Frequently Asked Questions About Kenworth T800 Brake Chambers & Acc.

What size brake chambers fit my Kenworth T800, and how do I determine the correct type?

Kenworth T800 trucks typically use Type 20, Type 24, or Type 30 brake chambers, depending on your truck's year and axle configuration. To determine the correct size, check the stamped numbers on your existing chambers or measure the diameter of the chamber housing. Front axles commonly use Type 20 chambers, while rear axles often require Type 24 or Type 30. Always verify your specific model year requirements, as configurations changed between 1986-2015 production years.

Can I install standard brake chambers myself, or do I need special tools?

While brake chamber replacement is possible for experienced mechanics, it requires specific tools including a cage bolt tool, proper wrenches, and air pressure gauges. The job involves working with compressed air systems that can be dangerous if mishandled. Most installations take 1-2 hours per chamber. We strongly recommend professional installation if you're unfamiliar with air brake systems, as improper installation can lead to brake failure.

What's the difference between standard and long-stroke brake chambers for my T800?

Standard brake chambers typically have a 2.5-inch stroke, while long-stroke chambers provide 3 inches of stroke. Long-stroke chambers offer better braking performance and are required on many T800s manufactured after 1995. They provide more brake force with the same air pressure and help maintain proper brake adjustment longer. Check your vehicle's compliance label or consult your VIN-specific requirements to ensure you're meeting DOT regulations.

How often should I replace brake chambers, and what warning signs indicate failure?

Brake chambers typically last 3-5 years under normal operating conditions, but inspect them every 90 days. Replace immediately if you notice air leaks (hissing sounds), visible diaphragm damage, excessive rust, slow brake release, or uneven braking. Spring brake chambers showing any signs of damaged parking brake springs must be replaced immediately as they pose serious safety risks. Regular inspection during pre-trip checks can prevent roadside failures.

Are aftermarket brake chambers as reliable as OEM Bendix or Haldex units?

Quality aftermarket chambers from reputable manufacturers like MGM, Gunite, and TSE meet or exceed OEM specifications and often cost 30-50% less than Bendix or Haldex originals. Look for chambers that meet FMVSS-121 standards and carry DOT certification stamps. The key difference is typically warranty length - OEM units often include 3-year warranties while aftermarket versions offer 1-2 years. For most applications, certified aftermarket chambers provide identical performance and reliability.