Hey,i have same Landini '83 year of production,and i have problem with hydraulic system.When use my tipper trailer it lifts my box very very slow,so can you tell what is best oil for his hydraulic-differential system beacause it is same tank underneeth drivers seat.And can you show commands for hydraulics,exactly two witches underneeth driver seats i thing one is for swithing from tiping to liftin and other for choosing speed of tipper