Ford 40

Coolant capacity & service interval

Ford 40 coolant capacity ranges from 16 to 21,5 liters. Service intervals occur every 1200 hours or 24 months. The data covers 6 configurations.

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

TypeSpecifications
5640 (1991-1998)
  • Use: Normal
  • Capacity 16 liter
  • Change 1200 hours/ 24 months
6640 (1991-1998)
  • Use: Normal
  • Capacity 16 liter
  • Change 1200 hours/ 24 months
7740 (1991-1998)
  • Use: Normal
  • Capacity 16 liter
  • Change 1200 hours/ 24 months
7840 (1991-1998)
  • Use: Normal
  • Capacity 21,5 liter
  • Change 1200 hours/ 24 months
8240 (1991-1998)
  • Use: Normal
  • Capacity 21,5 liter
  • Change 1200 hours/ 24 months
8340 (1991-1998)
  • Use: Normal
  • Capacity 21,5 liter
  • Change 1200 hours/ 24 months

Additional Notes

  • The Ford 40 series cooling system capacity splits into two distinct values across the model range: the 5640, 6640, and 7740 hold 16 liters, while the 7840, 8240, and 8340 each hold 21.5 liters.
  • The 5.5-liter difference between the two capacity groups reflects the larger engine displacement found in the 7840, 8240, and 8340, which requires a greater volume of coolant to maintain operating temperatures across a bigger block.
  • All six models share an identical service interval of 1,200 hours or 24 months under normal use conditions, whichever comes first.
  • The dual-format interval, expressed in both operating hours and calendar months, is standard practice for agricultural equipment, where seasonal or low-hour machines might reach the time limit before the hour threshold.
  • The 16-liter capacity on the 5640, 6640, and 7740 applies to the full cooling system fill, meaning the figure accounts for the radiator, engine block passages, and hoses collectively rather than any single component alone.
  • The 21.5-liter capacity on the Ford 40 7840, 8240, and 8340 represents one of the larger cooling system volumes in the series, consistent with the greater thermal load generated by higher-output engines in those models.
  • All specifications listed apply to the 1991-1998 production span for each respective model, with no variation in capacity or interval noted within those years for any individual model.

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