International Harvester 3688
| | 1981 - 1985 |
| 30 Series | | Row-Crop tractor |
|
Series map:
3488
3688
124.4hp*
125.6hp*
*Estimated engine power for comparison only.
| Production |
| Manufacturer | International Harvester
|
| Row-Crop tractor |
| Built in Rock Island, Illinois, USA |
| Total built | 2,572
|
| Original price was $45,000 in 1981 |
| Variants |
| 3688 Hi-Clear | high-clearance model
|
| International Harvester 3688 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
|
 Performance test details ... |
| Mechanical |
| Two- or four-wheel drive |
| Power steering |
| Hydraulic wet disc brakes |
| Cab standard with heat and A/C. Optional burgundy or western finish interiors. |
| Capacity |
| Fuel | 50 gal
189.2 L
|
| Hydraulic system | 22.5 gal
85.2 L
|
| Hydraulics |
| 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) |
| Rear PTO | independent
|
| Rear PTO Type | 540/1000
|
| Engine RPM | 540@2100
|
| | 1000@2100
|
| 3688 Serial Numbers |
| 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 |
| Ground | negative
|
| Battery volts | 12
|
| References |
 |
| 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 |
| Page information |
 |
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| Peter Easterlund - owner/author |
| Email: Peter@TractorData.com |
| Updated on March 25, 2022 |
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Engine details ...
Transmission details ...
Full dimensions and tires ...