Frequently Asked Questions About Kenworth T700 AC Driers & Compressors

Will these AC driers and compressors fit my specific Kenworth T700 model year?

Most AC driers and compressors for the Kenworth T700 are compatible with model years 2011-2019. However, there are variations between early models (2011-2014) and later models (2015-2019) due to refrigerant type changes and mounting configurations. Always verify your truck's VIN and existing part numbers before ordering. If your T700 has been retrofitted from R134a to R1234yf refrigerant, you'll need components specifically designed for the newer system.

What are the most common signs that my T700's AC compressor or drier needs replacement?

Key indicators include: weak or no cold air output despite proper refrigerant levels, unusual noises from the compressor (grinding, squealing, or knocking), visible oil leaks around the compressor shaft seal, excessive clutch cycling, or moisture in the AC system causing intermittent cooling. For driers, look for system contamination, ice formation in the expansion valve, or if the drier hasn't been changed in 3-4 years. A drier should always be replaced when installing a new compressor to prevent contamination.

Can I install these AC components myself, or do I need special tools?

While mechanically inclined operators can handle the physical installation, proper AC service requires specialized equipment. You'll need a refrigerant recovery machine, vacuum pump, manifold gauges, and leak detection tools. The system must be properly evacuated and recharged with the correct amount of refrigerant and PAG oil. Most installations take 2-4 hours. We recommend professional installation to maintain your warranty and ensure proper system operation, as improper installation can damage expensive components.

What's the difference between OEM and aftermarket AC compressors for my T700?

OEM compressors (typically Sanden or Denso units) offer exact fit and proven reliability but cost 30-50% more than aftermarket options. Quality aftermarket brands like Red Dot, MEI, and Valeo provide comparable performance and often include upgraded features like improved clutches or enhanced cooling capacity. All reputable aftermarket units meet or exceed OEM specifications. The main differences are warranty length (OEM usually 2 years, aftermarket 1 year) and core return requirements.

How often should I replace the AC drier, and can I reuse my existing one?

The AC drier should be replaced every time the AC system is opened for major service, including compressor replacement. Never reuse an old drier when installing a new compressor - this is the leading cause of premature compressor failure. Driers absorb moisture and trap contaminants; once exposed to air, they quickly become saturated. For preventive maintenance, replace the drier every 3-4 years or 300,000 miles even if the system hasn't been opened. The $30-50 cost of a new drier protects your $300-600 compressor investment.