John Deere (Timberjack) Feller bunchers
AdBlue (DEF) capacity & service interval
John Deere (Timberjack) Feller bunchers utilize AdBlue (DEF) with a capacity of 19 liters. The data covers 2 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| 643L-II, John Deere PowerTech PSS |
|
| 843L-II, John Deere PowerTech PSS |
|
Additional Notes
- The 643L-II and 843L-II feller bunchers, both equipped with the John Deere PowerTech PSS engine, share an identical AdBlue (DEF) tank capacity of 19 liters under normal use conditions.
- A 19-liter DEF tank is a moderately sized reservoir for forestry equipment, reflecting the sustained duty cycles typical of feller buncher operations where extended refill intervals are practical.
- Both configurations are noted as running a selective catalytic reduction (SCR) system, which is the emissions control technology that consumes the AdBlue fluid to reduce nitrogen oxide output from the diesel engine.
- The capacity figure of 19 liters applies to normal use conditions in both the 643L-II and 843L-II, meaning the specification is not adjusted for severe-duty operating environments in the data provided.