The other thing that can happen if it is cold enough is snow can pack the brakes and if you set the parking brake whil it is hot it can melt enough to cause water and then freeze again in between springs and such thus keeping the shoes ecpanded after releasing the cable try pour warm water across the drum to try and melt any icing that may have occured.
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A good plan, violently executed now, is better than a perfect plan next week.
George S. Patton, General (1885-1945)
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