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Mercedes W123 230ce 1984
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W123 230ce 1984

Noticed my alternator belt was making a squeal and it requires tightened up. It the alternator with the teeth on the bolt that you move in either direction to tighten or loosen. Information from the internet states all three ? bolts must be loosened holding the alternator before turning the adjustment screw but I’m unsure what ones they are, can anyone advise?
Thanks.
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W123 300CD, W123 300TD, W202 C250D Turbo
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1. The nut on the back of the tooth bolt so it will move
2. The bolt closer to the block and in line with the tooth bolt - just loosen so the bracket can move down as you adjust the tooth bolt away from the block
3. The bottom bolt the alternator pivots on - Just loosen so it will pivot freely as the alternator moves away from the block
 
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