While the base 12145 is an agricultural machine, the "Forest" designation refers to specific retrofits designed for timber work:

Features a powerful 6-cylinder Zetor diesel engine with a displacement of 417.5 cubic inches (6.8 liters). It delivers approximately 120 hp (89 kW) , making it ideal for heavy timber hauling.

A standard weight of 10,600 lbs ensures stability, while the four-wheel-drive (MFWD) system provides the necessary traction for uneven forest floors. Forestry Modifications

Equipped with a standard 16 forward and 8 reverse speed manual transmission, often including a torque multiplier for shifting under load.