McCormick G-Max

Clutch fluid capacity & service interval

The McCormick G-Max uses clutch fluid with a capacity of 1 liter. The data covers 5 configurations of this model.

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

TypeSpecifications
G125 MAX, FPT NEF 6.7 (T3) (2007-2014)
  • Use: Normal
  • Capacity 1 liter
G135 MAX, FPT NEF 6.7 (T3) (2007-2014)
  • Use: Normal
  • Capacity 1 liter
G145 MAX, FPT NEF 6.7 (T3) (2007-2014)
  • Use: Normal
  • Capacity 1 liter
G165 MAX, FPT NEF 6.7 (T3) (2007-2014)
  • Use: Normal
  • Capacity 1 liter
G180 MAX, FPT NEF 6.7 (T3) (2007-2014)
  • Use: Normal
  • Capacity 1 liter

Additional Notes

  • The McCormick G-Max clutch fluid system is identified as a hydraulic clutch system across all five configurations spanning the 2007-2014 model years.
  • A uniform capacity of 1 liter applies to the G125 MAX, G135 MAX, G145 MAX, G165 MAX, and G180 MAX, each paired with the FPT NEF 6.7 Tier 3 engine.
  • In a hydraulic clutch system, the fluid capacity of 1 liter reflects the volume held within the master cylinder reservoir, lines, and slave cylinder rather than a larger transmission or hydraulic circuit.
  • The 1-liter figure is consistent across all power variants in the G-Max range, from the lower-output G125 MAX to the higher-output G180 MAX, indicating the hydraulic clutch circuit does not scale in volume with engine output.
  • All five configurations carry a normal use condition designation, meaning the 1-liter capacity specification applies under standard operating conditions rather than a severe-duty or first-fill scenario.

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