John Deere 9660 STS Combines

John Deere 9660 STS

Average price

$36,471.43

4/5 rating
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5+

sold in last year

General overview

John Deere 9660 STS is a combine harvester built for field harvesting in farm equipment operations. It is powered by a diesel engine and is listed with an engine power of 248 kW (338 hp), a rated power of 224 kW (305 hp), and Tier 2 or 3 emissions compliance. Produced in the United States from 2004 to 2007, it represents a large-format machine for grain harvest work.

Key operating features include a rotary separator, wheel propulsion, and a fixed or Multi-speed drive type. The combine is equipped with an 8,810 L (2,327 US gal) grain tank, a peak unloading rate of 78 L/s (1,236 gpm), and an unloading auger length of 6.53 m (21 ft 5 in). Its sieve area is 4.58 m² (49.3 sq ft), supporting crop separation during harvest.

Category
Manufacturer
Year

2004, 2005, 2006, 2007

Country of manufacturing

United States

General specifications

Dimensions

Width

Height

Length

Weight

3,950 mm

~155.5 in

4,520 mm

~178 in

8,650 mm

~340.6 in

13,523 kg

~29,813.1 lb

Engine Power

338 hp

Emission standard level

Tier 2 or 3

Grain tank size

8,810 L

Peak unloading rate

78 L/sec

Additional specifications

Engine type

Diesel

Displacement

496 cu(in)

Fuel tank

945 L

Type of propulsion

Wheel

Drive type

Fixed or Multi-speed

Conveyor chain slat type

Cast Iron

Separator type

Rotary

Sieve area

4.58 sq(m)

Unloading auger length

6.53 m

Unloading rate

78 L/sec

Rated power

305 hp

John Deere 9660 STS Combines Listings

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Combines
Used

$29,500

Tier 2 or 3

305 hp

Diesel

Holgate, United States

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Combines
Used

$32,500

78 L/sec

4WD

8810 L

Holgate, United States

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Combines
Used

$34,500

Duals

8810 L

338 hp

Holgate, United States

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Combines
Used

$45,900

4.58 sq(m)

8810 L

305 hp

4062 hours

Warsaw, United States

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Combines
Used

$49,500

8810 L

496 cu(in)

305 hp

3469 hours

Monticello, United States

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Combines
Used

$33,500

8810 L

78 L/sec

4.58 sq(m)

4670 hours

Holland, United States

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Combines
Used

$25,900

8810 L

305 hp

945 L

4008 hours

Assumption, United States

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John Deere 9660 STS Combine
John Deere 9660 STS Combine

8810 L

13523 kg

8650 mm × 3950 mm × 4520 mm

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4.0

Rating

Based on ratings and reviews from verified buyers.

Overall rating

1 reviews

5

4

3

2

1

Performance & Productivity

4.0

Reliability & Durability

5.0

Comfort & Ergonomics

5.0

Safety

5.0

Technology & Features

3.0

Dennis Moore
Review Dot Separator
July 2026

Second season on it and it's still impressing the operators. A big tank and fast unload cut our wait on the grain cart in oats. My only gripe is that fuel per acre is high when you don't need the capacity.

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Most popular

No confirmed market price is supplied for the John Deere 9660 STS. Check current listings and compare machine condition, location, configuration, maintenance records, and included attachments.

Listed features include a rotary separator, 8,810 L grain tank, 78 L/s unloading rate, 945 L fuel tank, and wheel propulsion. It is available with Fixed or Multi-speed drive types and uses cast-iron conveyor-chain slats.

The John Deere 9660 STS uses a Diesel engine with 496 cu in displacement.

The 9660 STS has 338 hp engine power and 305 hp rated power.

The John Deere 9660 STS uses Diesel fuel.

The supplied specifications do not identify particular crops or jobs for which the John Deere 9660 STS is best suited. Its listed configuration includes a rotary separator, wheel propulsion, and an 8,810 L grain tank.

The supplied data does not confirm an expected service life for the 9660 STS. For a used machine, assess maintenance history, operating condition, wear in the separator and unloading system, and the condition of major mechanical components.

Check maintenance records, engine condition, fuel system, separator, sieve area components, grain tank, unloading auger, conveyor-chain slats, drive system, tires, and signs of leaks or excessive wear. Confirm that all operating functions work during inspection.