The Maintenance is a job which needed skill for Unit Drived or Car. Job of Maintenance is heating the unit, fuel charging, checking for unit completeness. The increased of export in indonesian, maintenance did checking for unti completeness in the Port also. After completed, the next process unloading unit is accept process unit from Port. Next loading process unit is raised unit to sent to customer/export. The finish step from this process is delivery/moving unit.