Hürlimann H-400

Differential fluid capacity & service interval

Hürlimann H-400 differential fluid capacity ranges from 5 to 35 liters. Service intervals include checks at 125 and 150 hours, and changes at 1000, 1200, and 3000 hours. The data covers 8 configurations.

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

TypeSpecifications
  • H-468, H-468 Prestige (1986-1995)
  • Front
  • Use: Normal
  • Capacity 6 liter
  • Check 150 hours
  • Change 1200 hours
  • Code: (4x4)
  • H-478, H-478 Prestige (1986-1995)
  • Front
  • Use: Normal
  • Capacity 6 liter
  • Check 150 hours
  • Change 1200 hours
  • Code: (4x4)
  • H-488 T (1986-1995)
  • Front
  • Use: Normal
  • Capacity 6 liter
  • Check 150 hours
  • Change 1200 hours
  • Code: (4x4)
  • H-466 (1982-1986)
  • Front
  • Use: Normal
  • Capacity 5 liter
  • Check 150 hours
  • Change 1200 hours
  • Code: (4x4)
  • H-470 (1982-1985)
  • Front
  • Use: Normal
  • Capacity 6,5 liter
  • Check 125 hours
  • Change 1000 hours
  • Code: (4x4)
  • H-480 (1982-1985)
  • Front
  • Use: Normal
  • Capacity 6,5 liter
  • Check 125 hours
  • Change 1000 hours
  • Code: (4x4)
  • H-480 (1982-1985)
  • Rear/hydraulic system
  • Use: Normal
  • Capacity 35 liter
  • Check 125 hours
  • Change 3000 hours
  • H-490 (1982-1985)
  • Front
  • Use: Normal
  • Capacity 7,2 liter
  • Check 125 hours
  • Change 1000 hours
  • Code: (4x4)

Additional Notes

  • Front differential capacities across the Hürlimann H-400 range span from 5 liters to 7.2 liters, with the H-466 at the lower end and the H-490 at the upper end. In differential service, a higher fluid volume generally reflects a larger housing or more complex gear assembly requiring greater lubrication reserves.
  • The H-466 (1982-1986) carries a 5-liter front differential capacity, which is the smallest among all listed configurations. The H-468, H-468 Prestige, H-478, H-478 Prestige, and H-488 T all share a 6-liter front differential capacity, indicating a common housing design across those variants.
  • The H-470 and H-480 (both 1982-1985) share a front differential capacity of 6.5 liters, while the H-490 from the same production period holds 7.2 liters. The H-490's larger capacity aligns with its position as the highest-displacement model in the early series.
  • The 1982-1985 models — H-470, H-480, and H-490 — follow a check interval of 125 hours and a change interval of 1,000 hours for the front differential. The later 1986-1995 variants, including the H-466, H-468, H-478, and H-488 T, use a longer check interval of 150 hours and an extended change interval of 1,200 hours.
  • The shift from 1,000-hour to 1,200-hour change intervals between the early and later production variants represents a 20 percent extension in service life between fluid changes. Such extensions are typically associated with reformulated lubricants or revised engineering tolerances in updated drivetrain components.
  • The H-480 (1982-1985) is the only configuration in the specifications that includes a rear/hydraulic system differential entry alongside the front differential. The rear/hydraulic system holds 35 liters, a capacity far exceeding any front differential listed, which reflects the combined volume demands of a shared rear differential and hydraulic circuit — a common arrangement in agricultural tractors of the period.
  • The H-480 rear/hydraulic system carries a change interval of 3,000 hours under normal use conditions, compared to the 1,000-hour change interval for the same model's front differential. The extended interval for the rear/hydraulic system is consistent with the larger fluid reservoir, where greater volume dilutes contaminants more slowly and reduces the rate of fluid degradation per operating hour.
  • The H-480 rear/hydraulic system check interval is 125 hours, matching the front differential check interval for the same model. Despite the significant difference in change intervals between the two systems, the inspection frequency remains identical, allowing both to be serviced on the same routine maintenance schedule.

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