“Wind Tunnel”™ Cleaning System

From the fan to the spreader, the Challenger cleaning system is designed to quickly and efficiently remove chaff, dirt and debris from high-yielding crops and move the grain quickly into the tank.

A large, 11-in. (279 mm) transverse cleaning fan on the 660B and 670B and a 13-in. (330 mm) transverse fan on the 680B, starts separating the chaff from the grain the second it leaves the grates in the rotor. That’s because air flows straight through the cleaning fan, instead of entering at a right angle.

The result is less cavitation and turbulence and greater air volume and pressure throughout the shoe for improved cleaning capabilities and capacity. Naturally, fan speed and air velocity are infinitely adjustable via two speed ranges and a variable speed control in the cab.

 

 

Challenger 600B Series combines are also unique for their use of a Cascade Cleaning System. Sized to match the capacity of the combine and the AHS rotor, the cleaning shoe on the Challenger 660B measures 6,768 in2 (4.36 m2), while the Model 670B and 680B boast 8,296 in2 (5.35 m2) of cleaning surface. 

As crop material falls from the grain pan, it gently cascades to the chaffer via a cascade chaffer pan. The reciprocating grain pan and air from the cleaning fan begin the cleaning process by floating the residue rearward while grain falls through the chaffer openings to the lower cleaning area. Here, final crop cleaning ensures that only the cleanest grain goes into the grain tank. Grain that doesn’t fall through the sieve goes into the returns system for processing. 

Because the cleaning system uses a main and a cascade grain pan in lieu of multiple augers to move the crop, grain quality and machine reliability have been improved, while the complex drives associated with auger beds have been eliminated.

 

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Center-Mounted Cab
 
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Options
 
SmarTrac® Lateral Tilt System
 
“Wind Tunnel”™ Cleaning System
 
Grain Handling Capacity
 
High-Capacity Feeding
 
State-of-the-Art C2000 Console
 


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