John Deere Combines

John Deere Combines 27
Why a compact cleaning shoe is better.
To balance the highest threshing and separation capacity offered by the
S-Series, John Deere uses a unique cleaning shoe design to offer our customers
the greatest cleaning density and highest performance level. It’s proof you can
get the biggest results from a small package.
Here’s the inside story. As you’re operating your combine, the chaff load on the
shoe is always in motion, especially with changing speeds and slopes. So how
do you maintain a uniform fl ow above the sieves to make sure all the grain is
separated while keeping the grain tank free from chaff and dirt?
Imagine the chaff and clean grain load above the sieves as the surface of a
balloon. As the sieve area gets bigger, the balloon expands. That means the
chaff and grain mat above the sieve gets thinner – just as the balloon’s rubber
surface gets thinner. The chances of seeing a hole in the mat of material
airborne above the sieve – like a puncture in the surface of the balloon – is
increased. The result: poor cleaning shoe performance or a fl at balloon.
For this reason, John Deere has adopted advanced technology to deliver high
shoe performance versus large dimensions. Our cleaning shoes feature auger
bed preparation, multiple steps, and pre-cleaner separation – all features that
ensure the right delivery of material and airfl ow for the cleaning shoe. In
addition, John Deere cleaning shoe operates at higher speeds and longer shoe
strokes. That makes our machines less sensitive to adjustment and slopes than
other combines.