4055576997 Genuine Dryer Drive Belt 770J3 for Simpson Minimax Dryers 39S550K 39S555K 39P450K 39S455K 39P350K 39S500K 39B450P 39D456S

This is the genuine 770J3 drive belt for Simpson Minimax dryers, sold under part number 4055576997 and also listed as 0198001021. It fits a large family of Simpson models whose numbers start with 39, including the 39S550, 39S555 and 39S500, the 39P350 and 39P450, the 39B450P and 39B455S, and the 39D456S. Check the model on your dryer's rating plate against the full list before ordering.

Simpson dryer motor running but the drum will not turn

The belt wraps around the drum and the motor pulley, so it is what actually turns the drum. A worn belt stretches, glazes and starts to slip, while an old one can crack across its ribs and finally snap. Typical signs are a dryer that hums or runs with the drum standing still, a squeal or slapping noise as it starts, a burning rubber smell, or clothes that come out damp and bunched in one spot. If the drum spins far more freely by hand than it used to, a broken belt is the likely cause.

Part details

• Genuine Simpson part 4055576997
• Belt size 770J3
• Cross reference 0198001021
• Suits Simpson Minimax dryers in the 39S, 39P, 39B and 39D ranges

Replacing the dryer belt

Unplug the dryer first. Before removing anything, photograph how the old belt runs around the motor pulley and any tensioner, as the new belt must follow the same path. While the drum is exposed, clear out lint build up around the motor and check the drum supports for wear. Turn the drum by hand a few times to seat the belt, then do a short test run.

Questions about this part

How often do dryer belts need replacing?

There is no fixed interval. It depends on how much the dryer is used and how heavy the loads are. A belt that is shiny, cracked or frayed along its edges is near the end of its life and worth changing before it snaps.