Specifications
8. Remove the chocks from the tires.
Cab Recirculation Air Filter
Replacement, Water-Valve
Controlled
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
Century Class Trucks Work-
shop Manual
.
3. Remove and discard the foam filter.
4. Using velcro tape, attach a new filter to the
HVAC cover. See
Fig. 5.
5. Install the upper dash cover and the heater and
air conditioner cover. For instructions, see Sec-
tion 60.08 of the
Century Class Trucks Work-
shop Manual
.
6. 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-
02/26/2002
f831493
1
2
1. Air Filter Cover 2. Wire Retainer
Fig. 4, HVAC Air Intake Plenum, Blend Air
11/14/2000
f831418
1
2
2
3
4
1. HVAC Cover
2. Velcro Tape
3. Seal Cover
4. Recirculation Filter
Fig. 5, Cab Recirculation Air Filter, Water-Valve
Controlled
Heater and Air Conditioner 83
Century Class Trucks Maintenance Manual, April 2003 83/3