Grab Maintenance: In order to better manage the grab, guarantee production and ensure the safety of Shaanxi mine grabs, according to people involved grabs the use, maintenance and repair of the composition, scope of work and working procedures, especially the development of safeguard clauses. Grab fuel should be arranged every day; every Monday, Thursday arrange Grab bolster portion refueling. Grab scrapped: Shandong mine grabs, pins or components with a lock pin shaft hole should be scrapped and the wear amount of each hinge pin hole at the node grab up to 10% when the original size. When closed grab grab Hebei mine clearance, cutting edge plate dislocation and bucket mouth at the contact gap of more than 5mm or the maximum length exceeds 300mm, after repair still hard to meet the requirements, the machine body should be scrapped.