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1.转速为何不稳因调速弹簧张缩频繁,使飞锤支架、调速器弹簧座与调速弹簧接触面自然磨损,改变了飞锤离心力与调速弹簧弹力的平衡系数,引起转速不稳定。只须将调速弹簧座凸起端车削0.5～1毫米,转速即可恢复正常。 2.气门为何被烧蚀因进、排气门一样大,安装时难以辨别,误将进气门当作捧气门用,结果烧蚀气门。注意分辩气门杆上的记号,一般有“P”的是捧气门,有“J”的是进气门;也有的生产厂只在排气门杆上做一记号,以示区别。 3.气门为何不能全开因气门导管总长为48毫米,若装入缸盖深度不够(25毫米左右),致使气门降不到最低位置而不能全开。
1. why the instability speed governor spring shrinking frequently, so that the fly hammer bracket, governor spring seat and the governor spring contact surface natural wear and tear, changing the flywheel centrifugal force and speed spring balance coefficient of elasticity, causing the speed is not stable. Only the speed adjustment spring seat raised end turning 0.5 ~ 1 mm, speed can be restored to normal. 2. Why the valve was ablated due to into, exhaust valve as large, difficult to distinguish the installation, mistakenly regarded as the intake valve with the valve, the results of the ablation valve. Attention to distinguish the mark on the valve stem, there is usually “P ” is holding the valve, “J ” is the intake valve; also some manufacturers only make a mark on the exhaust valve stem to show the difference . 3. Why the valve can not be fully opened due to the total length of the valve guide 48 mm, if the depth of the cylinder head is not enough (about 25 mm), resulting in less than the minimum position of the valve can not be fully open.