Know Your Brake Temperature
Note: Temperatures indicated are at the lining/drum interface and are approximate.
- 550°F - 650°F
Brake resin odor is present
Brakes begin to smoke
Brake oxidation occurs at parts of the brake open to air rushing by
Drums become cherry-red internally
Danger of run-away due to excess drum expansion
Brake lining will remain within its designated friction range on a properly maintained brake through all of the temperatures described under three conditions:
- That the rated axle capacity of the brake material has not been exceeded. If this condition is present, more than normal fade can be present at higher temperatures.
- That at temperatures above 850°F, the driver does not over-speed the vehicle where severe or sudden braking can be expected. Under safe operating conditions, the brake lining on a properly applied and maintained brake will remain stable at high temperatures. Excessive speed while the brakes are hot may result in longer stopping distances.
- That the brake lining is not contaminated with oil or grease.