Part 279640 by PartsBroz includes an idler pulley, washer, and tri-ring lock. The idler pulley sits between the motor and drum to keep tension on the drive belt. When working properly, the part allows the belt to turn so that the dryer's drum spins. An idler pulley needs replaced if the bearing goes bad and ruins the shaft.
Installation Tips
Always disconnect your dryer from its power source before beginning any repair. Recommended tools include a 5/16-inch nut driver, a quarter-inch nut driver, and a small flathead screwdriver. Before installing the new part, check out the shaft. Make sure that it's still smooth. If it's scratched up or gauged from the bad bearing on the old idler pulley, you'll need to replace the bracket assembly too.
Easy Fix for a Broken Dryer
Replacing a broken idler pulley can fix several problems:

Dryer is squeaky or noisy;
Dryer doesn't tumble or spin;
Dryer doesn't start.
Compatible brands and models include but are not limited to:
Whirlpool: GEQ9800LW0, GEQ9800LW1, GEQ9800PW1, GEW9200LL1, GEW9200LQ0, GEW9200LW0, GEW9200LW1, GEW9250PL0, GEW9250PW0, GEW9250PW1, GEW9868KQ0, GEW9868KQ1, GGW9200LL1, GGW9200LQ0, GGW9200LW0, GGW9200LW1.
Kenmore/Sears: 110.86747701, 110.86747702, 110.86757701, 110.86762700, 110.86762701, 110.86781100, 110.86781300, 110.86781600, 110.86781700, 110.86781800.
Replaces Several Part Numbers
This part is a functional equivalent to part numbers 279640, AP3094197, 279640VP, 2958, 3388672, 697692, AH334244, EA334244, ER279640, PS334244 and TJ279640.
Questions about compatibility? Please comment below in the customer questions and answer section or send us a message on the PartsBroz storefront.