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拖拉机缸盖在使用中常见的损坏有:进排气门座口之间出现裂纹;气门座与燃烧室间、气门座与水道孔间、螺丝孔与水道孔间、螺丝孔或水道孔与边缘之间出现裂纹;气门杆折断;缸盖被气门头顶坏;水套外壁冻裂及气门口磨损超限等缺陷。典型损坏为进排气门口之间裂纹,因在缸盖的加工平面上,焊后要求加工,在焊补工艺的选择上力求避免白口组织。缺陷部位又是处于缸盖中间,
Tractor cylinder head in the use of common damage: There are cracks between the intake and exhaust valve seat openings; valve seat and the combustion chamber between the valve seat and waterway holes, screw holes and waterway holes, screw holes or waterway holes and edges Between the crack; valve stem broken; cylinder head is badly damaged by the valve head; water jacket wall cracking and excessive wear and tear and other defects valve door. Typical damage to the intake and exhaust cracks between the door, because the cylinder head machining surface, after welding requirements processing, welding process selection to avoid the white mouth organizations. Defective site is in the middle of the cylinder head,