Maintenance Manual

Cab Fresh-Air Filter
Replacement
IMPORTANT: When replacing the air filter, use
only a Freightliner-approved air filter.
1. Park the vehicle on a level surface, shut down
the engine, and set the parking brake. Chock the
tires.
2. Open the hood.
3. Remove the self tapping screw.
4. Remove the intake filter access panel. Slide it
down until it comes loose. See
Fig. 2.
5. Remove the filter from the slot. Note the airflow
directional arrow on the filter’s edge. When prop-
erly installed, the airflow arrow will point inboard,
toward the engine. See
Fig. 3.
6. Put a new filter in the slot, making sure the air-
flow arrow is correctly oriented, and install the
access panel. Make sure the access panel locks
into position.
7. Install a new self tapping screw (part number:
23-12187-050). Tighten the screw 12 to 17 lbf·in
(135 to 192 N·cm). See
Fig. 2.
Cab Recirculation-Air Filter
Replacement
The recirculation air filter is located on the evaporator
housing facing the interior of the cab just to the right
of center. It is accessed from the underside of the
unit. It is a coarse sponge, or fiber, filter. See
Fig. 4.
IMPORTANT: When replacing the air filter, use
only a Freightliner-approved air filter.
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1
1. Self Tapping Screw
Fig. 2, Intake Filter Access Panel
f09052604/13/2016
1. Airflow Directional Arrow Orientation
Fig. 3, Airflow Directional Arrow
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