Yanmar YT3

Power steering fluid capacity & service interval

Yanmar YT3 requires power steering fluid with a capacity of 29 liters. Service intervals include checking at 10 hours and changing at 600 hours or 24 months. The data covers 2 configurations.

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

TypeSpecifications
  • YT347 (2021- )
  • Transaxle/hydraulic system
  • Use: Normal
  • Capacity 29 liter
  • Check 10 hours
  • Change 600 hours/ 24 months
  • YT359 (2021- )
  • Transaxle/hydraulic system
  • Use: Normal
  • Capacity 29 liter
  • Check 10 hours
  • Change 600 hours/ 24 months

Additional Notes

  • The Yanmar YT347 and YT359, both starting from 2021, share a combined transaxle, hydraulic system, and power steering fluid capacity of 29 liters, which reflects a unified reservoir serving all three functions rather than a dedicated power steering circuit alone.
  • A 29-liter capacity is notably large for a power steering application and is consistent with integrated tractor hydraulic systems, where a single fluid volume supports steering, implement lift, and transmission lubrication simultaneously.
  • Both the YT347 and YT359 carry a check interval of 10 hours under normal use conditions, indicating the fluid level is expected to be monitored very frequently relative to typical automotive standards.
  • The change interval for both configurations is set at 600 hours or 24 months under normal use, whichever comes first, meaning calendar time can trigger a service requirement even when operational hours remain low.
  • The YT347 and YT359 produce identical specifications across capacity, check interval, and change interval, indicating no differentiation in fluid service requirements between the two engine variants within the YT3 series starting from 2021.

Other Systems