Aluminum lift Troubleshooting and Repair Method

Repair method directory common methods and measures to maintain the hydraulic lift system -------------------------------------- -----------------------


1. Select a suitable hydraulic oil ------------------- -------------------------------------------------- ---------------
1 2. To prevent contamination of the hydraulic system of solid -------------------------- -----------------------------------------------
1 2.1 refueling when ------------------------------------------------- --------------------------------------- maintenance when a
2.2 ------- -------------------------------------------------- ------------------------------- a hydraulic system cleaning -------------
2.3 -------------------------------------------------- --------------
2 3. To prevent air and water intrusion hydraulic systems --------------------------
2 3.1 ----------------------------------------------- prevent air intrusion hydraulic system ----------------------------------------------
3.2 ----------------------- two hydraulic systems to prevent water intrusion -------------------- -------------------------------------------------- -
2 4. job ------------------------------------------ Notes ---------------------------------------------
2 4.1 Mechanical job to soft and smooth ------------------------------------------------
4.2 ----------------------- two cargo lifts should be uniform ------------------- -------------------------------------------------- -


2 common

Maintenance methods and measures for aluminum lift hydraulic system mechanized construction companies, engineering machinery technical condition is good or not is a direct factor in the ability of the business to normal production. On Hydraulic engineering machinery, the normal operation of the hydraulic system is a major sign of their good technical condition. Qualified hydraulic oil is to protect the reliable operation of the hydraulic system, proper maintenance and reliable operation of the hydraulic system is fundamental. Therefore, I practice based on the work on maintaining the general operating environment of a hydraulic system to explore for crude.

1. Select the appropriate hydraulic oil hydraulic oil in the hydraulic system plays a delivery pressure, lubrication, cooling and sealing effect, inappropriate choice of hydraulic oil hydraulic system failures and durability of early decline. When selecting hydraulic oil grade should be random "manual" in the provisions of the special circumstances need to use on behalf of the oil, it should seek the same performance as the original grade performance. Different brands of hydraulic oil can not be mixed, to prevent hydraulic fluid chemical reaction, changes in performance. Dark brown, white, smelly oil hydraulic oil is degenerate, not be used.

2. To prevent contamination of the hydraulic system of solid clean hydraulic oil is the life of the hydraulic system. Hydraulic system has many precision coupling, some damping holes, and some have gaps and so on. If the solid impurities invasion will result in precision coupling strain, card issuers, oil duct blockage, endangering the safe operation of the hydraulic system. Generally solid impurities invasion pathways hydraulic system: hydraulic oil unclean; refueling tool unclean; refueling and repair, maintenance accidentally; scaling and other hydraulic components. You can prevent from the following aspects of solid impurities intrusion system:

2.1 refueling hydraulic oil must be filtered filling, refueling tools should be reliable clean. Not in order to improve the speed and remove the fuel tank fuel filter at the outlet. Refueling personnel should use clean gloves and coveralls to prevent solid impurities and fiber impurities fall into the oil.

2.2 Maintenance Removing the hydraulic tank filler cap, filter cover, test holes, hydraulic tubing and other parts, causing the system to avoid dust exposure to the oil channel, after the demolition of the site must first be thoroughly cleaned to open. Such as the demolition hydraulic tank filler cap, first remove the soil around the tank cap, wring pine oil cover, remove the debris left in the joint position (not rinse tank to prevent water infiltration), confirmed to open the fuel cap clean. For use when wiping material and hammer, can not afford to wipe material should be selected and the striking surface attached fiber impurities special rubber hammer. Hydraulic components, hydraulic hose must be carefully cleaned, blown dry with high pressure after assembly. Selection
Packaging intact authentic filter (inside the packaging is damaged, although the filter intact, it may unclean). While cleaning the filter oil change, the application materials carefully wipe clean the dirt at the bottom of the filter housing before installing the filter.

2.3 Cleaning Cleaning the oil hydraulic system used with the system must use the same grade hydraulic oil, the oil temperature between 45 ~ 80 ℃, with a large flow as much as possible impurities in the system away. Hydraulic system to repeatedly washed three times or more, after each wash, the entire release system to take advantage of the oil is hot. Then wash the filter cleaning is completed, after filling the new oil filter replacement.

3. To prevent the invasion of air and water to prevent air intrusion

3.1 hydraulic system comprising a hydraulic system with hydraulic fluid under normal pressure at room temperature in a volume ratio of 6 to 8% of the air, when the air pressure decreases from the oil would be freed, so that the collapse of bubble hydraulic element "cavitation" noise. A lot of air into the oil will make the "cavitation" phenomenon intensified, hydraulic oil compression increases, job insecurity, reduced efficiency, the implementation of components appear to work "crawl" and other adverse consequences. The air also causes oxidation of the hydraulic oil, accelerating deterioration of the oil. Prevent air intrusion should note the following points:

1, after repairs and oil changes according to the random "manual" for excluding air from the system to normal operation.

2, hydraulic pump suction nozzle shall not expose the oil, the suction line must be sealed well.


3, the oil pump drive shaft seal should be good to pay attention to where the seals should be replaced using the "lips" genuine seal, can not use the "single-lip" seal instead, because the "single lip" seal oil seal in one direction only, do not have sealing air function. The unit had an overhaul after Liugong ZL50 loader, hydraulic pumps consecutive "cavitation" noise, such as elevated oil tank automatic failure, hydraulic pump repair process through inquiry, discovery is the hydraulic pump drive shaft seal misuse "single lip "seal due.


3.2 to prevent water intrusion hydraulic system oil contains excess moisture, hydraulic components will rust, oil emulsion deterioration, reduced lubricant film strength, speed mechanical wear. Except when maintenance to prevent moisture intrusion, but also do not pay attention to storage drums to tighten the lid, preferably upside down; the water content may be several large oil filters, each filter should be replaced once a dry filter paper, in the absence of special instruments to detect, can be oil droplets into a hot iron on no vapor can only fill out and immediately burn.

4. Job

4.1 Precautions should be soft smooth mechanical operation of mechanical operations should avoid rough, this would certainly have an impact load, so that mechanical failure-prone, shortened life. Shock loads generated during operation, while the mechanical structure of early wear, fracture, broken, on the one hand to make an impact pressure of the hydraulic system, the impact pressure will make the damage hydraulic components, seals and laminated at high pressure tubing and hose fittings premature failure of the oil spill or burst pipes, oil temperature rise relief frequent movement.


4.2 evenly lift cargo lift in the job, be sure to pay attention to placement of goods. Some lift cargo weight contained within the rated load range, but favor one side or corner of the place when you place the goods; so overloaded truck lifts and style the same, especially aluminum lift; when placing the goods must be uniform or as placed center position