John Deere 9660 STS Combines
John Deere 9660 STS
Average price
$36,471.43




5+
sold in last yearGeneral 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.
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
$45,900
4.58 sq(m)
8810 L
305 hp
4062 hours
Warsaw, United States
$49,500
8810 L
496 cu(in)
305 hp
3469 hours
Monticello, United States
$33,500
8810 L
78 L/sec
4.58 sq(m)
4670 hours
Holland, United States
$25,900
8810 L
305 hp
945 L
4008 hours
Assumption, United States
Compare John Deere 9660 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
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

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.
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.
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.
July 10, 2026
New vs Used Heavy Equipment in 2026: Cost, Risk, ROI & When Each Option Wins
This guide explores new vs. used machinery investments, from costs and risks to financing and ROI.
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 9660 STS?
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.
What are the key advantages of the John Deere 9660 STS?
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.
What type of engine does the 9660 STS use?
The John Deere 9660 STS uses a Diesel engine with 496 cu in displacement.
How much horsepower does the 9660 STS have?
The 9660 STS has 338 hp engine power and 305 hp rated power.
What fuel does the John Deere 9660 STS use?
The John Deere 9660 STS uses Diesel fuel.
What jobs is this Combines best suited for?
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.
What is the expected lifespan of the 9660 STS?
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.
What should a buyer check when purchasing a used Combines?
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.











































































