The D10 engine was in November 2003 replaced by the D9 engine in A25D and A30D. The New D9 engine is a 9,4 litre engine (to be compared with 9,6 litre on the D10) derived from the same cutting edge technology as the well-proven D12 used in A35D and A40D. The D9 engine metUS (EPA) step 2, California (CARB) step 2 and Europe (EU) step 2. With this new engine the products were prepared for coming emission standards and requirements for Tier 3.
In order to meet the Tier 3 / Stage IIIA legislation concerning exhaust emissions, a new version of the Volvo D9 engine was developed for A25D–A30D.
Volvo Advanced Combustions Technology, V-ACT, was introduced on the new D9 engine. The new D9B engine met US (EPA) Tier 3, California (CARB) Tier 3 and Europe (EU) stage IIIA emission standards.
The D9B engine was implemented on the US market in November 2005 and the EU market started from January 2006. A Tier 2/Step II compliant D9A engine continued to be available for selected markets.
Engine: Volvo D9B AC E3
Rated output at: 31.7 r/s (1,900 r/min)
SAE J1349 gross power: 252 kW (343 hp)
SAE J1349 net power: 251 kW (341 hp)
Max torque at: 20 r/s (1,200 r/min)
SAE J1349 gross torque: 1,700 Nm
SAE J1349 net torque: 1,689 Nm
Max speed: 53 km/h
Load capacity SAE struck: 13.6 m³
Load capacity SAE 2:1 heap: 17.5 m³
Payload: 28 t
Net weight: 23.1 t
Gross weight: 51.1 t
