Check for crack distributor lid, internal electrode are erosion, wear, the Center carbon rod is stuck with delays, loss or serious worn, and test whether the leakage, tracking ; demolished the seizure Sweeper Deputy engine spark plugs, and note whether the electrode gaps, model, and is not replaced on a regular basis. Road Sweeper is working at the time of routine maintenance, the project easy to be ignored by service or maintenance technician, at the time of your road Sweeper entered the maintenance depot, maintenance check must take the initiative to remind personnel maintenance of the project.