International Harvester 33

Manual transmission fluid capacity & service interval

International Harvester 33 uses manual transmission fluid with a capacity range of 33 to 36 liters. Service intervals include a check at 200 hours and a change at 1600 hours. The data covers 5 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
733 (1983-1985)
  • Use: Normal
  • Capacity 33 liter
  • Check 200 hours
  • Change 1600 hours
433 (1976-1985)
  • Use: Normal
  • Capacity 36 liter
  • Check 200 hours
  • Change 1600 hours
  • Code: 8/4
533 (1976-1985)
  • Use: Normal
  • Capacity 36 liter
  • Check 200 hours
  • Change 1600 hours
  • Code: 8/4
633 (1976-1985)
  • Use: Normal
  • Capacity 36 liter
  • Check 200 hours
  • Change 1600 hours
  • Code: 8/4
733 (1976-1983)
  • Use: Normal
  • Capacity 33 liter
  • Check 200 hours
  • Change 1600 hours
  • Code: 8/4

Additional Notes

  • The International Harvester 33 series manual transaxle fluid capacity splits into two distinct values across the model range: the 433, 533, and 633 variants each hold 36 liters, while the 733 holds 33 liters.
  • A 36-liter transaxle fill is a notably large capacity, consistent with heavy-duty agricultural or industrial equipment where the transmission and axle share a common fluid reservoir in a single integrated housing.
  • The 733's 33-liter capacity applies uniformly across both of its listed production periods, 1976-1983 and 1983-1985, indicating no change to the transaxle fluid volume at that model year boundary.
  • All five configurations share an identical check interval of 200 hours under normal use conditions, meaning fluid level inspection is required at the same frequency regardless of which variant is being serviced.
  • The fluid change interval across all listed configurations is 1600 hours under normal use conditions, which in agricultural equipment terms can represent a substantial span of seasonal operating time before a drain and refill is due.
  • The 433, 533, and 633 share not only the same 36-liter capacity but also the same check and change intervals, meaning all three configurations follow an identical service schedule for the manual transaxle fluid.

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