Sany Tracked excavators
AdBlue (DEF) capacity & service interval
Sany tracked excavators utilize AdBlue (DEF) with a capacity range of 19 to 20 liters. The data covers 3 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| SY135C, Stage V/Tier 4f (2020- ) |
|
| SY155U, Stage V (2019- ) |
|
| SY155U, Tier 4f (SY155C1I5KU) (2016-2019) |
|
Additional Notes
- The Sany tracked excavator SY135C in Stage V/Tier 4f configuration carries a 19-liter AdBlue (DEF) tank capacity, used in conjunction with a selective catalytic reduction (SCR) system to treat exhaust emissions under normal operating conditions.
- Both the Stage V and Tier 4f variants of the SY155U share an identical 20-liter AdBlue (DEF) capacity, meaning the tank size remained consistent across the emissions standard transition between the 2016-2019 and 2019 onward configurations.
- The SY155U Tier 4f variant, identified by part designation SY155C1I5KU and covering the 2016-2019 model years, pairs the 20-liter DEF capacity with an SCR system, which is the same emissions aftertreatment architecture carried forward into the later Stage V version.
- The 1-liter difference between the SY135C (19 liters) and the SY155U (20 liters) reflects a modest scaling of DEF tank size relative to the larger engine displacement and higher exhaust output of the SY155U, both operating under normal use conditions.
- All three configurations listed specify normal use conditions for the stated capacities, meaning the 19- and 20-liter figures apply to standard operating environments rather than severe-duty or extended-interval scenarios.