International Harvester 1086

The International Harvester 1086 is a tractor produced by International Harvester. It is equipped with a 414 ci 6.8 L engine. The listed engine power is 131.41 hp 98.0 kW. Transmission: Torque Amplifier. Operating weight: 12300 to 13030 pounds.

Engine Power

131.41 hp 98.0 kW

Fuel & Capacities

63 gal (main) 238.5 L

Transmission

Torque Amplifier

Operating Weight

12300 to 13030 pounds

Overview

	1976 - 1981 86 SeriesRow-Crop tractor 86 Series Row-Crop tractor

Production
Manufacturer	International Harvester
Row-Crop tractor
Built in Rock Island, Illinois, USA
Total built	47,420
Original price	$35,700 (1981)

Variants
1086 Hi-Clear	high clearance

International Harvester 1086 Engine
International Harvester 6.8L 6-cyl diesel
Engine details ...

International Harvester 1086 Power
Drawbar (claimed)	114 hp 85.0 kW
PTO (claimed)	130 hp 96.9 kW
Drawbar (tested)	113.04 hp 84.3 kW
PTO (tested)	131.41 hp 98.0 kW
Performance test details ...

Mechanical
Two- or four-wheel drive
Final drives	bull gear
Differential lock	mechanical rear OptOptional
Steering	power assist
Hydraulic disc brakes
Cab standard with air-conditioning. Open operator station and four-post ROPS available.

Capacity
Fuel	63 gal (main) 238.5 L
	22 gal (auxilary) 83.3 L
Hydraulic system	22.5 gal 85.2 L

Hydraulics
Type	open center
	closed center *Optional after late 1980.
Capacity	22.5 gal 85.2 L
Valves	2
Pump flow	12 gpm 45.4 lpm

Tractor hitch
Rear Type	III

Power Take-off (PTO)
Rear PTO	independent
Rear PTO Type	540/1000 (1.375)
Engine RPM	540@2100
	1000@2100

Dimensions & Tires
Wheelbase	105 inches (wide-tread front) 266 cm
	101 inches (tricycle front) 256 cm
	99 inches (4WD) 251 cm
	106 inches (Hi-Clear) 269 cm
Weight	12300 to 13030 pounds
Front tire	10.00-16
Rear tire	18.4-38
Full dimensions and tires ...

Electrical
Ground	negative
Charging system	alternator
Charging amps	42
	61 (with cab)
Batteries	2
Battery CCA	470
Battery volts	12

References

1978 Buyer's Guide published by International Harvester
1979 Buyer's Guide published by International Harvester
Buyer's Guide 1981 published by International Harvester
Series 86 Tractors published in 1976, by International Harvester
86 Series Tractors - The pro-ag line published in 1976, by International Harvester
Operator's Manual 786, 886, 986, 1086, 1486, 1586 and Hydro-186 Tractors (1096207R4) published in 1986

Engine

Engine Detail — 414 ci / 6.8 L Diesel

Manufacturer	International Harvester DT-414
Configuration	turbocharged diesel, 6-cylinder, liquid-cooled
Displacement	414 ci 6.8 L
Bore/Stroke	4.30x4.75 inches 109 x 121 mm
Air cleaner	dual dry element
Rated RPM	2400
Coolant capacity	25 qts 23.7 L
Oil capacity	20 qts 18.9 L

Transmission

Transmission options
8-speed gear
16-speed two-speed power shift

Transmission — 8 forward and 4 reverse gear

Type	gear
Gears	8 forward and 4 reverse
Oil capacity	90 qts 85.2 L
The transmission features three ranges (low, high, and reverse) with four gears (1-4) in each range. The range and gear can be shifted only when the tractor is stopped.
With 18.4-38 rear tires.

Transmission — Torque Amplifier

Transmission	Torque Amplifier
Type	two-speed power shift
Gears	16 forward and 8 reverse
Oil capacity	90 qts 85.2 L
Oil type	IH Hy-Tran/B-6
The transmission features three ranges (low, high, and reverse) with four gears (1-4) in each range. The Torque Amplifier (TA) provides an additional high/low selection for each speed. The range and gear can be shifted only when the tractor is stopped. The TA can be shifted while the tractor is in motion.
With 18.4-38 rear tires.

	IH Hy-Tran/B-6

Dimensions

International Harvester 1086 Tires
Ag front	10.00-16 (2WD)
	13.6-24 (4WD)
Ag rear	18.4-38

Dimensions
Wheelbase	105 inches (wide-tread front) 266 cm
	101 inches (tricycle front) 256 cm
	99 inches (4WD) 251 cm
	106 inches (Hi-Clear) 269 cm
Length	168 inches (2WD) 426 cm
	165 inches (4WD) 419 cm
	169 inches (Hi-Clear) 429 cm
Width	102 inches 259 cm
	98 inches (Hi-Clear) 248 cm
Height (cab)	115 inches 292 cm
	126 inches (Hi-Clear) 320 cm
Ground clearance	13 inches 33 cm
	26 inches (Hi-Clear) 66 cm

International Harvester 1086 Weight
Shipping	12,300 lbs 5579 kg
	13,030 lbs (Hi-Clear) 5910 kg
Operating	12,715 lbs (2WD) 5767 kg

Tests

Nebraska Tractor Test 1247
Diesel 16-speed 2WD June 2 - 14, 1977 Link: Nebraska Tractor Test 1247 file
PTO performance
Power at rated engine speed	131.41 hp 98.0 kW
Fuel use	8.6 gal/hour 32.6 l/hour
Power at rated PTO speed	133.67 hp 99.7 kW
Fuel use	8.2 gal/hour 31.0 l/hour
Drawbar performance
Max power	113.04 hp 84.3 kW
Fuel use	8.5 gal/hour 32.2 l/hour
Gear 1-Hi-TA used for power test.
Max pull	13,503 lbs 6124 kg
Gear 2-Lo-DD used for pull test.

Photos

International Harvester 1086

International 1086 with four-wheel drive.

Recommended Implements & Sizing Guide

Engineering recommendations for International Harvester 1086 based on its 131.41 HP power envelope and ASAE agricultural standards.

Implement & Operation	Recommended Size	Workload Rating	Engineering Notes
Moldboard PlowPrimary Tillage	4 to 5 Bottom (16-18")4 - 5 铧 (40-45 cm)	Heavy Duty	Heavy primary tillage; semi-mounted hitch recommended.
Rotary Cutter / MowerMowing & Clearing	10 to 12 ft Flex-Wing3.0 - 3.6 m 折叠双翼	Heavy Duty	Wide swath pasture and crop residue shredding.
Rotary TillerSeedbed Prep	90 to 120 in Heavy Duty230 - 300 cm 重型旋耕机	Commercial / Field Scale	Deep intensive seedbed preparation for commercial row crops.
Disc HarrowSecondary Tillage	15 to 22 ft Folding Disc4.5 - 6.7 m 折叠式圆盘耙	Commercial / Field Scale	Wide commercial field leveling; requires hydraulic remotes.
Hay BalerHay & Forage	5x6 Round Baler or 3x3 Mid Square1.5x1.8 m 大圆捆或中型方捆机	Heavy Duty	High density baling; requires minimum 85 PTO HP.

Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.

Fluids, Capacities & Working Autonomy

Standard fluid requirements, service intervals, and continuous runtime estimates for International Harvester 1086.

Estimated Continuous Field Runtime: 9.2 hrs

Approximately 9.2 hours of continuous field operation at ~75% rated power on a full tank (63 gal / 238.5 L).

Estimated 75% Load Fuel Burn~6.8 gal/hr (25.9 L/hr)

Engine Crankcase Oil

SAE 15W-40 (Heavy Duty Diesel)

Standard Spec: API CK-4 / CJ-4 Heavy Duty

Service Interval: 150 – 250 Hours

Transmission & Hydraulic System

UTTO (Universal Tractor Transmission Oil)

Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)

Service Interval: 600 – 1000 Hours

Engine Cooling System

50/50 Ethylene Glycol Pre-mix

Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze

Service Interval: 2 Years / 1500 Hours