CCN explanation CCN (CLAAS Component Number) 146588-001 Hydraulic system standard 1044-004 In the hydraulic systems standard, the components are subdivided according to their function, using number ranges. 00 0296 433 2 - RHB Dieselmotor OM906/926LA - 10/2014 33 Pos. Component 1000 Oil reservoir / oil filter / oil cooler 2000 Pump / motor 3000 Hydraulic cylinder 4000 Restrictor / orifice plate 5000 Pressure accumulator 6000 Valve - mechanically actuated 7000 Valve - hydraulically actuated 8000 Couplings / connections 9000 Measuring point / gauge