1、柱塞副技术状态的检查与判断(1)观察法:观察磨损最严重部位的痕迹,用指甲横向划动时有明显感觉者,应换新件。(2)经验法:将柱塞副用柴油清洗干净,并使套内充满柴油,用手指把柱塞套上的进油孔、回油孔和中心孔都堵严,再将柱塞抽出1/3的长度后放松,若能立即返回去,说明能继续使用;否则,应换新件。(3)压力表检查法:在泵头上 1, check and determine the technical status of the plunger (1) observation: observation of the most worn parts of the traces of nails when there is a clear sense of horizontal stroke, should be new pieces. (2) experience: the plunger pair with diesel oil clean, and the sleeve is full of diesel, put the plunger sleeve on the inlet hole, back to the oil hole and the center hole are blocked, and then the plunger out of 1 / 3 after the length of relaxation, if you can immediately go back, that can continue to use; otherwise, should be new. (3) pressure gauge inspection method: the pump head