Komatsu Forklift trucks, diesel - BX20 series, -14

Coolant capacity & service interval

Komatsu Forklift trucks, diesel - BX20 series, -14 utilize coolant with a capacity of 9,5 liters. Service intervals include checks every 8 hours and changes every 12 months or 2400 hours. The data covers 6 configurations.

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

TypeSpecifications
FD20T-14, Komatsu 4D94E
  • Use: Normal
  • Capacity 9,5 liter
  • Check 8 hours
  • Change 12 months/ 2400 hours
FD20TUS-14, Komatsu 4D94E
  • Use: Normal
  • Capacity 9,5 liter
  • Check 8 hours
  • Change 12 months/ 2400 hours
FD25T-14, Komatsu 4D94E
  • Use: Normal
  • Capacity 9,5 liter
  • Check 8 hours
  • Change 12 months/ 2400 hours
FD25TUS-14, Komatsu 4D94E
  • Use: Normal
  • Capacity 9,5 liter
  • Check 8 hours
  • Change 12 months/ 2400 hours
FD30T-14, Komatsu 4D94E
  • Use: Normal
  • Capacity 9,5 liter
  • Check 8 hours
  • Change 12 months/ 2400 hours
FD30TUS-14, Komatsu 4D94E
  • Use: Normal
  • Capacity 9,5 liter
  • Check 8 hours
  • Change 12 months/ 2400 hours

Additional Notes

  • All six models in the Komatsu BX20 series covered here are equipped with the Komatsu 4D94E engine, and all share an identical cooling system capacity of 9.5 liters.
  • A 9.5-liter cooling system capacity is typical for a compact industrial diesel engine in this class, representing the total volume of the cooling circuit including the engine block, cylinder head passages, and radiator.
  • The 8-hour check interval corresponds to a single standard operator shift, meaning coolant level is verified at the start or end of each working day rather than on a periodic maintenance schedule.
  • The change interval is expressed as 12 months or 2,400 hours, whichever comes first. The dual-trigger format accounts for calendar degradation of coolant additives independent of machine usage.
  • 2,400 hours at a standard single-shift operation of roughly 2,000 hours per year means the time-based trigger of 12 months will typically be reached before the hour-based threshold under normal workloads.
  • All six configurations carry normal use conditions for the cooling system, meaning the intervals listed apply to standard operating environments rather than elevated-stress or extreme-temperature duty cycles.
  • The FD20T-14 and FD20TUS-14 share the same 9.5-liter capacity despite the "US" suffix denoting a variant designation, indicating the cooling circuit architecture is unchanged between those two configurations.
  • The same pattern holds across the FD25 and FD30 pairings, where the standard and US-suffix variants within each load class carry identical cooling system specifications, reflecting a common engine and cooling layout across the series.

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