Wikitractor

Farmall 666

Production ended · 2WD

PTO power

65 hp

Weight
6,780 lb
Engines
2 Diesel · Gasoline
Built
9,367
Price new
no record

Power

Engine75 hp gross
PTO65 hp claimed; gear
PTO, tested69.6 hp
Drawbar57 hp claimed; gear
Drawbar, tested58 hp
Listed power75 hp engine basis

Engines

International Harvester 5.1L 6-cyl dieselDiesel · 6 cyl312 ci
International Harvester 4.8L 6-cyl gasolineGasoline · 6 cyl291 ci
Engine details
International Harvester 5.1L 6-cyl diesel
Bore × stroke
3.88 in × 4.41 in
Rated speed
2,000 rpm
Rated power
75 hp
Compression
17:1
Cooling
liquid-cooled
International Harvester 4.8L 6-cyl gasoline
Bore × stroke
3.75 in × 4.39 in
Rated speed
2,000 rpm
Rated power
75 hp
Compression
7.5:1
Cooling
liquid-cooled

Transmissions

sliding gear5F / 1R
hydrostatichydrostaticinfinite forward and reverse
Torque-Amplifiertwo-speed power shift10F / 2R

Weight

Weight6,780 lb shipping
Shipping6,780 lb

Dimensions

Wheelbase103 in
Length161 in
Width87 in
Front axle clearance21 in
Front tread, narrowest50 in
Front tread, widest74 in
Rear tread, narrowest50 in
Rear tread, widest96 in

Capacities

Fuel tank33 gal

Hydraulics

Systemopen center
Pump flow12 gpm

Hitch

Rear hitch categoryII
Hitch typeIH Fast Hitch
Rear lift capacityno record

PTO

Rear PTOindependent
Rear PTO speeds540 (1.375)

Chassis

Drive2WD
SteeringPower steering
BrakesDry disc brakes
CabOpen operator station. Two-post ROPS or canopy optional. Cab available with air-conditioning

Tires

Front7.50-16
Rear15.5-38

Electrical

System voltage12 V
Chargingalternator

Production

Total built9,367
FactoriesRock Island, Illinois, USA
Built byFarmall (a part of International Harvester)

Serial numbers

Clutch housing, right side

YearFirst serial
19727500
19738200
197411585
197513131
197615739

Literature

  • Farm Equipment Reference Catalog International Harvester, 1972