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Re: New Holland 474 Haybine - Hay wrapping on roll
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Posted by Adam B. on May 18, 2004 at 21:16:03 from (207.221.80.247):
In Reply to: New Holland 474 Haybine - Hay wrapping on rollers posted by Joe on May 17, 2004 at 04:05:40:
We had the same problem with our 489's in very tall hay. What I saw happening was the rolls grabbing the crop and tearing it up by the roots before the knife could cut it, then the crop would wrap or cause a slug to form and plug it up. Waiting for the field to dry off as much as possible helps, but having really tall grass combined with early Summer rains usually doesn't allow for complete drying (around here anyway). As a temporary fix for 1st cutting, we would sometimes back the tension off the conditioning rolls, pry them apart and insert a small block of square steel tubing under each end of the upper roll (one end at a time). With the upper roll sitting on the blocks, draw the tension up a little. Be sure to remember how many cranks you backed it off in the first place, then how many you cranked it down after inserting the blocks, so you can reset the machine back to how it was when you remove the blocks later on. The result is about a 2" gap between the rolls. Without contact, the rolls don't grab and tear the crop and don't have much tendency to wrap. We never lost a block out or had any damage to the machines as a result of doing that. The downside is that the hay isn't being crushed by the conditioning rolls, but we didn't have the wrapping/plugging problems either. We now use a pair of John Deere 935 disk mowers with the impeller conditioning, and they chew through tall and heavy crops as easily as short and thin ones.
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