1.Cooling way: Oil pump; Cooling coil ( internal cooling); Cooler( cooling water jacket) 2.Efficiency transmission, low noise. ... the items are treated by forced lubrication and cooling system except very few small specification products.ZLYJ ... transmission, low noise, operation long time..Cooling way: Oil pump; Cooling coil ( internal cooling); Cooler( cooling water jacket)Capacity Sheet of ZLYJ ...