重慶升降機等工程機械的應用可以使高空作業效率更高，更安全。但是，在工程機械維修保養時我們需要注意哪些問題呢？Chongqing lift and other construction machinery applications can make aerial work more efficient, more secure. However, in the construction machinery maintenance, we need to pay attention to what the problem?

1.重慶升降機新品不經選配。換裝汽缸套活塞必須檢查標準缸套與活塞的尺寸分組代號，裝用的缸套和活塞必須使二者的尺寸分組代號相同，以保證標準的配合間隙。Chongqing elevator new products without matching. Change cylinder sleeve piston size grouping code must check standard of cylinder liner and piston, fitted with the cylinder liner and piston size grouping code two must be the same, in order to ensure the gap with the standard.

2.汽缸間隙測量不準。測量時規定以橢圓長軸方向的間隙為準，即測量活塞裙部垂直于活塞銷孔方向的間隙。這樣測量比較方便、準確。Cylinder clearance measurement. In the measurement, the clearance between the long axis of the ellipse is specified, that is, the gap between the piston skirt and the direction of the piston pin hole is measured. This measurement is more convenient and accurate.

3.明火加溫活塞。明火直接加熱活塞，活塞各部分薄厚不均，熱脹冷縮度不一，容易引起變形，如達到一定高溫，自然冷卻后金屬組織會遭到損壞而降低耐磨性，使用壽命會大大縮短。Open flame heating piston. Direct fired heater piston, piston parts of uneven thickness of thermal expansion and contraction degree, easy to cause deformation, such as up to a certain temperature, natural cooling of metal structure will damage and reduce the wear resistance and service life will be shortened.

4.砂布打磨軸瓦。不少維修工為增加瓦與軸的接觸面，就有砂布打磨軸瓦，因沙粒硬，合金軟，打磨時沙粒很容易嵌入合金里，發動機工作時加速軸瓦的磨損，縮短曲軸的使用壽命。Emery cloth polishing pad. Many maintenance workers to increase the contact surface tile and shaft, with emery cloth polishing pad, because of hard alloy grinding sand, soft sand, when it is easy to embed in the alloy, when the engine works to accelerate bearing wear, shorten the service life of the crankshaft.

5.重慶升降機機油只加不換。使用過的油中機械雜質殘留很多，即使放盡，油底殼及油路中仍存有雜質。Chongqing lift oil only add not to change. The use of mechanical impurities in the oil a lot of impurities, even if the release, oil and oil at the bottom of the oil still exist impurities.

6.潤滑脂亂用亂涂。有些修理工安裝汽缸墊時，喜歡涂一層潤滑脂在汽缸墊上，汽缸墊不但要求嚴格密封汽缸內所產生的高溫高壓氣體，還要密封汽缸蓋和缸體內的具有一定壓力和流速的冷卻水和機油。Grease with chaos. Some repair installation of cylinder pad, love is coated with a layer of grease in the cylinder head gasket, cylinder pad not only requires high temperature and high pressure gas tight seal cylinder produced by the cooling water and the oil has a certain pressure and velocity to seal the cylinder cover and the cylinder.

7.螺栓擰得太緊。預緊力過大會造成螺釘和螺栓折斷或螺紋滑絲等。The bolt is screwed too tight. Pre tightening force of the assembly caused by bolt and bolt broken or screw thread, etc..

8.重慶升降機輪胎氣壓過高。輪胎氣壓過高過低都會影響其使用壽命，同時也不利安全行駛。Chongqing lift tire pressure is too high. Tire pressure is too low will affect the life of the tire, but also adversely safe driving.