.
1. Park the vehicle on a level surface. Apply the
parking brakes and chock the rear tires.
2. Remove the heater and air conditioner cover and
the upper dash cover. For instructions, see Sec-
tion 60.08 of the Columbia
Columbia Maintenance Manual, October 2002
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2. Wire Retainer
® Workshop Manual .