McCormick X6.6 Series

Coolant capacity & service interval

McCormick X6.6 Series uses coolant with a capacity of 27 liters. Service intervals include checking every 10 hours and changing every 1000 hours or 12 months. The data covers 2 configurations.

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

TypeSpecifications
X6.616 Xtrashift, stage V / Tier 4f (2023- )
  • Use: Normal
  • Capacity 27 liter
  • Check 10 hours
  • Change 1000 hours/ 12 months
X6.618 Xtrashift, stage V / Tier 4f (2023- )
  • Use: Normal
  • Capacity 27 liter
  • Check 10 hours
  • Change 1000 hours/ 12 months

Additional Notes

  • Both the X6.616 and X6.618 Xtrashift variants share an identical cooling system capacity of 27 liters, which represents the total volume of coolant the system holds during normal service fills.
  • The check interval is set at 10 hours of operation, reflecting how frequently the coolant level is to be verified rather than replaced.
  • The change interval for both variants is 1000 hours or 12 months under normal use conditions, meaning whichever threshold is reached first would govern when a full coolant replacement is due.
  • The McCormick X6.6 Series Stage V / Tier 4f emissions classification applies to both the X6.616 and X6.618, and both share the same coolant service schedule, indicating no differentiation in cooling system servicing between the two engine output levels within the Xtrashift transmission configuration.

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