Komatsu Articulated dump trucks, HA/HM

AdBlue (DEF) capacity & service interval

Komatsu Articulated dump trucks, HA/HM use AdBlue (DEF) fluid with a capacity of 33 liters. The data covers 2 configurations.

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

TypeSpecifications
HM300-5, Komatsu SAA6D125E-7 (2015-2021)
  • Use: Normal
  • Capacity 33 liter
HM400-5, Komatsu SAA6D140E-7 (2015-2021)
  • Use: Normal
  • Capacity 33 liter

Additional Notes

  • Both the HM300-5 and HM400-5 share an identical AdBlue tank capacity of 33 liters, despite being paired with different engines — the SAA6D125E-7 and the SAA6D140E-7 respectively.
  • The 33-liter capacity figure represents the total tank fill volume for the Selective Catalyst Reduction system, which is the onboard reservoir that holds the urea-water solution used to reduce nitrogen oxide emissions in the exhaust stream.
  • The Komatsu HM300-5 and HM400-5 AdBlue specifications apply under normal use conditions, meaning the 33-liter capacity is associated with standard operating environments rather than severe-duty cycles.
  • A 33-liter AdBlue tank is a relatively large reservoir by heavy equipment standards, which is consistent with the high-displacement engines found in articulated dump trucks of this class, as larger engines consume DEF at higher rates during operation.
  • The SAA6D125E-7 and SAA6D140E-7 engines both fall within the Tier 4 Final / Stage IV emissions compliance generation, which is the regulatory context in which SCR systems and AdBlue requirements became standard on machines of this type for the 2015-2021 period.

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