A.變幅支承扭擺嚴重B.行走支承扭擺嚴重C.回轉支承扭擺嚴重D.臂架和塔身扭擺嚴重
A.回轉支承有異響B.行走支承有異響C.變幅支承有異響D.起升機構有異響
A.臂架小車滑行或抖動B.變幅小車滑行或抖動C.制動小車滑行或抖動D.回轉小車滑行或抖動