· The lifting leg of the truck is slow or does not move
1. Check if there is something wrong with the truck crane hydraulic system;
2. Check whether the lifting valve of the truck is able to reduce the set pressure due to loosening of the adjusting screw. Can the valve seat be damaged or dusty on the outside surface of the valve? Can the valve be stuck in the open position? Can the needle valve wear out and the spring can be deformed? Or damage, see the situation stop adjusting or repairing;
3, check the truck hanging valve, see whether the valve stem wear, whether the valve can be deformed or damaged, look at the situation with the change; Fourth, check the leg cylinder, see if the piston can get stuck, the piston rod can be bent, Look at the situation and change.
• Retract the cylinder rod when lifting the cylinder;
1. Check the pilot-operated check valve to see whether the seat surface is damaged or dusty, whether the valve or piston can be stuck in the open position, whether the spring is intact, and whether the O-ring can be in good condition. ;
2, check the leg lift cylinder to see if the sealed O-type can be damaged, the cylinder arm can scratch, see the situation with the exchange or repair.
· The outriggers stick out when the vehicle is lifted
1, check the manual control valve {for legs}, see whether the hydraulic control check valve seat surface damage or dust, hydraulic check valve can be stuck, the spring can damage, see the situation to stop repairing or with change;
2, check the leg lift cylinder to see if the seal O-ring can be damaged or worn, the cylinder arm can be scratched, see the status of repair.
· The lifting system of the truck crane is slow or does not move
1. Check if there is something wrong with the truck crane hydraulic system;
2. Check the truck lift relief valve;
3. Check the manual control valve on the crane to see whether the valve stem can wear out, whether the valve can be damaged inside or not. See the situation and stop repairing;
4, check the truck crane slewing reducer to see if the gear or the bearing can get stuck, whether it can be lost due to serious wear and tear, the output shaft can be broken, look at the status of repair or change.
Doors & Windows Profile Extrusion Dies
As the eyes and soul of a building, doors and windows are directly related to the quality of the building and the quality of living life. It is not only a tool to protect from wind and rain, but also has the function of separating the inside of the home from the outside society. It also plays an important decorative role. What are the advantages of aluminum alloy door and window profiles?
1. Strong plasticity
Aluminum alloy profiles are metal materials. Aluminum is added with various metal elements to make various alloys. It has the unparalleled advantages of other alloy profiles: light weight and high strength, and can be extruded into various complex cross-section profiles to meet the design of doors and windows. The various new cross-section requirements of the division.
2. Good sealing performance
Aluminum alloy profiles have strong air tightness, water tightness, heat insulation and sound insulation. These properties are suitable for various specific applications in the door and window industry.
3. Long service life
Aluminum alloy profiles have the advantages of light weight, high strength, corrosion resistance, small deformation, strong fire resistance and long service life (more than 50 years).
4. Environmental protection and energy saving
The broken bridge aluminum alloy profile uses a new type of thermal insulation material nylon 66 to form a hot and cold bridge between the inner and outer profiles, thereby minimizing the heat conduction of the aluminum alloy and achieving excellent heat and sound insulation effects.
5. Excellent weather resistance
Aluminum alloy profiles have been treated with various processes, and the surface is resistant to acid and alkali erosion and is not affected by air pollution, acid rain, and ozone. UV resistant, retains inherent color and luster for a long time.
6. Elegant decorative effect
The surface of aluminum alloy profiles can be subjected to various surface treatments, such as powder spraying, anodizing, electrophoretic coating, wood grain transfer and other surface treatment technologies. There are a variety of colors and wood grains. There is a wide range of choices to meet various needs. It meets the needs of architectural decoration and puts beautiful clothes on the building.
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Foshan Jieliwei Metal Products Co., Ltd. , https://www.foshanjlw.com