Could you please provide some more context about the issue being described? It is not clear what specific machine or equipment is being referred to, nor what the Rear section and front suction nozzle are supposed to be doing in this context. Additionally, the sensor X30 and machine code KM-ASSY
The solution for the described error is to check the sensor X30. If the sensor reads out of bounds or is damaged, it can cause the rear section of the machine to press the cylinder abnormally, and the front suction no