Yanmar YT3

Coolant capacity & service interval

Yanmar YT3 coolant capacity ranges from 6,2 to 7,6 liters. Service intervals include checks at 10 hours and changes at 2000 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- )
  • Use: Normal
  • Capacity 6,2 liter
  • Check 10 hours
  • Change 2000 hours/ 24 months
YT359 (2021- )
  • Use: Normal
  • Capacity 7,6 liter
  • Check 10 hours
  • Change 2000 hours/ 24 months

Additional Notes

  • The Yanmar YT3 series shows a capacity difference between the two available configurations: the YT347 cooling system holds 6.2 liters, while the YT359 cooling system holds 7.6 liters, a difference of 1.4 liters that reflects the larger engine displacement of the YT359.
  • Both configurations share an identical check interval of every 10 hours, which is a short-cycle inspection interval typical of systems where coolant level monitoring is treated as a routine operational check rather than a scheduled service event.
  • The change interval for both the YT347 and YT359 cooling systems is set at 2000 hours or 24 months under normal use conditions, whichever comes first. The dual-trigger structure means time elapsed can mandate a change even when the hour threshold has not been reached.
  • A 24-month calendar limit on coolant life is consistent with the chemical degradation properties of glycol-based coolants, which lose corrosion inhibitor effectiveness over time regardless of engine operating hours accumulated.
  • The 2000-hour service threshold for coolant changes places the interval in a range associated with extended-duty agricultural equipment, where machines may accumulate hours across multiple seasons before reaching the time-based limit.

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