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My front derailleur is jammed by dirt (grease + fine dust), because of this the gear doesn't shift perfectly and chain is thrown off the cog. The spring is a bit unreachable because the derailleur arm comes in the way. How should I clean the spring and protect it from jamming again.

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  • You can just remove the derailleur, it's not that difficult.
    – Klaster_1 Нет войне
    Commented Dec 7, 2014 at 10:54
  • I have done that many times but this time the spring is sunk in dirt and that is just not coming off. thats the problem here this has made the spring nearly loose all it's spring(iness).
    – user14633
    Commented Dec 7, 2014 at 11:02
  • how are you trying to clean the dirt off? a (not high pressure) hose, kitchen brush and bike cleaning fluid (i.e. degreaser) generally work for me.
    – PeteH
    Commented Dec 7, 2014 at 13:16
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    Use a toothbrush. (Not yours, your wife's.)
    – Daniel R Hicks
    Commented Dec 7, 2014 at 13:24
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    You can take the whole derailleur off without opening the chain and give it a thorough cleaning and greasing. If you have the possibility of using compressed air (friendly garage!) you can blow out the remaining grit.
    – Carel
    Commented Dec 7, 2014 at 15:26

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I went to my favorite cycle mechanic and he dropped kerosene on the derailleur and then brushed the dirt off easily.

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