For LW321F, have different assemble types :1. stardard model : yuchai engine , bucket capacity 1.8cbm 2.high unloading model :yuchai engine,bucket capacity : 1.5cbm 3.grass fork model :yuchai engine, bucket is optional parts.4.side dumping model : yuchai engine, with side dump bucket 5.pallet fork model :yuchai engine ,bucket is optional parts .Air conditioner is optional for this model .