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| Something to bear in mind is that there are a lot of changes between a 4790 and a 2170. They do share very similar designs, but they have few parts in common. Lots of bushings got replaced with bearings (packer crank, stuffer shaft, needle carriage, knotter stack, knotter and stuffer drive sprockets, pickup pivot), the drives all run faster (47 strokes per minute vs 43), the pickup went from a dual to a quad auger arrangement (on non-cutters), the flywheel got larger and the stuffer drive went from a clamped key way to a splined drive. Of course there's more, but that's some of the key areas.
You have to keep in mind that the 4790 came out in 1998 and stayed largely unchanged until it was replaced with the 2170 in 2006. That was a lot of time for Hesston to engineer a better faster baler. :) Even then, they've been continuously making tweaks and changes to the 2170 since it hit the fields.
I think the downfall to a lot of operators is that they don't know or don't bother to make adjustments to their stuffer and that has a huge effect on the baler. Things like setting the size of the stuffer chute and adjusting the trip linkage have massive effects on the baler performance and bale quality. I've ran across way too many balers with the stuffer trip set too loose and making rough looking bales or causing unsteady plunger load when the operator has to slow down or the windrow gets light. | |
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Best big Square baler and why
