... ZDY, ZLY and ZSY types of parallel shaft reducers and DBY, DBYK, DCY and DCYK types of vertical transmission reducers. ZDY, ZLY and ZSY types of external ... the lubrication oil before starting-up when temperature is below 0°C.Description of codes: DBY stands for reducers with bevel ... , 315, 355, 400, 450, 500, 560, 630 and 710, etc. Reduction ratio range: 6.3~20;ZSY series gear reducers are with ...