FieldSpec
Equipment menu

Machine models

John Deere 9660 STS to S660 specifications

Entries in this reference
Listing-entry count
6
Short answer

John Deere 9660 STS to S660: combine harvesters.

Selected configuration figures
ConfigurationDocumented field and quantity
9660 STS
Power
304.5 hp
Operating Weight W/O Attachment
30,682 lb
9670 STS
Power
305 hp
Operating Weight W/O Attachment
32,662 lb
9760 STS
Power
339.3 hp
Unloading Auger Length
22.7 ft
9770 STS
Power
360 hp
Operating Weight W/O Attachment
32,765 lb
9860 STS
Power
374.2 hp
Unloading Auger Length
22.7 ft
S660
Power Boost Power
25 hp
Separator Length
123 in
9660 STS to S660 specification matrix — Listing labels reported by the source
Publisher nameSource guideListing-entry countLabels named by the source
John Deere9660 STS to S66069660 STS, 9670 STS, 9760 STS, 9770 STS, 9860 STS, and S660
Engine
Specification9660 STS9670 STS9760 STS9770 STS9860 STSS660
Number Of Cylinders666666
Power304.5 hp305 hp339.3 hp360 hp374.2 hp239 hp
Power Boost Power338 hp338 hp372.9 hp385 hp407.7 hp25 hp
Power Measured @2,200 rpm2,200 rpm2,200 rpm2,200 rpm2,200 rpm2,200 rpm
Displacement494.3 cu in549.3 cu in494.3 cu in549.3 cu in762.8 cu in9 cu in
SpecificationS660
Engine ModelJohn Deere 6 cyl. 9.0 L
Operational
Specification9660 STS9670 STS9770 STS
Operating Weight W/O Attachment30,682 lb32,662 lb32,765 lb
Specification9660 STS9670 STS9760 STS9770 STS9860 STSS660
Fuel Capacity249.7 gal249.7 gal249.7 gal249.7 gal305.2 gal950 gal
Feeding
Specification9660 STS9670 STS9760 STS9770 STS9860 STSS660
Conveyor Width55 in55 in55 in55 in55 in1,397 in
Conveyor Length68 in68 in68 in68 in68 in1,727 in
Specification9660 STS9760 STS9860 STS
Conveyor Speed520 rpm520 rpm520 rpm
Threshing
Specification9660 STS9670 STS9760 STS9770 STS9860 STSS660
Rotor Diameter29.6 in29.6 in29.6 in29.6 in29.6 in762 in
Rotor Length123.3 in123.3 in123.3 in123.3 in123.3 in3,124 in
Rotor Speed - Low210 rpm210 rpm210 rpm210 rpm210 rpm210 rpm
Rotor Speed - High1,000 rpm1,000 rpm1,000 rpm1,000 rpm1,000 rpm1,000 rpm
Concave Area1,705 in21,705 in21,705 in21,705 in21,705 in21.1 in2
Separating
Specification9660 STS9670 STS9760 STS9770 STS9860 STSS660
Separator TypeRotaryrotaryRotaryrotaryRotaryRotary
Separating Area2,387 in22,387 in22,387 in22,387 in22,387 in21.6 in2
Discharge Grate Area558.1 in2558.1 in2558.1 in2558.1 in2558.1 in20.4 in2
SpecificationS660
Separator Length123 in
Cleaning System
Specification9660 STS9670 STS9760 STS9770 STS9860 STSS660
Total Cleaning Area7,099 in26,960 in27,099 in26,960 in27,099 in24.9 in2
Cleaning Fan Speed - Low500 rpm620 rpm500 rpm620 rpm500 rpm620 rpm
Cleaning Fan Speed - High1,200 rpm1,200 rpm1,200 rpm1,200 rpm1,200 rpm1,350 rpm
Grain Handling
Specification9660 STS9670 STS9760 STS9770 STS9860 STSS660
Grain Tank Capacity249.8 bu249.8 bu300.9 bu300.9 bu300.9 bu10600 bu
Unloading Auger Length21.4 ft21.5 ft22.7 ft21.5 ft22.7 ft22.5 ft
Unloading Speed2.2 bu/sec2.2 bu/sec3.4 bu/sec3.3 bu/sec3.4 bu/sec120 bu/sec
Unloading Discharge Height14.3 ft14.3 ft14.4 ft14.3 ft14.4 ft7.9 ft
Variants — Source comparison annotation
Source guideDiffering-field count reported
9660 STS to S66023
Ratios
Figure9660 STS9670 STS9770 STS
Engine horsepower per 1,000 lb of weight9.99.311.0
Figure9660 STS9670 STS9760 STS9770 STS9860 STSS660
Fuel tank per engine horsepower0.82 gal0.82 gal0.74 gal0.69 gal0.82 gal3.97 gal

John Deere 9660 STS to S660: combine harvester

9660 STS to S660: forum references — Forum-title search
Forum indexEquipment class queriedNames in the searchMatching titles
The Farming Forumcombine harvesterJohn Deere and the 9660, 9770 line that the 9660 STS, 9770 STS belongs to (no title names the exact model). That is too few titles to say what owners mostly ask about, so the most recent are listed instead2
  • JD 9660i (The Farming Forum, 2022-08-19)
Used market for the 9660 STS to S660 — Dated first-page listing snapshot
Observation dateListing sourceEquipment searchListings
2026-09-24TractorHouseJohn Deere combine harvester288
ModelListedModel yearsLowest askingHighest askingMedian askingMedian hours
9660 STS442003 to 2007$27,500$65,000$43,9002,860
9670 STS522008 to 2011$49,900$124,000$75,5002,023
9760 STS382003 to 2007$29,500$89,900$46,500None shown
9770 STS712008 to 2011$35,000$128,500$75,0002,451
9860 STS212003 to 2007$20,562$59,900$34,8854,631
S660622012 to 2017$74,500$159,000$104,5001,989
9660 STS to S660: recall reference — Dated CPSC search
Search dateDatabaseNames queriedSearch result
2026-09-24U.S. Consumer Product Safety CommissionJohn Deere together with the combine harvester 9660 STS, 9670 STS, 9760 STS, 9770 STSNo matching recall in this search

Sources for this page

Evidence classDocument, classification and recorded date
Reference site
Reference site
Reference site
Reference site
Reference site
Reference site
Forum threads
Used-market listings
Federal agency data

John Deere 9660 STS to S660: Configuration records

9660 STS
SpecificationSource figure
Engine
Number Of Cylinders6
Power304.5 hp
Power Boost Power338 hp
Displacement494.3 cu in
Power Measured @2,200 rpm
Operational
Operating Weight W/O Attachment30,682 lb
Fuel Capacity249.7 gal
Threshing
Rotor Diameter29.6 in
Rotor Speed - Low210 rpm
Rotor Speed - High1,000 rpm
Concave Area1,705 in2
Rotor Length123.3 in
Cleaning System
Total Cleaning Area7,099 in2
Cleaning Fan Speed - Low500 rpm
Cleaning Fan Speed - High1,200 rpm
Grain Handling
Grain Tank Capacity249.8 bu
Unloading Speed2.2 bu/sec
Unloading Auger Length21.4 ft
Unloading Discharge Height14.3 ft
Separating
Separator TypeRotary
Separating Area2,387 in2
Discharge Grate Area558.1 in2
Feeding
Conveyor Width55 in
Conveyor Length68 in
Conveyor Speed520 rpm

Source

9670 STS
SpecificationSource figure
Engine
Number Of Cylinders6
Power305 hp
Power Boost Power338 hp
Displacement549.3 cu in
Power Measured @2,200 rpm
Operational
Operating Weight W/O Attachment32,662 lb
Fuel Capacity249.7 gal
Threshing
Rotor Diameter29.6 in
Rotor Speed - Low210 rpm
Rotor Speed - High1,000 rpm
Concave Area1,705 in2
Rotor Length123.3 in
Cleaning System
Total Cleaning Area6,960 in2
Cleaning Fan Speed - Low620 rpm
Cleaning Fan Speed - High1,200 rpm
Grain Handling
Grain Tank Capacity249.8 bu
Unloading Speed2.2 bu/sec
Unloading Auger Length21.5 ft
Unloading Discharge Height14.3 ft
Separating
Separator Typerotary
Separating Area2,387 in2
Discharge Grate Area558.1 in2
Feeding
Conveyor Width55 in
Conveyor Length68 in

Source

9760 STS
SpecificationSource figure
Engine
Number Of Cylinders6
Power339.3 hp
Power Boost Power372.9 hp
Displacement494.3 cu in
Power Measured @2,200 rpm
Operational
Fuel Capacity249.7 gal
Threshing
Rotor Diameter29.6 in
Rotor Speed - Low210 rpm
Rotor Speed - High1,000 rpm
Concave Area1,705 in2
Rotor Length123.3 in
Cleaning System
Total Cleaning Area7,099 in2
Cleaning Fan Speed - Low500 rpm
Cleaning Fan Speed - High1,200 rpm
Grain Handling
Grain Tank Capacity300.9 bu
Unloading Speed3.4 bu/sec
Unloading Auger Length22.7 ft
Unloading Discharge Height14.4 ft
Separating
Separator TypeRotary
Separating Area2,387 in2
Discharge Grate Area558.1 in2
Feeding
Conveyor Width55 in
Conveyor Length68 in
Conveyor Speed520 rpm

Source

9770 STS
SpecificationSource figure
Engine
Number Of Cylinders6
Power360 hp
Power Boost Power385 hp
Displacement549.3 cu in
Power Measured @2,200 rpm
Operational
Operating Weight W/O Attachment32,765 lb
Fuel Capacity249.7 gal
Threshing
Rotor Diameter29.6 in
Rotor Speed - Low210 rpm
Rotor Speed - High1,000 rpm
Concave Area1,705 in2
Rotor Length123.3 in
Cleaning System
Total Cleaning Area6,960 in2
Cleaning Fan Speed - Low620 rpm
Cleaning Fan Speed - High1,200 rpm
Grain Handling
Grain Tank Capacity300.9 bu
Unloading Speed3.3 bu/sec
Unloading Auger Length21.5 ft
Unloading Discharge Height14.3 ft
Separating
Separator Typerotary
Separating Area2,387 in2
Discharge Grate Area558.1 in2
Feeding
Conveyor Width55 in
Conveyor Length68 in

Source

9860 STS
SpecificationSource figure
Engine
Number Of Cylinders6
Power374.2 hp
Power Boost Power407.7 hp
Displacement762.8 cu in
Power Measured @2,200 rpm
Operational
Fuel Capacity305.2 gal
Threshing
Rotor Diameter29.6 in
Rotor Speed - Low210 rpm
Rotor Speed - High1,000 rpm
Concave Area1,705 in2
Rotor Length123.3 in
Cleaning System
Total Cleaning Area7,099 in2
Cleaning Fan Speed - Low500 rpm
Cleaning Fan Speed - High1,200 rpm
Grain Handling
Grain Tank Capacity300.9 bu
Unloading Speed3.4 bu/sec
Unloading Auger Length22.7 ft
Unloading Discharge Height14.4 ft
Separating
Separator TypeRotary
Separating Area2,387 in2
Discharge Grate Area558.1 in2
Feeding
Conveyor Width55 in
Conveyor Length68 in
Conveyor Speed520 rpm

Source

S660
SpecificationSource figure
Engine
Number Of Cylinders6
Engine ModelJohn Deere 6 cyl. 9.0 L
Power Boost Power25 hp
Displacement9 cu in
Power Measured @2,200 rpm
Operational
Fuel Capacity950 gal
Threshing
Rotor Diameter762 in
Rotor Speed - Low210 rpm
Rotor Speed - High1,000 rpm
Concave Area1.1 in2
Rotor Length3,124 in
Cleaning System
Total Cleaning Area4.9 in2
Cleaning Fan Speed - Low620 rpm
Cleaning Fan Speed - High1,350 rpm
Grain Handling
Grain Tank Capacity10600 bu
Unloading Speed120 bu/sec
Unloading Auger Length22.5 ft
Unloading Discharge Height7.9 ft
Separating
Separator TypeRotary
Separator Length123 in
Separating Area1.6 in2
Discharge Grate Area0.4 in2
Feeding
Conveyor Width1,397 in
Conveyor Length1,727 in

Source

Compare John Deere 9660 STS, 9670 STS, 9760 STS, 9770 STS, 9860 STS, S660
Engine
Specification9660 STS9670 STS9760 STS9770 STS9860 STSS660
Number Of Cylinders666666
Power Boost Power338 hp338 hp372.9 hp385 hp407.7 hp25 hp
Power Measured @2,200 rpm2,200 rpm2,200 rpm2,200 rpm2,200 rpm2,200 rpm
Displacement494.3 cu in549.3 cu in494.3 cu in549.3 cu in762.8 cu in9 cu in
Operational
Specification9660 STS9670 STS9760 STS9770 STS9860 STSS660
Fuel Capacity249.7 gal249.7 gal249.7 gal249.7 gal305.2 gal950 gal
Feeding
Specification9660 STS9670 STS9760 STS9770 STS9860 STSS660
Conveyor Width55 in55 in55 in55 in55 in1,397 in
Conveyor Length68 in68 in68 in68 in68 in1,727 in
Threshing
Specification9660 STS9670 STS9760 STS9770 STS9860 STSS660
Rotor Diameter29.6 in29.6 in29.6 in29.6 in29.6 in762 in
Rotor Length123.3 in123.3 in123.3 in123.3 in123.3 in3,124 in
Rotor Speed - Low210 rpm210 rpm210 rpm210 rpm210 rpm210 rpm
Rotor Speed - High1,000 rpm1,000 rpm1,000 rpm1,000 rpm1,000 rpm1,000 rpm
Concave Area1,705 in21,705 in21,705 in21,705 in21,705 in21.1 in2
Separating
Specification9660 STS9670 STS9760 STS9770 STS9860 STSS660
Separator TypeRotaryrotaryRotaryrotaryRotaryRotary
Separating Area2,387 in22,387 in22,387 in22,387 in22,387 in21.6 in2
Discharge Grate Area558.1 in2558.1 in2558.1 in2558.1 in2558.1 in20.4 in2
Cleaning System
Specification9660 STS9670 STS9760 STS9770 STS9860 STSS660
Total Cleaning Area7,099 in26,960 in27,099 in26,960 in27,099 in24.9 in2
Cleaning Fan Speed - Low500 rpm620 rpm500 rpm620 rpm500 rpm620 rpm
Cleaning Fan Speed - High1,200 rpm1,200 rpm1,200 rpm1,200 rpm1,200 rpm1,350 rpm
Grain Handling
Specification9660 STS9670 STS9760 STS9770 STS9860 STSS660
Grain Tank Capacity249.8 bu249.8 bu300.9 bu300.9 bu300.9 bu10600 bu
Unloading Auger Length21.4 ft21.5 ft22.7 ft21.5 ft22.7 ft22.5 ft
Unloading Speed2.2 bu/sec2.2 bu/sec3.4 bu/sec3.3 bu/sec3.4 bu/sec120 bu/sec
Unloading Discharge Height14.3 ft14.3 ft14.4 ft14.3 ft14.4 ft7.9 ft

More in John Deere: 9570 STS/S550, 8820 Titan II, 9660 WTS.