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| info | |
| 1981 - 1985 30 Series, Row-Crop tractor | |
| Previous model: | International Harvester 986 |
| Series back: | International Harvester 3488 |
| Production | |
| Manufacturer: | International Harvester |
| Factory: | Rock Island, Illinois, USA |
| Total built: | 2,572 |
| Original price (USD), $45,000 (1981 ), | |
| Variants | |
| 3688 Hi-Clear: | high-clearance model |
| Capacity | |
| Fuel: | 50 gal [189.3 L] |
| Hydraulic system: | 22.5 gal [85.2 L] |
| 3-Point Hitch | |
| Rear Type: | II |
| Control: | draft sensing |
| Power Take-off (PTO) | |
| Rear PTO: | independent |
| Rear RPM: | 540/1000 |
| Engine RPM: | 540@2100 1000@2100 |
| Dimensions & Tires | |
| Wheelbase: | 105 inches [266 cm] |
| Weight: | 11300 to 13200 pounds |
| Front tire: | 11L-15 |
| Rear tire: | 18.4-34 |
| 3688 Serial Numbers | |
| Location: | Serial number plate on the right side of the tractor frame, ahead of the rear axle. |
| 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] |
| Mechanical | |
| Chassis: | 4x2 2WD, 4x4 MFWD 4WD |
| Steering: | power |
| Brakes: | hydraulic wet disc |
| Cab: | Cab standard with heat and A/C. Optional burgundy or western finish interiors. |
| 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] |
| Electrical | |
| Ground: | negative |
| Battery | |
| Volts: | 12 |
| info | |
| Bore/Stroke: | 4.30x5.00 inches [109 x 127 mm] |
| Air cleaner: | dual dry elmeent |
| Compression: | 16:1 |
| Rated RPM: | 2400 |
| Idle RPM: | 900-2400 |
| Starter volts: | 12 |
| Oil capacity: | 14 qts [13.2 L] |
| Coolant capacity: | 26 qts [24.6 L] |
| Engine Detail | |
| International Harvester D436, diesel, 6-cylinder, liquid-cooled, 436 ci [7.1 L] |
| info | |
| Speeds: | With 18.4-34R1 rear tires. |
| Transmission | |
| Type: | partial power shift |
| Gears: | 16 forward and 8 reverse |
| Clutch: | cerametallic disc |
| Oil capacity: | 90 qts [85.2 L] |
| 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. | |
| info | |
| Previous model: | International Harvester 986 |
| Series back: | International Harvester 3488 |
| Dimensions | |
| Weight (shipping): | 11300 lbs [5125 kg] |
| Weight (operating): | 13200 lbs [5987 kg] |
| Wheelbase: | 105 inches [266 cm] |
| Length: | 184 inches [467 cm] |
| Width: | 102 inches [259 cm] *Width at minimum tread. |
| Height (cab): | 112 inches [284 cm] |
| Ground clearance: | 13 inches [33 cm] |
| Rear axle: | 3.25 by 104 inches [82x2641 mm] 3.25 by 118 inches [82x2997 mm] |
| Front tread: | 60 to 84 inches [152 to 213 cm] |
| Rear tread: | 66 to 128.5 inches [167 to 326 cm] |
| 2WD turn radius: | 13.5 feet [4.1 m], 11.6 feet [3.5 m] (with brakes) |
| International Harvester 3688 Tires | |
| Ag front: | 11L-15 |
| Ag rear: | 18.4-34 |