International Harvester 3688: all source data

All 68 values recorded for this model, as the source lists them and in its units. The spec sheet shows the same data checked, typed and converted.

Overview

Production
ManufacturerInternational Harvester
(no label)Row-Crop tractor
(no label)Built in Rock Island, Illinois, USA
Total built2,572
(no label)Original price was $45,000 in 1981
Engine
(no label)International Harvester 7.1L 6-cyl diesel
Transmission
(no label)16-speed partial power shift
Power
Drawbar (claimed)100.2 hp | 74.7 kW
PTO (claimed)113 hp | 84.3 kW
Drawbar (tested)99.21 hp | 74.0 kW
PTO (tested)113.72 hp | 84.8 kW
Mechanical
(no label)Two- or four-wheel drive
Final drivesbull gear
Differential lockrear
(no label)Power steering
(no label)Hydraulic wet disc brakes
(no label)Cab standard with heat and air-conditioning. Optional burgundy or western finish interiors.
Capacity
Fuel50 gal | 189.2 L
Hydraulic system22.5 gal | 85.2 L
Hydraulics
Typeclosed center
Capacity22.5 gal | 85.2 L
Valves2 to 4
Pump flow18 gpm | 68.1 lpm
Total flow27 gpm | 102.2 lpm
Steering flow12 gpm | 45.4 lpm
Hitch
Rear TypeII
Controldraft sensing
Pto
Rear PTOindependent
Rear PTO Type540/1000 (1.375)
Engine RPM540@2100
Engine RPM1000@2100
Dimensions
Wheelbase105 inches | 266 cm
Weight11300 to 13200 pounds
Front tire11L-15
Rear tire18.4-34
Electrical
Groundnegative
Battery volts12

Engine

Engine detail
(no label)International Harvester D436
(no label)diesel
(no label)6-cylinder
(no label)liquid-cooled
Displacement436 ci | 7.1 L
Bore/Stroke4.30x5.00 inches | 109 x 127 mm
Air cleanerdual dry elmement
Compression16:1
Rated RPM2400
Idle RPM900-2400
Starter volts12
Coolant capacity (Coolant)26 qts | 24.6 L
Engine oil
Oil capacity14 qts | 13.2 L

Transmission

Transmission
Typepartial power shift
Gears16 forward and 8 reverse
Clutch355.6mm cerametallic disc
Oil capacity90 qts | 85.2 L
(no label)Left lever selects gear, right lever selects high, low, or reverse range. Tractor may be shifted on the move without the clutch between gear pairs (1-2, 3-4, etc). Synchronized shifting, using the clutch, between gear pairs (2 to 3, 4 to 5, etc). The transmission is four-gear with the powershift provided by an electric solenoid actuated Torque Amplifier.

Dimensions

Tires
Ag front11L-15
Ag rear18.4-34
Dimensions
Wheelbase105 inches | 266 cm
Length184 inches | 467 cm
Width102 inches | 259 cm
Height (cab)112 inches | 284 cm
Shipping weight11300 lbs | 5125 kg
Operating weight13200 lbs | 5987 kg
Ground clearance13 inches | 33 cm
Rear axle3.25 by 104 inches | 82 by 2641 mm
Rear axle3.25 by 118 inches | 82 by 2997 mm
Front tread60 to 84 inches | 152 to 213 cm
Rear tread66 to 128.5 inches | 167 to 326 cm