Frequently Asked Questions About International S1700-S1900 Drum Brake Parts

Which specific International S-Series models and years are compatible with these drum brake parts?

These drum brake parts are designed for International S1700, S1800, and S1900 series trucks manufactured between 1979 and 2004. The S1700 and S1800 models typically use 15" x 4" front brakes and 16.5" x 7" rear brakes, while the S1900 series often requires 16.5" x 5" front brakes. Always verify your specific model year and GVW rating, as International made mid-year changes that can affect brake specifications. Check your VIN plate or existing brake hardware for exact measurements before ordering.

What are the most common installation challenges when replacing drum brake components on these trucks?

The primary installation challenges include seized brake adjusters due to rust and corrosion, especially on trucks exposed to road salt. Many technicians report difficulty removing old brake drums that have worn grooves or lips on the friction surface. You'll need a brake drum puller for stubborn drums and penetrating oil for frozen adjusters. The slack adjusters on these models require precise adjustment - too tight causes premature wear, too loose results in poor braking. We recommend having a brake spring tool kit specifically designed for heavy-duty applications, as the return springs require significant force to install properly.

Are aftermarket brake shoes and drums as reliable as OEM parts for these International models?

Quality aftermarket brake components from established manufacturers like Gunite, Webb, and Meritor meet or exceed OEM specifications for these trucks. These brands use the same friction material compounds and casting standards as original equipment. The key difference is price - aftermarket options typically cost 30-40% less than OEM. However, avoid economy-grade imports that may use inferior friction materials or improperly heat-treated drums. Look for brake shoes with edge codes that indicate the friction material rating, and drums that specify SAE J431 G3000 grade cast iron for proper heat dissipation and wear characteristics.

How do I know when to replace drums versus just replacing brake shoes?

Brake drums should be replaced when they exceed the maximum diameter stamped on the drum (typically 0.120" over nominal size for these International models). Use a drum micrometer to check for out-of-round conditions - anything over 0.015" requires replacement. Visual indicators include heat checking (small cracks on the friction surface), deep scoring that cannot be machined out, or blue discoloration from overheating. If your drums are within specifications but near the maximum diameter, it's cost-effective to replace them with the shoes to avoid another brake job in the near future. Most S-Series drums can be turned once or twice maximum before reaching discard dimensions.

What additional parts should I replace during a complete drum brake service?

A thorough brake job includes more than just shoes and drums. Replace all return springs and hold-down hardware, as these lose tension over time and can cause uneven shoe wear or brake drag. Inspect and replace wheel seals to prevent gear oil contamination of the new friction material. Check slack adjusters for proper operation and replace if they won't hold adjustment. Brake chambers should be tested for leaks and proper stroke. Don't forget new dust shields if yours are damaged or missing - they prevent road debris from accelerating wear. Budget for fresh DOT 3 brake fluid if your system shows any contamination or if it's been more than two years since the last flush.