Ford 40

Power steering fluid capacity & service interval

Ford 40 uses power steering fluid with a capacity range of 56,8 to 60,6 liters. Service intervals include a check at 50 hours and a change at 1200 hours or 12 months. The data covers 12 configurations.

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

TypeSpecifications
  • 5640 (1991-1998)
  • Transaxle/hydraulic system
  • Use: Normal
  • Capacity 56,8 liter
  • Check 50 hours
  • Change 1200 hours/ 12 months
  • Code: 12/12
  • 5640 (1991-1998)
  • Transaxle/hydraulic system
  • Use: Normal
  • Capacity 60,6 liter
  • Check 50 hours
  • Change 1200 hours/ 12 months
  • Code: 16/16
  • 6640 (1991-1998)
  • Transaxle/hydraulic system
  • Use: Normal
  • Capacity 56,8 liter
  • Check 50 hours
  • Change 1200 hours/ 12 months
  • Code: 12/12
  • 6640 (1991-1998)
  • Transaxle/hydraulic system
  • Use: Normal
  • Capacity 60,6 liter
  • Check 50 hours
  • Change 1200 hours/ 12 months
  • Code: 16/16
  • 7740 (1991-1998)
  • Transaxle/hydraulic system
  • Use: Normal
  • Capacity 56,8 liter
  • Check 50 hours
  • Change 1200 hours/ 12 months
  • Code: 12/12
  • 7740 (1991-1998)
  • Transaxle/hydraulic system
  • Use: Normal
  • Capacity 60,6 liter
  • Check 50 hours
  • Change 1200 hours/ 12 months
  • Code: 16/16
  • 7840 (1991-1998)
  • Transaxle/hydraulic system
  • Use: Normal
  • Capacity 56,8 liter
  • Check 50 hours
  • Change 1200 hours/ 12 months
  • Code: 12/12
  • 7840 (1991-1998)
  • Transaxle/hydraulic system
  • Use: Normal
  • Capacity 60,6 liter
  • Check 50 hours
  • Change 1200 hours/ 12 months
  • Code: 16/16
  • 8240 (1991-1998)
  • Transaxle/hydraulic system
  • Use: Normal
  • Capacity 56,8 liter
  • Check 50 hours
  • Change 1200 hours/ 12 months
  • Code: 12/12
  • 8240 (1991-1998)
  • Transaxle/hydraulic system
  • Use: Normal
  • Capacity 60,6 liter
  • Check 50 hours
  • Change 1200 hours/ 12 months
  • Code: 16/16
  • 8340 (1991-1998)
  • Transaxle/hydraulic system
  • Use: Normal
  • Capacity 56,8 liter
  • Check 50 hours
  • Change 1200 hours/ 12 months
  • Code: 12/12
  • 8340 (1991-1998)
  • Transaxle/hydraulic system
  • Use: Normal
  • Capacity 60,6 liter
  • Check 50 hours
  • Change 1200 hours/ 12 months
  • Code: 16/16

Additional Notes

  • The Ford 40 Series tractors (5640, 6640, 7740, 7840, 8240, and 8340) share a unified transaxle/hydraulic/power steering system, meaning a single fluid reservoir serves all three functions simultaneously rather than maintaining separate dedicated circuits.
  • Two capacity figures appear across all six models in the 1991-1998 range: 56.8 liters and 60.6 liters. The 3.8-liter difference between the two values likely reflects different transmission or axle configurations within each model, such as a standard versus a more heavily specified drivetrain variant.
  • A capacity of 56.8 liters is listed under normal use conditions for the 5640, 6640, 7740, 7840, 8240, and 8340, each covering the full 1991-1998 production span.
  • A capacity of 60.6 liters is also listed under normal use conditions for the same six models across the same 1991-1998 span, indicating a second configuration exists within each model line.
  • The fluid check interval is set at every 50 hours of operation under normal use conditions across all listed models and both capacity variants. At typical agricultural working rates, 50 hours can represent only a few weeks of active seasonal use, making frequent level verification a routine part of operation.
  • The fluid change interval is specified at 1,200 hours or 12 months, whichever comes first, under normal use conditions. The dual-trigger format means calendar time alone can mandate a change even when hour accumulation has not reached the threshold, which is relevant for lower-utilization machines.
  • The 1,200-hour change interval applies uniformly to both the 56.8-liter and 60.6-liter configurations across all six models, with no variation tied to capacity size or model designation within the 40 Series range.

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