Frequently Asked Questions About Kenworth T700 Brake Chambers & Acc.

Will these brake chambers fit my specific year model Kenworth T700?

Most brake chambers for the Kenworth T700 are compatible with model years 2011-2019. However, there can be variations based on your truck's brake system configuration (air disc vs. drum brakes) and axle manufacturer. We recommend checking your existing brake chamber's part number or contacting us with your VIN to ensure proper fitment. Early 2011 models may have different mounting brackets than 2015+ models.

What's the difference between Type 30 and Type 36 brake chambers for my T700?

Type 30 and Type 36 refer to the square inch area of the diaphragm. Type 30 chambers (30 square inches) are typically used on front axles and provide adequate braking force for steering axles. Type 36 chambers (36 square inches) are larger and commonly used on drive and trailer axles where more braking force is needed. Your T700's GAWR (Gross Axle Weight Rating) determines which type you need - heavier rated axles require larger chambers.

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

While brake chamber replacement is possible for experienced mechanics, it requires specific tools including a caging bolt tool, proper wrenches for air line fittings, and thread sealant. The job typically takes 1-2 hours per chamber. Critical safety note: improperly installed brake chambers can cause brake failure. If you're not experienced with air brake systems, we strongly recommend professional installation. Always cage the spring brake before removal to prevent injury.

How do I know if I need standard or long stroke brake chambers?

Long stroke chambers provide 3 inches of pushrod travel compared to 2.5 inches for standard stroke. Most T700s built after 2011 use long stroke chambers to meet FMVSS-121 requirements. Check your existing chamber's data tag or measure the pushrod travel at full brake application. Long stroke chambers are marked with a square or trapezoidal tag, while standard stroke chambers have round tags. Using the wrong stroke length will affect your brake adjustment and stopping distance.

What are the signs that my T700's brake chambers need replacement?

Common indicators include: air leaks from the chamber housing (listen for hissing), slow brake application or release, uneven braking between wheels, excessive pushrod travel even after adjustment, or visible damage to the chamber housing. Spring brake chambers that won't release or hold parking brake pressure also need immediate replacement. Most chambers last 5-7 years under normal use, but harsh environments can shorten lifespan to 3-4 years.