Hürlimann H-400

Power steering fluid capacity & service interval

Hürlimann H-400 power steering fluid has a capacity range of 2 to 2,5 liters. Service intervals include checks at 125 and 150 hours, and changes at 1000 and 1200 hours. The data covers 4 configurations.

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

TypeSpecifications
H-496 T (1985-1989)
  • Use: Normal
  • Capacity 2 liter
  • Check 150 hours
  • Change 1200 hours
H-470 (1982-1985)
  • Use: Normal
  • Capacity 2,5 liter
  • Check 125 hours
  • Change 1000 hours
H-480 (1982-1985)
  • Use: Normal
  • Capacity 2,5 liter
  • Check 125 hours
  • Change 1000 hours
H-490 (1982-1985)
  • Use: Normal
  • Capacity 2,5 liter
  • Check 125 hours
  • Change 1000 hours

Additional Notes

  • The Hürlimann H-400 series power steering system holds 2.5 liters across the H-470, H-480, and H-490 configurations produced between 1982-1985, indicating a service fill volume rather than a full overhaul capacity.
  • The H-496 T, covering 1985-1989, carries a slightly reduced power steering fluid capacity of 2 liters, reflecting a difference in system design compared to the earlier three configurations.
  • All four configurations share a normal use condition, meaning the stated check and change intervals apply to standard operating environments without accounting for more demanding workloads.
  • The H-470, H-480, and H-490 share an identical check interval of every 125 hours under normal use conditions, alongside a fluid change interval set at 1000 hours.
  • The H-496 T carries a longer check interval of 150 hours and a change interval of 1200 hours under normal use, both extended relative to the 1982-1985 configurations.
  • In agricultural machinery, hour-based service intervals are tied to engine operating hours rather than calendar time or distance, making actual service frequency dependent on how intensively the tractor is used across a season.
  • The ratio between check and change intervals is consistent across all four configurations: the fluid change is scheduled at eight times the check interval for the 1982-1985 models, and exactly eight times for the H-496 T as well, suggesting a deliberate maintenance structure across the H-400 series.

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