I am a vintage machine guy, but I do speak Spanish (but not so much the technical sewing terms). First, I think there is a typo: ahuja should be aguja = needle. Second, cangrejo (crab or crab claw) = hook. Third, niveles (levels) probably refers to adjustment.
So, I would translate it to say: Where are the adjustments for a Brother 2010,. The needle is not picking up the thread at the hook. I need to adjust it but do not know in what part of the machine to look to find the (timing) adjustments.
Now, maybe someone who knows the Brother 2010 can help out.
John Thomas in NC