Compare/International Harvester 3688 vs International Harvester A-986

International Harvester 3688 vs International Harvester A-986

Verdict: International Harvester 3688 vs International Harvester A-986

The International Harvester 3688 and the International Harvester A-986 are both tractors — here is how they stack up on the figures that matter. International Harvester A-986 leads on rated power with 115 hp against 114 hp. International Harvester A-986 is the lighter machine (5,533 kg vs 11,300 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. International Harvester 3688 is the newer design (1981 vs 1978). In short: choose the International Harvester A-986 for outright pulling power, or the International Harvester 3688 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

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Acreage600 acBudgetMain crop / use

Fit & specs

International Harvester

Fit score

Best match

Clear

International Harvester

Fit score

Best match

Clear

Rated power

114 hp

115 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

International HarvesterReference

With 18.4-34R1 rear tires.Reference

liquid-cooled inlineReference

Total built

2,572Reference

492Reference

Final drives

bull gearReference

Differential lock

rearReference

electro-hydraulic rearReference

Variants

3688 Hi-Clear

high-clearance modelReference

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Engine

Drawbar (claimed)

74.7 kWReference

76.8 kWReference

Drawbar (tested)

74.0 kWReference

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Displacement

7.1 LReference

5.9 LReference

Bore/Stroke

109 x 127 mmReference

98 x 129 mmReference

Air cleaner

dual dry elmementReference

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Compression

16:1Reference

—

Rated RPM

2400Reference

2500Reference

Idle RPM

900-2400Reference

—

Starter volts

12Reference

Coolant capacity

24.6 LReference

—

Oil capacity

85.2 LReference

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Power at rated engine speed

84.8 kWReference

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Max power

74.0 kWReference

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Engine

—

99.2 kWReference

Power

—

99.2 kWReference

Torque

—

450.2 NmReference

Torque RPM

—

1600Reference

Starter

—

electricReference

Transmission

Gears

16 forward and 8 reverseReference

Clutch

355.6mm cerametallic discReference

356mm cerametallic discReference

Transmission

—

Torque AmplifierReference

PTO & Hydraulics

PTO (claimed)

84.3 kWReference

85.8 kWReference

PTO (tested)

84.8 kWReference

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Hydraulic system

85.2 LReference

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Type

partial power shiftReference

two-speed power shiftReference

Capacity

85.2 LReference

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Valves

2 to 4Reference

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Pump flow

68.1 lpmReference

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Total flow

102.2 lpmReference

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Steering flow

45.4 lpmReference

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Rear Type

IIReference

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Control

draft sensingReference

—

Rear PTO

independentReference

—

Rear PTO Type

540/1000 (1.375)Reference

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Engine RPM

1000@2100Reference

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Power at rated PTO speed

83.9 kWReference

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Capacities

Fuel

189.2 LReference

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Dimensions

Wheelbase

266 cmReference

Weight

11300 to 13200 poundsReference

5533 kgReference

Front tire

11L-15Reference

—

Rear tire

18.4-34Reference

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Ag front

11L-15Reference

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Ag rear

18.4-34Reference

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Length

467 cmReference

403 cmReference

Width

259 cmReference

Height (cab)

284 cmReference

289 cmReference

Shipping weight

5125 kgReference

5533 kgReference

Operating weight

5987 kgReference

—

Ground clearance

33 cmReference

38 cmReference

Rear axle

82 by 2997 mmReference

—

Front tread

152 to 213 cmReference

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Rear tread

167 to 326 cmReference

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3688 Serial Numbers

1981

501Reference

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1982

1743Reference

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1983

2482Reference

—

1984

2695Reference

—

1985

3068Reference

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Location:

Serial number plate on the right side of the tractor frame, ahead of the rear axle.Reference

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Electrical

Ground

negativeReference

Battery volts

12Reference

Batteries

—

2Reference

Test results

Fuel use

26.9 l/hourReference

—

Max pull

5556 kgReference

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Speeds

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.