Caterpillar Motor graders

Differential fluid capacity & service interval

Caterpillar motor graders use differential fluid with a capacity of 184 liters. Service intervals include checks at 1 month or 250 hours and 3 months or 500 hours, with fluid changes at 6 months or 1000 hours. The data covers 2 configurations.

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

TypeSpecifications
  • 24M, B9K (2006- )
  • + hub reductions
  • Use: Normal
  • Capacity 184 liter
  • Check 3 months/ 500 hours
  • Change 6 months/ 1000 hours
  • 24H, 7KK (1996-2007)
  • + hub reductions
  • Use: Normal
  • Capacity 184 liter
  • Check 1 months/ 250 hours
  • Change 6 months/ 1000 hours

Additional Notes

  • The Caterpillar 24H (7KK) and 24M (B9K) motor graders share an identical differential and hub reductions fluid capacity of 184 liters, a figure that reflects a combined fill covering both the differential assembly and the integrated hub reduction units rather than the differential alone.
  • The 24H (7KK), covering model years 1996-2007, carries a fluid check interval of 1 month or 250 hours under normal use conditions, which is a notably shorter inspection cycle compared to many heavy equipment differentials and points to a more frequent monitoring requirement for that configuration.
  • The 24M (B9K), with a starting model year of 2006, specifies a fluid check interval of 3 months or 500 hours under normal use conditions, doubling the time and hour thresholds relative to the 24H (7KK) check schedule despite the two models sharing the same 184-liter capacity.
  • Both configurations share a fluid change interval of 6 months or 1000 hours under normal use conditions, meaning the drain-and-refill schedule is consistent across the 24H (7KK) and 24M (B9K) even where the check intervals differ.
  • The 184-liter capacity across both configurations is a substantial volume, consistent with a large articulated motor grader tandem drive system where the differential housing and hub reductions form a single interconnected fluid circuit requiring a unified service fill.

Other Systems