Navistar WorkStar Series, Operator'S Manual

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Maintenance Instructions
Front Access HVAC Filter
1. Air Intake Housing
2. Screws
3. Filter Access Door
Cab HVAC Filter Replacement – Front Access
1. Turn screws counterclockwise one quarter turn and
open filter access door.
2. Remove filter by pulling filter out of air intake housing.
3. Install new filter into air intake housing.
4. Close and secure filter access door by turning screws
clockwise one quarter turn.
Recirculation Filters
The recirculation filters are mounted on the left and right sides of
the HVAC unit which is located in-cab under the left side dash.
1. Recirculation Filter
2. HVAC Unit
Cab HVAC Filter Replacement
1. Remove by gently pulling filter away from HVAC unit.
2. Install new filter onto HVAC unit.
3879634R1
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