Ford TW

Power steering fluid capacity & service interval

Ford TW models require power steering fluid with a capacity range of 3,5 to 3,7 liters. Service intervals include checking at 300 hours and changing at 1200 hours or 12 months. The data covers 6 configurations.

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

TypeSpecifications
TW-15 (1983-1990)
  • Use: Normal
  • Capacity 3,5 liter
  • Check 300 hours
  • Change 1200 hours/ 12 months
TW-25 (1983-1990)
  • Use: Normal
  • Capacity 3,5 liter
  • Check 300 hours
  • Change 1200 hours/ 12 months
TW-35 (1983-1990)
  • Use: Normal
  • Capacity 3,5 liter
  • Check 300 hours
  • Change 1200 hours/ 12 months
TW-10 (1979-1983)
  • Use: Normal
  • Capacity 3,5 liter
  • Check 300 hours
  • Change 1200 hours
TW-20 (1979-1983)
  • Use: Normal
  • Capacity 3,5 liter
  • Check 300 hours
  • Change 1200 hours
TW-30 (1979-1983)
  • Use: Normal
  • Capacity 3,7 liter
  • Check 300 hours
  • Change 1200 hours

Additional Notes

  • The Ford TW series power steering system holds either 3.5 or 3.7 liters of fluid, depending on the model. A capacity at this level reflects a full system fill, accounting for the reservoir, pump, and steering cylinder circuit typical of agricultural tractor hydraulic steering assemblies.
  • The TW-30 (1979-1983) carries a power steering fluid capacity of 3.7 liters, which is slightly higher than the 3.5-liter figure shared by all other models in the range across the same period.
  • The TW-10, TW-20, and TW-30 models from 1979-1983 share a check interval of 300 hours and a change interval of 1200 hours under normal use conditions, with no calendar-based interval specified alongside the hourly figure.
  • The 1983-1990 models, covering the TW-15, TW-25, and TW-35, add a 12-month calendar interval alongside the 1200-hour change interval. A dual interval like this means the fluid is due for replacement at whichever threshold is reached first, whether that is operating hours or elapsed time.
  • The 300-hour check interval is consistent across all six configurations, spanning both the 1979-1983 and 1983-1990 model generations. At a check interval, fluid level and condition are assessed rather than replaced outright.
  • The TW-35 (1983-1990) holds 3.5 liters despite being the largest-designation model in the later generation, matching the capacity of the TW-15 and TW-25 rather than carrying a higher volume.
  • All six rows are specified under normal use conditions, meaning the intervals of 300 hours for checks and 1200 hours for changes apply to standard operating environments without the shortened schedules that severe-duty classifications would typically require.

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