传菜式升降机的工作原理是液压泵产生出高压液压油并推动油缸活塞往复运动从而带动传菜式升降机轿厢上下运行。传菜式升降机液压油如果出现深褐色、乳雪白色、有异味的液压油是变质油，不可以使用的。干净的传菜式升降机液压油应该说是液压系统的生命，液压系统中有很多精细部件，如果有固体杂质入侵会造成油道堵塞等，危及液压系统的安全运行。
Chuan Cuisine lift pump works by generating a high-pressure hydraulic oil and push the cylinder piston reciprocates so as to drive the car to run up and down the lift pass dishes. Chuan dishes elevators hydraulic oil if there is a dark brown, milk white snow, the smell of deterioration of hydraulic oil is oil, it can not be used. Clean dishes lift pass hydraulic oil should be said that the life of the hydraulic system, hydraulic system, there are many fine parts, if there is solid impurities invasion will cause the oil duct blockage, endangering the safe operation of the hydraulic system.

传菜式升降机液压油在油泵、油缸内流动摩擦必然产生一定热量，同时油箱内的高温也会向周围空气散发热量。液压系统是传菜式升降机的心脏，液压油是液压系统的血液。
Chuan dishes elevators hydraulic oil pump, the fuel tank flow friction inevitably produce some heat, while the high temperature inside the tank will dissipate heat to the surrounding air. Hydraulic lift system is the transfer of cuisine in the heart of the hydraulic oil is the blood of the hydraulic system.

传菜式升降机液压油的理想工作温度是30～50℃，实际要求的工作温度小于70℃。
Chuan dishes elevators hydraulic oil ideal operating temperature is 30 ~ 50 ℃, the actual work required temperature is less than 70 ℃.