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...Engineering for rural development jelgava evaluation of hydraulic hitch system improvement janis laceklis bertmanis vilnis pirs eriks kronbergs aivars metla rozentals latvia university agriculture konekesko department technique llu lv kesko abstract in order to reduce the pressure oscillation tractors and all tractor aggregate correction parameters is used lower amplitudes can be achieved using implement as reducer equipment with hydropneumatic accumulators lets adjust stiffness damping characteristics limiting amplitude reduction increase driving speed till km h at same level which without consumes time transportation long distance l fuel a day but are consumed consumption increases by liters increasing movement speeds from saved that other agricultural work transport within working month profit obtained per eur salary economy plowing total excepting additional costs key word suspension introduction during attached plough harrow over rough road surfaces machine takes place these oscil...