Caterpillar Rigid dump trucks

AdBlue (DEF) capacity & service interval

Caterpillar rigid dump trucks use AdBlue (DEF) fluid with a capacity of 22 liters. The data covers 6 configurations.

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

TypeSpecifications
770G Tier 4f/Stage V, KD2 (2022- )
  • Use: Normal
  • Capacity 22 liter
770G Tier 4f/Stage V, KDH (2022- )
  • Use: Normal
  • Capacity 22 liter
772G Tier 4f/Stage IV, KEX (2022- )
  • Use: Normal
  • Capacity 22 liter
772G Tier 4f/Stage IV, RME (2019- )
  • Use: Normal
  • Capacity 22 liter
770G Tier 4f/Stage IV, RMA (2018- )
  • Use: Normal
  • Capacity 22 liter
772G Tier 4f/Stage IV, KE3 (2018- )
  • Use: Normal
  • Capacity 22 liter

Additional Notes

  • All six configurations listed across the Caterpillar 770G and 772G rigid dump truck lines carry an AdBlue (DEF) tank capacity of 22 liters, applying uniformly regardless of emission tier designation or serial number prefix.
  • The 22-liter figure represents the total fluid capacity of the selective catalytic reduction (SCR) system reservoir, which holds diesel exhaust fluid used to reduce nitrogen oxide emissions in Tier 4 Final and Stage IV/V compliant engines.
  • All capacity values are specified under normal use conditions, meaning the 22-liter figure applies to standard operating environments rather than severe-duty or extended-interval service scenarios.
  • The Caterpillar 770G carries three distinct configurations in the specifications: the RMA prefix variant introduced in 2018, and the KD2 and KDH prefix variants both introduced in 2022, all sharing the same 22-liter DEF capacity despite differing emission stage designations between Stage IV and Stage V.
  • The 772G, a larger model in the rigid dump truck line, is represented by three serial number prefix variants: KE3 from 2018, RME from 2019, and KEX from 2022, each also specifying a 22-liter DEF tank capacity under normal use conditions.
  • The Stage V designation appearing on the 770G KD2 and KDH configurations reflects a stricter European emissions standard compared to the Tier 4 Final/Stage IV standard, yet the DEF system capacity remains unchanged at 22 liters across both standards.
  • The RME-prefix 772G, introduced in 2019, is the only configuration across both models with a starting year between the 2018 and 2022 entries, placing it as a mid-range introduction within the specification set while still sharing the common 22-liter capacity.

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