International Harvester 43 / 45

Brake fluid capacity & service interval

International Harvester 43 / 45 uses brake fluid with a capacity of 0,5 liter. Service intervals include checking at 50 hours and changing at 1000 or 1600 hours. The data covers 5 configurations.

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

TypeSpecifications
845 XL, XLA (1983-1985)
  • Use: Normal
  • Capacity 0,5 liter
  • Check 50 hours
  • Change 1000 hours
743 (1981-1985)
  • Use: Normal
  • Capacity 0,5 liter
  • Check 50 hours
  • Change 1600 hours
743 XL (1981-1985)
  • Use: Normal
  • Capacity 0,5 liter
  • Check 50 hours
  • Change 1000 hours
745 S (1981-1985)
  • Use: Normal
  • Capacity 0,5 liter
  • Check 50 hours
  • Change 1600 hours
745 XL (1981-1985)
  • Use: Normal
  • Capacity 0,5 liter
  • Check 50 hours
  • Change 1000 hours

Additional Notes

  • The hydraulic brake system capacity across all five configurations of the International Harvester 43 / 45 series is 0.5 liter, a figure consistent with a service fill rather than an overhaul volume, reflecting the relatively compact reservoir sizing typical of agricultural tractor brake circuits.
  • All configurations share a 50-hour check interval under normal use conditions, meaning brake fluid level and system condition are to be verified at that frequency regardless of trim or model designation.
  • The 743 and 745 S carry a 1600-hour fluid change interval, while the 743 XL, 745 XL, and 845 XL/XLA are each specified at a shorter 1000-hour change interval, representing a notable divergence in service scheduling between the standard and XL-designated variants.
  • The 1000-hour change interval on the XL and XLA trims is 600 hours shorter than the 1600-hour interval on the non-XL 743 and 745 S, a difference that translates to meaningfully more frequent fluid replacement over the working life of the machine.
  • The 845 XL and XLA, covering model years 1983-1985, share the same 0.5-liter capacity and 1000-hour change interval as the 743 XL and 745 XL, aligning the 845-series brake service schedule with the broader XL trim pattern rather than with the earlier standard-trim specifications.
  • All five rows are designated under normal use conditions, meaning none of the capacity or interval figures listed reflect a severe-duty or reduced-interval scenario.

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