近几年下乡修理机械,曾发现不少红卫—12型手扶拖拉机的手扶架在第一道横梁前处断裂。断裂的原因主要是由于使用维护不当,有些机手开车前不检查各部螺栓的松紧度,使用中常出现手扶拖拉机左右弯梁焊合件固定螺栓松动,支撑杆螺母松动,手扶把压铁固定螺栓松动及发动机机架螺栓松动和没有橡皮垫等,从而造成手扶架第一道 In recent years, repair machinery to the countryside, have found that many Hongwei -12 walking tractor handrails in front of the first beam fracture. The reasons for the fracture are mainly due to improper use and maintenance. Some drivers do not check the tightness of the bolts of each department before driving. The tractor is often used to flex the left and right bent beam fittings. The fixing bolts are loose. The support rods are loose. Loose bolts and the engine frame bolts loose and no rubber pads, resulting in the first handrail