international harvester 3688
 | 1981 - 1985
30 SeriesRow-Crop tractor | 1981 - 1985 | 30 Series | Row-Crop tractor |
|---|---|---|---|---|
1981 - 1985 | ||||
30 Series | ||||
Row-Crop tractor | ||||
1981 - 1985 | |
|---|---|
30 Series | |
Row-Crop tractor |
Production | |
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Manufacturer | International Harvester |
Row-Crop tractor | |
Built in Rock Island, Illinois, USA | |
Total built | 2,572 |
Original price was $45,000 in 1981 | |
Variants | |
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3688 Hi-Clear | high-clearance model |
International Harvester 3688 Engine | |
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International Harvester 7.1L 6-cyl diesel | |
Engine details ...  |
International Harvester 3688 Transmission | |
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16-speed partial power shift | |
Transmission details ...  |
International Harvester 3688 Power | |
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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 |
Performance test details ...  | |
Mechanical | |
|---|---|
Two- or four-wheel drive | |
Final drives | bull gear |
Differential lock | rear |
Power steering | |
Hydraulic wet disc brakes | |
Cab standard with heat and air-conditioning. Optional burgundy or western finish interiors. | |
Photos | |
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 | |
International Harvester 3688 photos...  |
Capacity | |
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Fuel | 50 gal
189.2 L |
Hydraulic system | 22.5 gal
85.2 L |
Hydraulics | |
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Type | closed center |
Capacity | 22.5 gal
85.2 L |
Valves | 2 to 4 |
Pump flow | 18 gpm
68.1 lpm |
Total flow | 27 gpm
102.2 lpm |
Steering flow | 12 gpm
45.4 lpm |
Tractor hitch | |
|---|---|
Rear Type | II |
Control | draft sensing |
Power Take-off (PTO) | |
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Rear PTO | independent |
Rear PTO Type | 540/1000 (1.375) |
Engine RPM | 540@2100 |
| 1000@2100 |
Dimensions & Tires | |
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Wheelbase | 105 inches
266 cm |
Weight | 11300 to 13200 pounds |
Front tire | 11L-15 |
Rear tire | 18.4-34 |
Full dimensions and tires ...  | |
3688 Serial Numbers | |
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Location: | Serial number plate on the right side of the tractor frame, ahead of the rear axle. |
1981 | 501 |
1982 | 1743 |
1983 | 2482 |
1984 | 2695 |
1985 | 3068 |
FAQ: How to read a serial number table. | |
Electrical | |
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Ground | negative |
Battery volts | 12 |
References | |
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 | |
Buyer's Guide 1982 published by International Harvester | |
International 30 Series Tractors published by International Harvester | |
Operator's Manual 3088, 3288, 3488-Hydro and 3688 Tractors (1258513C1) published in 1981 | |
Tractors 90 & 110 HP published in 1981, by International Harvester | |
3288 and 3688 Product Guide published in 1981, by International Harvester |