McCormick A-MAX

Differential fluid capacity & service interval

McCormick A-MAX differential fluid capacity is 7,5 liters. Service intervals occur every 1000 hours or 12 months. The data covers 3 configurations.

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

Type	Specifications
A75 MAX, Perkins 1104C-44 (T2) (2016-2021) Front	Use: Normal Capacity 7,5 liter Change 1000 hours/ 12 months Code: (4x4)
A80 MAX, Perkins 1104D-44 (T3) (2016-2021) Front	Use: Normal Capacity 7,5 liter Change 1000 hours/ 12 months Code: (4x4)
A90 MAX, Perkins 1104D-44T (T3) (2016-2021) Front	Use: Normal Capacity 7,5 liter Change 1000 hours/ 12 months Code: (4x4)

The front differential capacity across the A75 MAX, A80 MAX, and A90 MAX variants is 7.5 liters, a figure that reflects a service fill volume typical of a front axle differential housing rather than a full overhaul or disassembly refill.
The McCormick A-MAX front differential service interval is set at 1,000 hours or 12 months, whichever comes first, meaning both an operational threshold and a calendar limit govern when fluid replacement is due.
The 12-month calendar interval applies regardless of hours accumulated, so a machine used infrequently enough to remain below 1,000 hours within a year would still reach its service point at the annual mark.
All three engine configurations covered in the 2016-2021 range, the Perkins 1104C-44 in the A75 MAX and the Perkins 1104D-44 and 1104D-44T in the A80 MAX and A90 MAX respectively, share an identical front differential capacity and change interval, indicating no variation in front axle specification across the Tier 2 and Tier 3 engine generations within the A-MAX lineup.
The service intervals listed apply under normal use conditions, meaning the 1,000-hour and 12-month thresholds are not adjusted for any alternative operating environment within the specifications provided.