This paper studies the pull manufacturing system having four step distribution structure which is consisted of customer, factory, warehouse, and collaboration company. The loaded trays and empty trays are circulated through the system to supply the products to the customers. But if there is any instance making input and output unbalance, the circulation will be ceased which results in production stop because of the improper tray supply. This paper search the condition to prevent such problem by simulation. The optimal ordering and dispatching policy and tray supply chain management will be searched by controlling the oder and dispatch timing. The changes of inventory amount of each warehouse and factory are illustrated including the case of unbalance circulation. Promodel simulation language is used to implement this model.