KTA50 Cummins Idler Gear 3628823 Parts Catalog Ref No. Part Name Part No. Required 　 Idler Gears BB6733 　 　 Idler Gear 3628822 1 1 Bushing       3004686 1 2 Idler Gear       3632363 1 3 Thrust Bearing 130083 6 　 Idler Gear 3004683 1 1 Bushing       3004686 1 4 Idler Gear       3004594 1 　 Idler Gear 3628823 1 1 Bushing       3004686 …