... diesel engine with belt pulley of φ270. Driven by dynamo at 1450 loops/min, the belt pulley ofφ188 is used ... the age of the diesel engine. If the engine runs at 2000 loops/min, the belt pulley is φ135-140. The ... motive power and corresponded protection hood is at the customer’s discretion.2. Operation PrincipleThe crops fed in ...