Hesston (Fiatagri) 7700
Coolant capacity & service interval
Hesston 7700 coolant capacity ranges from 68 to 80 liters. Service intervals include checks every 10 hours and changes every 24 months or 800 hours. The data covers 2 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| 7730 (1986-1993) |
|
| 7735 (1986-1993) |
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Additional Notes
- The 7730 cooling system carries a capacity of 68 liters, while the 7735 cooling system holds 80 liters, reflecting a meaningful difference in engine cooling volume between the two configurations within the Hesston (Fiatagri) 7700 series.
- Both the 7730 and 7735 share a 10-hour coolant check interval under normal use conditions, placing routine inspection early in the service cycle relative to the change interval.
- The 7730 coolant change interval is specified at 24 months with no accompanying hour-based threshold, meaning the schedule is governed entirely by elapsed calendar time rather than machine hours.
- The 7735 coolant change interval combines an 800-hour threshold with a 24-month limit under normal use, so whichever of the two conditions is reached first would govern the service event.
- The 800-hour figure on the 7735 represents a substantial operational period for a coolant change interval, consistent with heavy-duty agricultural equipment that may accumulate hours at varying seasonal rates.
- Both configurations cover the 1986-1993 model year span, and the capacity and interval differences between the 7730 and 7735 indicate that the two variants were treated as distinct specifications rather than interchangeable entries.