freightliner 122SD, Руководство по обслуживанию

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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.
Cab Recirculation Air Filter
Replacement
The cab recirculation air filter must be replaced every
six months, regardless of mileage, to permit proper
operation of the HVAC system. The filter can be ac-
cessed by removing the dash lower console. See
Fig. 3 .
NOTICE
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 dash lower console. The lower con-
sole is secured by nine Torx screws; see
Fig. 3 .
3. Remove the retainer that holds the recirculation
air filter in place; see
Fig. 4 .
4. Remove and discard the recirculation air filter.
5. Install a new recirculation air filter in the retainer.
6. Install the retainer in the HVAC assembly; see
Fig. 4 .
7. Install the dash lower console. Tighten the Torx
screws 24 to 30 lbf·in (270 to 340 N·cm). See
Fig. 3 .
Sleeper Air Filter Replacement
Replace the air filter in the sleeper HVAC unit every
six months, regardless of mileage. The filter should
not be cleaned.
NOTICE
If the sleeper air filter is not replaced every six
months, damage to the heater and air conditioner
components could occur. The HVAC system
should not be operated without the recirculation
air filter installed.
1. Turn off the engine, apply the brakes, and chock
the tires.
2. Access the sleeper HVAC assembly by raising
the mattress and bunk panel to the locked posi-
tion. If there is a baggage compartment, the
sleeper HVAC assembly may be accessed
through the baggage door on the right side of the
vehicle.
3. Slide the air filter out of the sleeper HVAC as-
sembly; see
Fig. 5 .
4. Place a new air filter in the sleeper HVAC as-
sembly. The edge of the filter should be flush
with the HVAC assembly.
09/11/2009 f831822
1
2
1. Air Filter Cover 2. Wire Retainer
Fig. 2, HVAC Air Intake Plenum
Heater and Air Conditioner
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122SD and Coronado 132 Maintenance Manual, February 2016
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