The gearboxes series are used mainly for connecting hydraulic pumps to the energy take-offs of agricultural tractors. PTO result, standardized at either 540 or 1,000 rpm, is, in this 
way, increased to the best working speeds for the hydraulic pumps. RD group of gearboxes are used to reduce hydraulic motor speed.
ML and B series gearboxes supply the connection for hydraulic pumps to low rate tractor power remove. The standard power take off quickness of 540 rpm, is definitely improved by the gearbox ratio to ideal speed conditions necessary for the pump. Different inputs are recognized under Hydraulic PTO Drive Gearbox Spped Increaser condition that the result speeds don’t go over 3000 rpm.