Frequently Asked Questions About International ProStar Brake Chambers & Acc.

What are the most common brake chamber sizes for International ProStar trucks, and how do I identify which one I need?

International ProStar trucks typically use Type 30 brake chambers for the front axle and Type 30/30 or Type 36 for the rear, depending on your specific model year and configuration. To identify your brake chamber size, look for stamped numbers on the chamber housing itself, or measure the diameter of the chamber. You can also check your truck's build sheet or contact us with your VIN for exact specifications. Most 2008-2017 ProStar models use standard stroke chambers, but always verify before ordering.

Are aftermarket brake chambers compatible with my ProStar's ABS system, and will they affect warranty?

Yes, quality aftermarket brake chambers are fully compatible with ProStar ABS systems when properly installed. Look for chambers that meet FMVSS-121 standards and include proper mounting hardware. Aftermarket chambers will not void your truck's warranty as long as they meet OEM specifications. However, we recommend keeping documentation of any brake system modifications. Most chambers we carry are direct replacements that work seamlessly with Bendix and Wabco ABS systems found in ProStar trucks.

What's the average installation time for brake chambers, and what special tools are required?

Professional installation typically takes 30-45 minutes per chamber for experienced technicians. You'll need standard hand tools, a caging bolt tool for spring brake chambers, and proper jack stands or wheel chocks. Air system pressure must be completely released before starting. While installation is straightforward, we strongly recommend professional installation due to the high spring pressure in brake chambers. Improper installation can result in serious injury or brake failure.

How do I know when my brake chambers need replacement versus just adjustment?

Replace brake chambers immediately if you notice air leaks that persist after tightening connections, visible damage to the housing or diaphragm, excessive push rod travel beyond adjustment limits, or contamination inside the chamber. Regular inspections should check for corrosion, especially in winter climates where road salt is used. Typical service life is 3-5 years, but this varies based on mileage and operating conditions. If push rod stroke exceeds manufacturer specifications even after adjustment, replacement is necessary.

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

Standard stroke chambers typically have a 2.5-inch maximum stroke, while long-stroke chambers can extend to 3 inches. Long-stroke chambers provide greater braking force and are becoming more common on newer ProStar models. Your truck's compliance label will indicate which type you need - never mix standard and long-stroke chambers on the same axle. Long-stroke chambers require matching slack adjusters and proper initial adjustment to function correctly. Most 2008-2012 ProStars use standard stroke, while 2013+ models may have long-stroke chambers.