BRAKE TEMPERATURE SIGNALS
(Temperatures indicated are at the lining/drum interface. Temperatures are approximate.)
550ºF - 650ºF - Brake resin odor is present
850ºF - Brakes begin to smoke
1100ºF - Brake oxidation occurs as brake parts open to air rushing by
1250ºF - Drums become cherry red internally
+ 1250ºF - 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 above, under three(3) conditions:
• The rated axle capacity of the brake material hasn’t been exceeded.
• That at the temperature above 850ºF, the driver does not over speed the vehicle where severe or sudden braking can be expected.
• That the brake lining is not contaminated with grease or oil.
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