Farmall 666

Farmall 666 tractor photo
1972 - 1976

Note: the Farmall model 666 is the same as the International Harvester 666. The following data is from the 666 listing.
ManufacturerFarmall (a part of International Harvester)
Total built9,367
Original price$11,875
Farmall 666 Engines
International Harvester 5.1L 6-cyl diesel
International Harvester 4.8L 6-cyl gasoline
Engine details ...
Farmall 666 Transmissions
10-speed partial power shift
Transmission details ...
Farmall 666 Power
Drawbar (tested)58.01 hp
43.3 kW
PTO (tested)69.61 hp
51.9 kW
Performance test details ...
Two-wheel drive
Steeringhydrostatic power
Dry disc brakes
Open operator station. Two-post ROPS or canpoy optional.
Tractor hitch
Rear TypeII
TypeIH Fast Hitch
Power Take-off (PTO)
Rear PTOindependent
Rear PTO Type540
Dimensions & Tires
Wheelbase103 inches
261 cm
Weight7053 lbs
3199 kg
Front tire7.50-16
Rear tire15.5-38
Full dimensions and tires ...
666 Serial Numbers
Location:Clutch housing, right side

FAQ: How to read a serial number table.
Page information
Peter Easterlund - owner of
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TractorData is a family-owned small business located in Minnesota that has been providing reference information on tractors since 1999.
Peter Easterlund - owner/author
Updated on September 23, 2023
©2000-2023 -®. Notice: Every attempt is made to ensure the data listed is accurate. However, differences between sources, incomplete listings, errors, and data entry mistakes do occur. Consult official literature from the manufacturer before attempting any service or repair.