Brake Shoes PA4707 / FMSI 4707 - 16.5" x 7" Q-Plus S-Cam Heavy-Duty

A loaded Class 8 tractor coming down a five-percent grade carries roughly eight hundred thousand foot-pounds of kinetic energy. The friction surfaces inside its drum brakes turn most of that energy into heat in under a minute. Q-Plus is the FMSI designation for the friction grade engineered for that duty cycle, the one that holds rated coefficient under sustained 800°F drum temperature without fading and without glazing. The PA4707 is the 16.5 by 7 inch shoe assembly built to that grade, the size you see on virtually every air-brake S-Cam axle currently in service on a North American highway tractor or trailer.

Fits

• 16.5" x 7" S-Cam air brake systems
• Class 8 tractor steer and drive axles
• Heavy-duty trailers with S-Cam actuation
• FMSI designation: 4707 (Q-Plus friction grade)

Cross-Reference

The PA4707 carries the FMSI 4707 reference number, which is the multi-make industry standard for this shoe geometry. If your shop is replacing OEM-equivalent Q-Plus shoes, this is the same part by another stock number.

Shipping

Stocked in Hodgkins, Illinois. Orders placed before 2:00 PM Central Time ship the same business day. Net-30 terms available to qualified fleet accounts. For bulk fleet pricing, contact us directly.