Kitchenaid mixer dropping metal shavings My fiance and I have been using our KitchenAid 600 series pro mixer almost daily for close to 7 months now with no issue.

Today I wanted to surprise my fiance with homemade whole wheat pasta, and followed the KitchenAid recipe exactly. First, the recipe was completely incorrect (needed triple the required water, and two tablespoons of olive oil to get the correct consistency). Using their specified recipe basically left me with sand.

After making the adjustments, I re-ran the dough with the paddle, and then again with the dough hook.

This time both parts occasionally had a hard time with the firmness of the dough. At all times the speed limit of 2 was obeyed from the manual. It DID finish the dough; I hand kneaded for a few minutes, and threw it in the fridge where it is currently sitting.

However, afterwards I noticed small bits of metal shavings on the counter around where the KitchenAid had been sitting. Has anyone encountered this? Do I need to get a replacement (if they'll even honor it since we bought it from the original buyer)? Do I need to get it serviced? I ran the mixer without the bowl for a few minutes just to see if more shavings would fall but none seem to be doing that. Could it be a one time fluke? I'm just trying to find out more about my situation.
From the sounds of it, because you were using it for a rather dry dough, it might've had to work more than it usually does, and could have resulted in some grinding of gears.

Now, if the mixer completely bogs down, most Kitchenaid models have a sacrifical gear that's made of plastic that will get destroyed close to the motor (ie, up top, not near the planary action bits near the bowl), but it's possible for it to not be quite bogged down enough for that to get destroyed.

As for servicing them, they're actually pretty easy to work on, provided you keep track of the parts and have a set of lock-ring pliers.  (and if you open up the gear box up top, some grease to re-pack it).

When I helped service a friend's 600, we found plenty of manuals online; but be aware that there's more than one model of 600.  (mine had a different model number than hers).  

I'd personally try to check the planetary gears, and check if there are more shavings in there -- if so, it's a problem and at the very least, you need to empty it out.  If I recall correctly, you don't actually need to open up the main housing -- there's either a pin you can punch out, or a retaining clip at the top of the shaft that you attach tools to, and you can remove the cover without too much difficulty.  (I think it's the newer models that use the retaining clip; see the manual I linked to for those that use a pin)

The other gearbox up above isn't going to throw shavings -- it's packed in grease within a sealed case, so if there are shavings, it's going to not get thrown free (instead, it'll continue damaging the gears)