International Harvester 33

Differential fluid capacity & service interval

International Harvester 33 uses differential fluid with a capacity of 4,5 liters. Service intervals include checking at 200 hours and changing at 800 hours. The data covers 4 configurations.

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

TypeSpecifications
  • 733 (1983-1985)
  • Front
  • Use: Normal
  • Capacity 4,5 liter
  • Check 200 hours
  • Change 800 hours
  • Code: (4x4)
  • 533 (1976-1985)
  • Front
  • Use: Normal
  • Capacity 4,5 liter
  • Check 200 hours
  • Change 800 hours
  • Code: (4x4)
  • 633 (1976-1985)
  • Front
  • Use: Normal
  • Capacity 4,5 liter
  • Check 200 hours
  • Change 800 hours
  • Code: (4x4)
  • 733 (1976-1983)
  • Front
  • Use: Normal
  • Capacity 4,5 liter
  • Check 200 hours
  • Change 800 hours
  • Code: (4x4)

Additional Notes

  • The International Harvester 33 series front differential holds 4.5 liters across the 533, 633, and 733 configurations, indicating a service fill volume rather than a full overhaul capacity.
  • A check interval of 200 hours applies to the front differential fluid on all listed configurations under normal use conditions, reflecting a routine monitoring schedule between full drain cycles.
  • The change interval for front differential fluid is set at 800 hours across all configurations, meaning a full drain and refill occurs once for every four scheduled fluid level checks.
  • The 533 and 633 share identical front differential fluid specifications for the full 1976-1985 span, with no variation in capacity, check interval, or change interval between the two models.
  • The 733 appears in two separate row entries covering 1976-1983 and 1983-1985, yet both carry the same 4.5-liter capacity and identical 200-hour check and 800-hour change intervals, showing no specification shift across that boundary year.

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