Ford TW

Coolant capacity & service interval

Ford TW coolant capacity ranges from 20 to 23,2 liters. Service intervals include checks at 10 hours and changes at 2400 hours or 24 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 21 liter
  • Capacity 22 liter (+ heater)
  • Check 10 hours
  • Change 2400 hours/ 24 months
TW-25 (1983-1990)
  • Use: Normal
  • Capacity 21 liter
  • Check 10 hours
  • Change 2400 hours/ 24 months
TW-35 (1983-1990)
  • Use: Normal
  • Capacity 21,5 liter
  • Capacity 23 liter (+ heater)
  • Check 10 hours
  • Change 2400 hours/ 24 months
TW-10 (1979-1983)
  • Use: Normal
  • Capacity 20 liter
  • Check 10 hours
  • Change 2400 hours/ 24 months
TW-20 (1979-1983)
  • Use: Normal
  • Capacity 20 liter
  • Check 10 hours
  • Change 2400 hours/ 24 months
TW-30 (1979-1983)
  • Use: Normal
  • Capacity 21,8 liter
  • Capacity 23,2 liter (+ heater)
  • Check 10 hours
  • Change 2400 hours/ 24 months

Additional Notes

  • The Ford TW series cooling system capacities range from 20 liters on the TW-10 and TW-20 up to 21.8 liters on the TW-30, reflecting differences in engine displacement and cooling circuit size across the lineup.
  • On the TW-15 (1983-1990), the cooling system holds 21 liters in standard configuration, rising to 22 liters when a cab heater is fitted, as the heater core and associated plumbing add volume to the circuit.
  • The TW-30 (1979-1983) carries the largest heater-equipped capacity in the series at 23.2 liters, compared to 21.8 liters without a heater, representing a difference of 1.4 liters between the two configurations.
  • The TW-35 (1983-1990) specifies 21.5 liters without a heater and 23 liters with one, figures that are slightly lower than the earlier TW-30 counterpart despite occupying the same position in the model range.
  • The TW-25 (1983-1990) lists a single capacity of 21 liters with no heater variant noted, unlike the TW-15 and TW-35 from the same generation, which both carry separate heater-equipped figures.
  • A coolant level check interval of 10 hours applies uniformly across all six TW configurations, a very short interval consistent with the demands of heavy agricultural equipment operating under sustained load conditions.
  • The coolant change interval across all TW models is set at 2400 hours or 24 months under normal use, meaning whichever threshold is reached first would trigger a service event in typical operation.
  • The 2400-hour or 24-month change interval is identical across the TW-10, TW-15, TW-20, TW-25, TW-30, and TW-35, indicating no variation in coolant service life requirements between the earlier 1979-1983 models and the later 1983-1990 generation.

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