International Harvester 3688 Transmission


International Harvester 3688 tractor photo
1981 - 1985
30 Series
Row-Crop tractor
Series map:
3488
3688
124.4hp*
125.6hp*
*Estimated engine power for comparison only.
Transmission
Typepartial power shift
Gears16 forward and 8 reverse
Clutchcerametallic disc
Oil capacity90 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.
Speeds
With 18.4-34R1 rear tires.
3688  partial power shift speeds
Shift Pattern
International Harvester 3688 transmission controls
Page information
Peter Easterlund - owner of TractorData.com
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Updated on March 25, 2022
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