John Deere Full size front mower

Coolant capacity & service interval

John Deere Full size front mower coolant capacity ranges from 6,6 to 7,1 liters. Service intervals include checks at 5 and 10 hours and a change at 600 hours. The data covers 4 configurations.

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

TypeSpecifications
1420 PIN (010001-) (2002-2005)
  • Use: Normal
  • Capacity 6,6 liter
  • Check 10 hours
  • Change 600 hours
1425 PIN (010001-) (2000-2005)
  • Use: Normal
  • Capacity 6,6 liter
  • Check 5 hours
  • Change 600 hours
1435 PIN (010001-) (2000-2005)
  • Use: Normal
  • Capacity 6,6 liter
  • Check 5 hours
  • Change 600 hours
1445 PIN (010001-) (2000-2005)
  • Use: Normal
  • Capacity 7,1 liter
  • Check 5 hours
  • Change 600 hours

Additional Notes

  • The John Deere 1420, 1425, and 1435 front mowers share a cooling system capacity of 6.6 liters, while the 1445 requires a slightly larger fill of 7.1 liters.
  • A 7.1-liter cooling system capacity on the 1445 indicates a larger or more thermally demanding engine configuration compared to the other models in the same lineup.
  • All four models carry a 600-hour coolant change interval under normal use conditions, meaning routine operation without exposure to unusually harsh environmental or load factors.
  • The 1420 specifies a coolant level check every 10 hours, which is a longer inspection interval than the 5-hour check interval shared by the 1425, 1435, and 1445.
  • A 5-hour coolant check interval, as seen on the 1425, 1435, and 1445, reflects a relatively frequent monitoring schedule, consistent with the demands of commercial-grade mowing equipment operating under continuous load cycles.
  • The 1420 PIN (010001-) carries a model year range starting from 2002, making it the latest introduction among the four models covered in the 2000-2005 period.

Other Systems