I agree with guru that the auger on our 1680 can be very difficult to grease. Put one guy on the machine with a grease gun and the other picking up the end of the auger while it in folded. If that doesn't work, try to pump grease while you move the auger to the extended position. We grease the heck out of ours all the time, probably 15 shots in each zerk daily, even if we've only run a few hours. That keeps the zerks taking grease and the auger working smoothly.