Komatsu Bulldozers, D

AdBlue (DEF) capacity & service interval

Komatsu Bulldozers, D utilize AdBlue (DEF) with a capacity range of 24,8 to 60,5 liters. The data covers 5 configurations.

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

TypeSpecifications
D51EX-24, Komatsu SAA4D107E-3 (2017- )
  • Use: Normal
  • Capacity 24,8 liter
D51PX-24, Komatsu SAA4D107E-3 (2017- )
  • Use: Normal
  • Capacity 24,8 liter
D61EX-24, Komatsu SAA6D107E-3 Stage IV (2015-2021)
  • Use: Normal
  • Capacity 26,6 liter
D61PX-24, Komatsu SAA6D107E-3 Stage IV (2015-2021)
  • Use: Normal
  • Capacity 26,6 liter
D155AX-8, Komatsu SAA6D140E-7 (EU Stage IV) (2014-2021)
  • Use: Normal
  • Capacity 60,5 liter

Additional Notes

  • AdBlue, also known as Diesel Exhaust Fluid (DEF), is an aqueous urea solution used in Selective Catalyst Reduction (SCR) systems to reduce nitrogen oxide (NOx) emissions from diesel engines. All five configurations listed here are equipped with SCR systems and require AdBlue as part of normal operation.
  • The Komatsu D155AX-8 with the SAA6D140E-7 (EU Stage IV) engine carries the largest AdBlue tank capacity in the group at 60.5 liters, reflecting the greater fluid consumption associated with a larger displacement six-cylinder engine operating under EU Stage IV emissions standards.
  • The D51EX-24 and D51PX-24, both powered by the Komatsu SAA4D107E-3 engine from 2017 onward, share an identical AdBlue tank capacity of 24.8 liters. The EX and PX designations refer to different undercarriage configurations, but the shared engine results in the same fluid capacity across both variants.
  • The D61EX-24 and D61PX-24, equipped with the six-cylinder SAA6D107E-3 Stage IV engine and produced from 2015-2021, each hold 26.6 liters of AdBlue. The slight increase over the D51 series capacity aligns with the larger engine displacement of the SAA6D107E-3 compared to the four-cylinder SAA4D107E-3.
  • The SAA6D107E-3 is a six-cylinder engine, while the SAA4D107E-3 is a four-cylinder variant. The difference in AdBlue capacity between the D61 series (26.6 liters) and the D51 series (24.8 liters) corresponds directly to this difference in engine configuration.
  • All AdBlue capacities listed are specified under normal use conditions. In SCR-equipped machinery, tank capacity is sized to align with typical refill intervals relative to diesel fuel consumption, so a larger tank generally supports longer operation between AdBlue refills.

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