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JOHN DEERE - T670 Back

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Functional components:
Large, 660-mm (26-in.) diameter threshing cylinder with 10 rasp bars and increased concave area
Smooth stripper roll and enlarged overshot beater
Enlarged, 800-mm (31.5-in.) separator with high-performance separation grate
Eight-wing, 400-mm (15.7-in.) rear beater and rear beater grate
Seven-step straw walker design with welded or optional bolted universal and corn-cob mix (CCM) grids
Sectional concave with quick adjustable de-awning plates

The unique multi-drum threshing system ensures a consistent crop flow by moving crop above the rear beater without sharp bends or abrupt changes in direction. This guarantees excellent grain and straw quality and reduces power requirements. The large, 10-rasp bar threshing cylinder with 660-mm (26-in.) diameter provides excellent grain quality and gentle material handling.

Combined with the enlarged wrapping angle of 124 degrees, this ensures excellent threshing efficiency and unmatched capacity even in tough separating conditions.
Four rasp bars are in constant contact with the crop against the concave area for excellent threshing and separating
Provides a large concave area and allows a slow cylinder speed
Ensures gentle threshing and separation to reduce grain damage
Large, concave wrapping angle ensures high grain separation right at the beginning and reduces separation load on the straw walkers
Wide, 1670-mm (65.7-in.) (six-walker) channel width grants maximum throughput even in tough separating conditions

The T-Series Combine threshing system uses a smooth surface stripper roller behind the threshing cylinder to gently direct the material to the overshot beater. This prevents material from back feeding on the threshing cylinder, eliminating blockages of the cylinder. The stripper roller speed runs at 125 percent ratio of the threshing cylinder speed. The 500-mm (19.7-in.) overshot beater on the T-Series Combine continues the material flow process. Material travels over the top of the beater and is directed into the separation drum. Smooth crop flow is achieved without harsh angles or abrupt changes in direction. The eight-wing beater has a constant speed. The serrated design of the wings leading edges engages the mat of material and moves the high volumes of tough, damp straw without buildup or bunching.

High versatility and flexibility with three different concave inserts available
Uptime ensured with fast exchange design
Easy access from stone trap and storage position for the concave inserts

The 800-mm (31.5-in.) extra-large separator drum provides additional separation capacity on the T-Series Combine. Due to the open design, the drum is not heavier in weight than the previous closed design.

The extra-large separator drum runs at two factory-installed speeds:
760 rpm for small grain and grass seed
380 rpm for canola, peas, and beans

There is an optional 270-rpm speed reduction kit available for corn harvest which is included in the corn package. Swapping the belt speed can be done easily and quickly by changing the drive pulley via a lever-operated tension pulley. The extra-large separator drum runs at a lower speed compared to the previous T670 design that was operated at 900/450 rpm. While it seems that higher drum speeds result in more efficient separation capacity caused by the higher centrifugal force, the opposite effect has been measured. While the centrifugal force has a vital impact on the separation capacity, speeds of the separator drum that are too high result in low exposure time in the high-performance separator grate.

The 400-mm (15.7-in.) rear beater on the T-Series Combine continues the material flow process. The beater delivers material to the straw walkers. The beater is driven directly from the extra-large separator drum and is operated at two speeds.

900 rpm for small grain and grass seed
450 rpm for rape seed, corn, peas, and beans

A separation grate is mounted underneath the rear beater. The grate is adjustable with a handle on the right side. The rear separation grate features 14 percent more open area in the separator grid and a fully rounded profile on the wires and cross bars. This creates a better separation effect thanks to a faster, unobstructed crop flow over the grid with a thinner layer of material to boost the separation of kernels trapped in straw.

Two positions are available:
Wide position recommended in rape seed, corn, peas, beans, or other sensitive crops
Narrow position for small grain or grass seed

Inside the T-Series threshing and separation system is an eight-winged, rear beater drum that separates the remaining grain out of the straw mat. The rear beater grate provides additional active separation area.

The straw walker is equipped with a closed walker trough at the rear, which ensures the grain is captured in the trough and feeds evenly on the walker return pan that is mounted below the front section of the walkers. Section dividers on the return pan help to maintain an even distribution of material onto the front chaffer of the cleaning system, even on slopes.

High throw provides efficient tossing to fluff even the largest straw mats and open channels for the kernels to drop through.
Maximum grain separation is achieved at the front section due to the impact of the straw mat when hitting the first walker steps.
Four shallow, angled steps provide maximum separating efficiency.
Different walker grids are available to match all crop and conditions.

Overall threshing and separation system benefits:
Greater level of productivity due to the enlarged concave wrapping angle, extra-large separator drum, and the high-performance separator grate
Best-in-class grain and straw quality can be achieved with the threshing and separating concept
Fast and easy adoption for different crops
Lower power consumption and excellent straw quality, making this combine the optimal choice for straw producers

The sectional concave is made with a fixed concave associated to a removable design on the front where the threshing begins.

Producers can install three different concave profiles:
Small-grain concave inserts
Universal concave inserts
Round-bar concave inserts
Sectional concave with round-bar concave inserts

The T-Series Combine is designed for high capacity. The T670 has a total sieve and chaffer area of 6.3 m (67.8 sq ft) according to ISO Norm 6689: 1997, which is the largest cleaning shoe following the John Deere X9 Combines.

The Flat Tooth Comb (FTC) chaffer prevent short straw from falling through the grid as they are equipped with special noses.
The returns are guided back to the cylinder and distributed evenly over the entire width of the threshing cylinder by an auger. The amount of material is recorded and then displayed in the cab via the electronic sensors. To visually inspect the content of the tailings returns, there is an inspection flap just outside the cab door.
The completely redesigned fan delivers up to 740 m (26,133 cu ft) of air per minute and evenly distributes air over the entire width. The large air volume paired with the air flow and the large sieve area makes additional slope compensating features obsolete.
One non-ventilated step plus two ventilated steps cascades the crop down by 41 cm (16.1 in.) to ensure effective pre-cleaning of chaff. Through intensive testing, John Deere has found the right balance between air pressure and air volume. The air pressure is used to separate the grain and the air volume allows for material to be carried away. This provides the perfect pre-separation effect and evenly divides the material between the front and rear part of the chaffer.
The heavy-duty conveyor augers ensure active crop flow on slopes and under tough harvest conditions, meaning the cleaning shoe can be optimally loaded even in damp or sticky conditions.
The total sieve and chaffer, with its considerably enlarged surface up to 6.3 m (67.8 sq ft), offers high cleaning performance even under tough threshing conditions.

The Dyna-Flo Plus cleaning system comes standard with electric adjustment on all T670 Combines. The remote cleaning shoe adjustment can be either completed from inside the cab on display settings or with the armrest buttons. As an alternative solution, such as when inspecting the shoe from the outside, settings can also be adjusted from the left side at the rear of the machine. The remote cleaning shoe adjustment motors are equipped with an integrated position sensor. This eliminates the need for recalibration of the electric motors. Calibrations only need to be redone in case the electric hardware or the cleaning shoe elements get replaced.

The quick-engage booster bar is adjustable from the outside via the stone trap with a 24-mm (0.95-in.) wrench. It has two positions. In the engaged position, the concave entrance features a profiled rasp bar. In the disengaged position, the concave entrance features a smooth transition plate. Adjustment can be completed easily within minutes.

Material flow coming from the feeder house passing the booster bar is slowed down; this increases the threshing efficiency. The booster bar does not have a negative influence on the crop flow or the grain quality. The booster bar increases threshing efficiency in hard-to-thresh crops without closing the de-awning plates, allowing maximum separation at the concave area.

The extra-fast unloading system provides a peak rate of 125 L/s (3.55 bu/sec) according to ISO 5687:1999 Norm. Compared to the John Deere S770 Combines unload rate of 116.3 L/s (3.3 bu/sec), the T670 has a faster unload rate that is also reflected in time saved when unloading on the headland. The extra-fast unloading system comes as the base option on the T670 Combine. Fast unloading on the go allows the operator to concentrate more on the crop by reducing unloading time. The higher unload rate is achieved by the grain tank cross augers, an increased discharge housing including vertical auger, larger sprockets and chain, and an overall higher speed of the unloading system. On the headland, the operator can reduce the rate by putting the machine at mid-idle or low idle; this allows for more precision, especially when the trailer is nearly full.

The improved extra fine cut straw chopper delivers excellent chopping quality and best-in-class residue distribution of chopped material in the field with a cutting width up to 10.7 m (35 ft) and 108 knives. The extra fine cut chopper comes standard with serrated chopper knives, which ensure superior splicing of the straw and improved straw rotting process. This chopper is highly recommended for producers with no tillage or minimum tillage operations. The optional dual-speed chopper drive provides flexibility to match all crops and conditions.

John Deere is committed to setting new standards in connected agriculture because this offers tremendous potential to boost productivity, save valuable time, and lower costs.

John Deere has identified the best technologies currently available on the combine market and brought them together into attractive packages:
AutoTrac automatic steering
Lifetime subscription to JDLink system
Wireless Data Transfer (WDT) to John Deere Operations Center application
Interactive Combine Adjustment (ICA)
FarmSight service packages

With the John Deere satellite-based, hands-free AutoTrac steering system, every machine pass utilizes the full cutting width of your platform. This helps you save time and fuel and boost your combine performance even at night, in dusty conditions, on hillside terrain, or after long hours of operation. The automatic steering relieves your operators and allows them to concentrate on productivity. When working with multiple machines in a field, the AutoTrac guidance lines can be shared from one machine to another so that all combines can harvest at the full cutting width. They can also be shared with the tractor or grain cart operator so the machines can drive exactly parallel to each other during unloading.

Similar models may be shown in addition to the featured model. Equipment may be shown with options.

Specifications are subject to change without prior notice.
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