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John Deere 9660 WTS specifications

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Short answer

John Deere 9660 WTS: combine harvester.

Selected configuration figures
ConfigurationDocumented field and quantity
9660 WTS
Power
305 hp
Operating Weight W/O Attachment
30,027 lb
9660 WTS specification matrix — Engine
Specification9660 WTS
Number Of Cylinders6
Power305 hp
Power Boost Power338 hp
Power Measured @2,200 rpm
Displacement494.3 cu in
Operational
Specification9660 WTS
Operating Weight W/O Attachment30,027 lb
Fuel Capacity184.2 gal
Feeding
Specification9660 WTS
Conveyor Width65.6 in
Conveyor Length78 in
Conveyor Speed520 rpm
Threshing
Specification9660 WTS
Rotor Diameter26 in
Rotor Length65.8 in
Rotor Speed - Low240 rpm
Rotor Speed - High990 rpm
Concave Area1,938 in2
Beater Grate Area775.1 in2
Separating
Specification9660 WTS
Separator Type6 walker + power separator
Separator Length181.2 in
Separating Area11,935 in2
Cleaning System
Specification9660 WTS
Total Cleaning Area7,719 in2
Cleaning Fan Speed - Low750 rpm
Cleaning Fan Speed - High1,600 rpm
Grain Handling
Specification9660 WTS
Grain Tank Capacity312.2 bu
Unloading Auger Length21.4 ft
Unloading Speed2.2 bu/sec
Unloading Discharge Height14.2 ft
Ratios
Figure9660 WTS
Engine horsepower per 1,000 lb of weight10.2
Fuel tank per engine horsepower0.60 gal

John Deere 9660 WTS: combine harvester

Where the 9660 WTS ranks in John Deere's list — Scope of the captured comparison
BrandEquipment groupCompared entrySort order
John Deerecombine harvester9660 WTSDescending quantity; 1 is largest
Figure9660 WTSRankLowest in lineHighest in line
Engine power305.0 hp2 of 6218.6 hp440.0 hp
Listed weight30,027 lb3 of 624,758 lb36,114 lb
Fuel capacity184.2 gal4 of 6100.4 gal305.2 gal
Horsepower per 1,000 lb10.2 hp2 of 68.8 hp12.2 hp

The 9660 WTS beside its neighbours

Base version8820 Titan II9660 WTS
Engine power225 hp305 hp
Weight25,486 lb30,027 lb
Fuel capacity100.4 gal184.2 gal
Wheelbase8820 Titan II: 12.47 ft

9660 WTS: forum references

Related discussion: “JD 9660i”: 9660 STS to S660.

Used market for the 9660 WTS — Dated first-page listing snapshot
Observation dateListing sourceEquipment searchListings
2026-09-24TractorHouseJohn Deere combine harvester1
ModelListedModel yearsLowest askingHighest askingMedian askingMedian hours
9660 WTS12003$50,101$50,101$50,101None shown
9660 WTS: recall reference — Dated CPSC search
Search dateDatabaseNames queriedSearch result
2026-09-24U.S. Consumer Product Safety CommissionJohn Deere together with the combine harvester 9660 WTSNo matching recall in this search

Sources for this page

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

John Deere 9660 WTS: Configuration records

9660 WTS
SpecificationSource figure
Engine
Number Of Cylinders6
Power305 hp
Power Boost Power338 hp
Displacement494.3 cu in
Power Measured @2,200 rpm
Operational
Operating Weight W/O Attachment30,027 lb
Fuel Capacity184.2 gal
Threshing
Rotor Diameter26 in
Rotor Speed - Low240 rpm
Rotor Speed - High990 rpm
Concave Area1,938 in2
Rotor Length65.8 in
Beater Grate Area775.1 in2
Cleaning System
Total Cleaning Area7,719 in2
Cleaning Fan Speed - Low750 rpm
Cleaning Fan Speed - High1,600 rpm
Grain Handling
Grain Tank Capacity312.2 bu
Unloading Speed2.2 bu/sec
Unloading Auger Length21.4 ft
Unloading Discharge Height14.2 ft
Separating
Separator Type6 walker + power separator
Separator Length181.2 in
Separating Area11,935 in2
Feeding
Conveyor Width65.6 in
Conveyor Length78 in
Conveyor Speed520 rpm

Source

More in John Deere: 9870–S690, 9570 STS/S550, 9550/9560 STS/9750 STS specs.