Help clear moisture and contaminants from your truck's air conditioning system with the Four Seasons A/C Receiver Drier / Filter Drier, part number 33356, a steel filter drier that traps contaminants flushing alone cannot remove. It fits many trucks, among them the 1990-1998 Mack CH, 1992-1998 Mack CL and 1990-1993 Peterbilt 320, as a direct-fit replacement for the listed applications. See the Buyer's Guide tab for the full list and engine details.
This part is listed under both names: A/C receiver drier and filter drier.
- Filters the A/C system: The drier works as a filter, removing moisture and contaminants from the air conditioning system that flushing cannot clear.
- Desiccant bag: High-quality desiccant held in a desiccant bag absorbs moisture in the system.
- Welded steel construction: Quality welds are designed to give a durable, leak-free unit.
- Installation seals: Four Seasons states that its accumulators and filter driers come with the necessary gaskets, O-rings and seal for easier installation.
A leaking or "open" system can saturate the desiccant bag within a few hours, which leaves the drier ineffective. Four Seasons states that replacing the drier is required to validate the compressor warranty, and that the drier must be replaced any time the A/C system is serviced. Four Seasons produces its accumulators and filter driers in an ISO/TS16949 and ISO14001 certified facility, and it has more than 50 years of mobile A/C experience.
Signs the receiver drier / filter drier may need replacing include an A/C system that has leaked or been opened for service, reduced cooling, or moisture or contamination found during service. Diagnose the cause before replacing parts.
