John Deere 9770 STS Combines
John Deere 9770 STS



5+
sold in last yearGeneral 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).
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
John Deere 9770 STS Combines Listings
Looking for John Deere 9770 STS Combines?
See similar listingsCompare John Deere 9770 STS Combine to other combines
Not sure which equipment to choose? Use our comparison tool to easily compare equipment side by side based on key features.
Add model
Add model
2.0
Rating
Based on ratings and reviews from verified buyers.
Overall rating
1 reviews
5
4
3
2
1
Performance & Productivity
1.0
Reliability & Durability
1.0
Comfort & Ergonomics
3.0
Safety
3.0
Technology & Features
2.0
Mark Cox

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.
No questions yet
Be the first to ask a question about this model and help other buyers learn more.
Heavy equipment insights from JumboBee
October 5, 2026
How to Choose the Right Excavator Bucket: Types, Sizes, and Contractor Buying Guide
This guide covers excavator bucket types, capacities, compatibility, and how to choose the right bucket for your jobsite.
September 28, 2026
Mini Excavator Buying Guide 2026: Best Models, Sizes and How to Choose
This guide breaks down everything you need to know about compact earthmoving equipment.
September 21, 2026
Types of Forklifts: Complete Guide to Classes, Uses, and Applications
This guide covers official forklift classes, physical machine variations, and load capacities.
October 9, 2026
Motor Grader Buying Guide: Sizes, Top Brands, and What Contractors Should Look For
This guide helps buyers select the right motor grader for their needs and maximize ROI across construction, mining, and snow removal.
August 25, 2026
Repair, Rebuild or Replace Heavy Equipment: 2026 Cost-Based Decision Guide
This guide provides a mathematical approach to help you decide what to do with your aging machinery in 2026.
July 31, 2026
How to Inspect Used Heavy Equipment Remotely: Practical Checklist for International Buyers
This article provides a practical, step-by-step guide for evaluating machinery without physical access.
Got Questions?
Our FAQ section covers everything from shipping and listing to buying with confidence.
Can't find what you're looking for?
Sign up and talk to an expert.
Most popular
What is the average price of a John Deere 9770 STS?
No confirmed market price is supplied for the John Deere 9770 STS. Check current listings and compare machine condition, location, and configuration.
What are the key advantages of the John Deere 9770 STS?
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.
What type of engine does the 9770 STS use?
The 9770 STS uses a Diesel engine with 548 cu in displacement and a Tier 3 emission standard level.
How much horsepower does the 9770 STS have?
The John Deere 9770 STS has 287.1 kW (385 hp) engine power. Its rated power is 268.5 kW (360 hp).
What fuel does the John Deere 9770 STS use?
The John Deere 9770 STS uses Diesel fuel. Its fuel tank capacity is 946 L (249.9 US gal).
What jobs is this Combines best suited for?
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.
What is the expected lifespan of the 9770 STS?
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.
What should a buyer check when purchasing a used Combines?
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.











