Avoid blocking of one-way valve and vent valve: as a result, the temperature in the case will rise, the oil and gas will fill the whole space and cannot be discharged, which will increase the pressure in the case, increase the consumption of lubricating oil and shorten the replacement period. After the engine ventilation system of concrete mixer truck is blocked, the movement resistance of piston is increased and the fuel consumption is increased. Because of the pressure difference between the inside and outside of the case, oil leakage often occurs at the weak part of the seal. Therefore, it is necessary to regularly inspect, dredge and clean the small concrete mixer;

▌重視襯墊作用：小型水泥自動攪拌車靜置部位零部件之間的襯墊起著防漏密封作用。若在材料、制作質量及安裝上不符合技術規范，就起不到密封防漏作用，甚至發生事故。如油底殼或氣門罩蓋，由于接觸面積大而不易壓實，由此造成漏油；

▌ pay attention to the liner function: the gasket between the stationary parts of the small concrete mixer plays a leak proof and sealing role. If the material, manufacturing quality and installation do not meet the technical specifications, it will not play a role in sealing and leakage prevention, and even accidents will occur. For example, the oil pan or valve cover is not easy to compact due to its large contact area, resulting in oil leakage;

▌小型水泥自動攪拌車上各類緊固螺母都需按規定的扭矩擰緊：過松壓不緊襯墊會滲漏；過緊又會使螺孔周圍金屬凸起或將絲扣努而引起漏油。另外，油底殼放油螺塞若未擰緊或回松脫落，容易造成機油流失，繼而發生“燒瓦抱軸”的機損事故；

▌ all kinds of fastening nuts on the small concrete mixer truck should be tightened according to the specified torque: the gasket will leak if it is too loose or not tight; if it is too tight, the metal around the screw hole will bulge or the screw thread will buckle and cause oil leakage. In addition, if the oil drain plug of the oil pan is not tightened or loosened and falls off, it is easy to cause oil loss, and then the engine damage accident of "burning bush and holding shaft" will occur;

▌避免水泥自動攪拌車輪轂甩油：輪轂軸承及腔內潤滑油脂過多，或其油封裝配不妥，質量不良及老化失效；制動頻繁引起的輪轂溫度過高；車軸螺母松動等都會引起小型水泥自動攪拌車輪轂甩油。因此要用“空腔潤滑法”，疏通通氣孔；

▌ avoid wheel hub oil spilling of concrete mixer: excessive lubricating grease in hub bearing and cavity, or improper oil packaging, poor quality and aging failure; high temperature of wheel hub caused by frequent braking; loose axle nut, etc., will cause oil spilling from wheel hub of small concrete mixer. Therefore, "cavity lubrication method" should be used to dredge the vent hole;

▌及時更換失效油封：小型水泥自動攪拌車上很多動置部位會因安裝不妥，軸頸與油封刃口不同心，偏擺而甩油。有些油封使用過久會因橡膠老化而失去彈性。發現滲漏及時更新；

▌ timely replace the invalid oil seal: many movable parts on the small concrete mixer truck may throw oil due to improper installation, the journal and the oil seal edge are not concentric, and swing. Some oil seals will lose elasticity due to rubber aging. Timely update if leakage is found;

▌妥善解決水泥自動攪拌車各類油管接頭密封：車用聯管螺母經常拆裝，容易滑絲斷扣而松脫，會引起滲油。更換聯管螺母，用研磨法解決其錐面密封，使螺母壓緊而解決密封。

▌ properly solve the sealing of all kinds of oil pipe joints of concrete mixer truck: the truck union nut is often disassembled and disassembled, which is easy to break the thread and loosen, which will cause oil leakage. Replace the union nut, use grinding method to solve the cone sealing, so that the nut is pressed to solve the sealing.

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