McCormick G-MAX II

Coolant capacity & service interval

McCormick G-MAX II coolant capacity is 29 liters. Service intervals are 2000 hours or 24 months. The data covers 4 configurations.

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

TypeSpecifications
G125 MAX II, FPT NEF 6.7 (T3) (2021- )
  • Use: Normal
  • Capacity 29 liter
  • Change 2000 hours/ 24 months
G135 MAX II, FPT NEF 6.7 (T3) (2021- )
  • Use: Normal
  • Capacity 29 liter
  • Change 2000 hours/ 24 months
G145 MAX II, FPT NEF 6.7 (T3) (2021- )
  • Use: Normal
  • Capacity 29 liter
  • Change 2000 hours/ 24 months
G165 MAX II, FPT NEF 6.7 (T3) (2021- )
  • Use: Normal
  • Capacity 29 liter
  • Change 2000 hours/ 24 months

Additional Notes

  • All four McCormick G-MAX II variants covered here — the G125, G135, G145, and G165 — share an identical cooling system capacity of 29 liters, which reflects the total volume of the entire cooling circuit rather than a partial service top-up figure.
  • The uniform 29-liter capacity across the G125 MAX II, G135 MAX II, G145 MAX II, and G165 MAX II is consistent with all four models being powered by the same FPT NEF 6.7 Tier 3 engine, meaning the cooling system architecture does not vary between power ratings in the lineup.
  • The coolant change interval is specified at 2000 hours or 24 months under normal use conditions, whichever comes first, applying equally across all four variants.
  • A dual-trigger interval of 2000 hours and 24 months means that calendar time can become the governing factor for operators who accumulate lower annual hours, while high-utilization machines will reach the hour threshold before the time limit expires.
  • The 2000-hour interval is relatively long by agricultural equipment standards, which is characteristic of modern extended-life coolant formulations designed to maintain corrosion inhibitor effectiveness over prolonged service periods.

Other Systems