McCormick 4600 series

Coolant capacity & service interval

McCormick 4600 series uses coolant with a capacity range of 3 to 6 liters. Service intervals require changes every 1000 hours or 12 months. The data covers 8 configurations.

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

TypeSpecifications
4630 ARM, Yanmar 3TNV76-XVA (2015-2019)
  • Use: Normal
  • Capacity 3 liter
  • Change 1000 hours/ 12 months
4630 ISM, Yanmar 3TNV76-XVA (2015-2019)
  • Use: Normal
  • Capacity 3 liter
  • Change 1000 hours/ 12 months
4645 ARM, Yanmar 3TNV88-BKVA (2015-2019)
  • Use: Normal
  • Capacity 5 liter
  • Change 1000 hours/ 12 months
4645 ISM, Yanmar 3TNV88-BKVA (2015-2019)
  • Use: Normal
  • Capacity 5 liter
  • Change 1000 hours/ 12 months
4645 VRM, Yanmar 3TNV88-BKVA (2015-2019)
  • Use: Normal
  • Capacity 5 liter
  • Change 1000 hours/ 12 months
4655 ARM, Yanmar 4TNV88-BKVA (2015-2019)
  • Use: Normal
  • Capacity 6 liter
  • Change 1000 hours/ 12 months
4655 ISM, Yanmar 4TNV88-BKVA (2015-2019)
  • Use: Normal
  • Capacity 6 liter
  • Change 1000 hours/ 12 months
4655 VRM, Yanmar 4TNV88-BKVA (2015-2019)
  • Use: Normal
  • Capacity 6 liter
  • Change 1000 hours/ 12 months

Additional Notes

  • Across the McCormick 4600 series (2015-2019), cooling system capacity varies by engine displacement rather than by trim variant. The 4630 models fitted with the Yanmar 3TNV76-XVA hold 3 liters, the 4645 models with the Yanmar 3TNV88-BKVA hold 5 liters, and the 4655 models with the Yanmar 4TNV88-BKVA hold 6 liters.
  • The step from 3 liters on the 4630 to 5 liters on the 4645 reflects the larger bore and displacement of the 3TNV88-BKVA relative to the 3TNV76-XVA, both being three-cylinder Yanmar engines. A larger displacement engine generates more heat and generally requires a proportionally greater coolant volume to maintain stable operating temperatures.
  • The 4655 models share the same 88mm bore as the 4645 but use the four-cylinder 4TNV88-BKVA rather than the three-cylinder 3TNV88-BKVA. The additional cylinder accounts for the increase in cooling system capacity from 5 liters to 6 liters.
  • Within each engine family, the ARM, ISM, and VRM trim variants carry identical cooling system capacities. The 5-liter capacity on the 4645 ARM, 4645 ISM, and 4645 VRM, for example, indicates that trim-level differences in cab configuration or transmission type do not alter the engine cooling circuit volume.
  • All eight configurations share a uniform service interval of 1,000 hours or 12 months under normal use conditions, whichever comes first. The dual-trigger structure means a machine used infrequently enough to avoid the hour threshold would still require a coolant change on an annual calendar basis.
  • A 1,000-hour coolant change interval is a moderate-length service cycle for compact utility tractors. Coolant degrades over time through additive depletion and contamination, so the 12-month calendar limit serves as a safeguard when annual operating hours fall well below the 1,000-hour mark.
  • The 6-liter capacity on the 4655 series represents a service fill volume, meaning the amount of coolant needed to refill the system during a standard coolant change. Overhaul or full drain procedures on engines with integrated block passages may require additional fluid to purge air pockets, though the specification here reflects the nominal system volume.