Irisbus EuroRider

Brake fluid capacity & service interval

Irisbus EuroRider uses brake fluid with a capacity of 2,5 liters. The service interval for fluid replacement is 12 months. The data covers 3 configurations.

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

TypeSpecifications
EuroRider 391E.12.29 (1995-2006)
  • Use: Normal
  • Capacity 2,5 liter
  • Change 12 months
EuroRider 391E.12.29A (1995-2006)
  • Use: Normal
  • Capacity 2,5 liter
  • Change 12 months
EuroRider 391E.12.35 (1995-2006)
  • Use: Normal
  • Capacity 2,5 liter
  • Change 12 months

Additional Notes

  • The Irisbus EuroRider hydraulic brake system holds 2.5 liters of brake fluid across the 391E.12.29, 391E.12.29A, and 391E.12.35 variants, a capacity consistent with a full hydraulic circuit fill rather than a partial top-up or reservoir-only service.
  • All three EuroRider variants share an identical 12-month change interval, applied under normal use conditions, meaning the fluid replacement cycle is calendar-based rather than mileage-driven.
  • The 391E.12.29 and 391E.12.29A are distinct variants yet carry the same 2.5-liter capacity and 12-month interval, indicating no difference in brake system volume between the two despite the suffix designation.
  • A 12-month brake fluid change interval is standard practice for hydraulic systems because brake fluid is hygroscopic, absorbing moisture over time, which lowers the boiling point and can compromise braking performance under heat.
  • The 2.5-liter figure applies specifically to the hydraulic brake system, distinguishing the service fill from any air brake or pneumatic components that may exist elsewhere on the vehicle.

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