Hervorheben:
All-Terrain Hydraulic Cylinder Seal Kit
, Wheel Loader 990K Repair Seal Kit
, Large Hydraulic Cylinder Seal Kit
1. Quick Details of seal 394-4402:
| Part NO. |
394-4402 |
| Machine |
wheel loader |
| Size |
OEM |
| Material |
NBR |
| Oil seal type |
SEAL KIT
|
2. 394-4402 picture:
3. Service part number :
| PART NO. |
PART NO. |
Part NO. |
| 567-1748 |
2225824 |
2D-6533 |
| 1410749 |
3052215 |
8M-4389 |
| 1453576 |
2074710 |
9H-3360 |
| 2314707 |
6V5326 |
6F-8146 |
| 4S5924 |
6E4240 |
3D-8422 |
| 5494308 |
5673612 |
6V-1196 |
| 5673714 |
5673611 |
5P-4889 |
| 951701 |
1401800 |
032-8970 |
| 2100835 |
2339744 |
325-3780 |
| 5671750 |
1598010 |
4F-8824 |
| 5671748 |
8T7000 |
2S8439 |
| 161-9835 |
5P5874 |
3511768 |
4. FAQ
Q: Please describe the natural color, surface texture and structural style of all components in the kit without any extra coating or pigment.
A: Components made of low-temperature resistant NBR present uniform jet black, with a soft velvety surface and fine grain texture, and they can be bent freely without permanent deformation. Reinforced polyurethane seals are dark amber, featuring a dense and solid texture with smooth finished edges. Glass-filled PTFE backup rings are light gray, and tiny glass particle textures can be observed on the flat surface. The fabric guide rings are natural russet brown, with neat woven textures running across the whole surface. All parts adopt standard industrial sealing profiles, including U-type, square-cut and circular styles, and every edge is precisely machined without burrs or defects.
Q: What are the unique advantages of low-temperature resistant NBR compared with conventional rubber materials in actual use?
A: Different from ordinary rubber that tends to harden and lose flexibility in cold weather, this customized NBR formula is enhanced with low-temperature resistance technology. It can maintain excellent sealing elasticity when the ambient temperature drops sharply, and will not crack or shrink due to cold brittleness. Meanwhile, it inherits excellent oil resistance and anti-aging properties. After long-term immersion in hydraulic oil and exposure to alternating wind, frost and sunlight on open construction sites, its overall performance stays stable, fully adapting to all-weather operation in regions with obvious seasonal temperature differences.
Q: In what working scenarios do reinforced polyurethane seals show their greatest value?
A: As the core dynamic sealing parts, polyurethane seals bear the longest running cycles and the largest working loads. When the loader lifts heavy bulk materials, stretches and retracts the boom continuously, or swings the bucket to complete loading and dumping actions, these seals closely fit the moving rod and piston. They can resist continuous friction and periodic pressure changes effectively, and will not deform or creep even after tens of thousands of reciprocating movements. Their reliable performance directly ensures the lifting force and operating sensitivity of the entire hydraulic system.
Q: How do glass-filled PTFE backup rings cooperate with main seals to extend the overall service life?
A: The added glass fiber greatly improves the structural rigidity and compression resistance of PTFE material. These thin backup rings are installed beside the main PU seals, filling the tiny gaps of installation grooves completely. When the loader suddenly lifts ultra-heavy materials or travels over bumpy ground to generate instantaneous hydraulic pressure peaks, the PTFE rings can share the excessive pressure evenly, preventing the lip of main seals from being squeezed, twisted or damaged. Besides, its low-friction characteristic also optimizes the moving smoothness of internal components.
Q: What practical effects do fabric guide rings bring to the operation of hydraulic cylinders?
A: During the working process, unbalanced load will generate certain lateral thrust on the piston. The fabric guide ring can absorb and offset this eccentric force in real time, guiding the piston to move along the central axis all the time. It avoids eccentric wear caused by piston deviation, and greatly reduces the direct friction between metal parts. This not only makes the cylinder run more stably and quietly, but also slows down the wear speed of the cylinder tube and piston, protecting expensive metal components effectively.
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Oil seals,Hydraulic Seals, Cylinders Seal Kits, And More
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