John Deere 1 series

Coolant capacity & service interval

John Deere 1 series uses coolant with a capacity range of 3,7 to 4,6 liters. Service intervals include checking every 10 hours and changing every 2000 hours or 24 months. The data covers 3 configurations.

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

TypeSpecifications
1025R (2015- )
  • Use: Normal
  • Capacity 3,7-4,6 liter
  • Check 10 hours
  • Change 2000 hours/ 24 months
1023E (2011- )
  • Use: Normal
  • Capacity 3,7-4,6 liter
  • Check 10 hours
  • Change 2000 hours/ 24 months
1026R (2011- )
  • Use: Normal
  • Capacity 3,7 liter
  • Check 10 hours
  • Change 2000 hours/ 24 months

Additional Notes

  • The John Deere 1 Series cooling system capacity is specified as a range of 3.7–4.6 liters on the 1023E and 1025R, while the 1026R carries a fixed capacity of 3.7 liters. A range value typically reflects variation between a partial drain-and-fill service and a full system overhaul, whereas a fixed value indicates a single defined fill volume regardless of service type.
  • All three models share a coolant check interval of every 10 hours of operation under normal use conditions, reflecting how frequently the cooling system level should be verified during regular service.
  • The coolant change interval across all three models is 2000 hours or 24 months under normal use, whichever comes first. The dual-trigger format means calendar time can mandate a change even when the hour threshold has not been reached, which is common on equipment used infrequently.
  • The 1023E, starting from 2011, and the 1025R, starting from 2015, share an identical capacity specification of 3.7–4.6 liters, despite being introduced in different model years. The 1026R, also starting from 2011, diverges from both with a narrower single-value capacity of 3.7 liters, suggesting a difference in engine or cooling circuit design.