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International HarvesterUSACatalog archive

International Harvester 1066

Production years: 1971–1976 • Assembly plant: Rock Island, Illinois (Farmall Works), USA

Compare with other modelsValue machine
Engine horsepower
140 HP
PTO: 125.68 HP
Displacement
6.8 L
6-cylinder engine
Drive and chassis
4WD
Gear (16F/8R)
Operating weight
N/A
—

Sources and field evidence

Catalog Archive: Baseline specifications compiled from historical manufacturer archives and equipment registries. Laboratory test report verification in progress.

International Harvester 1066 - Farmall 1066 Hydro tractor MD1
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International Harvester 1066 - Farmall 1066 Hydro tractor MD1
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Engineering & Capability Benchmark

Specific output, tractive ratio, and segment percentile

Row-Crop / Mid-Range Field
Global Tractor Fleet Power SpectrumTop 52% of all indexed machinery
Compact (20 HP)Utility (100 HP)Row-Crop (250 HP)Titans (600+ HP)
Specific Output
20.6 HP/L
Turbocharged
Traction Ratio
—
Agile transport & crop care
PTO Efficiency
90%
125.68 PTO HP rated
Hydraulic Flow
21 GPM
79 L/min capacity

Engine and power specifications

Engine model
International Harvester DT414
Fuel type
Diesel
Rated horsepower
140 hp
Rated PTO Power
125.68 hp (International Harvester specification)
Drawbar Power @ Rated Engine Speed
105.95 hp (Nebraska OECD Test 2218)
Cylinders
6
Displacement
6.8 L (414 ci)
Bore / stroke
4.30x4.75 inches 109 x 121 mm
Rated RPM
2400 RPM
Crankcase oil capacity
18 qts (~17.0 L)
Coolant capacity
25 qts (~23.6 L)

Maintenance picks for the 1066

Oil capacity 18 qts — match the filter before you drain.

Transmission and chassis specifications

Transmission type
Gear (16F/8R)
Gears (forward / reverse)
16 forward / 8 reverse
Drive system
4WD
Wheelbase
105 in
Front tire
11L-15
Rear tire
18.4-38
Hydraulic flow
21 GPM
Rear hitch
III/II
ASABE EP496 Engineering Matcher

Implement Draft & Ballast Matcher

Simulate draft resistance, drawbar power transfer, and optimal axle weight distribution for International Harvester 1066.

High Draft Working Zone(95%)
CAD DRAFT SCHEMATIC • Wide-Span Field Cultivator
SOIL: Medium Tilled LoamDEPTH: 4"SPEED: 7 MPH95% LOAD
SOIL SURFACE (0.0")SUB-SURFACE PLOW PAN (~14")140 HP◄ 5,563 LBS DRAFT4" DEPTH
DRAWBAR DEMAND: 103.8 HPWIDTH / SIZE: 32 ft Width
ASABE D497.7 Tillage Specific Resistance Formula
Implement Size (ft Width)32 ft Width
18 ft WidthDefault: 4270 ft Width
Tillage / Seeding Depth4 inches (10 cm)
2"Target: 4"6"
Target Operating Field Speed7.0 mph (11.3 km/h)
5 mphRated: 7 mph9 mph
Engine Power Demand vs Rated Output133.1 HP / 140 HP Rated
0%55% (Min Load)60-85% (Sweet Spot)100% (Cap)
Draft Force
5,563 lbs
Drawbar Power
103.8 HP
Target Slip
8% - 12%
Axle Ballast Balance (MFWD / Mechanical Front Assist )Calibrated for Wide-Span Field Cultivator (100 lbs/HP standard)
Target: 14,000 lbs
Front Axle: 38%Rear Axle: 62%
2,413 kg (5,320 lbs)3,937 kg (8,680 lbs)
Ballast Adjustment vs Base:+700 lbs (318 kg)
Hourly Diesel Burn
5.8 gal/h
22 L/hr (est. $22/h)
Hydraulic Fan Status
Standard Draw
No fan req

Optimal engine load (95%). Tractive efficiency is peaked within standard 8% - 12% slip window.

Catalog archival serial-number ranges

6 production years
Production yearStarting serial #Ending serial #Assembly plant
1971#7,101#12,676Rock Island, Illinois (Farmall Works), USA
1972#12,677#24,204Rock Island, Illinois (Farmall Works), USA
1973#24,205#34,948Rock Island, Illinois (Farmall Works), USA
1974#34,949#46,854Rock Island, Illinois (Farmall Works), USA
1975#46,855#56,671Rock Island, Illinois (Farmall Works), USA
1976#56,672End of runRock Island, Illinois (Farmall Works), USA

Instant Used Market Valuation Projector

Algorithmic resale estimate for International Harvester 1066 (1971)

Full Appraisal Tool
Operating Meter Hours3,200 hrs
Mechanical & Physical Condition
Empirical model calibrated against dealer & auction lots
Estimated Fair Market Value
$6,291
Basis: 140 HP • 55 yrs old
Auction / Wholesale
$5,159 – $5,788
Dealer Retail Asking
$6,606 – $7,423
3-Year Projected Resale Curve~5% annual retention decay
Year 2027
$5,976
Year 2028
$5,678
Year 2029
$5,394

Direct Segment Rivals & Showdowns

Head-to-head match-ups calibrated by horsepower and era

White+21 HP
2-150
161 HP
Case+21 HP
1470
161 HP

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International Harvester

USA • 253 Models

The International Harvester Company (IH or International) was a pioneering American industrial powerhouse founded in 1902 through the merger of five leading agricultural equipment manufacturers, including the McCormick Harvesting Machine Company and Deering Harvester Company. This strategic consolidation created one of the largest agricultural machinery manufacturers in the world, with an immediate impact on the industry. International Harvester quickly became renowned for its innovative Farmall tractors, which revolutionized farming practices with their versatility and efficiency. The company's product line expanded to include the iconic Cub Cadet tractors, as well as the consolidated McCormick-Deering line that carried forward the legacy of its founding companies. Beyond its dominance in the agricultural sector, International Harvester was a major player in commercial vehicles, producing the popular Scout and Travelall automobiles, along with a wide range of trucks. The company's diverse portfolio also included lawn and garden equipment and household appliances, making it a household name across America. However, the 1980s brought significant challenges as the company faced financial difficulties. In response, International Harvester began divesting its divisions, starting with the sale of its construction equipment division to Dresser Industries in 1982. The pivotal moment came in 1984 when the farm equipment division was acquired by Tenneco's subsidiary, Case Corporation, leading to the formation of the Case IH brand. Today, Case IH is part of CNH Industrial, while the European division lives on as McCormick Tractors, owned by Italy's ARGO SpA. By 1986, International Harvester had transformed into Navistar International, focusing exclusively on trucks and engines.

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