![]() When the gearbox is locked up, both the inner shaft, which drives the agitator, and the outer shaft, which drives the tub, spin at the same speed as the input pulley. When the small gear moves, it moves this outer shaft with it, and the small notch engages the single tooth that is fixed to the lockup mechanism. This notch is hollow, and is attached to the shaft with the small helical gear. You can see a small notch in the outer shaft. If it slides to the left, it engages a mechanism that locks up the gearbox. Depending on which way the gears are spinning, the angle on the teeth will tend to force the inner gear to slide either to the left or to the right inside the gearbox. These are the only two gears with angled teeth. There is also a smaller gear with angled teeth behind the big one in the foreground. ![]() In the figure above, notice the gear with the angled teeth. The interesting thing here is that when the motor spins the gearbox in one direction, the agitator runs, and when it spins it the other way, the whole machine locks up. When the washer goes into spin cycle, the whole mechanism locks up, causing everything to spin at the same speed as the input, which is hooked up to the motor. ![]()
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March 2023
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