ST400 Trimmer head falls off

roughcedar

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Jun 30, 2015
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Hello.

I have a B&D ST4000 electric trimmer. Earlier today the entire head assembly fell off onto the ground. The entire section that holds the string to where there is only the metal shaft left on the trimmer. It felt loose so I tore a small strip of cardboard and put it in the female shaft on the head hole (as a spacer) before putting it back on the shaft. Worked for about a minute or so and then became loose again and fell off. Added another cardboard spacer but just kept falling off immediately.

Does anyone know why it would do this and if I can fix it?

Thanks in advance for all answers.
 
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