John Deere 9770 STS Combines

John Deere 9770 STS

2/5 rating
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5+

sold in last year

General overview

John Deere 9770 STS is a combine harvester used for field harvesting and grain handling in crop production. It is powered by a Diesel engine with a displacement of 9 L (548 cu in), and the available power figures are 265 kW (360 hp) rated power and 283 kW (385 hp) engine power. The emission standard level is Tier 3.

This model uses a Rotary separator and Wheel propulsion with Fixed or Variable drive type. Its grain tank size is 10,572 L (2,793 US gal), and the peak unloading rate is 116 L/s (1,839 gpm). Other defining specifications include an unloading auger length of 6.86 m (22 ft 6 in), a chaffer of 1.89 m² (20.3 sq ft), a sieve area of 4.49 m² (48.3 sq ft), and a concave area of 1.1 m² (11.8 sq ft).

Category
Manufacturer
Year

2008, 2009, 2010, 2011, 2012

Country of manufacturing

United States

General specifications

Dimensions

Width

Height

Length

Weight

3,950 mm

~155.5 in

4,503 mm

~177.3 in

8,650 mm

~340.6 in

14,862 kg

~32,765.1 lb

Engine Power

385 hp

Emission standard level

Tier 3

Grain tank size

10,572 L

Peak unloading rate

116 L/sec

Additional specifications

Engine type

Diesel

Displacement

548 cu(in)

Fuel tank

946 L

Type of propulsion

Wheel

Drive type

Fixed or Variable

Conveyor chain slat type

Under-shot slat

Separator type

Rotary

Chaffer

1.89 sq(m)

Sieve area

4.49 sq(m)

Unloading auger length

6.86 m

Unloading rate

116 L/sec

Concave area

1.1 sq(m)

Rated power

360 hp

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John Deere 9770 STS Combine
John Deere 9770 STS Combine

10572 L

14862 kg

8650 mm × 3950 mm × 4503 mm

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2.0

Rating

Based on ratings and reviews from verified buyers.

Overall rating

1 reviews

5

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Performance & Productivity

1.0

Reliability & Durability

1.0

Comfort & Ergonomics

3.0

Safety

3.0

Technology & Features

2.0

Mark Cox
Review Dot Separator
July 2026

We came off a tired twin-rotor and the capacity jump is huge. The automation pulls real fatigue out of a long corn day. About the only downside is that it can plug in tough oats unless you back off.

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No confirmed market price is supplied for the John Deere 9770 STS. Check current listings and compare machine condition, location, and configuration.

Listed features include a rotary separator, a 10,572 L (2,792.8 US gal) grain tank, and an unloading rate of 116 L/s (1,838.6 gpm). It also has 287.1 kW (385 hp) engine power and wheel propulsion.

The 9770 STS uses a Diesel engine with 548 cu in displacement and a Tier 3 emission standard level.

The John Deere 9770 STS has 287.1 kW (385 hp) engine power. Its rated power is 268.5 kW (360 hp).

The John Deere 9770 STS uses Diesel fuel. Its fuel tank capacity is 946 L (249.9 US gal).

The supplied data identifies the John Deere 9770 STS as a combine with a rotary separator. It is suited to combine harvesting work, but the supplied information does not confirm particular crop applications or field conditions.

The supplied data does not provide an expected service life for the 9770 STS. Assess maintenance records, operating hours, engine condition, separator components, unloading system, and overall wear when evaluating a machine.

Check maintenance records, operating hours, engine operation, fuel system condition, separator and concave wear, chaffer and sieve condition, grain tank, unloading auger, conveyor chain slats, tires, and controls. Confirm that all functions operate correctly during an inspection.