Frequently Asked Questions About Kenworth T660 Brake Chambers & Acc.

Will these brake chambers fit my specific year model Kenworth T660?

Most brake chambers for the Kenworth T660 are compatible across the entire production run from 2008-2016. However, there can be variations based on your truck's brake system configuration (standard vs. extended service). Always verify the chamber size (Type 20, 24, or 30) and mounting style by checking your existing chamber's data tag or consulting your truck's build sheet. If you're unsure, our team can help identify the correct part with your VIN number.

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

Standard brake chambers typically have a 2.5-inch stroke length, while long-stroke chambers extend to 3 inches. Long-stroke chambers provide better braking performance and are often required for trucks with air disc brakes or those meeting newer FMVSS-121 regulations. Your T660's original equipment specifications will determine which type you need - mixing chamber types on the same axle can cause uneven braking and premature wear.

How difficult is it to replace brake chambers on a T660, and what tools do I need?

Brake chamber replacement is a moderate-difficulty job that typically takes 30-45 minutes per chamber for experienced mechanics. You'll need basic hand tools, a caging bolt tool, and proper jack stands. The main challenges include safely caging the spring brake, dealing with tight clearances near the frame rails, and ensuring proper air line routing. Always cage the spring brake before removal and verify pushrod adjustment after installation. Due to safety concerns, many drivers prefer professional installation.

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

Quality aftermarket chambers from reputable manufacturers like MGM, Gunite, or TSE can match OEM performance when properly specified. Look for chambers that meet FMVSS-121 standards and carry DOT certification. The key differences often come down to warranty coverage (OEM typically offers 3 years vs. 1-2 years for aftermarket) and minor variations in spring pressure ratings. Avoid extremely cheap chambers as they may use inferior diaphragm materials that fail prematurely in extreme temperatures.

What are the warning signs that my T660's brake chambers need replacement?

Replace brake chambers immediately if you notice air leaks (hissing sounds or pressure loss), excessive pushrod travel beyond 2 inches, visible damage to the housing, or if the parking brake won't fully release. Uneven brake wear, pulling during braking, or one wheel locking up before others also indicate chamber problems. During pre-trip inspections, check that pushrods move smoothly and return fully when brakes are released. Most chambers last 300,000-500,000 miles under normal conditions, but harsh environments can reduce lifespan.