371-2697 3712697 Industrial Hydraulic Cylinder Seal Kit for Asphalt Paver Machinery 247B 247B3

1. Quick Details of  seal 371-2697:

2. 371-2697 parts on group :

3.  371-2697 picture:

4. Service part number :

5. FAQ

Q: What performance merits make low-compression set PU the ideal choice for main dynamic seals?
A: The hydraulic cylinders of asphalt pavers mostly perform short-stroke and frequent reciprocating movements, and the seals stay under continuous compression for a long time. This low-compression set PU material can effectively resist permanent deformation under long-term pressure. Even after thousands of hours of continuous compression and movement, it can still closely fit the cylinder rod and piston, without gaps appearing between matching surfaces. It also has good high-temperature resistance and wear resistance, and will not soften or deform under the ambient heat generated by hot asphalt, ensuring lasting and reliable dynamic sealing effect.

Q: How do silica-filled PTFE backup rings work with main seals to extend the overall service life?
A: Pure PTFE is prone to softening and deformation in high-temperature environments. After adding silica fillers, its high-temperature stability and structural rigidity are greatly improved. Installed beside the main PU seals, these backup rings fully fill the gaps of mounting grooves. When the paver adjusts the screed angle or lifts the full material hopper to generate instantaneous pressure surges, they evenly share the impact pressure and prevent the seal lips from being squeezed and damaged. In addition, its excellent self-lubricating property reduces operating friction and heat accumulation, further slowing down the aging speed of all sealing components.

Q: What practical functions do woven fabric composite guide rings realize during piston movement?
A: When the hopper holds uneven asphalt aggregates or the screed is stressed unilaterally during paving, the piston will be subjected to irregular lateral thrust. The woven fabric composite guide ring can absorb and offset this eccentric force in real time, guiding the piston to move along the central axis steadily. It reduces direct friction between metal parts, lowers running noise, and relieves wear on the cylinder wall and piston. The tough woven structure also has certain heat insulation performance, which can block part of external high temperature and create a more stable working environment for internal components.

Q: Are all components manufactured in accordance with original equipment dimensional standards?
A: Every seal, O-ring, backup ring and guide ring is produced strictly in accordance with OEM design drawings and dimensional parameters. The inner diameter, outer diameter and thickness of each part are completely consistent with original accessories. Maintenance personnel do not need to cut, grind or modify the cylinder and grooves during replacement, achieving a precise and hassle-free direct fit.

Q: What important rules should be followed during disassembly and on-site installation?
A: Before installation, fully clean the cylinder inner wall, piston and mounting grooves to remove residual asphalt dust, oil dirt and old seal fragments. Do not use sharp tools to pry or bend new seals, so as to avoid surface damage. Apply a thin layer of clean hydraulic oil for lubrication before assembly, and install components in the specified order. After assembly, run the equipment with no load first to check for stuck movement, abnormal noise or oil leakage.

Q: Can customers purchase individual accessories separately instead of the complete kit?
A: This product is mainly sold as a complete set for one full maintenance of a single hydraulic cylinder, which ensures the coordinated service life and overall matching performance of all parts. If individual parts are accidentally damaged during installation or use, you can provide detailed size and style information, and we can supply corresponding single accessories separately.

6. Exhibition and Wearhous

Oil seals,Hydraulic Seals, Cylinders Seal Kits, And More