Hesston (Fiatagri) 7800

Coolant capacity & service interval

Hesston (Fiatagri) 7800 coolant capacity is 60 liters. Service intervals include checking every 10 hours and changing every 24 months. The data covers 4 configurations.

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

TypeSpecifications
7820 (1993-2000)
  • Use: Normal
  • Capacity 60 liter
  • Check 10 hours
  • Change 24 months
7825 (1993-2000)
  • Use: Normal
  • Capacity 60 liter
  • Check 10 hours
  • Change 24 months
7835 (1993-2000)
  • Use: Normal
  • Capacity 60 liter
  • Check 10 hours
  • Change 24 months
7840 (1993-2000)
  • Use: Normal
  • Capacity 60 liter
  • Check 10 hours
  • Change 24 months

Additional Notes

  • The Hesston (Fiatagri) 7800 series cooling system holds 60 liters across the 7820, 7825, 7835, and 7840 variants, a capacity consistent with large agricultural tractors where substantial thermal mass is needed to manage heat from high-displacement engines under sustained field loads.
  • All four variants share an identical 60-liter cooling system capacity, meaning no differentiation exists between the lower and upper model numbers within the 1993-2000 production span.
  • The 7820 and 7825 both carry a 60-liter cooling system capacity under normal use conditions, with a check interval of 10 hours and a change interval of 24 months.
  • The 7835 and 7840 follow the same 10-hour check interval as the lower variants, placing coolant level inspection among the most frequent routine tasks in the service schedule.
  • A 10-hour check interval for coolant is notably short and reflects the demands of normal agricultural operation, where dust, debris, and temperature cycling can affect coolant condition and system integrity more rapidly than in on-road vehicles.
  • The 24-month change interval applies to all four variants under normal use conditions, meaning coolant renewal is tied to calendar time rather than operating hours, which is a common approach when coolant degradation is driven by chemical breakdown over time rather than by usage volume alone.

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