McCormick X6.6 Series

Automatic transmission fluid capacity & service interval

McCormick X6.6 Series requires automatic transmission fluid with a capacity of 101 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- )
  • Hydraulic system
  • Use: Normal
  • Capacity 101 liter
  • Check 10 hours
  • Change 1000 hours/ 12 months
  • X6.618 Xtrashift, stage V / Tier 4f (2023- )
  • Hydraulic system
  • Use: Normal
  • Capacity 101 liter
  • Check 10 hours
  • Change 1000 hours/ 12 months

Additional Notes

  • The McCormick X6.6 Series carries a transmission/hydraulic system fluid capacity of 101 liters, a figure that reflects a combined transmission and hydraulic circuit sharing a common fluid reservoir rather than separate dedicated sumps.
  • Both the X6.616 Xtrashift and X6.618 Xtrashift share an identical 101-liter capacity, indicating no volumetric difference between the two power variants within the Xtrashift configuration.
  • A fluid level check interval of 10 operating hours is specified under normal use conditions, placing routine inspection well within the early stages of a standard working week for a machine in regular field operation.
  • The change interval under normal use is set at 1,000 hours or 12 months, whichever comes first, meaning calendar time can trigger a fluid change even when the hour threshold has not been reached.
  • The 1,000-hour drain interval is associated with the Xtrashift transmission type, which is a power-shift or semi-powershift gearbox design where fluid condition directly affects clutch pack performance and hydraulic response.

Other Systems