Compare/Farmall 706 vs Farmall 766

Farmall 706 vs Farmall 766

Verdict: Farmall 706 vs Farmall 766

The Farmall 706 and the Farmall 766 are both tractors — here is how they stack up on the figures that matter. Farmall 706 leads on rated power with 89 hp against 80 hp. Farmall 766 is the lighter machine (4,672 kg vs 7,530 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. In short: choose the Farmall 706 for outright pulling power, or the Farmall 766 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

Tune the fit score

Tell us about your operation

Acreage600 acBudgetMain crop / use

Fit & specs

Farmall

Fit score

Best match

Clear

Farmall

Fit score

Best match

Clear

Rated power

89 hp

80 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

Farmall (a part of International Harvester)Reference

The Torque Amplifier (TA) provides a hydraulically-actuted under-drive that may be shifted, on the move, with any range and speed selection in the main transmission. Using the TA does not require the clutch or stopping the tractor. With the lever in the forward position, the TA is disengaged and the transmission is in direct drive. To slow the tractor (increasing pulling power) the TA lever should be pulled smoothly and quickly to the rear, engaging the TA. To disengage the TA and return to direct-drive, the TA should be moved forward, with a slight pause at the center position of the lever.Reference

Four gears (1-4) in two ranges (low/high) with the Torque Amplifer (TA) power shift. The TA allows a shift-on-the-move between direct drive and a lower speed.Reference

Total built

45,053Reference

10,799Reference

Variants

Farmall 706

row-cropReference

—

IH 706

standard-treadReference

—

IH 2706

industrialReference

—

706 Hi-Clear

high-cropReference

—

Engine

Engine (gross)

66.4 kWReference

—

Drawbar (claimed)

48.5 kWReference

—

Drawbar (tested)

50.3 kWReference

54.7 kWReference

Displacement

4.8 LReference

5.9 LReference

Bore/Stroke

95 x 112 mmReference

98 x 129 mmReference

Power (gross)

66.4 kWReference

—

Air cleaner

dual stage dryReference

Rated RPM

2300Reference

2400Reference

Idle RPM

900-2300Reference

—

Firing order

1-5-3-6-2-4Reference

—

Starter volts

12Reference

Coolant capacity

19.9 LReference

—

Intake valve clearance

0.686 mmReference

—

Exhaust valve clearance

0.686 mmReference

—

Oil capacity

64.4 LReference

—

Sparkplug gap

0.381 mmReference

—

Point gap

0.508 mmReference

—

Compression

7.5:1Reference

17:1Reference

Power at rated engine speed

57.1 kWReference

63.7 kWReference

Max power

49.0 kWReference

54.7 kWReference

Fuel tank

—

140.0 LReference

Transmission

Torque AmplifierReference

Gears

16 forward and 8 reverseReference

Clutch

12-inch dry discReference

dry discReference

Oil type

IH Hy-TranReference

—

PTO & Hydraulics

PTO (claimed)

54.8 kWReference

—

PTO (tested)

57.1 kWReference

63.7 kWReference

Hydraulic system

64.3 LReference

—

Type

IH Fast HitchReference

two-speed power shiftReference

Capacity

64.3 LReference

—

Valves

1 or 2Reference

—

Pump flow

11.4 lpmReference

45.4 lpmReference

Steering flow

34.1 lpmReference

—

Rear Type

2Reference

Rear PTO

independentReference

Rear PTO Type

1000Reference

540/1000Reference

Engine RPM

1000@2100Reference

—

Power at rated PTO speed

53.5 kWReference

63.9 kWReference

Capacities

Fuel

147.6 LReference

—

Diameter

27 cmReference

—

Width

279 cmReference

248 cmReference

RPM

1055Reference

—

Speed

925.98 meters/minReference

—

Dimensions

2WD Wheelbase

247 cmReference

—

4WD Wheelbase

240 cmReference

—

Weight

7530 to 9160 poundsReference

4672 kgReference

Front tire

6.50-16Reference

9.5L-15Reference

Rear tire

15.5-38Reference

18.4-34Reference

2WD Ag front

6.50-16Reference

—

4WD Ag front

11.2-24Reference

—

Ag rear

15.5-38Reference

18.4-34Reference

2WD Length

398 cmReference

—

4WD Length

408 cmReference

—

2WD Height (steering wheel)

203 cmReference

—

4WD Height (steering wheel)

207 cmReference

—

Ground clearance

43 cmReference

—

2WD Clearance (front axle)

53 cmReference

—

2WD Clearance (drawbar)

33 cmReference

—

Front tread

142 to 203 cmReference

152 to 213 cmReference

Rear tread

142 to 243 cmReference

142 to 254 cmReference

Shipping

3529 kgReference

—

Operating

4154 kgReference

—

Ballasted

4858 kgReference

—

Wheelbase

—

266 cmReference

Ag front

—

9.5L-15Reference

Length

—

419 cmReference

Height (exhaust)

—

266 cmReference

Operating weight

—

4672 kgReference

Ballasted weight

—

5388 kgReference

Clearance (drawbar)

—

35 cmReference

Farmall 706 attachments

706 Serial Number Location

706 Serial Numbers

1963

501Reference

—

1964

7073Reference

—

1965

21162Reference

—

1966

30288Reference

—

1967

38521Reference

—

Final

46647Reference

—

Electrical

Ground

negativeReference

—

Charging amps

32 (alternator)Reference

—

Batteries

2 (diesel)Reference

—

Battery volts

6 (diesel)Reference

—

Battery AH

130 (diesel)Reference

—

Test results

Fuel use

22.0 l/hourReference

23.1 l/hourReference

Max pull

3804 kgReference

4189 kgReference

Speeds

766 Serial Number Location

766 Serial Numbers

1971

—

7101Reference

1972

—

7416Reference

1973

—

9611Reference

1974

—

12378Reference

1975

—

14630Reference

1976

—

16840Reference

Fit score weighs budget, operation size, crop match and data confidence against the details above. It’s guidance, not advice — always confirm with a dealer demo.