Frequently Asked Questions About International 4700-4900 Brake Chambers & Acc.

Will these brake chambers fit my specific International 4700 or 4900 model year?

Most brake chambers for International 4700-4900 series trucks are compatible with models from 1989 through 2001. However, there are variations based on your truck's brake system configuration. Medium-duty 4700 models typically use Type 20 or Type 24 chambers, while heavier 4900 models often require Type 30 chambers. Always verify your existing chamber size and stroke length before ordering. The type number is usually stamped on the side of your current brake chamber.

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

Standard stroke chambers typically have a 2.5-inch maximum stroke, while long stroke chambers extend to 3 inches. Long stroke chambers are required for trucks manufactured after specific dates due to FMVSS-121 regulations. For International 4700-4900 trucks, models from 1994 onward generally require long stroke chambers. Using the wrong stroke length can cause brake adjustment issues, reduced stopping power, or compliance violations during inspections.

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

While brake chamber replacement is possible for experienced DIY mechanics, it requires specific tools and safety precautions. You'll need a caging bolt tool, proper wrenches, and air line fittings. The spring inside brake chambers is under extreme pressure and can cause serious injury if mishandled. Most customers report the job takes 1-2 hours per chamber. We strongly recommend professional installation if you're not experienced with air brake systems, as improper installation can lead to brake failure.

How do I know if I need to replace my brake chambers or just the diaphragm?

Common signs of brake chamber failure include air leaks (hissing sounds), uneven brake application, or excessive push rod travel. If the chamber housing is cracked, severely rusted, or the push rod is bent, you'll need a complete replacement. Minor air leaks from the diaphragm can sometimes be fixed with a rebuild kit, but many mechanics recommend full replacement for reliability, especially on older 4700-4900 trucks where labor costs exceed the price difference.

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

Quality aftermarket brake chambers from reputable manufacturers like MGM, Gunite, or Dayton Parts meet or exceed OEM specifications and often carry similar warranties. Many fleet operators report comparable lifespan and performance to original equipment. The key is ensuring the chamber meets FMVSS-121 compliance standards and matches your truck's specifications. Avoid extremely cheap no-name brands, as brake chambers are critical safety components where quality matters.