Technical specifications

Name 644K

Description Wheel Loader

Peak Power (ISO 9249) Net 167 kW (224 hp) at 1,700 rpm 

Gross 175 kW (234 hp) at 1,700 rpm 

Peak Torque (ISO 9249)

Net 985 Nm (726 lb.-ft.) at 1,400 rpm 

Gross 1024 Nm (755 lb.-ft.) at 1,400 rpm 

Net Torque Rise 44% 

Fuel System (electronically controlled) High-pressure common rail 

Lubrication Full-flow spin-on filter and integral cooler 

Aspiration Turbocharged, charge air cooled 

Air Cleaner Under-hood, dual-element dry type, restriction indicator in cab monitor for service

Cooling

Fan Drive Hydraulically driven, proportionally controlled, fan aft of coolers