Frequently Asked Questions About Kenworth T800 Drum Brake Parts

What year models of Kenworth T800 are these drum brake parts compatible with?

Our drum brake parts are designed to fit Kenworth T800 trucks from 1986 through 2023. However, compatibility can vary based on your specific axle configuration and brake system type. We recommend checking your truck's VIN or contacting us with your truck's year, axle manufacturer (such as Meritor, Dana, or Eaton), and brake size (typically 16.5" x 7" or 16.5" x 8.625") to ensure proper fitment.

How do I know when to replace my brake drums and shoes?

Replace your brake drums when they reach the maximum diameter stamped on the drum (usually 0.120" over original size) or show signs of heat checking, deep scoring, or cracks. Brake shoes should be replaced when lining thickness reaches 1/4 inch at the thinnest point or if you notice uneven wear patterns. Most T800 operators report replacing shoes every 150,000-250,000 miles and drums every 300,000-500,000 miles, depending on application and driving conditions.

What tools and expertise are needed to install these brake components?

Installing drum brake components requires a brake spring tool kit, drum puller, torque wrench, and jack stands rated for commercial vehicles. The job typically takes 2-3 hours per axle for experienced mechanics. Critical steps include proper adjustment of slack adjusters, ensuring correct shoe-to-drum clearance (typically 0.020-0.030"), and torquing wheel bearings to manufacturer specifications. We strongly recommend professional installation if you lack commercial vehicle brake experience, as improper installation can lead to brake failure.

What's the difference between standard and heavy-duty brake shoes for my T800?

Standard brake shoes typically feature 4515 or 4707 friction material rated for general highway use, while heavy-duty options use 4709 or 4720 material designed for severe service applications like logging, construction, or mountain driving. Heavy-duty shoes generally last 20-30% longer but cost about 15-25% more. The friction material thickness is the same (typically 3/4"), but heavy-duty compounds better resist heat fade and provide more consistent stopping power under extreme conditions.

Can I mix different brands of brake components on my T800?

While brake drums, shoes, and hardware from different manufacturers can technically work together if they meet the same specifications, we recommend using matched components from the same manufacturer for optimal performance. Mixing brands can lead to uneven wear and unpredictable braking characteristics. Always replace brake shoes in axle sets (all 4 shoes on an axle) and never mix different friction materials on the same axle. Popular OEM and aftermarket brands for T800s include Gunite, Webb, Meritor, and ArvinMeritor.